Merge branch 'x86/asm' into tracing/syscalls
We need the wider TIF work-mask checks in entry_32.S. Signed-off-by: Ingo Molnar <mingo@elte.hu>hifive-unleashed-5.1
Ingo Molnar
commit
62395efdb0
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@ -933,6 +933,12 @@ config X86_CPUID
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with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
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/dev/cpu/31/cpuid.
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config X86_CPU_DEBUG
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tristate "/sys/kernel/debug/x86/cpu/* - CPU Debug support"
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---help---
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If you select this option, this will provide various x86 CPUs
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information through debugfs.
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choice
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prompt "High Memory Support"
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default HIGHMEM4G if !X86_NUMAQ
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@ -1433,7 +1439,7 @@ config CRASH_DUMP
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config KEXEC_JUMP
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bool "kexec jump (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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depends on KEXEC && HIBERNATION && X86_32
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depends on KEXEC && HIBERNATION
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---help---
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Jump between original kernel and kexeced kernel and invoke
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code in physical address mode via KEXEC
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@ -6,26 +6,23 @@
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# for more details.
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#
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# Copyright (C) 1994 by Linus Torvalds
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# Changed by many, many contributors over the years.
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#
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# ROOT_DEV specifies the default root-device when making the image.
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# This can be either FLOPPY, CURRENT, /dev/xxxx or empty, in which case
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# the default of FLOPPY is used by 'build'.
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ROOT_DEV := CURRENT
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ROOT_DEV := CURRENT
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# If you want to preset the SVGA mode, uncomment the next line and
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# set SVGA_MODE to whatever number you want.
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# Set it to -DSVGA_MODE=NORMAL_VGA if you just want the EGA/VGA mode.
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# The number is the same as you would ordinarily press at bootup.
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SVGA_MODE := -DSVGA_MODE=NORMAL_VGA
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SVGA_MODE := -DSVGA_MODE=NORMAL_VGA
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# If you want the RAM disk device, define this to be the size in blocks.
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#RAMDISK := -DRAMDISK=512
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targets := vmlinux.bin setup.bin setup.elf zImage bzImage
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targets := vmlinux.bin setup.bin setup.elf bzImage
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subdir- := compressed
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setup-y += a20.o cmdline.o copy.o cpu.o cpucheck.o edd.o
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@ -71,17 +68,13 @@ KBUILD_CFLAGS := $(LINUXINCLUDE) -g -Os -D_SETUP -D__KERNEL__ \
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KBUILD_CFLAGS += $(call cc-option,-m32)
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KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
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$(obj)/zImage: asflags-y := $(SVGA_MODE) $(RAMDISK)
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$(obj)/bzImage: ccflags-y := -D__BIG_KERNEL__
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$(obj)/bzImage: asflags-y := $(SVGA_MODE) $(RAMDISK) -D__BIG_KERNEL__
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$(obj)/bzImage: BUILDFLAGS := -b
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$(obj)/bzImage: asflags-y := $(SVGA_MODE)
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quiet_cmd_image = BUILD $@
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cmd_image = $(obj)/tools/build $(BUILDFLAGS) $(obj)/setup.bin \
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$(obj)/vmlinux.bin $(ROOT_DEV) > $@
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cmd_image = $(obj)/tools/build $(obj)/setup.bin $(obj)/vmlinux.bin \
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$(ROOT_DEV) > $@
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$(obj)/zImage $(obj)/bzImage: $(obj)/setup.bin \
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$(obj)/vmlinux.bin $(obj)/tools/build FORCE
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$(obj)/bzImage: $(obj)/setup.bin $(obj)/vmlinux.bin $(obj)/tools/build FORCE
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$(call if_changed,image)
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@echo 'Kernel: $@ is ready' ' (#'`cat .version`')'
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@ -24,12 +24,8 @@
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#include "boot.h"
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#include "offsets.h"
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SETUPSECTS = 4 /* default nr of setup-sectors */
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BOOTSEG = 0x07C0 /* original address of boot-sector */
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SYSSEG = DEF_SYSSEG /* system loaded at 0x10000 (65536) */
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SYSSIZE = DEF_SYSSIZE /* system size: # of 16-byte clicks */
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/* to be loaded */
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ROOT_DEV = 0 /* ROOT_DEV is now written by "build" */
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SYSSEG = 0x1000 /* historical load address >> 4 */
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#ifndef SVGA_MODE
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#define SVGA_MODE ASK_VGA
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@ -97,12 +93,12 @@ bugger_off_msg:
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.section ".header", "a"
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.globl hdr
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hdr:
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setup_sects: .byte SETUPSECTS
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setup_sects: .byte 0 /* Filled in by build.c */
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root_flags: .word ROOT_RDONLY
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syssize: .long SYSSIZE
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ram_size: .word RAMDISK
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syssize: .long 0 /* Filled in by build.c */
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ram_size: .word 0 /* Obsolete */
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vid_mode: .word SVGA_MODE
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root_dev: .word ROOT_DEV
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root_dev: .word 0 /* Filled in by build.c */
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boot_flag: .word 0xAA55
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# offset 512, entry point
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@ -123,14 +119,15 @@ _start:
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# or else old loadlin-1.5 will fail)
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.globl realmode_swtch
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realmode_swtch: .word 0, 0 # default_switch, SETUPSEG
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start_sys_seg: .word SYSSEG
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start_sys_seg: .word SYSSEG # obsolete and meaningless, but just
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# in case something decided to "use" it
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.word kernel_version-512 # pointing to kernel version string
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# above section of header is compatible
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# with loadlin-1.5 (header v1.5). Don't
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# change it.
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type_of_loader: .byte 0 # = 0, old one (LILO, Loadlin,
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# Bootlin, SYSLX, bootsect...)
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type_of_loader: .byte 0 # 0 means ancient bootloader, newer
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# bootloaders know to change this.
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# See Documentation/i386/boot.txt for
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# assigned ids
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@ -142,11 +139,7 @@ CAN_USE_HEAP = 0x80 # If set, the loader also has set
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# space behind setup.S can be used for
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# heap purposes.
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# Only the loader knows what is free
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#ifndef __BIG_KERNEL__
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.byte 0
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#else
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.byte LOADED_HIGH
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#endif
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setup_move_size: .word 0x8000 # size to move, when setup is not
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# loaded at 0x90000. We will move setup
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@ -157,11 +150,7 @@ setup_move_size: .word 0x8000 # size to move, when setup is not
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code32_start: # here loaders can put a different
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# start address for 32-bit code.
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#ifndef __BIG_KERNEL__
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.long 0x1000 # 0x1000 = default for zImage
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#else
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.long 0x100000 # 0x100000 = default for big kernel
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#endif
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ramdisk_image: .long 0 # address of loaded ramdisk image
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# Here the loader puts the 32-bit
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@ -32,47 +32,6 @@ static void realmode_switch_hook(void)
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}
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}
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/*
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* A zImage kernel is loaded at 0x10000 but wants to run at 0x1000.
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* A bzImage kernel is loaded and runs at 0x100000.
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*/
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static void move_kernel_around(void)
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{
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/* Note: rely on the compile-time option here rather than
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the LOADED_HIGH flag. The Qemu kernel loader unconditionally
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sets the loadflags to zero. */
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#ifndef __BIG_KERNEL__
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u16 dst_seg, src_seg;
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u32 syssize;
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dst_seg = 0x1000 >> 4;
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src_seg = 0x10000 >> 4;
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syssize = boot_params.hdr.syssize; /* Size in 16-byte paragraphs */
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while (syssize) {
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int paras = (syssize >= 0x1000) ? 0x1000 : syssize;
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int dwords = paras << 2;
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asm volatile("pushw %%es ; "
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"pushw %%ds ; "
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"movw %1,%%es ; "
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"movw %2,%%ds ; "
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"xorw %%di,%%di ; "
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"xorw %%si,%%si ; "
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"rep;movsl ; "
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"popw %%ds ; "
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"popw %%es"
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: "+c" (dwords)
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: "r" (dst_seg), "r" (src_seg)
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: "esi", "edi");
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syssize -= paras;
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dst_seg += paras;
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src_seg += paras;
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}
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#endif
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}
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/*
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* Disable all interrupts at the legacy PIC.
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*/
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@ -147,9 +106,6 @@ void go_to_protected_mode(void)
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/* Hook before leaving real mode, also disables interrupts */
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realmode_switch_hook();
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/* Move the kernel/setup to their final resting places */
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move_kernel_around();
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/* Enable the A20 gate */
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if (enable_a20()) {
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puts("A20 gate not responding, unable to boot...\n");
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@ -130,7 +130,7 @@ static void die(const char * str, ...)
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static void usage(void)
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{
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die("Usage: build [-b] setup system [rootdev] [> image]");
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die("Usage: build setup system [rootdev] [> image]");
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}
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int main(int argc, char ** argv)
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@ -145,11 +145,6 @@ int main(int argc, char ** argv)
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void *kernel;
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u32 crc = 0xffffffffUL;
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if (argc > 2 && !strcmp(argv[1], "-b"))
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{
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is_big_kernel = 1;
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argc--, argv++;
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}
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if ((argc < 3) || (argc > 4))
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usage();
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if (argc > 3) {
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@ -216,8 +211,6 @@ int main(int argc, char ** argv)
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die("Unable to mmap '%s': %m", argv[2]);
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/* Number of 16-byte paragraphs, including space for a 4-byte CRC */
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sys_size = (sz + 15 + 4) / 16;
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if (!is_big_kernel && sys_size > DEF_SYSSIZE)
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die("System is too big. Try using bzImage or modules.");
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/* Patch the setup code with the appropriate size parameters */
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buf[0x1f1] = setup_sectors-1;
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@ -1,10 +1,6 @@
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#ifndef _ASM_X86_BOOT_H
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#define _ASM_X86_BOOT_H
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/* Don't touch these, unless you really know what you're doing. */
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#define DEF_SYSSEG 0x1000
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#define DEF_SYSSIZE 0x7F00
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/* Internal svga startup constants */
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#define NORMAL_VGA 0xffff /* 80x25 mode */
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#define EXTENDED_VGA 0xfffe /* 80x50 mode */
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@ -0,0 +1,193 @@
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#ifndef _ASM_X86_CPU_DEBUG_H
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#define _ASM_X86_CPU_DEBUG_H
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/*
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* CPU x86 architecture debug
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*
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* Copyright(C) 2009 Jaswinder Singh Rajput
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*/
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/* Register flags */
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enum cpu_debug_bit {
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/* Model Specific Registers (MSRs) */
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CPU_MC_BIT, /* Machine Check */
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CPU_MONITOR_BIT, /* Monitor */
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CPU_TIME_BIT, /* Time */
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CPU_PMC_BIT, /* Performance Monitor */
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CPU_PLATFORM_BIT, /* Platform */
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CPU_APIC_BIT, /* APIC */
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CPU_POWERON_BIT, /* Power-on */
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CPU_CONTROL_BIT, /* Control */
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CPU_FEATURES_BIT, /* Features control */
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CPU_LBRANCH_BIT, /* Last Branch */
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CPU_BIOS_BIT, /* BIOS */
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CPU_FREQ_BIT, /* Frequency */
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CPU_MTTR_BIT, /* MTRR */
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CPU_PERF_BIT, /* Performance */
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CPU_CACHE_BIT, /* Cache */
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CPU_SYSENTER_BIT, /* Sysenter */
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CPU_THERM_BIT, /* Thermal */
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CPU_MISC_BIT, /* Miscellaneous */
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CPU_DEBUG_BIT, /* Debug */
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CPU_PAT_BIT, /* PAT */
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CPU_VMX_BIT, /* VMX */
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CPU_CALL_BIT, /* System Call */
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CPU_BASE_BIT, /* BASE Address */
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CPU_SMM_BIT, /* System mgmt mode */
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CPU_SVM_BIT, /*Secure Virtual Machine*/
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CPU_OSVM_BIT, /* OS-Visible Workaround*/
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/* Standard Registers */
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CPU_TSS_BIT, /* Task Stack Segment */
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CPU_CR_BIT, /* Control Registers */
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CPU_DT_BIT, /* Descriptor Table */
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/* End of Registers flags */
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CPU_REG_ALL_BIT, /* Select all Registers */
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};
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#define CPU_REG_ALL (~0) /* Select all Registers */
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#define CPU_MC (1 << CPU_MC_BIT)
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#define CPU_MONITOR (1 << CPU_MONITOR_BIT)
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#define CPU_TIME (1 << CPU_TIME_BIT)
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#define CPU_PMC (1 << CPU_PMC_BIT)
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#define CPU_PLATFORM (1 << CPU_PLATFORM_BIT)
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#define CPU_APIC (1 << CPU_APIC_BIT)
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#define CPU_POWERON (1 << CPU_POWERON_BIT)
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#define CPU_CONTROL (1 << CPU_CONTROL_BIT)
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#define CPU_FEATURES (1 << CPU_FEATURES_BIT)
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#define CPU_LBRANCH (1 << CPU_LBRANCH_BIT)
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#define CPU_BIOS (1 << CPU_BIOS_BIT)
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#define CPU_FREQ (1 << CPU_FREQ_BIT)
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#define CPU_MTRR (1 << CPU_MTTR_BIT)
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#define CPU_PERF (1 << CPU_PERF_BIT)
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#define CPU_CACHE (1 << CPU_CACHE_BIT)
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#define CPU_SYSENTER (1 << CPU_SYSENTER_BIT)
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#define CPU_THERM (1 << CPU_THERM_BIT)
|
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#define CPU_MISC (1 << CPU_MISC_BIT)
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#define CPU_DEBUG (1 << CPU_DEBUG_BIT)
|
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#define CPU_PAT (1 << CPU_PAT_BIT)
|
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#define CPU_VMX (1 << CPU_VMX_BIT)
|
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#define CPU_CALL (1 << CPU_CALL_BIT)
|
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#define CPU_BASE (1 << CPU_BASE_BIT)
|
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#define CPU_SMM (1 << CPU_SMM_BIT)
|
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#define CPU_SVM (1 << CPU_SVM_BIT)
|
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#define CPU_OSVM (1 << CPU_OSVM_BIT)
|
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#define CPU_TSS (1 << CPU_TSS_BIT)
|
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#define CPU_CR (1 << CPU_CR_BIT)
|
||||
#define CPU_DT (1 << CPU_DT_BIT)
|
||||
|
||||
/* Register file flags */
|
||||
enum cpu_file_bit {
|
||||
CPU_INDEX_BIT, /* index */
|
||||
CPU_VALUE_BIT, /* value */
|
||||
};
|
||||
|
||||
#define CPU_FILE_VALUE (1 << CPU_VALUE_BIT)
|
||||
|
||||
/*
|
||||
* DisplayFamily_DisplayModel Processor Families/Processor Number Series
|
||||
* -------------------------- ------------------------------------------
|
||||
* 05_01, 05_02, 05_04 Pentium, Pentium with MMX
|
||||
*
|
||||
* 06_01 Pentium Pro
|
||||
* 06_03, 06_05 Pentium II Xeon, Pentium II
|
||||
* 06_07, 06_08, 06_0A, 06_0B Pentium III Xeon, Pentum III
|
||||
*
|
||||
* 06_09, 060D Pentium M
|
||||
*
|
||||
* 06_0E Core Duo, Core Solo
|
||||
*
|
||||
* 06_0F Xeon 3000, 3200, 5100, 5300, 7300 series,
|
||||
* Core 2 Quad, Core 2 Extreme, Core 2 Duo,
|
||||
* Pentium dual-core
|
||||
* 06_17 Xeon 5200, 5400 series, Core 2 Quad Q9650
|
||||
*
|
||||
* 06_1C Atom
|
||||
*
|
||||
* 0F_00, 0F_01, 0F_02 Xeon, Xeon MP, Pentium 4
|
||||
* 0F_03, 0F_04 Xeon, Xeon MP, Pentium 4, Pentium D
|
||||
*
|
||||
* 0F_06 Xeon 7100, 5000 Series, Xeon MP,
|
||||
* Pentium 4, Pentium D
|
||||
*/
|
||||
|
||||
/* Register processors bits */
|
||||
enum cpu_processor_bit {
|
||||
CPU_NONE,
|
||||
/* Intel */
|
||||
CPU_INTEL_PENTIUM_BIT,
|
||||
CPU_INTEL_P6_BIT,
|
||||
CPU_INTEL_PENTIUM_M_BIT,
|
||||
CPU_INTEL_CORE_BIT,
|
||||
CPU_INTEL_CORE2_BIT,
|
||||
CPU_INTEL_ATOM_BIT,
|
||||
CPU_INTEL_XEON_P4_BIT,
|
||||
CPU_INTEL_XEON_MP_BIT,
|
||||
};
|
||||
|
||||
#define CPU_ALL (~0) /* Select all CPUs */
|
||||
|
||||
#define CPU_INTEL_PENTIUM (1 << CPU_INTEL_PENTIUM_BIT)
|
||||
#define CPU_INTEL_P6 (1 << CPU_INTEL_P6_BIT)
|
||||
#define CPU_INTEL_PENTIUM_M (1 << CPU_INTEL_PENTIUM_M_BIT)
|
||||
#define CPU_INTEL_CORE (1 << CPU_INTEL_CORE_BIT)
|
||||
#define CPU_INTEL_CORE2 (1 << CPU_INTEL_CORE2_BIT)
|
||||
#define CPU_INTEL_ATOM (1 << CPU_INTEL_ATOM_BIT)
|
||||
#define CPU_INTEL_XEON_P4 (1 << CPU_INTEL_XEON_P4_BIT)
|
||||
#define CPU_INTEL_XEON_MP (1 << CPU_INTEL_XEON_MP_BIT)
|
||||
|
||||
#define CPU_INTEL_PX (CPU_INTEL_P6 | CPU_INTEL_PENTIUM_M)
|
||||
#define CPU_INTEL_COREX (CPU_INTEL_CORE | CPU_INTEL_CORE2)
|
||||
#define CPU_INTEL_XEON (CPU_INTEL_XEON_P4 | CPU_INTEL_XEON_MP)
|
||||
#define CPU_CO_AT (CPU_INTEL_CORE | CPU_INTEL_ATOM)
|
||||
#define CPU_C2_AT (CPU_INTEL_CORE2 | CPU_INTEL_ATOM)
|
||||
#define CPU_CX_AT (CPU_INTEL_COREX | CPU_INTEL_ATOM)
|
||||
#define CPU_CX_XE (CPU_INTEL_COREX | CPU_INTEL_XEON)
|
||||
#define CPU_P6_XE (CPU_INTEL_P6 | CPU_INTEL_XEON)
|
||||
#define CPU_PM_CO_AT (CPU_INTEL_PENTIUM_M | CPU_CO_AT)
|
||||
#define CPU_C2_AT_XE (CPU_C2_AT | CPU_INTEL_XEON)
|
||||
#define CPU_CX_AT_XE (CPU_CX_AT | CPU_INTEL_XEON)
|
||||
#define CPU_P6_CX_AT (CPU_INTEL_P6 | CPU_CX_AT)
|
||||
#define CPU_P6_CX_XE (CPU_P6_XE | CPU_INTEL_COREX)
|
||||
#define CPU_P6_CX_AT_XE (CPU_INTEL_P6 | CPU_CX_AT_XE)
|
||||
#define CPU_PM_CX_AT_XE (CPU_INTEL_PENTIUM_M | CPU_CX_AT_XE)
|
||||
#define CPU_PM_CX_AT (CPU_INTEL_PENTIUM_M | CPU_CX_AT)
|
||||
#define CPU_PM_CX_XE (CPU_INTEL_PENTIUM_M | CPU_CX_XE)
|
||||
#define CPU_PX_CX_AT (CPU_INTEL_PX | CPU_CX_AT)
|
||||
#define CPU_PX_CX_AT_XE (CPU_INTEL_PX | CPU_CX_AT_XE)
|
||||
|
||||
/* Select all Intel CPUs*/
|
||||
#define CPU_INTEL_ALL (CPU_INTEL_PENTIUM | CPU_PX_CX_AT_XE)
|
||||
|
||||
#define MAX_CPU_FILES 512
|
||||
|
||||
struct cpu_private {
|
||||
unsigned cpu;
|
||||
unsigned type;
|
||||
unsigned reg;
|
||||
unsigned file;
|
||||
};
|
||||
|
||||
struct cpu_debug_base {
|
||||
char *name; /* Register name */
|
||||
unsigned flag; /* Register flag */
|
||||
};
|
||||
|
||||
struct cpu_cpuX_base {
|
||||
struct dentry *dentry; /* Register dentry */
|
||||
int init; /* Register index file */
|
||||
};
|
||||
|
||||
struct cpu_file_base {
|
||||
char *name; /* Register file name */
|
||||
unsigned flag; /* Register file flag */
|
||||
};
|
||||
|
||||
struct cpu_debug_range {
|
||||
unsigned min; /* Register range min */
|
||||
unsigned max; /* Register range max */
|
||||
unsigned flag; /* Supported flags */
|
||||
unsigned model; /* Supported models */
|
||||
};
|
||||
|
||||
#endif /* _ASM_X86_CPU_DEBUG_H */
|
||||
|
|
@ -91,7 +91,6 @@ static inline int desc_empty(const void *ptr)
|
|||
#define store_gdt(dtr) native_store_gdt(dtr)
|
||||
#define store_idt(dtr) native_store_idt(dtr)
|
||||
#define store_tr(tr) (tr = native_store_tr())
|
||||
#define store_ldt(ldt) asm("sldt %0":"=m" (ldt))
|
||||
|
||||
#define load_TLS(t, cpu) native_load_tls(t, cpu)
|
||||
#define set_ldt native_set_ldt
|
||||
|
|
@ -112,6 +111,8 @@ static inline void paravirt_free_ldt(struct desc_struct *ldt, unsigned entries)
|
|||
}
|
||||
#endif /* CONFIG_PARAVIRT */
|
||||
|
||||
#define store_ldt(ldt) asm("sldt %0" : "=m"(ldt))
|
||||
|
||||
static inline void native_write_idt_entry(gate_desc *idt, int entry,
|
||||
const gate_desc *gate)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -63,6 +63,7 @@ void *kmap_atomic_prot(struct page *page, enum km_type type, pgprot_t prot);
|
|||
void *kmap_atomic(struct page *page, enum km_type type);
|
||||
void kunmap_atomic(void *kvaddr, enum km_type type);
|
||||
void *kmap_atomic_pfn(unsigned long pfn, enum km_type type);
|
||||
void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot);
|
||||
struct page *kmap_atomic_to_page(void *ptr);
|
||||
|
||||
#ifndef CONFIG_PARAVIRT
|
||||
|
|
|
|||
|
|
@ -9,13 +9,13 @@
|
|||
# define PAGES_NR 4
|
||||
#else
|
||||
# define PA_CONTROL_PAGE 0
|
||||
# define PA_TABLE_PAGE 1
|
||||
# define PAGES_NR 2
|
||||
# define VA_CONTROL_PAGE 1
|
||||
# define PA_TABLE_PAGE 2
|
||||
# define PA_SWAP_PAGE 3
|
||||
# define PAGES_NR 4
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_X86_32
|
||||
# define KEXEC_CONTROL_CODE_MAX_SIZE 2048
|
||||
#endif
|
||||
|
||||
#ifndef __ASSEMBLY__
|
||||
|
||||
|
|
@ -136,10 +136,11 @@ relocate_kernel(unsigned long indirection_page,
|
|||
unsigned int has_pae,
|
||||
unsigned int preserve_context);
|
||||
#else
|
||||
NORET_TYPE void
|
||||
unsigned long
|
||||
relocate_kernel(unsigned long indirection_page,
|
||||
unsigned long page_list,
|
||||
unsigned long start_address) ATTRIB_NORET;
|
||||
unsigned long start_address,
|
||||
unsigned int preserve_context);
|
||||
#endif
|
||||
|
||||
#define ARCH_HAS_KIMAGE_ARCH
|
||||
|
|
|
|||
|
|
@ -1,6 +1,8 @@
|
|||
#ifndef _ASM_X86_LINKAGE_H
|
||||
#define _ASM_X86_LINKAGE_H
|
||||
|
||||
#include <linux/stringify.h>
|
||||
|
||||
#undef notrace
|
||||
#define notrace __attribute__((no_instrument_function))
|
||||
|
||||
|
|
@ -53,14 +55,9 @@
|
|||
.globl name; \
|
||||
name:
|
||||
|
||||
#ifdef CONFIG_X86_64
|
||||
#define __ALIGN .p2align 4,,15
|
||||
#define __ALIGN_STR ".p2align 4,,15"
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_X86_ALIGNMENT_16
|
||||
#define __ALIGN .align 16,0x90
|
||||
#define __ALIGN_STR ".align 16,0x90"
|
||||
#if defined(CONFIG_X86_64) || defined(CONFIG_X86_ALIGNMENT_16)
|
||||
#define __ALIGN .p2align 4, 0x90
|
||||
#define __ALIGN_STR __stringify(__ALIGN)
|
||||
#endif
|
||||
|
||||
#endif /* __ASSEMBLY__ */
|
||||
|
|
|
|||
|
|
@ -14,6 +14,8 @@ obj-y += vmware.o hypervisor.o
|
|||
obj-$(CONFIG_X86_32) += bugs.o cmpxchg.o
|
||||
obj-$(CONFIG_X86_64) += bugs_64.o
|
||||
|
||||
obj-$(CONFIG_X86_CPU_DEBUG) += cpu_debug.o
|
||||
|
||||
obj-$(CONFIG_CPU_SUP_INTEL) += intel.o
|
||||
obj-$(CONFIG_CPU_SUP_AMD) += amd.o
|
||||
obj-$(CONFIG_CPU_SUP_CYRIX_32) += cyrix.o
|
||||
|
|
|
|||
|
|
@ -1078,8 +1078,7 @@ void __cpuinit cpu_init(void)
|
|||
|
||||
atomic_inc(&init_mm.mm_count);
|
||||
me->active_mm = &init_mm;
|
||||
if (me->mm)
|
||||
BUG();
|
||||
BUG_ON(me->mm);
|
||||
enter_lazy_tlb(&init_mm, me);
|
||||
|
||||
load_sp0(t, ¤t->thread);
|
||||
|
|
@ -1145,8 +1144,7 @@ void __cpuinit cpu_init(void)
|
|||
*/
|
||||
atomic_inc(&init_mm.mm_count);
|
||||
curr->active_mm = &init_mm;
|
||||
if (curr->mm)
|
||||
BUG();
|
||||
BUG_ON(curr->mm);
|
||||
enter_lazy_tlb(&init_mm, curr);
|
||||
|
||||
load_sp0(t, thread);
|
||||
|
|
|
|||
|
|
@ -0,0 +1,785 @@
|
|||
/*
|
||||
* CPU x86 architecture debug code
|
||||
*
|
||||
* Copyright(C) 2009 Jaswinder Singh Rajput
|
||||
*
|
||||
* For licencing details see kernel-base/COPYING
|
||||
*/
|
||||
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/compiler.h>
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/debugfs.h>
|
||||
#include <linux/kprobes.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/percpu.h>
|
||||
#include <linux/signal.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/smp.h>
|
||||
|
||||
#include <asm/cpu_debug.h>
|
||||
#include <asm/paravirt.h>
|
||||
#include <asm/system.h>
|
||||
#include <asm/traps.h>
|
||||
#include <asm/apic.h>
|
||||
#include <asm/desc.h>
|
||||
|
||||
static DEFINE_PER_CPU(struct cpu_cpuX_base, cpu_arr[CPU_REG_ALL_BIT]);
|
||||
static DEFINE_PER_CPU(struct cpu_private *, priv_arr[MAX_CPU_FILES]);
|
||||
static DEFINE_PER_CPU(unsigned, cpu_modelflag);
|
||||
static DEFINE_PER_CPU(int, cpu_priv_count);
|
||||
static DEFINE_PER_CPU(unsigned, cpu_model);
|
||||
|
||||
static DEFINE_MUTEX(cpu_debug_lock);
|
||||
|
||||
static struct dentry *cpu_debugfs_dir;
|
||||
|
||||
static struct cpu_debug_base cpu_base[] = {
|
||||
{ "mc", CPU_MC }, /* Machine Check */
|
||||
{ "monitor", CPU_MONITOR }, /* Monitor */
|
||||
{ "time", CPU_TIME }, /* Time */
|
||||
{ "pmc", CPU_PMC }, /* Performance Monitor */
|
||||
{ "platform", CPU_PLATFORM }, /* Platform */
|
||||
{ "apic", CPU_APIC }, /* APIC */
|
||||
{ "poweron", CPU_POWERON }, /* Power-on */
|
||||
{ "control", CPU_CONTROL }, /* Control */
|
||||
{ "features", CPU_FEATURES }, /* Features control */
|
||||
{ "lastbranch", CPU_LBRANCH }, /* Last Branch */
|
||||
{ "bios", CPU_BIOS }, /* BIOS */
|
||||
{ "freq", CPU_FREQ }, /* Frequency */
|
||||
{ "mtrr", CPU_MTRR }, /* MTRR */
|
||||
{ "perf", CPU_PERF }, /* Performance */
|
||||
{ "cache", CPU_CACHE }, /* Cache */
|
||||
{ "sysenter", CPU_SYSENTER }, /* Sysenter */
|
||||
{ "therm", CPU_THERM }, /* Thermal */
|
||||
{ "misc", CPU_MISC }, /* Miscellaneous */
|
||||
{ "debug", CPU_DEBUG }, /* Debug */
|
||||
{ "pat", CPU_PAT }, /* PAT */
|
||||
{ "vmx", CPU_VMX }, /* VMX */
|
||||
{ "call", CPU_CALL }, /* System Call */
|
||||
{ "base", CPU_BASE }, /* BASE Address */
|
||||
{ "smm", CPU_SMM }, /* System mgmt mode */
|
||||
{ "svm", CPU_SVM }, /*Secure Virtial Machine*/
|
||||
{ "osvm", CPU_OSVM }, /* OS-Visible Workaround*/
|
||||
{ "tss", CPU_TSS }, /* Task Stack Segment */
|
||||
{ "cr", CPU_CR }, /* Control Registers */
|
||||
{ "dt", CPU_DT }, /* Descriptor Table */
|
||||
{ "registers", CPU_REG_ALL }, /* Select all Registers */
|
||||
};
|
||||
|
||||
static struct cpu_file_base cpu_file[] = {
|
||||
{ "index", CPU_REG_ALL }, /* index */
|
||||
{ "value", CPU_REG_ALL }, /* value */
|
||||
};
|
||||
|
||||
/* Intel Registers Range */
|
||||
static struct cpu_debug_range cpu_intel_range[] = {
|
||||
{ 0x00000000, 0x00000001, CPU_MC, CPU_INTEL_ALL },
|
||||
{ 0x00000006, 0x00000007, CPU_MONITOR, CPU_CX_AT_XE },
|
||||
{ 0x00000010, 0x00000010, CPU_TIME, CPU_INTEL_ALL },
|
||||
{ 0x00000011, 0x00000013, CPU_PMC, CPU_INTEL_PENTIUM },
|
||||
{ 0x00000017, 0x00000017, CPU_PLATFORM, CPU_PX_CX_AT_XE },
|
||||
{ 0x0000001B, 0x0000001B, CPU_APIC, CPU_P6_CX_AT_XE },
|
||||
|
||||
{ 0x0000002A, 0x0000002A, CPU_POWERON, CPU_PX_CX_AT_XE },
|
||||
{ 0x0000002B, 0x0000002B, CPU_POWERON, CPU_INTEL_XEON },
|
||||
{ 0x0000002C, 0x0000002C, CPU_FREQ, CPU_INTEL_XEON },
|
||||
{ 0x0000003A, 0x0000003A, CPU_CONTROL, CPU_CX_AT_XE },
|
||||
|
||||
{ 0x00000040, 0x00000043, CPU_LBRANCH, CPU_PM_CX_AT_XE },
|
||||
{ 0x00000044, 0x00000047, CPU_LBRANCH, CPU_PM_CO_AT },
|
||||
{ 0x00000060, 0x00000063, CPU_LBRANCH, CPU_C2_AT },
|
||||
{ 0x00000064, 0x00000067, CPU_LBRANCH, CPU_INTEL_ATOM },
|
||||
|
||||
{ 0x00000079, 0x00000079, CPU_BIOS, CPU_P6_CX_AT_XE },
|
||||
{ 0x00000088, 0x0000008A, CPU_CACHE, CPU_INTEL_P6 },
|
||||
{ 0x0000008B, 0x0000008B, CPU_BIOS, CPU_P6_CX_AT_XE },
|
||||
{ 0x0000009B, 0x0000009B, CPU_MONITOR, CPU_INTEL_XEON },
|
||||
|
||||
{ 0x000000C1, 0x000000C2, CPU_PMC, CPU_P6_CX_AT },
|
||||
{ 0x000000CD, 0x000000CD, CPU_FREQ, CPU_CX_AT },
|
||||
{ 0x000000E7, 0x000000E8, CPU_PERF, CPU_CX_AT },
|
||||
{ 0x000000FE, 0x000000FE, CPU_MTRR, CPU_P6_CX_XE },
|
||||
|
||||
{ 0x00000116, 0x00000116, CPU_CACHE, CPU_INTEL_P6 },
|
||||
{ 0x00000118, 0x00000118, CPU_CACHE, CPU_INTEL_P6 },
|
||||
{ 0x00000119, 0x00000119, CPU_CACHE, CPU_INTEL_PX },
|
||||
{ 0x0000011A, 0x0000011B, CPU_CACHE, CPU_INTEL_P6 },
|
||||
{ 0x0000011E, 0x0000011E, CPU_CACHE, CPU_PX_CX_AT },
|
||||
|
||||
{ 0x00000174, 0x00000176, CPU_SYSENTER, CPU_P6_CX_AT_XE },
|
||||
{ 0x00000179, 0x0000017A, CPU_MC, CPU_PX_CX_AT_XE },
|
||||
{ 0x0000017B, 0x0000017B, CPU_MC, CPU_P6_XE },
|
||||
{ 0x00000186, 0x00000187, CPU_PMC, CPU_P6_CX_AT },
|
||||
{ 0x00000198, 0x00000199, CPU_PERF, CPU_PM_CX_AT_XE },
|
||||
{ 0x0000019A, 0x0000019A, CPU_TIME, CPU_PM_CX_AT_XE },
|
||||
{ 0x0000019B, 0x0000019D, CPU_THERM, CPU_PM_CX_AT_XE },
|
||||
{ 0x000001A0, 0x000001A0, CPU_MISC, CPU_PM_CX_AT_XE },
|
||||
|
||||
{ 0x000001C9, 0x000001C9, CPU_LBRANCH, CPU_PM_CX_AT },
|
||||
{ 0x000001D7, 0x000001D8, CPU_LBRANCH, CPU_INTEL_XEON },
|
||||
{ 0x000001D9, 0x000001D9, CPU_DEBUG, CPU_CX_AT_XE },
|
||||
{ 0x000001DA, 0x000001DA, CPU_LBRANCH, CPU_INTEL_XEON },
|
||||
{ 0x000001DB, 0x000001DB, CPU_LBRANCH, CPU_P6_XE },
|
||||
{ 0x000001DC, 0x000001DC, CPU_LBRANCH, CPU_INTEL_P6 },
|
||||
{ 0x000001DD, 0x000001DE, CPU_LBRANCH, CPU_PX_CX_AT_XE },
|
||||
{ 0x000001E0, 0x000001E0, CPU_LBRANCH, CPU_INTEL_P6 },
|
||||
|
||||
{ 0x00000200, 0x0000020F, CPU_MTRR, CPU_P6_CX_XE },
|
||||
{ 0x00000250, 0x00000250, CPU_MTRR, CPU_P6_CX_XE },
|
||||
{ 0x00000258, 0x00000259, CPU_MTRR, CPU_P6_CX_XE },
|
||||
{ 0x00000268, 0x0000026F, CPU_MTRR, CPU_P6_CX_XE },
|
||||
{ 0x00000277, 0x00000277, CPU_PAT, CPU_C2_AT_XE },
|
||||
{ 0x000002FF, 0x000002FF, CPU_MTRR, CPU_P6_CX_XE },
|
||||
|
||||
{ 0x00000300, 0x00000308, CPU_PMC, CPU_INTEL_XEON },
|
||||
{ 0x00000309, 0x0000030B, CPU_PMC, CPU_C2_AT_XE },
|
||||
{ 0x0000030C, 0x00000311, CPU_PMC, CPU_INTEL_XEON },
|
||||
{ 0x00000345, 0x00000345, CPU_PMC, CPU_C2_AT },
|
||||
{ 0x00000360, 0x00000371, CPU_PMC, CPU_INTEL_XEON },
|
||||
{ 0x0000038D, 0x00000390, CPU_PMC, CPU_C2_AT },
|
||||
{ 0x000003A0, 0x000003BE, CPU_PMC, CPU_INTEL_XEON },
|
||||
{ 0x000003C0, 0x000003CD, CPU_PMC, CPU_INTEL_XEON },
|
||||
{ 0x000003E0, 0x000003E1, CPU_PMC, CPU_INTEL_XEON },
|
||||
{ 0x000003F0, 0x000003F0, CPU_PMC, CPU_INTEL_XEON },
|
||||
{ 0x000003F1, 0x000003F1, CPU_PMC, CPU_C2_AT_XE },
|
||||
{ 0x000003F2, 0x000003F2, CPU_PMC, CPU_INTEL_XEON },
|
||||
|
||||
{ 0x00000400, 0x00000402, CPU_MC, CPU_PM_CX_AT_XE },
|
||||
{ 0x00000403, 0x00000403, CPU_MC, CPU_INTEL_XEON },
|
||||
{ 0x00000404, 0x00000406, CPU_MC, CPU_PM_CX_AT_XE },
|
||||
{ 0x00000407, 0x00000407, CPU_MC, CPU_INTEL_XEON },
|
||||
{ 0x00000408, 0x0000040A, CPU_MC, CPU_PM_CX_AT_XE },
|
||||
{ 0x0000040B, 0x0000040B, CPU_MC, CPU_INTEL_XEON },
|
||||
{ 0x0000040C, 0x0000040E, CPU_MC, CPU_PM_CX_XE },
|
||||
{ 0x0000040F, 0x0000040F, CPU_MC, CPU_INTEL_XEON },
|
||||
{ 0x00000410, 0x00000412, CPU_MC, CPU_PM_CX_AT_XE },
|
||||
{ 0x00000413, 0x00000417, CPU_MC, CPU_CX_AT_XE },
|
||||
{ 0x00000480, 0x0000048B, CPU_VMX, CPU_CX_AT_XE },
|
||||
|
||||
{ 0x00000600, 0x00000600, CPU_DEBUG, CPU_PM_CX_AT_XE },
|
||||
{ 0x00000680, 0x0000068F, CPU_LBRANCH, CPU_INTEL_XEON },
|
||||
{ 0x000006C0, 0x000006CF, CPU_LBRANCH, CPU_INTEL_XEON },
|
||||
|
||||
{ 0x000107CC, 0x000107D3, CPU_PMC, CPU_INTEL_XEON_MP },
|
||||
|
||||
{ 0xC0000080, 0xC0000080, CPU_FEATURES, CPU_INTEL_XEON },
|
||||
{ 0xC0000081, 0xC0000082, CPU_CALL, CPU_INTEL_XEON },
|
||||
{ 0xC0000084, 0xC0000084, CPU_CALL, CPU_INTEL_XEON },
|
||||
{ 0xC0000100, 0xC0000102, CPU_BASE, CPU_INTEL_XEON },
|
||||
};
|
||||
|
||||
/* AMD Registers Range */
|
||||
static struct cpu_debug_range cpu_amd_range[] = {
|
||||
{ 0x00000010, 0x00000010, CPU_TIME, CPU_ALL, },
|
||||
{ 0x0000001B, 0x0000001B, CPU_APIC, CPU_ALL, },
|
||||
{ 0x000000FE, 0x000000FE, CPU_MTRR, CPU_ALL, },
|
||||
|
||||
{ 0x00000174, 0x00000176, CPU_SYSENTER, CPU_ALL, },
|
||||
{ 0x00000179, 0x0000017A, CPU_MC, CPU_ALL, },
|
||||
{ 0x0000017B, 0x0000017B, CPU_MC, CPU_ALL, },
|
||||
{ 0x000001D9, 0x000001D9, CPU_DEBUG, CPU_ALL, },
|
||||
{ 0x000001DB, 0x000001DE, CPU_LBRANCH, CPU_ALL, },
|
||||
|
||||
{ 0x00000200, 0x0000020F, CPU_MTRR, CPU_ALL, },
|
||||
{ 0x00000250, 0x00000250, CPU_MTRR, CPU_ALL, },
|
||||
{ 0x00000258, 0x00000259, CPU_MTRR, CPU_ALL, },
|
||||
{ 0x00000268, 0x0000026F, CPU_MTRR, CPU_ALL, },
|
||||
{ 0x00000277, 0x00000277, CPU_PAT, CPU_ALL, },
|
||||
{ 0x000002FF, 0x000002FF, CPU_MTRR, CPU_ALL, },
|
||||
|
||||
{ 0x00000400, 0x00000417, CPU_MC, CPU_ALL, },
|
||||
|
||||
{ 0xC0000080, 0xC0000080, CPU_FEATURES, CPU_ALL, },
|
||||
{ 0xC0000081, 0xC0000084, CPU_CALL, CPU_ALL, },
|
||||
{ 0xC0000100, 0xC0000102, CPU_BASE, CPU_ALL, },
|
||||
{ 0xC0000103, 0xC0000103, CPU_TIME, CPU_ALL, },
|
||||
|
||||
{ 0xC0000408, 0xC000040A, CPU_MC, CPU_ALL, },
|
||||
|
||||
{ 0xc0010000, 0xc0010007, CPU_PMC, CPU_ALL, },
|
||||
{ 0xc0010010, 0xc0010010, CPU_MTRR, CPU_ALL, },
|
||||
{ 0xc0010016, 0xc001001A, CPU_MTRR, CPU_ALL, },
|
||||
{ 0xc001001D, 0xc001001D, CPU_MTRR, CPU_ALL, },
|
||||
{ 0xc0010030, 0xc0010035, CPU_BIOS, CPU_ALL, },
|
||||
{ 0xc0010056, 0xc0010056, CPU_SMM, CPU_ALL, },
|
||||
{ 0xc0010061, 0xc0010063, CPU_SMM, CPU_ALL, },
|
||||
{ 0xc0010074, 0xc0010074, CPU_MC, CPU_ALL, },
|
||||
{ 0xc0010111, 0xc0010113, CPU_SMM, CPU_ALL, },
|
||||
{ 0xc0010114, 0xc0010118, CPU_SVM, CPU_ALL, },
|
||||
{ 0xc0010119, 0xc001011A, CPU_SMM, CPU_ALL, },
|
||||
{ 0xc0010140, 0xc0010141, CPU_OSVM, CPU_ALL, },
|
||||
{ 0xc0010156, 0xc0010156, CPU_SMM, CPU_ALL, },
|
||||
};
|
||||
|
||||
|
||||
static int get_cpu_modelflag(unsigned cpu)
|
||||
{
|
||||
int flag;
|
||||
|
||||
switch (per_cpu(cpu_model, cpu)) {
|
||||
/* Intel */
|
||||
case 0x0501:
|
||||
case 0x0502:
|
||||
case 0x0504:
|
||||
flag = CPU_INTEL_PENTIUM;
|
||||
break;
|
||||
case 0x0601:
|
||||
case 0x0603:
|
||||
case 0x0605:
|
||||
case 0x0607:
|
||||
case 0x0608:
|
||||
case 0x060A:
|
||||
case 0x060B:
|
||||
flag = CPU_INTEL_P6;
|
||||
break;
|
||||
case 0x0609:
|
||||
case 0x060D:
|
||||
flag = CPU_INTEL_PENTIUM_M;
|
||||
break;
|
||||
case 0x060E:
|
||||
flag = CPU_INTEL_CORE;
|
||||
break;
|
||||
case 0x060F:
|
||||
case 0x0617:
|
||||
flag = CPU_INTEL_CORE2;
|
||||
break;
|
||||
case 0x061C:
|
||||
flag = CPU_INTEL_ATOM;
|
||||
break;
|
||||
case 0x0F00:
|
||||
case 0x0F01:
|
||||
case 0x0F02:
|
||||
case 0x0F03:
|
||||
case 0x0F04:
|
||||
flag = CPU_INTEL_XEON_P4;
|
||||
break;
|
||||
case 0x0F06:
|
||||
flag = CPU_INTEL_XEON_MP;
|
||||
break;
|
||||
default:
|
||||
flag = CPU_NONE;
|
||||
break;
|
||||
}
|
||||
|
||||
return flag;
|
||||
}
|
||||
|
||||
static int get_cpu_range_count(unsigned cpu)
|
||||
{
|
||||
int index;
|
||||
|
||||
switch (per_cpu(cpu_model, cpu) >> 16) {
|
||||
case X86_VENDOR_INTEL:
|
||||
index = ARRAY_SIZE(cpu_intel_range);
|
||||
break;
|
||||
case X86_VENDOR_AMD:
|
||||
index = ARRAY_SIZE(cpu_amd_range);
|
||||
break;
|
||||
default:
|
||||
index = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
return index;
|
||||
}
|
||||
|
||||
static int is_typeflag_valid(unsigned cpu, unsigned flag)
|
||||
{
|
||||
unsigned vendor, modelflag;
|
||||
int i, index;
|
||||
|
||||
/* Standard Registers should be always valid */
|
||||
if (flag >= CPU_TSS)
|
||||
return 1;
|
||||
|
||||
modelflag = per_cpu(cpu_modelflag, cpu);
|
||||
vendor = per_cpu(cpu_model, cpu) >> 16;
|
||||
index = get_cpu_range_count(cpu);
|
||||
|
||||
for (i = 0; i < index; i++) {
|
||||
switch (vendor) {
|
||||
case X86_VENDOR_INTEL:
|
||||
if ((cpu_intel_range[i].model & modelflag) &&
|
||||
(cpu_intel_range[i].flag & flag))
|
||||
return 1;
|
||||
break;
|
||||
case X86_VENDOR_AMD:
|
||||
if (cpu_amd_range[i].flag & flag)
|
||||
return 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Invalid */
|
||||
return 0;
|
||||
}
|
||||
|
||||
static unsigned get_cpu_range(unsigned cpu, unsigned *min, unsigned *max,
|
||||
int index, unsigned flag)
|
||||
{
|
||||
unsigned modelflag;
|
||||
|
||||
modelflag = per_cpu(cpu_modelflag, cpu);
|
||||
*max = 0;
|
||||
switch (per_cpu(cpu_model, cpu) >> 16) {
|
||||
case X86_VENDOR_INTEL:
|
||||
if ((cpu_intel_range[index].model & modelflag) &&
|
||||
(cpu_intel_range[index].flag & flag)) {
|
||||
*min = cpu_intel_range[index].min;
|
||||
*max = cpu_intel_range[index].max;
|
||||
}
|
||||
break;
|
||||
case X86_VENDOR_AMD:
|
||||
if (cpu_amd_range[index].flag & flag) {
|
||||
*min = cpu_amd_range[index].min;
|
||||
*max = cpu_amd_range[index].max;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
return *max;
|
||||
}
|
||||
|
||||
/* This function can also be called with seq = NULL for printk */
|
||||
static void print_cpu_data(struct seq_file *seq, unsigned type,
|
||||
u32 low, u32 high)
|
||||
{
|
||||
struct cpu_private *priv;
|
||||
u64 val = high;
|
||||
|
||||
if (seq) {
|
||||
priv = seq->private;
|
||||
if (priv->file) {
|
||||
val = (val << 32) | low;
|
||||
seq_printf(seq, "0x%llx\n", val);
|
||||
} else
|
||||
seq_printf(seq, " %08x: %08x_%08x\n",
|
||||
type, high, low);
|
||||
} else
|
||||
printk(KERN_INFO " %08x: %08x_%08x\n", type, high, low);
|
||||
}
|
||||
|
||||
/* This function can also be called with seq = NULL for printk */
|
||||
static void print_msr(struct seq_file *seq, unsigned cpu, unsigned flag)
|
||||
{
|
||||
unsigned msr, msr_min, msr_max;
|
||||
struct cpu_private *priv;
|
||||
u32 low, high;
|
||||
int i, range;
|
||||
|
||||
if (seq) {
|
||||
priv = seq->private;
|
||||
if (priv->file) {
|
||||
if (!rdmsr_safe_on_cpu(priv->cpu, priv->reg,
|
||||
&low, &high))
|
||||
print_cpu_data(seq, priv->reg, low, high);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
range = get_cpu_range_count(cpu);
|
||||
|
||||
for (i = 0; i < range; i++) {
|
||||
if (!get_cpu_range(cpu, &msr_min, &msr_max, i, flag))
|
||||
continue;
|
||||
|
||||
for (msr = msr_min; msr <= msr_max; msr++) {
|
||||
if (rdmsr_safe_on_cpu(cpu, msr, &low, &high))
|
||||
continue;
|
||||
print_cpu_data(seq, msr, low, high);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void print_tss(void *arg)
|
||||
{
|
||||
struct pt_regs *regs = task_pt_regs(current);
|
||||
struct seq_file *seq = arg;
|
||||
unsigned int seg;
|
||||
|
||||
seq_printf(seq, " RAX\t: %016lx\n", regs->ax);
|
||||
seq_printf(seq, " RBX\t: %016lx\n", regs->bx);
|
||||
seq_printf(seq, " RCX\t: %016lx\n", regs->cx);
|
||||
seq_printf(seq, " RDX\t: %016lx\n", regs->dx);
|
||||
|
||||
seq_printf(seq, " RSI\t: %016lx\n", regs->si);
|
||||
seq_printf(seq, " RDI\t: %016lx\n", regs->di);
|
||||
seq_printf(seq, " RBP\t: %016lx\n", regs->bp);
|
||||
seq_printf(seq, " ESP\t: %016lx\n", regs->sp);
|
||||
|
||||
#ifdef CONFIG_X86_64
|
||||
seq_printf(seq, " R08\t: %016lx\n", regs->r8);
|
||||
seq_printf(seq, " R09\t: %016lx\n", regs->r9);
|
||||
seq_printf(seq, " R10\t: %016lx\n", regs->r10);
|
||||
seq_printf(seq, " R11\t: %016lx\n", regs->r11);
|
||||
seq_printf(seq, " R12\t: %016lx\n", regs->r12);
|
||||
seq_printf(seq, " R13\t: %016lx\n", regs->r13);
|
||||
seq_printf(seq, " R14\t: %016lx\n", regs->r14);
|
||||
seq_printf(seq, " R15\t: %016lx\n", regs->r15);
|
||||
#endif
|
||||
|
||||
asm("movl %%cs,%0" : "=r" (seg));
|
||||
seq_printf(seq, " CS\t: %04x\n", seg);
|
||||
asm("movl %%ds,%0" : "=r" (seg));
|
||||
seq_printf(seq, " DS\t: %04x\n", seg);
|
||||
seq_printf(seq, " SS\t: %04lx\n", regs->ss & 0xffff);
|
||||
asm("movl %%es,%0" : "=r" (seg));
|
||||
seq_printf(seq, " ES\t: %04x\n", seg);
|
||||
asm("movl %%fs,%0" : "=r" (seg));
|
||||
seq_printf(seq, " FS\t: %04x\n", seg);
|
||||
asm("movl %%gs,%0" : "=r" (seg));
|
||||
seq_printf(seq, " GS\t: %04x\n", seg);
|
||||
|
||||
seq_printf(seq, " EFLAGS\t: %016lx\n", regs->flags);
|
||||
|
||||
seq_printf(seq, " EIP\t: %016lx\n", regs->ip);
|
||||
}
|
||||
|
||||
static void print_cr(void *arg)
|
||||
{
|
||||
struct seq_file *seq = arg;
|
||||
|
||||
seq_printf(seq, " cr0\t: %016lx\n", read_cr0());
|
||||
seq_printf(seq, " cr2\t: %016lx\n", read_cr2());
|
||||
seq_printf(seq, " cr3\t: %016lx\n", read_cr3());
|
||||
seq_printf(seq, " cr4\t: %016lx\n", read_cr4_safe());
|
||||
#ifdef CONFIG_X86_64
|
||||
seq_printf(seq, " cr8\t: %016lx\n", read_cr8());
|
||||
#endif
|
||||
}
|
||||
|
||||
static void print_desc_ptr(char *str, struct seq_file *seq, struct desc_ptr dt)
|
||||
{
|
||||
seq_printf(seq, " %s\t: %016llx\n", str, (u64)(dt.address | dt.size));
|
||||
}
|
||||
|
||||
static void print_dt(void *seq)
|
||||
{
|
||||
struct desc_ptr dt;
|
||||
unsigned long ldt;
|
||||
|
||||
/* IDT */
|
||||
store_idt((struct desc_ptr *)&dt);
|
||||
print_desc_ptr("IDT", seq, dt);
|
||||
|
||||
/* GDT */
|
||||
store_gdt((struct desc_ptr *)&dt);
|
||||
print_desc_ptr("GDT", seq, dt);
|
||||
|
||||
/* LDT */
|
||||
store_ldt(ldt);
|
||||
seq_printf(seq, " LDT\t: %016lx\n", ldt);
|
||||
|
||||
/* TR */
|
||||
store_tr(ldt);
|
||||
seq_printf(seq, " TR\t: %016lx\n", ldt);
|
||||
}
|
||||
|
||||
static void print_dr(void *arg)
|
||||
{
|
||||
struct seq_file *seq = arg;
|
||||
unsigned long dr;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < 8; i++) {
|
||||
/* Ignore db4, db5 */
|
||||
if ((i == 4) || (i == 5))
|
||||
continue;
|
||||
get_debugreg(dr, i);
|
||||
seq_printf(seq, " dr%d\t: %016lx\n", i, dr);
|
||||
}
|
||||
|
||||
seq_printf(seq, "\n MSR\t:\n");
|
||||
}
|
||||
|
||||
static void print_apic(void *arg)
|
||||
{
|
||||
struct seq_file *seq = arg;
|
||||
|
||||
#ifdef CONFIG_X86_LOCAL_APIC
|
||||
seq_printf(seq, " LAPIC\t:\n");
|
||||
seq_printf(seq, " ID\t\t: %08x\n", apic_read(APIC_ID) >> 24);
|
||||
seq_printf(seq, " LVR\t\t: %08x\n", apic_read(APIC_LVR));
|
||||
seq_printf(seq, " TASKPRI\t: %08x\n", apic_read(APIC_TASKPRI));
|
||||
seq_printf(seq, " ARBPRI\t\t: %08x\n", apic_read(APIC_ARBPRI));
|
||||
seq_printf(seq, " PROCPRI\t: %08x\n", apic_read(APIC_PROCPRI));
|
||||
seq_printf(seq, " LDR\t\t: %08x\n", apic_read(APIC_LDR));
|
||||
seq_printf(seq, " DFR\t\t: %08x\n", apic_read(APIC_DFR));
|
||||
seq_printf(seq, " SPIV\t\t: %08x\n", apic_read(APIC_SPIV));
|
||||
seq_printf(seq, " ISR\t\t: %08x\n", apic_read(APIC_ISR));
|
||||
seq_printf(seq, " ESR\t\t: %08x\n", apic_read(APIC_ESR));
|
||||
seq_printf(seq, " ICR\t\t: %08x\n", apic_read(APIC_ICR));
|
||||
seq_printf(seq, " ICR2\t\t: %08x\n", apic_read(APIC_ICR2));
|
||||
seq_printf(seq, " LVTT\t\t: %08x\n", apic_read(APIC_LVTT));
|
||||
seq_printf(seq, " LVTTHMR\t: %08x\n", apic_read(APIC_LVTTHMR));
|
||||
seq_printf(seq, " LVTPC\t\t: %08x\n", apic_read(APIC_LVTPC));
|
||||
seq_printf(seq, " LVT0\t\t: %08x\n", apic_read(APIC_LVT0));
|
||||
seq_printf(seq, " LVT1\t\t: %08x\n", apic_read(APIC_LVT1));
|
||||
seq_printf(seq, " LVTERR\t\t: %08x\n", apic_read(APIC_LVTERR));
|
||||
seq_printf(seq, " TMICT\t\t: %08x\n", apic_read(APIC_TMICT));
|
||||
seq_printf(seq, " TMCCT\t\t: %08x\n", apic_read(APIC_TMCCT));
|
||||
seq_printf(seq, " TDCR\t\t: %08x\n", apic_read(APIC_TDCR));
|
||||
#endif /* CONFIG_X86_LOCAL_APIC */
|
||||
|
||||
seq_printf(seq, "\n MSR\t:\n");
|
||||
}
|
||||
|
||||
static int cpu_seq_show(struct seq_file *seq, void *v)
|
||||
{
|
||||
struct cpu_private *priv = seq->private;
|
||||
|
||||
if (priv == NULL)
|
||||
return -EINVAL;
|
||||
|
||||
switch (cpu_base[priv->type].flag) {
|
||||
case CPU_TSS:
|
||||
smp_call_function_single(priv->cpu, print_tss, seq, 1);
|
||||
break;
|
||||
case CPU_CR:
|
||||
smp_call_function_single(priv->cpu, print_cr, seq, 1);
|
||||
break;
|
||||
case CPU_DT:
|
||||
smp_call_function_single(priv->cpu, print_dt, seq, 1);
|
||||
break;
|
||||
case CPU_DEBUG:
|
||||
if (priv->file == CPU_INDEX_BIT)
|
||||
smp_call_function_single(priv->cpu, print_dr, seq, 1);
|
||||
print_msr(seq, priv->cpu, cpu_base[priv->type].flag);
|
||||
break;
|
||||
case CPU_APIC:
|
||||
if (priv->file == CPU_INDEX_BIT)
|
||||
smp_call_function_single(priv->cpu, print_apic, seq, 1);
|
||||
print_msr(seq, priv->cpu, cpu_base[priv->type].flag);
|
||||
break;
|
||||
|
||||
default:
|
||||
print_msr(seq, priv->cpu, cpu_base[priv->type].flag);
|
||||
break;
|
||||
}
|
||||
seq_printf(seq, "\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void *cpu_seq_start(struct seq_file *seq, loff_t *pos)
|
||||
{
|
||||
if (*pos == 0) /* One time is enough ;-) */
|
||||
return seq;
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void *cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
||||
{
|
||||
(*pos)++;
|
||||
|
||||
return cpu_seq_start(seq, pos);
|
||||
}
|
||||
|
||||
static void cpu_seq_stop(struct seq_file *seq, void *v)
|
||||
{
|
||||
}
|
||||
|
||||
static const struct seq_operations cpu_seq_ops = {
|
||||
.start = cpu_seq_start,
|
||||
.next = cpu_seq_next,
|
||||
.stop = cpu_seq_stop,
|
||||
.show = cpu_seq_show,
|
||||
};
|
||||
|
||||
static int cpu_seq_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
struct cpu_private *priv = inode->i_private;
|
||||
struct seq_file *seq;
|
||||
int err;
|
||||
|
||||
err = seq_open(file, &cpu_seq_ops);
|
||||
if (!err) {
|
||||
seq = file->private_data;
|
||||
seq->private = priv;
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static const struct file_operations cpu_fops = {
|
||||
.open = cpu_seq_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = seq_release,
|
||||
};
|
||||
|
||||
static int cpu_create_file(unsigned cpu, unsigned type, unsigned reg,
|
||||
unsigned file, struct dentry *dentry)
|
||||
{
|
||||
struct cpu_private *priv = NULL;
|
||||
|
||||
/* Already intialized */
|
||||
if (file == CPU_INDEX_BIT)
|
||||
if (per_cpu(cpu_arr[type].init, cpu))
|
||||
return 0;
|
||||
|
||||
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
||||
if (priv == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
priv->cpu = cpu;
|
||||
priv->type = type;
|
||||
priv->reg = reg;
|
||||
priv->file = file;
|
||||
mutex_lock(&cpu_debug_lock);
|
||||
per_cpu(priv_arr[type], cpu) = priv;
|
||||
per_cpu(cpu_priv_count, cpu)++;
|
||||
mutex_unlock(&cpu_debug_lock);
|
||||
|
||||
if (file)
|
||||
debugfs_create_file(cpu_file[file].name, S_IRUGO,
|
||||
dentry, (void *)priv, &cpu_fops);
|
||||
else {
|
||||
debugfs_create_file(cpu_base[type].name, S_IRUGO,
|
||||
per_cpu(cpu_arr[type].dentry, cpu),
|
||||
(void *)priv, &cpu_fops);
|
||||
mutex_lock(&cpu_debug_lock);
|
||||
per_cpu(cpu_arr[type].init, cpu) = 1;
|
||||
mutex_unlock(&cpu_debug_lock);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int cpu_init_regfiles(unsigned cpu, unsigned int type, unsigned reg,
|
||||
struct dentry *dentry)
|
||||
{
|
||||
unsigned file;
|
||||
int err = 0;
|
||||
|
||||
for (file = 0; file < ARRAY_SIZE(cpu_file); file++) {
|
||||
err = cpu_create_file(cpu, type, reg, file, dentry);
|
||||
if (err)
|
||||
return err;
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int cpu_init_msr(unsigned cpu, unsigned type, struct dentry *dentry)
|
||||
{
|
||||
struct dentry *cpu_dentry = NULL;
|
||||
unsigned reg, reg_min, reg_max;
|
||||
int i, range, err = 0;
|
||||
char reg_dir[12];
|
||||
u32 low, high;
|
||||
|
||||
range = get_cpu_range_count(cpu);
|
||||
|
||||
for (i = 0; i < range; i++) {
|
||||
if (!get_cpu_range(cpu, ®_min, ®_max, i,
|
||||
cpu_base[type].flag))
|
||||
continue;
|
||||
|
||||
for (reg = reg_min; reg <= reg_max; reg++) {
|
||||
if (rdmsr_safe_on_cpu(cpu, reg, &low, &high))
|
||||
continue;
|
||||
|
||||
sprintf(reg_dir, "0x%x", reg);
|
||||
cpu_dentry = debugfs_create_dir(reg_dir, dentry);
|
||||
err = cpu_init_regfiles(cpu, type, reg, cpu_dentry);
|
||||
if (err)
|
||||
return err;
|
||||
}
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int cpu_init_allreg(unsigned cpu, struct dentry *dentry)
|
||||
{
|
||||
struct dentry *cpu_dentry = NULL;
|
||||
unsigned type;
|
||||
int err = 0;
|
||||
|
||||
for (type = 0; type < ARRAY_SIZE(cpu_base) - 1; type++) {
|
||||
if (!is_typeflag_valid(cpu, cpu_base[type].flag))
|
||||
continue;
|
||||
cpu_dentry = debugfs_create_dir(cpu_base[type].name, dentry);
|
||||
per_cpu(cpu_arr[type].dentry, cpu) = cpu_dentry;
|
||||
|
||||
if (type < CPU_TSS_BIT)
|
||||
err = cpu_init_msr(cpu, type, cpu_dentry);
|
||||
else
|
||||
err = cpu_create_file(cpu, type, 0, CPU_INDEX_BIT,
|
||||
cpu_dentry);
|
||||
if (err)
|
||||
return err;
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int cpu_init_cpu(void)
|
||||
{
|
||||
struct dentry *cpu_dentry = NULL;
|
||||
struct cpuinfo_x86 *cpui;
|
||||
char cpu_dir[12];
|
||||
unsigned cpu;
|
||||
int err = 0;
|
||||
|
||||
for (cpu = 0; cpu < nr_cpu_ids; cpu++) {
|
||||
cpui = &cpu_data(cpu);
|
||||
if (!cpu_has(cpui, X86_FEATURE_MSR))
|
||||
continue;
|
||||
per_cpu(cpu_model, cpu) = ((cpui->x86_vendor << 16) |
|
||||
(cpui->x86 << 8) |
|
||||
(cpui->x86_model));
|
||||
per_cpu(cpu_modelflag, cpu) = get_cpu_modelflag(cpu);
|
||||
|
||||
sprintf(cpu_dir, "cpu%d", cpu);
|
||||
cpu_dentry = debugfs_create_dir(cpu_dir, cpu_debugfs_dir);
|
||||
err = cpu_init_allreg(cpu, cpu_dentry);
|
||||
|
||||
pr_info("cpu%d(%d) debug files %d\n",
|
||||
cpu, nr_cpu_ids, per_cpu(cpu_priv_count, cpu));
|
||||
if (per_cpu(cpu_priv_count, cpu) > MAX_CPU_FILES) {
|
||||
pr_err("Register files count %d exceeds limit %d\n",
|
||||
per_cpu(cpu_priv_count, cpu), MAX_CPU_FILES);
|
||||
per_cpu(cpu_priv_count, cpu) = MAX_CPU_FILES;
|
||||
err = -ENFILE;
|
||||
}
|
||||
if (err)
|
||||
return err;
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __init cpu_debug_init(void)
|
||||
{
|
||||
cpu_debugfs_dir = debugfs_create_dir("cpu", arch_debugfs_dir);
|
||||
|
||||
return cpu_init_cpu();
|
||||
}
|
||||
|
||||
static void __exit cpu_debug_exit(void)
|
||||
{
|
||||
int i, cpu;
|
||||
|
||||
if (cpu_debugfs_dir)
|
||||
debugfs_remove_recursive(cpu_debugfs_dir);
|
||||
|
||||
for (cpu = 0; cpu < nr_cpu_ids; cpu++)
|
||||
for (i = 0; i < per_cpu(cpu_priv_count, cpu); i++)
|
||||
kfree(per_cpu(priv_arr[i], cpu));
|
||||
}
|
||||
|
||||
module_init(cpu_debug_init);
|
||||
module_exit(cpu_debug_exit);
|
||||
|
||||
MODULE_AUTHOR("Jaswinder Singh Rajput");
|
||||
MODULE_DESCRIPTION("CPU Debug module");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -639,7 +639,7 @@ static void mce_init_timer(void)
|
|||
if (!next_interval)
|
||||
return;
|
||||
setup_timer(t, mcheck_timer, smp_processor_id());
|
||||
t->expires = round_jiffies_relative(jiffies + next_interval);
|
||||
t->expires = round_jiffies(jiffies + next_interval);
|
||||
add_timer(t);
|
||||
}
|
||||
|
||||
|
|
@ -1110,7 +1110,7 @@ static int __cpuinit mce_cpu_callback(struct notifier_block *nfb,
|
|||
break;
|
||||
case CPU_DOWN_FAILED:
|
||||
case CPU_DOWN_FAILED_FROZEN:
|
||||
t->expires = round_jiffies_relative(jiffies + next_interval);
|
||||
t->expires = round_jiffies(jiffies + next_interval);
|
||||
add_timer_on(t, cpu);
|
||||
smp_call_function_single(cpu, mce_reenable_cpu, &action, 1);
|
||||
break;
|
||||
|
|
|
|||
|
|
@ -442,8 +442,7 @@ sysenter_past_esp:
|
|||
|
||||
GET_THREAD_INFO(%ebp)
|
||||
|
||||
/* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
|
||||
testw $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp)
|
||||
testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp)
|
||||
jnz sysenter_audit
|
||||
sysenter_do_call:
|
||||
cmpl $(nr_syscalls), %eax
|
||||
|
|
@ -454,7 +453,7 @@ sysenter_do_call:
|
|||
DISABLE_INTERRUPTS(CLBR_ANY)
|
||||
TRACE_IRQS_OFF
|
||||
movl TI_flags(%ebp), %ecx
|
||||
testw $_TIF_ALLWORK_MASK, %cx
|
||||
testl $_TIF_ALLWORK_MASK, %ecx
|
||||
jne sysexit_audit
|
||||
sysenter_exit:
|
||||
/* if something modifies registers it must also disable sysexit */
|
||||
|
|
@ -468,7 +467,7 @@ sysenter_exit:
|
|||
|
||||
#ifdef CONFIG_AUDITSYSCALL
|
||||
sysenter_audit:
|
||||
testw $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
|
||||
testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%ebp)
|
||||
jnz syscall_trace_entry
|
||||
addl $4,%esp
|
||||
CFI_ADJUST_CFA_OFFSET -4
|
||||
|
|
@ -485,7 +484,7 @@ sysenter_audit:
|
|||
jmp sysenter_do_call
|
||||
|
||||
sysexit_audit:
|
||||
testw $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %cx
|
||||
testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %ecx
|
||||
jne syscall_exit_work
|
||||
TRACE_IRQS_ON
|
||||
ENABLE_INTERRUPTS(CLBR_ANY)
|
||||
|
|
@ -498,7 +497,7 @@ sysexit_audit:
|
|||
DISABLE_INTERRUPTS(CLBR_ANY)
|
||||
TRACE_IRQS_OFF
|
||||
movl TI_flags(%ebp), %ecx
|
||||
testw $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %cx
|
||||
testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %ecx
|
||||
jne syscall_exit_work
|
||||
movl PT_EAX(%esp),%eax /* reload syscall return value */
|
||||
jmp sysenter_exit
|
||||
|
|
@ -523,8 +522,7 @@ ENTRY(system_call)
|
|||
SAVE_ALL
|
||||
GET_THREAD_INFO(%ebp)
|
||||
# system call tracing in operation / emulation
|
||||
/* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */
|
||||
testw $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp)
|
||||
testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp)
|
||||
jnz syscall_trace_entry
|
||||
cmpl $(nr_syscalls), %eax
|
||||
jae syscall_badsys
|
||||
|
|
@ -538,7 +536,7 @@ syscall_exit:
|
|||
# between sampling and the iret
|
||||
TRACE_IRQS_OFF
|
||||
movl TI_flags(%ebp), %ecx
|
||||
testw $_TIF_ALLWORK_MASK, %cx # current->work
|
||||
testl $_TIF_ALLWORK_MASK, %ecx # current->work
|
||||
jne syscall_exit_work
|
||||
|
||||
restore_all:
|
||||
|
|
@ -673,7 +671,7 @@ END(syscall_trace_entry)
|
|||
# perform syscall exit tracing
|
||||
ALIGN
|
||||
syscall_exit_work:
|
||||
testb $_TIF_WORK_SYSCALL_EXIT, %cl
|
||||
testl $_TIF_WORK_SYSCALL_EXIT, %ecx
|
||||
jz work_pending
|
||||
TRACE_IRQS_ON
|
||||
ENABLE_INTERRUPTS(CLBR_ANY) # could let syscall_trace_leave() call
|
||||
|
|
|
|||
|
|
@ -368,6 +368,7 @@ ENTRY(save_rest)
|
|||
END(save_rest)
|
||||
|
||||
/* save complete stack frame */
|
||||
.pushsection .kprobes.text, "ax"
|
||||
ENTRY(save_paranoid)
|
||||
XCPT_FRAME 1 RDI+8
|
||||
cld
|
||||
|
|
@ -396,6 +397,7 @@ ENTRY(save_paranoid)
|
|||
1: ret
|
||||
CFI_ENDPROC
|
||||
END(save_paranoid)
|
||||
.popsection
|
||||
|
||||
/*
|
||||
* A newly forked process directly context switches into this address.
|
||||
|
|
@ -416,7 +418,6 @@ ENTRY(ret_from_fork)
|
|||
|
||||
GET_THREAD_INFO(%rcx)
|
||||
|
||||
CFI_REMEMBER_STATE
|
||||
RESTORE_REST
|
||||
|
||||
testl $3, CS-ARGOFFSET(%rsp) # from kernel_thread?
|
||||
|
|
@ -428,7 +429,6 @@ ENTRY(ret_from_fork)
|
|||
RESTORE_TOP_OF_STACK %rdi, -ARGOFFSET
|
||||
jmp ret_from_sys_call # go to the SYSRET fastpath
|
||||
|
||||
CFI_RESTORE_STATE
|
||||
CFI_ENDPROC
|
||||
END(ret_from_fork)
|
||||
|
||||
|
|
|
|||
|
|
@ -14,12 +14,12 @@
|
|||
#include <linux/ftrace.h>
|
||||
#include <linux/suspend.h>
|
||||
#include <linux/gfp.h>
|
||||
#include <linux/io.h>
|
||||
|
||||
#include <asm/pgtable.h>
|
||||
#include <asm/pgalloc.h>
|
||||
#include <asm/tlbflush.h>
|
||||
#include <asm/mmu_context.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/apic.h>
|
||||
#include <asm/cpufeature.h>
|
||||
#include <asm/desc.h>
|
||||
|
|
@ -63,7 +63,7 @@ static void load_segments(void)
|
|||
"\tmovl %%eax,%%fs\n"
|
||||
"\tmovl %%eax,%%gs\n"
|
||||
"\tmovl %%eax,%%ss\n"
|
||||
::: "eax", "memory");
|
||||
: : : "eax", "memory");
|
||||
#undef STR
|
||||
#undef __STR
|
||||
}
|
||||
|
|
@ -205,7 +205,8 @@ void machine_kexec(struct kimage *image)
|
|||
|
||||
if (image->preserve_context) {
|
||||
#ifdef CONFIG_X86_IO_APIC
|
||||
/* We need to put APICs in legacy mode so that we can
|
||||
/*
|
||||
* We need to put APICs in legacy mode so that we can
|
||||
* get timer interrupts in second kernel. kexec/kdump
|
||||
* paths already have calls to disable_IO_APIC() in
|
||||
* one form or other. kexec jump path also need
|
||||
|
|
@ -227,7 +228,8 @@ void machine_kexec(struct kimage *image)
|
|||
page_list[PA_SWAP_PAGE] = (page_to_pfn(image->swap_page)
|
||||
<< PAGE_SHIFT);
|
||||
|
||||
/* The segment registers are funny things, they have both a
|
||||
/*
|
||||
* The segment registers are funny things, they have both a
|
||||
* visible and an invisible part. Whenever the visible part is
|
||||
* set to a specific selector, the invisible part is loaded
|
||||
* with from a table in memory. At no other time is the
|
||||
|
|
@ -237,11 +239,12 @@ void machine_kexec(struct kimage *image)
|
|||
* segments, before I zap the gdt with an invalid value.
|
||||
*/
|
||||
load_segments();
|
||||
/* The gdt & idt are now invalid.
|
||||
/*
|
||||
* The gdt & idt are now invalid.
|
||||
* If you want to load them you must set up your own idt & gdt.
|
||||
*/
|
||||
set_gdt(phys_to_virt(0),0);
|
||||
set_idt(phys_to_virt(0),0);
|
||||
set_gdt(phys_to_virt(0), 0);
|
||||
set_idt(phys_to_virt(0), 0);
|
||||
|
||||
/* now call it */
|
||||
image->start = relocate_kernel_ptr((unsigned long)image->head,
|
||||
|
|
|
|||
|
|
@ -12,11 +12,47 @@
|
|||
#include <linux/reboot.h>
|
||||
#include <linux/numa.h>
|
||||
#include <linux/ftrace.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/suspend.h>
|
||||
|
||||
#include <asm/pgtable.h>
|
||||
#include <asm/tlbflush.h>
|
||||
#include <asm/mmu_context.h>
|
||||
#include <asm/io.h>
|
||||
|
||||
static int init_one_level2_page(struct kimage *image, pgd_t *pgd,
|
||||
unsigned long addr)
|
||||
{
|
||||
pud_t *pud;
|
||||
pmd_t *pmd;
|
||||
struct page *page;
|
||||
int result = -ENOMEM;
|
||||
|
||||
addr &= PMD_MASK;
|
||||
pgd += pgd_index(addr);
|
||||
if (!pgd_present(*pgd)) {
|
||||
page = kimage_alloc_control_pages(image, 0);
|
||||
if (!page)
|
||||
goto out;
|
||||
pud = (pud_t *)page_address(page);
|
||||
memset(pud, 0, PAGE_SIZE);
|
||||
set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE));
|
||||
}
|
||||
pud = pud_offset(pgd, addr);
|
||||
if (!pud_present(*pud)) {
|
||||
page = kimage_alloc_control_pages(image, 0);
|
||||
if (!page)
|
||||
goto out;
|
||||
pmd = (pmd_t *)page_address(page);
|
||||
memset(pmd, 0, PAGE_SIZE);
|
||||
set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE));
|
||||
}
|
||||
pmd = pmd_offset(pud, addr);
|
||||
if (!pmd_present(*pmd))
|
||||
set_pmd(pmd, __pmd(addr | __PAGE_KERNEL_LARGE_EXEC));
|
||||
result = 0;
|
||||
out:
|
||||
return result;
|
||||
}
|
||||
|
||||
static void init_level2_page(pmd_t *level2p, unsigned long addr)
|
||||
{
|
||||
|
|
@ -83,9 +119,8 @@ static int init_level4_page(struct kimage *image, pgd_t *level4p,
|
|||
}
|
||||
level3p = (pud_t *)page_address(page);
|
||||
result = init_level3_page(image, level3p, addr, last_addr);
|
||||
if (result) {
|
||||
if (result)
|
||||
goto out;
|
||||
}
|
||||
set_pgd(level4p++, __pgd(__pa(level3p) | _KERNPG_TABLE));
|
||||
addr += PGDIR_SIZE;
|
||||
}
|
||||
|
|
@ -154,6 +189,13 @@ static int init_pgtable(struct kimage *image, unsigned long start_pgtable)
|
|||
int result;
|
||||
level4p = (pgd_t *)__va(start_pgtable);
|
||||
result = init_level4_page(image, level4p, 0, max_pfn << PAGE_SHIFT);
|
||||
if (result)
|
||||
return result;
|
||||
/*
|
||||
* image->start may be outside 0 ~ max_pfn, for example when
|
||||
* jump back to original kernel from kexeced kernel
|
||||
*/
|
||||
result = init_one_level2_page(image, level4p, image->start);
|
||||
if (result)
|
||||
return result;
|
||||
return init_transition_pgtable(image, level4p);
|
||||
|
|
@ -229,20 +271,45 @@ void machine_kexec(struct kimage *image)
|
|||
{
|
||||
unsigned long page_list[PAGES_NR];
|
||||
void *control_page;
|
||||
int save_ftrace_enabled;
|
||||
|
||||
tracer_disable();
|
||||
#ifdef CONFIG_KEXEC_JUMP
|
||||
if (kexec_image->preserve_context)
|
||||
save_processor_state();
|
||||
#endif
|
||||
|
||||
save_ftrace_enabled = __ftrace_enabled_save();
|
||||
|
||||
/* Interrupts aren't acceptable while we reboot */
|
||||
local_irq_disable();
|
||||
|
||||
if (image->preserve_context) {
|
||||
#ifdef CONFIG_X86_IO_APIC
|
||||
/*
|
||||
* We need to put APICs in legacy mode so that we can
|
||||
* get timer interrupts in second kernel. kexec/kdump
|
||||
* paths already have calls to disable_IO_APIC() in
|
||||
* one form or other. kexec jump path also need
|
||||
* one.
|
||||
*/
|
||||
disable_IO_APIC();
|
||||
#endif
|
||||
}
|
||||
|
||||
control_page = page_address(image->control_code_page) + PAGE_SIZE;
|
||||
memcpy(control_page, relocate_kernel, PAGE_SIZE);
|
||||
memcpy(control_page, relocate_kernel, KEXEC_CONTROL_CODE_MAX_SIZE);
|
||||
|
||||
page_list[PA_CONTROL_PAGE] = virt_to_phys(control_page);
|
||||
page_list[VA_CONTROL_PAGE] = (unsigned long)control_page;
|
||||
page_list[PA_TABLE_PAGE] =
|
||||
(unsigned long)__pa(page_address(image->control_code_page));
|
||||
|
||||
/* The segment registers are funny things, they have both a
|
||||
if (image->type == KEXEC_TYPE_DEFAULT)
|
||||
page_list[PA_SWAP_PAGE] = (page_to_pfn(image->swap_page)
|
||||
<< PAGE_SHIFT);
|
||||
|
||||
/*
|
||||
* The segment registers are funny things, they have both a
|
||||
* visible and an invisible part. Whenever the visible part is
|
||||
* set to a specific selector, the invisible part is loaded
|
||||
* with from a table in memory. At no other time is the
|
||||
|
|
@ -252,15 +319,25 @@ void machine_kexec(struct kimage *image)
|
|||
* segments, before I zap the gdt with an invalid value.
|
||||
*/
|
||||
load_segments();
|
||||
/* The gdt & idt are now invalid.
|
||||
/*
|
||||
* The gdt & idt are now invalid.
|
||||
* If you want to load them you must set up your own idt & gdt.
|
||||
*/
|
||||
set_gdt(phys_to_virt(0),0);
|
||||
set_idt(phys_to_virt(0),0);
|
||||
set_gdt(phys_to_virt(0), 0);
|
||||
set_idt(phys_to_virt(0), 0);
|
||||
|
||||
/* now call it */
|
||||
relocate_kernel((unsigned long)image->head, (unsigned long)page_list,
|
||||
image->start);
|
||||
image->start = relocate_kernel((unsigned long)image->head,
|
||||
(unsigned long)page_list,
|
||||
image->start,
|
||||
image->preserve_context);
|
||||
|
||||
#ifdef CONFIG_KEXEC_JUMP
|
||||
if (kexec_image->preserve_context)
|
||||
restore_processor_state();
|
||||
#endif
|
||||
|
||||
__ftrace_enabled_restore(save_ftrace_enabled);
|
||||
}
|
||||
|
||||
void arch_crash_save_vmcoreinfo(void)
|
||||
|
|
|
|||
|
|
@ -74,8 +74,7 @@ static void ich_force_hpet_resume(void)
|
|||
if (!force_hpet_address)
|
||||
return;
|
||||
|
||||
if (rcba_base == NULL)
|
||||
BUG();
|
||||
BUG_ON(rcba_base == NULL);
|
||||
|
||||
/* read the Function Disable register, dword mode only */
|
||||
val = readl(rcba_base + 0x3404);
|
||||
|
|
|
|||
|
|
@ -17,7 +17,8 @@
|
|||
|
||||
#define PTR(x) (x << 2)
|
||||
|
||||
/* control_page + KEXEC_CONTROL_CODE_MAX_SIZE
|
||||
/*
|
||||
* control_page + KEXEC_CONTROL_CODE_MAX_SIZE
|
||||
* ~ control_page + PAGE_SIZE are used as data storage and stack for
|
||||
* jumping back
|
||||
*/
|
||||
|
|
@ -76,8 +77,10 @@ relocate_kernel:
|
|||
movl %eax, CP_PA_SWAP_PAGE(%edi)
|
||||
movl %ebx, CP_PA_BACKUP_PAGES_MAP(%edi)
|
||||
|
||||
/* get physical address of control page now */
|
||||
/* this is impossible after page table switch */
|
||||
/*
|
||||
* get physical address of control page now
|
||||
* this is impossible after page table switch
|
||||
*/
|
||||
movl PTR(PA_CONTROL_PAGE)(%ebp), %edi
|
||||
|
||||
/* switch to new set of page tables */
|
||||
|
|
@ -97,7 +100,8 @@ identity_mapped:
|
|||
/* store the start address on the stack */
|
||||
pushl %edx
|
||||
|
||||
/* Set cr0 to a known state:
|
||||
/*
|
||||
* Set cr0 to a known state:
|
||||
* - Paging disabled
|
||||
* - Alignment check disabled
|
||||
* - Write protect disabled
|
||||
|
|
@ -113,7 +117,8 @@ identity_mapped:
|
|||
/* clear cr4 if applicable */
|
||||
testl %ecx, %ecx
|
||||
jz 1f
|
||||
/* Set cr4 to a known state:
|
||||
/*
|
||||
* Set cr4 to a known state:
|
||||
* Setting everything to zero seems safe.
|
||||
*/
|
||||
xorl %eax, %eax
|
||||
|
|
@ -132,15 +137,18 @@ identity_mapped:
|
|||
call swap_pages
|
||||
addl $8, %esp
|
||||
|
||||
/* To be certain of avoiding problems with self-modifying code
|
||||
/*
|
||||
* To be certain of avoiding problems with self-modifying code
|
||||
* I need to execute a serializing instruction here.
|
||||
* So I flush the TLB, it's handy, and not processor dependent.
|
||||
*/
|
||||
xorl %eax, %eax
|
||||
movl %eax, %cr3
|
||||
|
||||
/* set all of the registers to known values */
|
||||
/* leave %esp alone */
|
||||
/*
|
||||
* set all of the registers to known values
|
||||
* leave %esp alone
|
||||
*/
|
||||
|
||||
testl %esi, %esi
|
||||
jnz 1f
|
||||
|
|
|
|||
|
|
@ -19,29 +19,77 @@
|
|||
#define PTR(x) (x << 3)
|
||||
#define PAGE_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
|
||||
|
||||
/*
|
||||
* control_page + KEXEC_CONTROL_CODE_MAX_SIZE
|
||||
* ~ control_page + PAGE_SIZE are used as data storage and stack for
|
||||
* jumping back
|
||||
*/
|
||||
#define DATA(offset) (KEXEC_CONTROL_CODE_MAX_SIZE+(offset))
|
||||
|
||||
/* Minimal CPU state */
|
||||
#define RSP DATA(0x0)
|
||||
#define CR0 DATA(0x8)
|
||||
#define CR3 DATA(0x10)
|
||||
#define CR4 DATA(0x18)
|
||||
|
||||
/* other data */
|
||||
#define CP_PA_TABLE_PAGE DATA(0x20)
|
||||
#define CP_PA_SWAP_PAGE DATA(0x28)
|
||||
#define CP_PA_BACKUP_PAGES_MAP DATA(0x30)
|
||||
|
||||
.text
|
||||
.align PAGE_SIZE
|
||||
.code64
|
||||
.globl relocate_kernel
|
||||
relocate_kernel:
|
||||
/* %rdi indirection_page
|
||||
/*
|
||||
* %rdi indirection_page
|
||||
* %rsi page_list
|
||||
* %rdx start address
|
||||
* %rcx preserve_context
|
||||
*/
|
||||
|
||||
/* Save the CPU context, used for jumping back */
|
||||
pushq %rbx
|
||||
pushq %rbp
|
||||
pushq %r12
|
||||
pushq %r13
|
||||
pushq %r14
|
||||
pushq %r15
|
||||
pushf
|
||||
|
||||
movq PTR(VA_CONTROL_PAGE)(%rsi), %r11
|
||||
movq %rsp, RSP(%r11)
|
||||
movq %cr0, %rax
|
||||
movq %rax, CR0(%r11)
|
||||
movq %cr3, %rax
|
||||
movq %rax, CR3(%r11)
|
||||
movq %cr4, %rax
|
||||
movq %rax, CR4(%r11)
|
||||
|
||||
/* zero out flags, and disable interrupts */
|
||||
pushq $0
|
||||
popfq
|
||||
|
||||
/* get physical address of control page now */
|
||||
/* this is impossible after page table switch */
|
||||
/*
|
||||
* get physical address of control page now
|
||||
* this is impossible after page table switch
|
||||
*/
|
||||
movq PTR(PA_CONTROL_PAGE)(%rsi), %r8
|
||||
|
||||
/* get physical address of page table now too */
|
||||
movq PTR(PA_TABLE_PAGE)(%rsi), %rcx
|
||||
movq PTR(PA_TABLE_PAGE)(%rsi), %r9
|
||||
|
||||
/* get physical address of swap page now */
|
||||
movq PTR(PA_SWAP_PAGE)(%rsi), %r10
|
||||
|
||||
/* save some information for jumping back */
|
||||
movq %r9, CP_PA_TABLE_PAGE(%r11)
|
||||
movq %r10, CP_PA_SWAP_PAGE(%r11)
|
||||
movq %rdi, CP_PA_BACKUP_PAGES_MAP(%r11)
|
||||
|
||||
/* Switch to the identity mapped page tables */
|
||||
movq %rcx, %cr3
|
||||
movq %r9, %cr3
|
||||
|
||||
/* setup a new stack at the end of the physical control page */
|
||||
lea PAGE_SIZE(%r8), %rsp
|
||||
|
|
@ -55,7 +103,8 @@ identity_mapped:
|
|||
/* store the start address on the stack */
|
||||
pushq %rdx
|
||||
|
||||
/* Set cr0 to a known state:
|
||||
/*
|
||||
* Set cr0 to a known state:
|
||||
* - Paging enabled
|
||||
* - Alignment check disabled
|
||||
* - Write protect disabled
|
||||
|
|
@ -68,7 +117,8 @@ identity_mapped:
|
|||
orl $(X86_CR0_PG | X86_CR0_PE), %eax
|
||||
movq %rax, %cr0
|
||||
|
||||
/* Set cr4 to a known state:
|
||||
/*
|
||||
* Set cr4 to a known state:
|
||||
* - physical address extension enabled
|
||||
*/
|
||||
movq $X86_CR4_PAE, %rax
|
||||
|
|
@ -78,9 +128,87 @@ identity_mapped:
|
|||
1:
|
||||
|
||||
/* Flush the TLB (needed?) */
|
||||
movq %rcx, %cr3
|
||||
movq %r9, %cr3
|
||||
|
||||
movq %rcx, %r11
|
||||
call swap_pages
|
||||
|
||||
/*
|
||||
* To be certain of avoiding problems with self-modifying code
|
||||
* I need to execute a serializing instruction here.
|
||||
* So I flush the TLB by reloading %cr3 here, it's handy,
|
||||
* and not processor dependent.
|
||||
*/
|
||||
movq %cr3, %rax
|
||||
movq %rax, %cr3
|
||||
|
||||
/*
|
||||
* set all of the registers to known values
|
||||
* leave %rsp alone
|
||||
*/
|
||||
|
||||
testq %r11, %r11
|
||||
jnz 1f
|
||||
xorq %rax, %rax
|
||||
xorq %rbx, %rbx
|
||||
xorq %rcx, %rcx
|
||||
xorq %rdx, %rdx
|
||||
xorq %rsi, %rsi
|
||||
xorq %rdi, %rdi
|
||||
xorq %rbp, %rbp
|
||||
xorq %r8, %r8
|
||||
xorq %r9, %r9
|
||||
xorq %r10, %r9
|
||||
xorq %r11, %r11
|
||||
xorq %r12, %r12
|
||||
xorq %r13, %r13
|
||||
xorq %r14, %r14
|
||||
xorq %r15, %r15
|
||||
|
||||
ret
|
||||
|
||||
1:
|
||||
popq %rdx
|
||||
leaq PAGE_SIZE(%r10), %rsp
|
||||
call *%rdx
|
||||
|
||||
/* get the re-entry point of the peer system */
|
||||
movq 0(%rsp), %rbp
|
||||
call 1f
|
||||
1:
|
||||
popq %r8
|
||||
subq $(1b - relocate_kernel), %r8
|
||||
movq CP_PA_SWAP_PAGE(%r8), %r10
|
||||
movq CP_PA_BACKUP_PAGES_MAP(%r8), %rdi
|
||||
movq CP_PA_TABLE_PAGE(%r8), %rax
|
||||
movq %rax, %cr3
|
||||
lea PAGE_SIZE(%r8), %rsp
|
||||
call swap_pages
|
||||
movq $virtual_mapped, %rax
|
||||
pushq %rax
|
||||
ret
|
||||
|
||||
virtual_mapped:
|
||||
movq RSP(%r8), %rsp
|
||||
movq CR4(%r8), %rax
|
||||
movq %rax, %cr4
|
||||
movq CR3(%r8), %rax
|
||||
movq CR0(%r8), %r8
|
||||
movq %rax, %cr3
|
||||
movq %r8, %cr0
|
||||
movq %rbp, %rax
|
||||
|
||||
popf
|
||||
popq %r15
|
||||
popq %r14
|
||||
popq %r13
|
||||
popq %r12
|
||||
popq %rbp
|
||||
popq %rbx
|
||||
ret
|
||||
|
||||
/* Do the copies */
|
||||
swap_pages:
|
||||
movq %rdi, %rcx /* Put the page_list in %rcx */
|
||||
xorq %rdi, %rdi
|
||||
xorq %rsi, %rsi
|
||||
|
|
@ -112,36 +240,27 @@ identity_mapped:
|
|||
movq %rcx, %rsi /* For ever source page do a copy */
|
||||
andq $0xfffffffffffff000, %rsi
|
||||
|
||||
movq %rdi, %rdx
|
||||
movq %rsi, %rax
|
||||
|
||||
movq %r10, %rdi
|
||||
movq $512, %rcx
|
||||
rep ; movsq
|
||||
|
||||
movq %rax, %rdi
|
||||
movq %rdx, %rsi
|
||||
movq $512, %rcx
|
||||
rep ; movsq
|
||||
|
||||
movq %rdx, %rdi
|
||||
movq %r10, %rsi
|
||||
movq $512, %rcx
|
||||
rep ; movsq
|
||||
|
||||
lea PAGE_SIZE(%rax), %rsi
|
||||
jmp 0b
|
||||
3:
|
||||
|
||||
/* To be certain of avoiding problems with self-modifying code
|
||||
* I need to execute a serializing instruction here.
|
||||
* So I flush the TLB by reloading %cr3 here, it's handy,
|
||||
* and not processor dependent.
|
||||
*/
|
||||
movq %cr3, %rax
|
||||
movq %rax, %cr3
|
||||
|
||||
/* set all of the registers to known values */
|
||||
/* leave %rsp alone */
|
||||
|
||||
xorq %rax, %rax
|
||||
xorq %rbx, %rbx
|
||||
xorq %rcx, %rcx
|
||||
xorq %rdx, %rdx
|
||||
xorq %rsi, %rsi
|
||||
xorq %rdi, %rdi
|
||||
xorq %rbp, %rbp
|
||||
xorq %r8, %r8
|
||||
xorq %r9, %r9
|
||||
xorq %r10, %r9
|
||||
xorq %r11, %r11
|
||||
xorq %r12, %r12
|
||||
xorq %r13, %r13
|
||||
xorq %r14, %r14
|
||||
xorq %r15, %r15
|
||||
|
||||
ret
|
||||
|
||||
.globl kexec_control_code_size
|
||||
.set kexec_control_code_size, . - relocate_kernel
|
||||
|
|
|
|||
|
|
@ -578,7 +578,7 @@ static struct irq_chip piix4_virtual_irq_type = {
|
|||
static irqreturn_t piix4_master_intr(int irq, void *dev_id)
|
||||
{
|
||||
int realirq;
|
||||
irq_desc_t *desc;
|
||||
struct irq_desc *desc;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&i8259A_lock, flags);
|
||||
|
|
|
|||
|
|
@ -275,3 +275,10 @@ ASSERT((_end - _text <= KERNEL_IMAGE_SIZE),
|
|||
ASSERT((per_cpu__irq_stack_union == 0),
|
||||
"irq_stack_union is not at start of per-cpu area");
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_KEXEC
|
||||
#include <asm/kexec.h>
|
||||
|
||||
ASSERT(kexec_control_code_size <= KEXEC_CONTROL_CODE_MAX_SIZE,
|
||||
"kexec control code size is too big")
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -1,30 +1,38 @@
|
|||
/* Copyright 2002 Andi Kleen */
|
||||
|
||||
#include <linux/linkage.h>
|
||||
#include <asm/dwarf2.h>
|
||||
|
||||
#include <asm/cpufeature.h>
|
||||
#include <asm/dwarf2.h>
|
||||
|
||||
/*
|
||||
* memcpy - Copy a memory block.
|
||||
*
|
||||
* Input:
|
||||
* rdi destination
|
||||
* rsi source
|
||||
* rdx count
|
||||
*
|
||||
* Input:
|
||||
* rdi destination
|
||||
* rsi source
|
||||
* rdx count
|
||||
*
|
||||
* Output:
|
||||
* rax original destination
|
||||
*/
|
||||
*/
|
||||
|
||||
/*
|
||||
* memcpy_c() - fast string ops (REP MOVSQ) based variant.
|
||||
*
|
||||
* Calls to this get patched into the kernel image via the
|
||||
* alternative instructions framework:
|
||||
*/
|
||||
ALIGN
|
||||
memcpy_c:
|
||||
CFI_STARTPROC
|
||||
movq %rdi,%rax
|
||||
movl %edx,%ecx
|
||||
shrl $3,%ecx
|
||||
andl $7,%edx
|
||||
movq %rdi, %rax
|
||||
|
||||
movl %edx, %ecx
|
||||
shrl $3, %ecx
|
||||
andl $7, %edx
|
||||
rep movsq
|
||||
movl %edx,%ecx
|
||||
movl %edx, %ecx
|
||||
rep movsb
|
||||
ret
|
||||
CFI_ENDPROC
|
||||
|
|
@ -33,99 +41,110 @@ ENDPROC(memcpy_c)
|
|||
ENTRY(__memcpy)
|
||||
ENTRY(memcpy)
|
||||
CFI_STARTPROC
|
||||
pushq %rbx
|
||||
CFI_ADJUST_CFA_OFFSET 8
|
||||
CFI_REL_OFFSET rbx, 0
|
||||
movq %rdi,%rax
|
||||
|
||||
movl %edx,%ecx
|
||||
shrl $6,%ecx
|
||||
/*
|
||||
* Put the number of full 64-byte blocks into %ecx.
|
||||
* Tail portion is handled at the end:
|
||||
*/
|
||||
movq %rdi, %rax
|
||||
movl %edx, %ecx
|
||||
shrl $6, %ecx
|
||||
jz .Lhandle_tail
|
||||
|
||||
.p2align 4
|
||||
.Lloop_64:
|
||||
/*
|
||||
* We decrement the loop index here - and the zero-flag is
|
||||
* checked at the end of the loop (instructions inbetween do
|
||||
* not change the zero flag):
|
||||
*/
|
||||
decl %ecx
|
||||
|
||||
movq (%rsi),%r11
|
||||
movq 8(%rsi),%r8
|
||||
/*
|
||||
* Move in blocks of 4x16 bytes:
|
||||
*/
|
||||
movq 0*8(%rsi), %r11
|
||||
movq 1*8(%rsi), %r8
|
||||
movq %r11, 0*8(%rdi)
|
||||
movq %r8, 1*8(%rdi)
|
||||
|
||||
movq %r11,(%rdi)
|
||||
movq %r8,1*8(%rdi)
|
||||
movq 2*8(%rsi), %r9
|
||||
movq 3*8(%rsi), %r10
|
||||
movq %r9, 2*8(%rdi)
|
||||
movq %r10, 3*8(%rdi)
|
||||
|
||||
movq 2*8(%rsi),%r9
|
||||
movq 3*8(%rsi),%r10
|
||||
movq 4*8(%rsi), %r11
|
||||
movq 5*8(%rsi), %r8
|
||||
movq %r11, 4*8(%rdi)
|
||||
movq %r8, 5*8(%rdi)
|
||||
|
||||
movq %r9,2*8(%rdi)
|
||||
movq %r10,3*8(%rdi)
|
||||
movq 6*8(%rsi), %r9
|
||||
movq 7*8(%rsi), %r10
|
||||
movq %r9, 6*8(%rdi)
|
||||
movq %r10, 7*8(%rdi)
|
||||
|
||||
movq 4*8(%rsi),%r11
|
||||
movq 5*8(%rsi),%r8
|
||||
leaq 64(%rsi), %rsi
|
||||
leaq 64(%rdi), %rdi
|
||||
|
||||
movq %r11,4*8(%rdi)
|
||||
movq %r8,5*8(%rdi)
|
||||
|
||||
movq 6*8(%rsi),%r9
|
||||
movq 7*8(%rsi),%r10
|
||||
|
||||
movq %r9,6*8(%rdi)
|
||||
movq %r10,7*8(%rdi)
|
||||
|
||||
leaq 64(%rsi),%rsi
|
||||
leaq 64(%rdi),%rdi
|
||||
jnz .Lloop_64
|
||||
|
||||
.Lhandle_tail:
|
||||
movl %edx,%ecx
|
||||
andl $63,%ecx
|
||||
shrl $3,%ecx
|
||||
movl %edx, %ecx
|
||||
andl $63, %ecx
|
||||
shrl $3, %ecx
|
||||
jz .Lhandle_7
|
||||
|
||||
.p2align 4
|
||||
.Lloop_8:
|
||||
decl %ecx
|
||||
movq (%rsi),%r8
|
||||
movq %r8,(%rdi)
|
||||
leaq 8(%rdi),%rdi
|
||||
leaq 8(%rsi),%rsi
|
||||
movq (%rsi), %r8
|
||||
movq %r8, (%rdi)
|
||||
leaq 8(%rdi), %rdi
|
||||
leaq 8(%rsi), %rsi
|
||||
jnz .Lloop_8
|
||||
|
||||
.Lhandle_7:
|
||||
movl %edx,%ecx
|
||||
andl $7,%ecx
|
||||
jz .Lende
|
||||
movl %edx, %ecx
|
||||
andl $7, %ecx
|
||||
jz .Lend
|
||||
|
||||
.p2align 4
|
||||
.Lloop_1:
|
||||
movb (%rsi),%r8b
|
||||
movb %r8b,(%rdi)
|
||||
movb (%rsi), %r8b
|
||||
movb %r8b, (%rdi)
|
||||
incq %rdi
|
||||
incq %rsi
|
||||
decl %ecx
|
||||
jnz .Lloop_1
|
||||
|
||||
.Lende:
|
||||
popq %rbx
|
||||
CFI_ADJUST_CFA_OFFSET -8
|
||||
CFI_RESTORE rbx
|
||||
.Lend:
|
||||
ret
|
||||
.Lfinal:
|
||||
CFI_ENDPROC
|
||||
ENDPROC(memcpy)
|
||||
ENDPROC(__memcpy)
|
||||
|
||||
/* Some CPUs run faster using the string copy instructions.
|
||||
It is also a lot simpler. Use this when possible */
|
||||
/*
|
||||
* Some CPUs run faster using the string copy instructions.
|
||||
* It is also a lot simpler. Use this when possible:
|
||||
*/
|
||||
|
||||
.section .altinstr_replacement,"ax"
|
||||
.section .altinstr_replacement, "ax"
|
||||
1: .byte 0xeb /* jmp <disp8> */
|
||||
.byte (memcpy_c - memcpy) - (2f - 1b) /* offset */
|
||||
2:
|
||||
.previous
|
||||
.section .altinstructions,"a"
|
||||
|
||||
.section .altinstructions, "a"
|
||||
.align 8
|
||||
.quad memcpy
|
||||
.quad 1b
|
||||
.byte X86_FEATURE_REP_GOOD
|
||||
/* Replace only beginning, memcpy is used to apply alternatives, so it
|
||||
* is silly to overwrite itself with nops - reboot is only outcome... */
|
||||
|
||||
/*
|
||||
* Replace only beginning, memcpy is used to apply alternatives,
|
||||
* so it is silly to overwrite itself with nops - reboot is the
|
||||
* only outcome...
|
||||
*/
|
||||
.byte 2b - 1b
|
||||
.byte 2b - 1b
|
||||
.previous
|
||||
|
|
|
|||
|
|
@ -121,23 +121,30 @@ void kunmap_atomic(void *kvaddr, enum km_type type)
|
|||
pagefault_enable();
|
||||
}
|
||||
|
||||
/* This is the same as kmap_atomic() but can map memory that doesn't
|
||||
* have a struct page associated with it.
|
||||
*/
|
||||
void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
|
||||
void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot)
|
||||
{
|
||||
enum fixed_addresses idx;
|
||||
unsigned long vaddr;
|
||||
|
||||
pagefault_disable();
|
||||
|
||||
idx = type + KM_TYPE_NR*smp_processor_id();
|
||||
debug_kmap_atomic_prot(type);
|
||||
|
||||
idx = type + KM_TYPE_NR * smp_processor_id();
|
||||
vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
|
||||
set_pte(kmap_pte-idx, pfn_pte(pfn, kmap_prot));
|
||||
set_pte(kmap_pte - idx, pfn_pte(pfn, prot));
|
||||
arch_flush_lazy_mmu_mode();
|
||||
|
||||
return (void*) vaddr;
|
||||
}
|
||||
|
||||
/* This is the same as kmap_atomic() but can map memory that doesn't
|
||||
* have a struct page associated with it.
|
||||
*/
|
||||
void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
|
||||
{
|
||||
return kmap_atomic_prot_pfn(pfn, type, kmap_prot);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(kmap_atomic_pfn); /* temporarily in use by i915 GEM until vmap */
|
||||
|
||||
struct page *kmap_atomic_to_page(void *ptr)
|
||||
|
|
|
|||
|
|
@ -18,6 +18,7 @@
|
|||
|
||||
#include <asm/iomap.h>
|
||||
#include <asm/pat.h>
|
||||
#include <asm/highmem.h>
|
||||
#include <linux/module.h>
|
||||
|
||||
int is_io_mapping_possible(resource_size_t base, unsigned long size)
|
||||
|
|
@ -36,11 +37,6 @@ EXPORT_SYMBOL_GPL(is_io_mapping_possible);
|
|||
void *
|
||||
iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot)
|
||||
{
|
||||
enum fixed_addresses idx;
|
||||
unsigned long vaddr;
|
||||
|
||||
pagefault_disable();
|
||||
|
||||
/*
|
||||
* For non-PAT systems, promote PAGE_KERNEL_WC to PAGE_KERNEL_UC_MINUS.
|
||||
* PAGE_KERNEL_WC maps to PWT, which translates to uncached if the
|
||||
|
|
@ -50,12 +46,7 @@ iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot)
|
|||
if (!pat_enabled && pgprot_val(prot) == pgprot_val(PAGE_KERNEL_WC))
|
||||
prot = PAGE_KERNEL_UC_MINUS;
|
||||
|
||||
idx = type + KM_TYPE_NR*smp_processor_id();
|
||||
vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
|
||||
set_pte(kmap_pte-idx, pfn_pte(pfn, prot));
|
||||
arch_flush_lazy_mmu_mode();
|
||||
|
||||
return (void*) vaddr;
|
||||
return kmap_atomic_prot_pfn(pfn, type, prot);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(iomap_atomic_prot_pfn);
|
||||
|
||||
|
|
|
|||
|
|
@ -310,7 +310,7 @@ static int post_kmmio_handler(unsigned long condition, struct pt_regs *regs)
|
|||
struct kmmio_context *ctx = &get_cpu_var(kmmio_ctx);
|
||||
|
||||
if (!ctx->active) {
|
||||
pr_warning("kmmio: spurious debug trap on CPU %d.\n",
|
||||
pr_debug("kmmio: spurious debug trap on CPU %d.\n",
|
||||
smp_processor_id());
|
||||
goto out;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue