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Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 

Pull tile updates from Chris Metcalf:
 "This includes secure computing support as well as miscellaneous minor
  improvements"

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  tile: correct some typos in opcode type names
  tile/vdso: emit a GNU hash as well
  tile: Remove finish_arch_switch
  tile: enable full SECCOMP support
  tile/time: Migrate to new 'set-state' interface
hifive-unleashed-5.1
Linus Torvalds 2015-09-04 08:59:53 -07:00
parent a4fdb2a46f 8d03bc56cc
commit 02cf1da254
13 changed files with 67 additions and 13 deletions
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2
Documentation/features/seccomp/seccomp-filter/arch-support.txt
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@ -32,7 +32,7 @@
| score: | TODO |
| sh: | TODO |
| sparc: | TODO |
| tile: | TODO |
| tile: | ok |
| um: | TODO |
| unicore32: | TODO |
| x86: | ok |

17
arch/tile/Kconfig
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@ -32,6 +32,7 @@ config TILE
select EDAC_SUPPORT
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select HAVE_ARCH_SECCOMP_FILTER
# FIXME: investigate whether we need/want these options.
# select HAVE_IOREMAP_PROT
@ -221,6 +222,22 @@ config COMPAT
If enabled, the kernel will support running TILE-Gx binaries
that were built with the -m32 option.
config SECCOMP
bool "Enable seccomp to safely compute untrusted bytecode"
depends on PROC_FS
help
This kernel feature is useful for number crunching applications
that may need to compute untrusted bytecode during their
execution. By using pipes or other transports made available to
the process as file descriptors supporting the read/write
syscalls, it's possible to isolate those applications in
their own address space using seccomp. Once seccomp is
enabled via prctl, it cannot be disabled and the task is only
allowed to execute a few safe syscalls defined by each seccomp
mode.
If unsure, say N.
config SYSVIPC_COMPAT
def_bool y
depends on COMPAT && SYSVIPC

1
arch/tile/include/asm/Kbuild
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@ -28,6 +28,7 @@ generic-y += poll.h
generic-y += posix_types.h
generic-y += preempt.h
generic-y += resource.h
generic-y += seccomp.h
generic-y += sembuf.h
generic-y += serial.h
generic-y += shmbuf.h

4
arch/tile/include/asm/elf.h
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@ -22,6 +22,7 @@
#include <arch/chip.h>
#include <linux/ptrace.h>
#include <linux/elf-em.h>
#include <asm/byteorder.h>
#include <asm/page.h>
@ -30,9 +31,6 @@ typedef unsigned long elf_greg_t;
#define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t))
typedef elf_greg_t elf_gregset_t[ELF_NGREG];
#define EM_TILEPRO 188
#define EM_TILEGX 191
/* Provide a nominal data structure. */
#define ELF_NFPREG 0
typedef double elf_fpreg_t;

28
arch/tile/include/asm/syscall.h
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@ -20,6 +20,8 @@
#include <linux/sched.h>
#include <linux/err.h>
#include <linux/audit.h>
#include <linux/compat.h>
#include <arch/abi.h>
/* The array of function pointers for syscalls. */
@ -61,7 +63,15 @@ static inline void syscall_set_return_value(struct task_struct *task,
struct pt_regs *regs,
int error, long val)
{
regs->regs[0] = (long) error ?: val;
if (error) {
/* R0 is the passed-in negative error, R1 is positive. */
regs->regs[0] = error;
regs->regs[1] = -error;
} else {
/* R1 set to zero to indicate no error. */
regs->regs[0] = val;
regs->regs[1] = 0;
}
}
static inline void syscall_get_arguments(struct task_struct *task,
@ -82,4 +92,20 @@ static inline void syscall_set_arguments(struct task_struct *task,
memcpy(&regs[i], args, n * sizeof(args[0]));
}
/*
* We don't care about endianness (__AUDIT_ARCH_LE bit) here because
* tile has the same system calls both on little- and big- endian.
*/
static inline int syscall_get_arch(void)
{
if (is_compat_task())
return AUDIT_ARCH_TILEGX32;
#ifdef CONFIG_TILEGX
return AUDIT_ARCH_TILEGX;
#else
return AUDIT_ARCH_TILEPRO;
#endif
}
#endif /* _ASM_TILE_SYSCALL_H */

6
arch/tile/include/uapi/arch/opcode_tilegx.h
View File

@ -830,11 +830,11 @@ enum
ADDX_RRR_0_OPCODE_X0 = 2,
ADDX_RRR_0_OPCODE_X1 = 2,
ADDX_RRR_0_OPCODE_Y0 = 0,
ADDX_SPECIAL_0_OPCODE_Y1 = 0,
ADDX_RRR_0_OPCODE_Y1 = 0,
ADD_RRR_0_OPCODE_X0 = 3,
ADD_RRR_0_OPCODE_X1 = 3,
ADD_RRR_0_OPCODE_Y0 = 1,
ADD_SPECIAL_0_OPCODE_Y1 = 1,
ADD_RRR_0_OPCODE_Y1 = 1,
ANDI_IMM8_OPCODE_X0 = 3,
ANDI_IMM8_OPCODE_X1 = 3,
ANDI_OPCODE_Y0 = 2,
@ -995,6 +995,7 @@ enum
LD4U_ADD_IMM8_OPCODE_X1 = 12,
LD4U_OPCODE_Y2 = 2,
LD4U_UNARY_OPCODE_X1 = 20,
LDNA_ADD_IMM8_OPCODE_X1 = 21,
LDNA_UNARY_OPCODE_X1 = 21,
LDNT1S_ADD_IMM8_OPCODE_X1 = 13,
LDNT1S_UNARY_OPCODE_X1 = 22,
@ -1015,7 +1016,6 @@ enum
LD_UNARY_OPCODE_X1 = 29,
LNK_UNARY_OPCODE_X1 = 30,
LNK_UNARY_OPCODE_Y1 = 14,
LWNA_ADD_IMM8_OPCODE_X1 = 21,
MFSPR_IMM8_OPCODE_X1 = 22,
MF_UNARY_OPCODE_X1 = 31,
MM_BF_OPCODE_X0 = 7,

1
arch/tile/kernel/intvec_32.S
View File

@ -1224,6 +1224,7 @@ handle_syscall:
jal do_syscall_trace_enter
}
FEEDBACK_REENTER(handle_syscall)
blz r0, .Lsyscall_sigreturn_skip
/*
* We always reload our registers from the stack at this

1
arch/tile/kernel/intvec_64.S
View File

@ -1247,6 +1247,7 @@ handle_syscall:
jal do_syscall_trace_enter
}
FEEDBACK_REENTER(handle_syscall)
bltz r0, .Lsyscall_sigreturn_skip
/*
* We always reload our registers from the stack at this

3
arch/tile/kernel/ptrace.c
View File

@ -262,6 +262,9 @@ int do_syscall_trace_enter(struct pt_regs *regs)
if (work & _TIF_NOHZ)
user_exit();
if (secure_computing() == -1)
return -1;
if (work & _TIF_SYSCALL_TRACE) {
if (tracehook_report_syscall_entry(regs))
regs->regs[TREG_SYSCALL_NR] = -1;

8
arch/tile/kernel/time.c
View File

@ -140,10 +140,10 @@ static int tile_timer_set_next_event(unsigned long ticks,
* Whenever anyone tries to change modes, we just mask interrupts
* and wait for the next event to get set.
*/
static void tile_timer_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
static int tile_timer_shutdown(struct clock_event_device *evt)
{
arch_local_irq_mask_now(INT_TILE_TIMER);
return 0;
}
/*
@ -157,7 +157,9 @@ static DEFINE_PER_CPU(struct clock_event_device, tile_timer) = {
.rating = 100,
.irq = -1,
.set_next_event = tile_timer_set_next_event,
.set_mode = tile_timer_set_mode,
.set_state_shutdown = tile_timer_shutdown,
.set_state_oneshot = tile_timer_shutdown,
.tick_resume = tile_timer_shutdown,
};
void setup_tile_timer(void)

4
arch/tile/kernel/vdso/Makefile
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@ -54,7 +54,7 @@ $(obj)/built-in.o: $(obj)/vdso-syms.o
$(obj)/built-in.o: ld_flags += -R $(obj)/vdso-syms.o
SYSCFLAGS_vdso.so.dbg = -shared -s -Wl,-soname=linux-vdso.so.1 \
$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
$(call cc-ldoption, -Wl$(comma)--hash-style=both)
SYSCFLAGS_vdso_syms.o = -r
$(obj)/vdso-syms.o: $(src)/vdso.lds $(obj)/vrt_sigreturn.o FORCE
$(call if_changed,vdsold)
@ -113,6 +113,6 @@ $(obj)/vrt_sigreturn32.o: $(obj)/vrt_sigreturn.S
$(obj)/vdso32.o: $(obj)/vdso32.so
SYSCFLAGS_vdso32.so.dbg = -m32 -shared -s -Wl,-soname=linux-vdso32.so.1 \
$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
$(call cc-ldoption, -Wl$(comma)--hash-style=both)
$(obj)/vdso32.so.dbg: $(src)/vdso.lds $(obj-vdso32)
$(call if_changed,vdsold)

3
include/uapi/linux/audit.h
View File

@ -382,6 +382,9 @@ enum {
#define AUDIT_ARCH_SHEL64 (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_SPARC (EM_SPARC)
#define AUDIT_ARCH_SPARC64 (EM_SPARCV9|__AUDIT_ARCH_64BIT)
#define AUDIT_ARCH_TILEGX (EM_TILEGX|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_TILEGX32 (EM_TILEGX|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_TILEPRO (EM_TILEPRO|__AUDIT_ARCH_LE)
#define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
#define AUDIT_PERM_EXEC 1

2
include/uapi/linux/elf-em.h
View File

@ -38,6 +38,8 @@
#define EM_ALTERA_NIOS2 113 /* Altera Nios II soft-core processor */
#define EM_TI_C6000 140 /* TI C6X DSPs */
#define EM_AARCH64 183 /* ARM 64 bit */
#define EM_TILEPRO 188 /* Tilera TILEPro */
#define EM_TILEGX 191 /* Tilera TILE-Gx */
#define EM_FRV 0x5441 /* Fujitsu FR-V */
#define EM_AVR32 0x18ad /* Atmel AVR32 */