#define ARCH_X86_KVM_X86_H
#include <linux/kvm_host.h>
+#include <asm/fpu/xstate.h>
#include <asm/mce.h>
#include <asm/pvclock.h>
#include "kvm_cache_regs.h"
*/
static inline u64 kvm_get_filtered_xcr0(void)
{
- return kvm_caps.supported_xcr0 & xstate_get_guest_group_perm();
+ u64 permitted_xcr0 = kvm_caps.supported_xcr0;
+
+ BUILD_BUG_ON(XFEATURE_MASK_USER_DYNAMIC != XFEATURE_MASK_XTILE_DATA);
+
+ if (permitted_xcr0 & XFEATURE_MASK_USER_DYNAMIC) {
+ permitted_xcr0 &= xstate_get_guest_group_perm();
+
+ /*
+ * Treat XTILE_CFG as unsupported if the current process isn't
+ * allowed to use XTILE_DATA, as attempting to set XTILE_CFG in
+ * XCR0 without setting XTILE_DATA is architecturally illegal.
+ */
+ if (!(permitted_xcr0 & XFEATURE_MASK_XTILE_DATA))
+ permitted_xcr0 &= ~XFEATURE_MASK_XTILE_CFG;
+ }
+ return permitted_xcr0;
}
static inline bool kvm_mpx_supported(void)