diff options
| author | Borislav Petkov <bp@suse.de> | 2016-02-03 11:33:40 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-02-09 10:41:17 (GMT) |
| commit | c416e6117575213a5a962149620684a09f9e4ece (patch) | |
| tree | d2c1cba034278b0775ca1f2cbacd365314be70c0 /arch/x86/kernel/cpu/microcode/intel.c | |
| parent | 26cbaa4dc676a444aa626cbc642c4c8181ef1378 (diff) | |
| download | linux-c416e6117575213a5a962149620684a09f9e4ece.tar.xz | |
x86/microcode/intel: Use *wrmsrl variants
... and drop the 32-bit casting games which we had to do at the time
because wrmsr() was unforgiving then, see c3fd0bd5e19a from the
full history tree:
commit c3fd0bd5e19aaff9cdd104edff136a2023db657e
Author: Linus Torvalds <torvalds@home.osdl.org>
Date: Tue Feb 17 23:23:41 2004 -0800
Fix up the microcode update on regular 32-bit x86. Our wrmsr()
is a bit unforgiving and really doesn't like 64-bit values.
...
Tested-by: Thomas Voegtle <tv@lio96.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
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/1454499225-21544-13-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/cpu/microcode/intel.c')
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/intel.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c index 35186a0..ff0b449 100644 --- a/arch/x86/kernel/cpu/microcode/intel.c +++ b/arch/x86/kernel/cpu/microcode/intel.c @@ -370,7 +370,7 @@ static int collect_cpu_info_early(struct ucode_cpu_info *uci) native_rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]); csig.pf = 1 << ((val[1] >> 18) & 7); } - native_wrmsr(MSR_IA32_UCODE_REV, 0, 0); + native_wrmsrl(MSR_IA32_UCODE_REV, 0); /* As documented in the SDM: Do a CPUID 1 here */ sync_core(); @@ -648,10 +648,8 @@ static int apply_microcode_early(struct ucode_cpu_info *uci, bool early) return 0; /* write microcode via MSR 0x79 */ - native_wrmsr(MSR_IA32_UCODE_WRITE, - (unsigned long)mc->bits, - (unsigned long)mc->bits >> 16 >> 16); - native_wrmsr(MSR_IA32_UCODE_REV, 0, 0); + native_wrmsrl(MSR_IA32_UCODE_WRITE, (unsigned long)mc->bits); + native_wrmsrl(MSR_IA32_UCODE_REV, 0); /* As documented in the SDM: Do a CPUID 1 here */ sync_core(); @@ -860,10 +858,8 @@ static int apply_microcode_intel(int cpu) return 0; /* write microcode via MSR 0x79 */ - wrmsr(MSR_IA32_UCODE_WRITE, - (unsigned long) mc->bits, - (unsigned long) mc->bits >> 16 >> 16); - wrmsr(MSR_IA32_UCODE_REV, 0, 0); + wrmsrl(MSR_IA32_UCODE_WRITE, (unsigned long)mc->bits); + wrmsrl(MSR_IA32_UCODE_REV, 0); /* As documented in the SDM: Do a CPUID 1 here */ sync_core(); |