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| author | Keir Fraser <keir.fraser@citrix.com> | 2010-08-13 08:59:52 +0100 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2010-08-13 08:59:52 +0100 |
| commit | aeaef912f86154a70f502a581928f7116e4c0af3 (patch) | |
| tree | f8edc5e2569ea4d4b8e1a0b924551c9c3ac052a1 | |
| parent | 847c5ecffed4c48a2b8fbef6dfb999a474dda5b3 (diff) | |
| download | xen-aeaef912f86154a70f502a581928f7116e4c0af3.tar.gz xen-aeaef912f86154a70f502a581928f7116e4c0af3.tar.bz2 xen-aeaef912f86154a70f502a581928f7116e4c0af3.zip | |
x86: Allow dom0 pstate control to access APERF/MPERF/HWCR MSRs
The current version of the powernow driver uses the APERF/MPEF
and the HWCR MSRs. Add cases in traps.c to let dom0 access
those MSRs.
Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
xen-unstable changeset: 6471b8b71401
xen-unstable date: Fri Aug 13 08:38:35 2010 +0100
| -rw-r--r-- | xen/arch/x86/traps.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c index 1834314f3d..d9a8a52f28 100644 --- a/xen/arch/x86/traps.c +++ b/xen/arch/x86/traps.c @@ -2220,6 +2220,7 @@ static int emulate_privileged_op(struct cpu_user_regs *regs) case MSR_K8_PSTATE5: case MSR_K8_PSTATE6: case MSR_K8_PSTATE7: + case MSR_K8_HWCR: if ( boot_cpu_data.x86_vendor != X86_VENDOR_AMD ) goto fail; if ( !is_cpufreq_controller(v->domain) ) @@ -2259,6 +2260,14 @@ static int emulate_privileged_op(struct cpu_user_regs *regs) break; case MSR_IA32_MPERF: case MSR_IA32_APERF: + if (( boot_cpu_data.x86_vendor != X86_VENDOR_INTEL ) && + ( boot_cpu_data.x86_vendor != X86_VENDOR_AMD ) ) + goto fail; + if ( !is_cpufreq_controller(v->domain) ) + break; + if ( wrmsr_safe(regs->ecx, eax, edx) != 0 ) + goto fail; + break; case MSR_IA32_PERF_CTL: if ( boot_cpu_data.x86_vendor != X86_VENDOR_INTEL ) goto fail; |