diff options
author | Roger Pau Monné <roger.pau@citrix.com> | 2020-10-14 14:10:08 +0200 |
---|---|---|
committer | Jan Beulich <jbeulich@suse.com> | 2020-10-14 14:10:08 +0200 |
commit | 628055822452f8678c18193835fdc1e2c20d4d14 (patch) | |
tree | ebc79e3cb1e0764a978a8baf65cede17a0fafcef /xen/arch/x86/msr.c | |
parent | 875248527906e6e98812d3ff844bcccbdd594768 (diff) |
x86/msr: handle IA32_THERM_STATUS
Windows 8 will attempt to read MSR_IA32_THERM_STATUS and panic if a
#GP fault is injected as a result:
vmx.c:3035:d8v0 RDMSR 0x0000019c unimplemented
d8v0 VIRIDIAN CRASH: 3b c0000096 fffff8061de31651 fffff4088a613720 0
So handle the MSR and return 0 instead.
Note that this is done on the generic MSR handler, and PV guest will
also get 0 back when trying to read the MSR. There doesn't seem to be
much value in handling the MSR for HVM guests only.
Fixes: 84e848fd7a1 ('x86/hvm: disallow access to unknown MSRs')
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Diffstat (limited to 'xen/arch/x86/msr.c')
-rw-r--r-- | xen/arch/x86/msr.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/xen/arch/x86/msr.c b/xen/arch/x86/msr.c index 81b34fb212..9c69ef8792 100644 --- a/xen/arch/x86/msr.c +++ b/xen/arch/x86/msr.c @@ -242,6 +242,12 @@ int guest_rdmsr(struct vcpu *v, uint32_t msr, uint64_t *val) goto gp_fault; break; + case MSR_IA32_THERM_STATUS: + if ( cp->x86_vendor != X86_VENDOR_INTEL ) + goto gp_fault; + *val = 0; + break; + case MSR_X2APIC_FIRST ... MSR_X2APIC_LAST: if ( !is_hvm_domain(d) || v != curr ) goto gp_fault; |