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| author | Borislav Petkov <petkovbb@googlemail.com> | 2009-08-31 11:50:09 +0400 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-09-01 02:14:26 +0400 |
| commit | 132ec92f3f70fe365c1f4b8d46e66cf8a2a16880 (patch) | |
| tree | f8e3f3ab5541f583030b0bcd5f3f81ca338f77a2 /arch/x86/kernel/paravirt.c | |
| parent | 366d19e181be873c70f4aafca3931d77d781ccd7 (diff) | |
| download | linux-132ec92f3f70fe365c1f4b8d46e66cf8a2a16880.tar.xz | |
x86, msr: Add rd/wrmsr interfaces with preset registers
native_{rdmsr,wrmsr}_safe_regs are two new interfaces which allow
presetting of a subset of eight x86 GPRs before executing the rd/wrmsr
instructions. This is needed at least on AMD K8 for accessing an erratum
workaround MSR.
Originally based on an idea by H. Peter Anvin.
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
LKML-Reference: <1251705011-18636-1-git-send-email-petkovbb@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel/paravirt.c')
| -rw-r--r-- | arch/x86/kernel/paravirt.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 70ec9b951d76..67594af43b38 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -362,8 +362,10 @@ struct pv_cpu_ops pv_cpu_ops = { #endif .wbinvd = native_wbinvd, .read_msr = native_read_msr_safe, + .rdmsr_regs = native_rdmsr_safe_regs, .read_msr_amd = native_read_msr_amd_safe, .write_msr = native_write_msr_safe, + .wrmsr_regs = native_wrmsr_safe_regs, .read_tsc = native_read_tsc, .read_pmc = native_read_pmc, .read_tscp = native_read_tscp, |