For Guest XSS, right now, only bit 11(user states) and bit 12 (supervisor states) are supported, if other bits are being set, need to modify KVM_SUPPORTED_XSS macro to have support. Signed-off-by: Zhang Yi Z <yi.z.zhang@xxxxxxxxxxxxxxx> Signed-off-by: Yang Weijiang <weijiang.yang@xxxxxxxxx> --- arch/x86/kvm/vmx.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index d32cee9ee079..68908ed7b151 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -47,6 +47,7 @@ #include <asm/virtext.h> #include <asm/mce.h> #include <asm/fpu/internal.h> +#include <asm/fpu/types.h> #include <asm/perf_event.h> #include <asm/debugreg.h> #include <asm/kexec.h> @@ -4336,12 +4337,13 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) case MSR_IA32_XSS: if (!vmx_xsaves_supported()) return 1; + /* - * The only supported bit as of Skylake is bit 8, but - * it is not supported on KVM. + * Check bits being set are supported in KVM. */ - if (data != 0) + if (data & ~kvm_supported_xss()) return 1; + vcpu->arch.ia32_xss = data; if (vcpu->arch.ia32_xss != host_xss) add_atomic_switch_msr(vmx, MSR_IA32_XSS, -- 2.17.1
