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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-01 19:57:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-01 19:57:58 -0700 |
| commit | 6dc2cce9321198172cd96f955a5fc798a4cc35a6 (patch) | |
| tree | 7947bbc1aa0dd5a3752ac33556f5647d9a14b133 /include | |
| parent | 207fb8c3049cdc31de20ca9f91d0ae319125eb62 (diff) | |
| parent | f3e4559781bf0c393364baa6b772233088a711db (diff) | |
Merge branch 'x86-process-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pul x86/process updates from Ingo Molnar:
"The main change in this cycle was to add the ARCH_[GET|SET]_CPUID
prctl() ABI extension to control the availability of the CPUID
instruction, analogously to the existing PR_GET|SET_TSC ABI that
controls RDTSC.
Motivation: the 'rr' user-space record-and-replay execution debugger
would like to trap and emulate the CPUID instruction - which
instruction is normally unprivileged.
Trapping CPUID is possible on IvyBridge and later Intel CPUs - expose
this hardware capability"
* 'x86-process-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/syscalls/32: Ignore arch_prctl for other architectures
um/arch_prctl: Fix fallout from x86 arch_prctl() rework
x86/arch_prctl: Add ARCH_[GET|SET]_CPUID
x86/cpufeature: Detect CPUID faulting support
x86/syscalls/32: Wire up arch_prctl on x86-32
x86/arch_prctl: Add do_arch_prctl_common()
x86/arch_prctl/64: Rename do_arch_prctl() to do_arch_prctl_64()
x86/arch_prctl/64: Use SYSCALL_DEFINE2 to define sys_arch_prctl()
x86/arch_prctl: Rename 'code' argument to 'option'
x86/msr: Rename MISC_FEATURE_ENABLES to MISC_FEATURES_ENABLES
x86/process: Optimize TIF_NOTSC switch
x86/process: Correct and optimize TIF_BLOCKSTEP switch
x86/process: Optimize TIF checks in __switch_to_xtra()
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/compat.h | 2 | ||||
| -rw-r--r-- | include/linux/thread_info.h | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h index aef47be2a5c1..af9dbc44fd92 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -723,6 +723,8 @@ asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, int, const char __user *); +asmlinkage long compat_sys_arch_prctl(int option, unsigned long arg2); + /* * For most but not all architectures, "am I in a compat syscall?" and * "am I a compat task?" are the same question. For architectures on which diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h index 58373875e8ee..55125d674338 100644 --- a/include/linux/thread_info.h +++ b/include/linux/thread_info.h @@ -101,6 +101,10 @@ static inline void check_object_size(const void *ptr, unsigned long n, { } #endif /* CONFIG_HARDENED_USERCOPY */ +#ifndef arch_setup_new_exec +static inline void arch_setup_new_exec(void) { } +#endif + #endif /* __KERNEL__ */ #endif /* _LINUX_THREAD_INFO_H */ |