diff options
| author | H. Peter Anvin <hpa@zytor.com> | 2007-07-11 12:18:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-12 10:55:54 -0700 |
| commit | ec481536b15eb0520d8f0204b0294480050fe1f8 (patch) | |
| tree | 3f959a26ca58477734ea1e4d5370b2d3a33a1680 /arch/x86_64/kernel/verify_cpu.S | |
| parent | f8c09377d754f35a135454181b869ab527cc0757 (diff) | |
| download | lwn-ec481536b15eb0520d8f0204b0294480050fe1f8.tar.gz lwn-ec481536b15eb0520d8f0204b0294480050fe1f8.zip | |
Unify the CPU features vectors between i386 and x86-64
Unify the handling of the CPU features vectors between i386 and x86-64.
This also adopts the collapsing of features which are required at
compile-time into constant tests from x86-64 to i386.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64/kernel/verify_cpu.S')
| -rw-r--r-- | arch/x86_64/kernel/verify_cpu.S | 22 |
1 files changed, 4 insertions, 18 deletions
diff --git a/arch/x86_64/kernel/verify_cpu.S b/arch/x86_64/kernel/verify_cpu.S index e035f5948199..45b6f8a975a1 100644 --- a/arch/x86_64/kernel/verify_cpu.S +++ b/arch/x86_64/kernel/verify_cpu.S @@ -37,20 +37,6 @@ verify_cpu: pushl $0 # Kill any dangerous flags popfl - /* minimum CPUID flags for x86-64 as defined by AMD */ -#define M(x) (1<<(x)) -#define M2(a,b) M(a)|M(b) -#define M4(a,b,c,d) M(a)|M(b)|M(c)|M(d) - -#define SSE_MASK \ - (M2(X86_FEATURE_XMM,X86_FEATURE_XMM2)) -#define REQUIRED_MASK1 \ - (M4(X86_FEATURE_FPU,X86_FEATURE_PSE,X86_FEATURE_TSC,X86_FEATURE_MSR)|\ - M4(X86_FEATURE_PAE,X86_FEATURE_CX8,X86_FEATURE_PGE,X86_FEATURE_CMOV)|\ - M(X86_FEATURE_FXSR)) -#define REQUIRED_MASK2 \ - (M(X86_FEATURE_LM - 32)) - pushfl # standard way to check for cpuid popl %eax movl %eax,%ebx @@ -79,8 +65,8 @@ verify_cpu: verify_cpu_noamd: movl $0x1,%eax # Does the cpu have what it takes cpuid - andl $REQUIRED_MASK1,%edx - xorl $REQUIRED_MASK1,%edx + andl $REQUIRED_MASK0,%edx + xorl $REQUIRED_MASK0,%edx jnz verify_cpu_no_longmode movl $0x80000000,%eax # See if extended cpuid is implemented @@ -90,8 +76,8 @@ verify_cpu_noamd: movl $0x80000001,%eax # Does the cpu have what it takes cpuid - andl $REQUIRED_MASK2,%edx - xorl $REQUIRED_MASK2,%edx + andl $REQUIRED_MASK1,%edx + xorl $REQUIRED_MASK1,%edx jnz verify_cpu_no_longmode verify_cpu_sse_test: |