From 0c4ff0866fc1b0bf8c1d8d5f27fedc6dd9c51183 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Fri, 5 Dec 2025 16:17:16 -0800 Subject: [PATCH] KVM: VMX: Set MSR index auto-load entry if and only if entry is "new" When adding an MSR to the auto-load lists, update the MSR index in the list entry if and only if a new entry is being inserted, as 'i' can only be non-negative if vmx_find_loadstore_msr_slot() found an entry with the MSR's index. Unnecessarily setting the index is benign, but it makes it harder to see that updating the value is necessary even when an existing entry for the MSR was found. No functional change intended. Reviewed-by: Dapeng Mi Tested-by: Manali Shukla Link: https://patch.msgid.link/20251206001720.468579-41-seanjc@google.com Signed-off-by: Sean Christopherson --- arch/x86/kvm/vmx/vmx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 2c50ebf4ff1bf..be2a2580e8f1b 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -1141,16 +1141,16 @@ static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr, if (i < 0) { i = m->guest.nr++; + m->guest.val[i].index = msr; vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->guest.nr); } - m->guest.val[i].index = msr; m->guest.val[i].value = guest_val; if (j < 0) { j = m->host.nr++; + m->host.val[j].index = msr; vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->host.nr); } - m->host.val[j].index = msr; m->host.val[j].value = host_val; } -- 2.47.3