From: "Radim Krčmář" <rkrcmar@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Nadav Amit <namit@cs.technion.ac.il>,
Gleb Natapov <gleb@kernel.org>
Subject: [PATCH 4/8] KVM: x86: fix x2apic logical address matching
Date: Thu, 29 Jan 2015 22:48:51 +0100 [thread overview]
Message-ID: <1422568135-28402-5-git-send-email-rkrcmar@redhat.com> (raw)
In-Reply-To: <1422568135-28402-1-git-send-email-rkrcmar@redhat.com>
We cannot hit the bug now, but future patches will expose this path.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
---
arch/x86/kvm/lapic.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 0ee743c6b4f1..aae043f38548 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -602,7 +602,8 @@ static bool kvm_apic_match_logical_addr(struct kvm_lapic *apic, u32 mda)
logical_id = kvm_apic_get_reg(apic, APIC_LDR);
if (apic_x2apic_mode(apic))
- return logical_id & mda;
+ return ((logical_id >> 16) == (mda >> 16))
+ && (logical_id & mda & 0xffff);
logical_id = GET_APIC_LOGICAL_ID(logical_id);
--
2.2.2
next prev parent reply other threads:[~2015-01-29 21:51 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-29 21:48 [PATCH 0/8] KVM: minor APIC fixes and cleanups Radim Krčmář
2015-01-29 21:48 ` [PATCH 1/8] KVM: x86: return bool from kvm_apic_match*() Radim Krčmář
2015-01-29 22:10 ` Joe Perches
2015-01-30 8:50 ` Paolo Bonzini
2015-01-29 21:48 ` [PATCH 2/8] KVM: x86: cleanup kvm_apic_match_*() Radim Krčmář
2015-01-30 8:52 ` Paolo Bonzini
2015-01-30 13:06 ` Radim Krčmář
2015-02-02 14:26 ` Radim Krčmář
2015-02-02 14:28 ` Paolo Bonzini
2015-02-02 14:30 ` Radim Krčmář
2015-02-02 14:29 ` Radim Krčmář
2015-01-29 21:48 ` [PATCH 3/8] KVM: x86: replace 0 with APIC_DEST_PHYSICAL Radim Krčmář
2015-01-29 21:48 ` Radim Krčmář [this message]
2015-01-29 21:48 ` [PATCH 5/8] KVM: x86: use MDA for interrupt matching Radim Krčmář
2015-01-30 9:03 ` Paolo Bonzini
2015-01-30 13:09 ` Radim Krčmář
2015-01-29 21:48 ` [PATCH 6/8] KVM: x86: allow mixed APIC mode broadcast Radim Krčmář
2015-01-29 21:48 ` [PATCH 7/8] KVM: x86: avoid logical_map when it is invalid Radim Krčmář
2015-01-30 9:19 ` Paolo Bonzini
2015-01-30 14:21 ` Radim Krčmář
2015-01-30 14:21 ` Paolo Bonzini
2015-01-30 9:38 ` Paolo Bonzini
2015-01-30 14:56 ` Radim Krčmář
2015-01-30 15:10 ` Paolo Bonzini
2015-01-30 17:09 ` Radim Krčmář
2015-01-29 21:48 ` [PATCH 8/8] KVM: x86: simplify kvm_apic_map Radim Krčmář
2015-01-30 9:18 ` Paolo Bonzini
2015-01-30 15:14 ` Radim Krčmář
2015-01-30 15:23 ` Paolo Bonzini
2015-01-30 16:57 ` Radim Krčmář
2015-01-30 21:15 ` Paolo Bonzini
2015-01-30 9:22 ` [PATCH 0/8] KVM: minor APIC fixes and cleanups Paolo Bonzini
2015-01-30 15:20 ` Radim Krčmář
2015-01-30 15:24 ` Paolo Bonzini
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