[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 04/10] x86/hvm: pkeys, add pkeys support when setting CR4
On 20/11/15 01:16, Wu, Feng wrote: >> diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c >> index 66917ff..953047f 100644 >> --- a/xen/arch/x86/hvm/hvm.c >> +++ b/xen/arch/x86/hvm/hvm.c >> @@ -1911,6 +1911,7 @@ static unsigned long >> hvm_cr4_guest_reserved_bits(const struct vcpu *v, >> leaf1_edx = boot_cpu_data.x86_capability[X86_FEATURE_VME / 32]; >> leaf1_ecx = boot_cpu_data.x86_capability[X86_FEATURE_PCID / 32]; >> leaf7_0_ebx = boot_cpu_data.x86_capability[X86_FEATURE_FSGSBASE / >> 32]; >> + leaf7_0_ecx = boot_cpu_data.x86_capability[X86_FEATURE_PKU / 32]; > What is the purpose of the above change? So the hunk below can correctly audit a guests attempt to set CR4.PKE. ~Andrew > >> } >> >> return ~(unsigned long) >> @@ -1946,7 +1947,9 @@ static unsigned long >> hvm_cr4_guest_reserved_bits(const struct vcpu *v, >> (leaf7_0_ebx & cpufeat_mask(X86_FEATURE_SMEP) ? >> X86_CR4_SMEP : 0) | >> (leaf7_0_ebx & cpufeat_mask(X86_FEATURE_SMAP) ? >> - X86_CR4_SMAP : 0)); >> + X86_CR4_SMAP : 0) | >> + (leaf7_0_ecx & cpufeat_mask(X86_FEATURE_PKU) ? >> + X86_CR4_PKE : 0)); >> } >> >> static int hvm_load_cpu_ctxt(struct domain *d, hvm_domain_context_t *h) _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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