diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-05-06 05:37:24 -1000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-05-06 05:37:24 -1000 |
| commit | 9c48eb6aabf0d180159c128403c366aab80a57a6 (patch) | |
| tree | 0ba530aecdf5d6d88738a2cf06711b3b1dded64f | |
| parent | fe282c609d0a5da0607a21ffa9ef49849bd7524d (diff) | |
| parent | c65732e4f72124ca5a3a0dd3bee0d3cee39c7170 (diff) | |
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fix from Thomas Gleixner:
"Unbreak the CPUID CPUID_8000_0008_EBX reload which got dropped when
the evaluation of physical and virtual bits which uses the same CPUID
leaf was moved out of get_cpu_cap()"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu: Restore CPUID_8000_0008_EBX reload
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 8a5b185735e1..ce243f7d2d4e 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -848,6 +848,11 @@ void get_cpu_cap(struct cpuinfo_x86 *c) c->x86_power = edx; } + if (c->extended_cpuid_level >= 0x80000008) { + cpuid(0x80000008, &eax, &ebx, &ecx, &edx); + c->x86_capability[CPUID_8000_0008_EBX] = ebx; + } + if (c->extended_cpuid_level >= 0x8000000a) c->x86_capability[CPUID_8000_000A_EDX] = cpuid_edx(0x8000000a); @@ -871,7 +876,6 @@ static void get_cpu_address_sizes(struct cpuinfo_x86 *c) c->x86_virt_bits = (eax >> 8) & 0xff; c->x86_phys_bits = eax & 0xff; - c->x86_capability[CPUID_8000_0008_EBX] = ebx; } #ifdef CONFIG_X86_32 else if (cpu_has(c, X86_FEATURE_PAE) || cpu_has(c, X86_FEATURE_PSE36)) |