Il 18/06/2014 18:59, Valentine Sinitsyn ha scritto:
I also noticed that setting PAT MSR from the nested hypervisor leaves
high word unassigned, i.e. the code like this:
mov $0x70106, %rax
mov %rax, %rdx
mov $0x0277, %rcx
wrmsr
rdmsr
yields %rax = 0, %rdx = 0x70106.
This should be the trivial fix:
diff --git a/arch/x86/include/asm/kvm_host.h
b/arch/x86/include/asm/kvm_host.h
index 0b140dc65bee..8a1cdc0f8fe7 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -461,7 +461,7 @@ struct kvm_vcpu_arch {
bool nmi_injected; /* Trying to inject an NMI this entry */
struct mtrr_state_type mtrr_state;
- u32 pat;
+ u64 pat;
unsigned switch_db_regs;
unsigned long db[KVM_NR_DB_REGS];
Paolo
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