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Message-ID: <lsq.1519831221.890860338@decadent.org.uk>
Date: Wed, 28 Feb 2018 15:20:21 +0000
From: Ben Hutchings <ben@...adent.org.uk>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC: akpm@...ux-foundation.org, "Chegu Vinod" <chegu_vinod@...com>,
"Gleb Natapov" <gleb@...hat.com>, "Avi Kivity" <avi@...hat.com>
Subject: [PATCH 3.2 012/140] KVM: apic: fix LDR calculation in x2apic mode
3.2.100-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Gleb Natapov <gleb@...hat.com>
commit 7f46ddbd487e0d0528d89534fdfb31d885977804 upstream.
Signed-off-by: Gleb Natapov <gleb@...hat.com>
Reviewed-by: Chegu Vinod <chegu_vinod@...com>
Tested-by: Chegu Vinod <chegu_vinod@...com>
Signed-off-by: Avi Kivity <avi@...hat.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
arch/x86/kvm/lapic.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1022,7 +1022,7 @@ void kvm_lapic_set_base(struct kvm_vcpu
vcpu->arch.apic_base = value;
if (apic_x2apic_mode(apic)) {
u32 id = kvm_apic_id(apic);
- u32 ldr = ((id & ~0xf) << 16) | (1 << (id & 0xf));
+ u32 ldr = ((id >> 4) << 16) | (1 << (id & 0xf));
apic_set_reg(apic, APIC_LDR, ldr);
}
apic->base_address = apic->vcpu->arch.apic_base &
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