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WSL2-Linux-Kernel
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WSL2-Linux-Kernel/arch/x86/boot/cpuflags.h

20 строки
343 B
C
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x86, boot: Move CPU flags out of cpucheck Refactor the CPU flags handling out of the cpucheck routines so that they can be reused by the future ASLR routines (in order to detect CPU features like RDRAND and RDTSC). This reworks has_eflag() and has_fpu() to be used on both 32-bit and 64-bit, and refactors the calls to cpuid to make them PIC-safe on 32-bit. Signed-off-by: Kees Cook <keescook@chromium.org> Link: http://lkml.kernel.org/r/1381450698-28710-2-git-send-email-keescook@chromium.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-10-11 04:18:13 +04:00
#ifndef BOOT_CPUFLAGS_H
#define BOOT_CPUFLAGS_H
x86/cpufeature: Carve out X86_FEATURE_* Move them to a separate header and have the following dependency: x86/cpufeatures.h <- x86/processor.h <- x86/cpufeature.h This makes it easier to use the header in asm code and not include the whole cpufeature.h and add guards for asm. Suggested-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1453842730-28463-5-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-27 00:12:04 +03:00
#include <asm/cpufeatures.h>
x86, boot: Move CPU flags out of cpucheck Refactor the CPU flags handling out of the cpucheck routines so that they can be reused by the future ASLR routines (in order to detect CPU features like RDRAND and RDTSC). This reworks has_eflag() and has_fpu() to be used on both 32-bit and 64-bit, and refactors the calls to cpuid to make them PIC-safe on 32-bit. Signed-off-by: Kees Cook <keescook@chromium.org> Link: http://lkml.kernel.org/r/1381450698-28710-2-git-send-email-keescook@chromium.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-10-11 04:18:13 +04:00
#include <asm/processor-flags.h>
struct cpu_features {
int level; /* Family, or 64 for x86-64 */
int model;
u32 flags[NCAPINTS];
};
extern struct cpu_features cpu;
extern u32 cpu_vendor[3];
int has_eflag(unsigned long mask);
x86, boot: Rename get_flags() and check_flags() to *_cpuflags() When a function is used in more than one file it may not be possible to immediately tell from context what the intended meaning is. As such, it is more important that the naming be self-evident. Thus, change get_flags() to get_cpuflags(). For consistency, change check_flags() to check_cpuflags() even though it is only used in cpucheck.c. Link: http://lkml.kernel.org/r/1381450698-28710-2-git-send-email-keescook@chromium.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-10-13 15:08:56 +04:00
void get_cpuflags(void);
x86, boot: Move CPU flags out of cpucheck Refactor the CPU flags handling out of the cpucheck routines so that they can be reused by the future ASLR routines (in order to detect CPU features like RDRAND and RDTSC). This reworks has_eflag() and has_fpu() to be used on both 32-bit and 64-bit, and refactors the calls to cpuid to make them PIC-safe on 32-bit. Signed-off-by: Kees Cook <keescook@chromium.org> Link: http://lkml.kernel.org/r/1381450698-28710-2-git-send-email-keescook@chromium.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-10-11 04:18:13 +04:00
#endif