git: c83e075d72f6 - main - amd64/vmm: Don't advertise support for performance counters

The branch main has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=c83e075d72f62c91cb27dd644a62d6a6f5bd56ba

commit c83e075d72f62c91cb27dd644a62d6a6f5bd56ba
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2026-10-14 15:55:51 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2026-10-14 15:55:51 +0000

    amd64/vmm: Don't advertise support for performance counters
    
    vmm doesn't implement them, and after commit 2272fac218a8
    ("hwpmc: Add support for AMD-only IRPERF in hwpmc PERF class"), FreeBSD
    guests fail to boot since they access the unimplemented IRPERF MSR.
    
    MFC after:      1 week
---
 sys/amd64/vmm/x86.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/sys/amd64/vmm/x86.c b/sys/amd64/vmm/x86.c
index 8d621192693f..ee6be833cc7e 100644
--- a/sys/amd64/vmm/x86.c
+++ b/sys/amd64/vmm/x86.c
@@ -137,8 +137,7 @@ x86_emulate_cpuid(struct vcpu *vcpu, uint64_t *rax, uint64_t *rbx,
 				 * unsupported or unsafe AMD extended features
 				 * (8000_0008 EBX).
 				 */
-				regs[1] &= (AMDFEID_CLZERO | AMDFEID_IRPERF |
-				    AMDFEID_XSAVEERPTR);
+				regs[1] &= AMDFEID_CLZERO | AMDFEID_XSAVEERPTR;
 
 				vm_get_topology(vm, &sockets, &cores, &threads,
 				    &maxcpus);