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[PATCH 3/8] x86emul: introduce a struct cpu_policy * local in x86_emulate()
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 11 Jan 2024 16:18:39 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Thu, 11 Jan 2024 15:18:43 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
While of little effect right here, future patches (AVX10, AMX,
KeyLocker) will benefit more significantly.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -1232,6 +1232,7 @@ x86_emulate(
{
/* Shadow copy of register state. Committed on successful emulation. */
struct cpu_user_regs _regs = *ctxt->regs;
+ const struct cpu_policy *cp = ctxt->cpu_policy;
struct x86_emulate_state state;
int rc;
uint8_t b, d, *opc = NULL;
@@ -3101,7 +3102,7 @@ x86_emulate(
* in fact risking to make guest OSes vulnerable to the equivalent of
* XSA-7 (CVE-2012-0217).
*/
- generate_exception_if(ctxt->cpuid->x86_vendor == X86_VENDOR_INTEL &&
+ generate_exception_if(cp->x86_vendor == X86_VENDOR_INTEL &&
op_bytes == 8 &&
!is_canonical_address(_regs.rcx),
X86_EXC_GP, 0);
#endif
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