From: Li RongQing <lirongqing@baidu.com>
To: kvm@vger.kernel.org, pbonzini@redhat.com, seanjc@google.com,
vkuznets@redhat.com, lirongqing@baidu.com
Subject: [v3][PATCH 1/2] KVM: x86: don't print when fail to read/write pv eoi memory
Date: Thu, 4 Nov 2021 19:07:38 +0800 [thread overview]
Message-ID: <1636024059-53855-1-git-send-email-lirongqing@baidu.com> (raw)
If guest gives MSR_KVM_PV_EOI_EN a wrong value, this printk() will
be trigged, and kernel log is spammed with the useless message
Fixes: 0d88800d5472 ("kvm: x86: ioapic and apic debug macros cleanup")
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Li RongQing <lirongqing@baidu.com>
---
arch/x86/kvm/lapic.c | 18 ++++++------------
1 files changed, 6 insertions(+), 12 deletions(-)
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index d6ac32f..752c48e 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -676,31 +676,25 @@ static inline bool pv_eoi_enabled(struct kvm_vcpu *vcpu)
static bool pv_eoi_get_pending(struct kvm_vcpu *vcpu)
{
u8 val;
- if (pv_eoi_get_user(vcpu, &val) < 0) {
- printk(KERN_WARNING "Can't read EOI MSR value: 0x%llx\n",
- (unsigned long long)vcpu->arch.pv_eoi.msr_val);
+ if (pv_eoi_get_user(vcpu, &val) < 0)
return false;
- }
+
return val & KVM_PV_EOI_ENABLED;
}
static void pv_eoi_set_pending(struct kvm_vcpu *vcpu)
{
- if (pv_eoi_put_user(vcpu, KVM_PV_EOI_ENABLED) < 0) {
- printk(KERN_WARNING "Can't set EOI MSR value: 0x%llx\n",
- (unsigned long long)vcpu->arch.pv_eoi.msr_val);
+ if (pv_eoi_put_user(vcpu, KVM_PV_EOI_ENABLED) < 0)
return;
- }
+
__set_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention);
}
static void pv_eoi_clr_pending(struct kvm_vcpu *vcpu)
{
- if (pv_eoi_put_user(vcpu, KVM_PV_EOI_DISABLED) < 0) {
- printk(KERN_WARNING "Can't clear EOI MSR value: 0x%llx\n",
- (unsigned long long)vcpu->arch.pv_eoi.msr_val);
+ if (pv_eoi_put_user(vcpu, KVM_PV_EOI_DISABLED) < 0)
return;
- }
+
__clear_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention);
}
--
1.7.1
next reply other threads:[~2021-11-04 11:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-04 11:07 Li RongQing [this message]
2021-11-04 11:07 ` [v3][PATCH 2/2] KVM: Clear pv eoi pending bit only when it is set Li RongQing
2021-11-04 11:32 ` Vitaly Kuznetsov
2021-11-04 11:22 ` [v3][PATCH 1/2] KVM: x86: don't print when fail to read/write pv eoi memory Vitaly Kuznetsov
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