ia64/pv_ops: gate page paravirtualization.
paravirtualize gate page by allowing each pv_ops instances to define its own gate page. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>hifive-unleashed-5.1
Isaku Yamahata
Tony Luck
parent
1aec1c558a
commit
e4ff5b8f54
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@ -0,0 +1,38 @@
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/******************************************************************************
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* arch/ia64/include/asm/native/inst.h
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*
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* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
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* VA Linux Systems Japan K.K.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#define __paravirt_start_gate_fsyscall_patchlist \
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__ia64_native_start_gate_fsyscall_patchlist
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#define __paravirt_end_gate_fsyscall_patchlist \
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__ia64_native_end_gate_fsyscall_patchlist
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#define __paravirt_start_gate_brl_fsys_bubble_down_patchlist \
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__ia64_native_start_gate_brl_fsys_bubble_down_patchlist
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#define __paravirt_end_gate_brl_fsys_bubble_down_patchlist \
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__ia64_native_end_gate_brl_fsys_bubble_down_patchlist
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#define __paravirt_start_gate_vtop_patchlist \
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__ia64_native_start_gate_vtop_patchlist
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#define __paravirt_end_gate_vtop_patchlist \
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__ia64_native_end_gate_vtop_patchlist
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#define __paravirt_start_gate_mckinley_e9_patchlist \
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__ia64_native_start_gate_mckinley_e9_patchlist
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#define __paravirt_end_gate_mckinley_e9_patchlist \
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__ia64_native_end_gate_mckinley_e9_patchlist
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@ -35,6 +35,41 @@ extern struct pv_fsys_data pv_fsys_data;
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unsigned long *paravirt_get_fsyscall_table(void);
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char *paravirt_get_fsys_bubble_down(void);
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/******************************************************************************
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* patchlist addresses for gate page
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*/
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enum pv_gate_patchlist {
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PV_GATE_START_FSYSCALL,
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PV_GATE_END_FSYSCALL,
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PV_GATE_START_BRL_FSYS_BUBBLE_DOWN,
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PV_GATE_END_BRL_FSYS_BUBBLE_DOWN,
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PV_GATE_START_VTOP,
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PV_GATE_END_VTOP,
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PV_GATE_START_MCKINLEY_E9,
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PV_GATE_END_MCKINLEY_E9,
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};
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struct pv_patchdata {
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unsigned long start_fsyscall_patchlist;
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unsigned long end_fsyscall_patchlist;
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unsigned long start_brl_fsys_bubble_down_patchlist;
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unsigned long end_brl_fsys_bubble_down_patchlist;
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unsigned long start_vtop_patchlist;
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unsigned long end_vtop_patchlist;
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unsigned long start_mckinley_e9_patchlist;
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unsigned long end_mckinley_e9_patchlist;
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void *gate_section;
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};
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extern struct pv_patchdata pv_patchdata;
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unsigned long paravirt_get_gate_patchlist(enum pv_gate_patchlist type);
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void *paravirt_get_gate_section(void);
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#endif
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#ifdef CONFIG_PARAVIRT_GUEST
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@ -5,7 +5,7 @@
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extra-y := head.o init_task.o vmlinux.lds
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obj-y := acpi.o entry.o efi.o efi_stub.o gate-data.o fsys.o ia64_ksyms.o irq.o irq_ia64.o \
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irq_lsapic.o ivt.o machvec.o pal.o patch.o process.o perfmon.o ptrace.o sal.o \
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irq_lsapic.o ivt.o machvec.o pal.o paravirt_patchlist.o patch.o process.o perfmon.o ptrace.o sal.o \
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salinfo.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \
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unwind.o mca.o mca_asm.o topology.o
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@ -47,35 +47,13 @@ ifeq ($(CONFIG_DMAR), y)
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obj-$(CONFIG_SWIOTLB) += pci-swiotlb.o
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endif
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# The gate DSO image is built using a special linker script.
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targets += gate.so gate-syms.o
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extra-y += gate.so gate-syms.o gate.lds gate.o
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# fp_emulate() expects f2-f5,f16-f31 to contain the user-level state.
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CFLAGS_traps.o += -mfixed-range=f2-f5,f16-f31
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CPPFLAGS_gate.lds := -P -C -U$(ARCH)
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quiet_cmd_gate = GATE $@
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cmd_gate = $(CC) -nostdlib $(GATECFLAGS_$(@F)) -Wl,-T,$(filter-out FORCE,$^) -o $@
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GATECFLAGS_gate.so = -shared -s -Wl,-soname=linux-gate.so.1 \
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$(call ld-option, -Wl$(comma)--hash-style=sysv)
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$(obj)/gate.so: $(obj)/gate.lds $(obj)/gate.o FORCE
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$(call if_changed,gate)
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$(obj)/built-in.o: $(obj)/gate-syms.o
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$(obj)/built-in.o: ld_flags += -R $(obj)/gate-syms.o
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GATECFLAGS_gate-syms.o = -r
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$(obj)/gate-syms.o: $(obj)/gate.lds $(obj)/gate.o FORCE
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$(call if_changed,gate)
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# gate-data.o contains the gate DSO image as data in section .data.gate.
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# We must build gate.so before we can assemble it.
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# Note: kbuild does not track this dependency due to usage of .incbin
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$(obj)/gate-data.o: $(obj)/gate.so
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# The gate DSO image is built using a special linker script.
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include $(srctree)/arch/ia64/kernel/Makefile.gate
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# tell compiled for native
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CPPFLAGS_gate.lds += -D__IA64_GATE_PARAVIRTUALIZED_NATIVE
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# Calculate NR_IRQ = max(IA64_NATIVE_NR_IRQS, XEN_NR_IRQS, ...) based on config
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define sed-y
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@ -0,0 +1,27 @@
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# The gate DSO image is built using a special linker script.
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targets += gate.so gate-syms.o
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extra-y += gate.so gate-syms.o gate.lds gate.o
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CPPFLAGS_gate.lds := -P -C -U$(ARCH)
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quiet_cmd_gate = GATE $@
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cmd_gate = $(CC) -nostdlib $(GATECFLAGS_$(@F)) -Wl,-T,$(filter-out FORCE,$^) -o $@
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GATECFLAGS_gate.so = -shared -s -Wl,-soname=linux-gate.so.1 \
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$(call ld-option, -Wl$(comma)--hash-style=sysv)
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$(obj)/gate.so: $(obj)/gate.lds $(obj)/gate.o FORCE
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$(call if_changed,gate)
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$(obj)/built-in.o: $(obj)/gate-syms.o
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$(obj)/built-in.o: ld_flags += -R $(obj)/gate-syms.o
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GATECFLAGS_gate-syms.o = -r
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$(obj)/gate-syms.o: $(obj)/gate.lds $(obj)/gate.o FORCE
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$(call if_changed,gate)
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# gate-data.o contains the gate DSO image as data in section .data.gate.
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# We must build gate.so before we can assemble it.
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# Note: kbuild does not track this dependency due to usage of .incbin
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$(obj)/gate-data.o: $(obj)/gate.so
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@ -7,6 +7,7 @@
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#include <asm/system.h>
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#include "paravirt_patchlist.h"
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SECTIONS
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{
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@ -33,21 +34,21 @@ SECTIONS
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. = GATE_ADDR + 0x600;
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.data.patch : {
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__start_gate_mckinley_e9_patchlist = .;
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__paravirt_start_gate_mckinley_e9_patchlist = .;
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*(.data.patch.mckinley_e9)
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__end_gate_mckinley_e9_patchlist = .;
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__paravirt_end_gate_mckinley_e9_patchlist = .;
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__start_gate_vtop_patchlist = .;
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__paravirt_start_gate_vtop_patchlist = .;
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*(.data.patch.vtop)
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__end_gate_vtop_patchlist = .;
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__paravirt_end_gate_vtop_patchlist = .;
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__start_gate_fsyscall_patchlist = .;
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__paravirt_start_gate_fsyscall_patchlist = .;
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*(.data.patch.fsyscall_table)
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__end_gate_fsyscall_patchlist = .;
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__paravirt_end_gate_fsyscall_patchlist = .;
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__start_gate_brl_fsys_bubble_down_patchlist = .;
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__paravirt_start_gate_brl_fsys_bubble_down_patchlist = .;
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*(.data.patch.brl_fsys_bubble_down)
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__end_gate_brl_fsys_bubble_down_patchlist = .;
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__paravirt_end_gate_brl_fsys_bubble_down_patchlist = .;
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} :readable
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.IA_64.unwind_info : { *(.IA_64.unwind_info*) }
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@ -0,0 +1,79 @@
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/******************************************************************************
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* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
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* VA Linux Systems Japan K.K.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/bug.h>
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#include <asm/paravirt.h>
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#define DECLARE(name) \
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extern unsigned long \
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__ia64_native_start_gate_##name##_patchlist[]; \
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extern unsigned long \
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__ia64_native_end_gate_##name##_patchlist[]
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DECLARE(fsyscall);
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DECLARE(brl_fsys_bubble_down);
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DECLARE(vtop);
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DECLARE(mckinley_e9);
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extern unsigned long __start_gate_section[];
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#define ASSIGN(name) \
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.start_##name##_patchlist = \
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(unsigned long)__ia64_native_start_gate_##name##_patchlist, \
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.end_##name##_patchlist = \
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(unsigned long)__ia64_native_end_gate_##name##_patchlist
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struct pv_patchdata pv_patchdata __initdata = {
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ASSIGN(fsyscall),
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ASSIGN(brl_fsys_bubble_down),
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ASSIGN(vtop),
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ASSIGN(mckinley_e9),
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.gate_section = (void*)__start_gate_section,
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};
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unsigned long __init
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paravirt_get_gate_patchlist(enum pv_gate_patchlist type)
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{
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#define CASE(NAME, name) \
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case PV_GATE_START_##NAME: \
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return pv_patchdata.start_##name##_patchlist; \
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case PV_GATE_END_##NAME: \
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return pv_patchdata.end_##name##_patchlist; \
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switch (type) {
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CASE(FSYSCALL, fsyscall);
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CASE(BRL_FSYS_BUBBLE_DOWN, brl_fsys_bubble_down);
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CASE(VTOP, vtop);
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CASE(MCKINLEY_E9, mckinley_e9);
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default:
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BUG();
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break;
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}
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return 0;
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}
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void * __init
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paravirt_get_gate_section(void)
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{
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return pv_patchdata.gate_section;
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}
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@ -0,0 +1,28 @@
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/******************************************************************************
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* linux/arch/ia64/xen/paravirt_patchlist.h
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*
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* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
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* VA Linux Systems Japan K.K.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#if defined(__IA64_GATE_PARAVIRTUALIZED_XEN)
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#include <asm/xen/patchlist.h>
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#else
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#include <asm/native/patchlist.h>
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#endif
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@ -227,13 +227,13 @@ patch_brl_fsys_bubble_down (unsigned long start, unsigned long end)
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void __init
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ia64_patch_gate (void)
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{
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# define START(name) ((unsigned long) __start_gate_##name##_patchlist)
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# define END(name) ((unsigned long)__end_gate_##name##_patchlist)
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# define START(name) paravirt_get_gate_patchlist(PV_GATE_START_##name)
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# define END(name) paravirt_get_gate_patchlist(PV_GATE_END_##name)
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patch_fsyscall_table(START(fsyscall), END(fsyscall));
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patch_brl_fsys_bubble_down(START(brl_fsys_bubble_down), END(brl_fsys_bubble_down));
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ia64_patch_vtop(START(vtop), END(vtop));
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ia64_patch_mckinley_e9(START(mckinley_e9), END(mckinley_e9));
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patch_fsyscall_table(START(FSYSCALL), END(FSYSCALL));
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patch_brl_fsys_bubble_down(START(BRL_FSYS_BUBBLE_DOWN), END(BRL_FSYS_BUBBLE_DOWN));
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ia64_patch_vtop(START(VTOP), END(VTOP));
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ia64_patch_mckinley_e9(START(MCKINLEY_E9), END(MCKINLEY_E9));
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}
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void ia64_patch_phys_stack_reg(unsigned long val)
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@ -260,6 +260,7 @@ put_kernel_page (struct page *page, unsigned long address, pgprot_t pgprot)
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static void __init
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setup_gate (void)
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{
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void *gate_section;
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struct page *page;
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/*
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@ -267,10 +268,11 @@ setup_gate (void)
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* headers etc. and once execute-only page to enable
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* privilege-promotion via "epc":
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*/
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page = virt_to_page(ia64_imva(__start_gate_section));
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gate_section = paravirt_get_gate_section();
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page = virt_to_page(ia64_imva(gate_section));
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put_kernel_page(page, GATE_ADDR, PAGE_READONLY);
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#ifdef HAVE_BUGGY_SEGREL
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page = virt_to_page(ia64_imva(__start_gate_section + PAGE_SIZE));
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page = virt_to_page(ia64_imva(gate_section + PAGE_SIZE));
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put_kernel_page(page, GATE_ADDR + PAGE_SIZE, PAGE_GATE);
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#else
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put_kernel_page(page, GATE_ADDR + PERCPU_PAGE_SIZE, PAGE_GATE);
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