[PATCH v2 08/23] KVM: SVM: Fix x2APIC Logical ID calculation for avic_kick_target_vcpus_fast

Sean Christopherson
2022-09-03T00:23:41Z

From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>

For X2APIC ID in cluster mode, the logical ID is bit [15:0].

Fixes: 603ccef42ce9 ("KVM: x86: SVM: fix avic_kick_target_vcpus_fast")
Cc: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/kvm/svm/avic.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c
index 50721c9167c4..163edc42f979 100644
--- a/arch/x86/kvm/svm/avic.c
+++ b/arch/x86/kvm/svm/avic.c
@@ -383,7 +383,7 @@ static int avic_kick_target_vcpus_fast(struct kvm *kvm, struct kvm_lapic *source

if (apic_x2apic_mode(source)) {
/* 16 bit dest mask, 16 bit cluster id */
- bitmap = dest & 0xFFFF0000;
+ bitmap = dest & 0xFFFF;
cluster = (dest >> 16) << 4;
} else if (kvm_lapic_get_reg(source, APIC_DFR) == APIC_DFR_FLAT) {
/* 8 bit dest mask*/
--
2.37.2.789.g6183377224-goog