From: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
To: <pbonzini@redhat.com>, <rkrcmar@redhat.com>, <joro@8bytes.org>,
<bp@alien8.de>, <gleb@kernel.org>, <alex.williamson@redhat.com>
Cc: <kvm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<wei@redhat.com>, <sherry.hurwitz@amd.com>,
Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Subject: [PART1 RFC v2 09/10] svm: Do not intercept CR8 when enable AVIC
Date: Fri, 4 Mar 2016 14:46:07 -0600 [thread overview]
Message-ID: <1457124368-2025-10-git-send-email-Suravee.Suthikulpanit@amd.com> (raw)
In-Reply-To: <1457124368-2025-1-git-send-email-Suravee.Suthikulpanit@amd.com>
When enable AVIC:
* Do not intercept CR8 since this should be handled by AVIC HW.
* Also update TPR in APIC backing page when syncing CR8 before VMRUN
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
---
arch/x86/kvm/svm.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 02cd8d0..5142861 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -986,6 +986,9 @@ static __init int svm_hardware_setup(void)
if (avic) {
printk(KERN_INFO "kvm: AVIC enabled\n");
+
+ /* Do not do cr8 intercept if AVIC is enabled. */
+ svm_x86_ops.update_cr8_intercept = NULL;
} else {
svm_x86_ops.deliver_posted_interrupt = NULL;
}
@@ -1116,7 +1119,8 @@ static void init_vmcb(struct vcpu_svm *svm)
set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
set_cr_intercept(svm, INTERCEPT_CR3_WRITE);
set_cr_intercept(svm, INTERCEPT_CR4_WRITE);
- set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
+ if (!avic)
+ set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
set_dr_intercepts(svm);
@@ -4277,7 +4281,8 @@ static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
{
struct vcpu_svm *svm = to_svm(vcpu);
- if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
+ if ((is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) ||
+ avic)
return;
clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
@@ -4472,8 +4477,10 @@ static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
return;
- cr8 = kvm_get_cr8(vcpu);
- svm->vmcb->control.v_tpr = cr8 & V_TPR_MASK;
+ svm->vmcb->control.v_tpr = cr8 = kvm_get_cr8(vcpu) & V_TPR_MASK;
+
+ if (avic)
+ *(avic_get_bk_page_entry(svm, APIC_TASKPRI)) = (u32)cr8 << 4;
}
static void svm_complete_interrupts(struct vcpu_svm *svm)
--
1.9.1
next prev parent reply other threads:[~2016-03-04 20:49 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-04 20:45 [PART1 RFC v2 00/10] KVM: x86: Introduce SVM AVIC support Suravee Suthikulpanit
2016-03-04 20:45 ` [PART1 RFC v2 01/10] KVM: x86: Misc LAPIC changes to exposes helper functions Suravee Suthikulpanit
2016-03-04 20:46 ` [PART1 RFC v2 02/10] KVM: x86: Introducing kvm_x86_ops VCPU blocking/unblocking Suravee Suthikulpanit
2016-03-07 15:42 ` Paolo Bonzini
2016-03-14 6:19 ` Suravee Suthikulpanit
2016-03-04 20:46 ` [PART1 RFC v2 03/10] svm: Introduce new AVIC VMCB registers Suravee Suthikulpanit
2016-03-07 15:44 ` Paolo Bonzini
2016-03-14 7:41 ` Suravee Suthikulpanit
2016-03-14 12:25 ` Paolo Bonzini
2016-03-15 12:51 ` Suravee Suthikulpanit
2016-03-04 20:46 ` [PART1 RFC v2 04/10] svm: clean up V_TPR, V_IRQ, V_INTR_PRIO, and V_INTR_MASKING Suravee Suthikulpanit
2016-03-04 20:46 ` [PART1 RFC v2 05/10] KVM: x86: Detect and Initialize AVIC support Suravee Suthikulpanit
2016-03-07 16:41 ` Paolo Bonzini
2016-03-15 17:09 ` Suravee Suthikulpanit
2016-03-15 17:22 ` Paolo Bonzini
2016-03-16 6:22 ` Suravee Suthikulpanit
2016-03-16 7:20 ` Paolo Bonzini
2016-03-16 8:21 ` Suravee Suthikulpanit
2016-03-16 11:12 ` Paolo Bonzini
2016-03-04 20:46 ` [PART1 RFC v2 06/10] svm: Add interrupt injection via AVIC Suravee Suthikulpanit
2016-03-07 15:36 ` Paolo Bonzini
2016-03-08 21:54 ` Radim Krčmář
2016-03-09 11:10 ` Paolo Bonzini
2016-03-09 16:00 ` Radim Krčmář
2016-03-14 9:41 ` Suravee Suthikulpanit
2016-03-14 12:27 ` Paolo Bonzini
2016-03-14 9:50 ` Suravee Suthikulpanit
2016-03-14 5:25 ` Suravee Suthikulpanit
2016-03-14 8:54 ` Suravee Suthikulpanit
2016-03-04 20:46 ` [PART1 RFC v2 07/10] svm: Add VMEXIT handlers for AVIC Suravee Suthikulpanit
2016-03-07 15:58 ` Paolo Bonzini
2016-03-08 22:05 ` Radim Krčmář
2016-03-09 10:56 ` Paolo Bonzini
2016-03-09 20:55 ` Radim Krčmář
2016-03-10 19:34 ` Radim Krčmář
2016-03-10 19:54 ` Paolo Bonzini
2016-03-10 20:44 ` Radim Krčmář
2016-03-17 3:58 ` Suravee Suthikulpanit
2016-03-17 9:35 ` Paolo Bonzini
2016-03-17 19:44 ` Suravee Suthikulpanit
2016-03-17 20:27 ` [PATCH] KVM: split kvm_vcpu_wake_up from kvm_vcpu_kick Radim Krčmář
2016-03-18 5:13 ` Suravee Suthikulpanit
2016-03-04 20:46 ` [PART1 RFC v2 08/10] svm: Do not expose x2APIC when enable AVIC Suravee Suthikulpanit
2016-03-04 20:46 ` Suravee Suthikulpanit [this message]
2016-03-07 15:39 ` [PART1 RFC v2 09/10] svm: Do not intercept CR8 " Paolo Bonzini
2016-03-14 6:09 ` Suravee Suthikulpanit
2016-03-14 12:28 ` Paolo Bonzini
2016-03-04 20:46 ` [PART1 RFC v2 10/10] svm: Manage vcpu load/unload " Suravee Suthikulpanit
2016-03-09 21:46 ` Radim Krčmář
2016-03-10 14:01 ` Radim Krčmář
2016-03-14 11:58 ` Suravee Suthikulpanit
2016-03-14 16:54 ` Radim Krčmář
2016-03-14 11:48 ` Suravee Suthikulpanit
2016-03-14 16:40 ` Radim Krčmář
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