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| author | Andi Kleen <ak@suse.de> | 2006-01-11 22:42:45 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 19:01:12 -0800 |
| commit | 39b3a7910556005a7a0d042ecb7ff98bfa84ea57 (patch) | |
| tree | efcb2602e6fd198c9af34e726741eb389fa4e292 /arch/i386/kernel/cpu/intel.c | |
| parent | 2d52ede9876ba566b583f255fdc43800eea81baa (diff) | |
| download | blackbird-op-linux-39b3a7910556005a7a0d042ecb7ff98bfa84ea57.tar.gz blackbird-op-linux-39b3a7910556005a7a0d042ecb7ff98bfa84ea57.zip | |
[PATCH] i386/x86-64: Generalize X86_FEATURE_CONSTANT_TSC flag
Define it for i386 too.
This is a synthetic flag that signifies that the CPU's TSC runs
at a constant P state invariant frequency.
Fix up the logic on x86-64/i386 to set it on all known CPUs.
Use the AMD defined bit to set it on future AMD CPUs.
Cc: venkatesh.pallipadi@intel.com
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/cpu/intel.c')
| -rw-r--r-- | arch/i386/kernel/cpu/intel.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/i386/kernel/cpu/intel.c b/arch/i386/kernel/cpu/intel.c index 5e2da704f0fa..8c0120186b9f 100644 --- a/arch/i386/kernel/cpu/intel.c +++ b/arch/i386/kernel/cpu/intel.c @@ -183,10 +183,13 @@ static void __devinit init_intel(struct cpuinfo_x86 *c) } #endif - if (c->x86 == 15) + if (c->x86 == 15) set_bit(X86_FEATURE_P4, c->x86_capability); if (c->x86 == 6) set_bit(X86_FEATURE_P3, c->x86_capability); + if ((c->x86 == 0xf && c->x86_model >= 0x03) || + (c->x86 == 0x6 && c->x86_model >= 0x0e)) + set_bit(X86_FEATURE_CONSTANT_TSC, c->x86_capability); } |
