From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Joerg Roedel" <joro@8bytes.org>,
"Jim Mattson" <jmattson@google.com>
Subject: [PATCH RFC 3/5] x86: KVM: svm: clear interrupt shadow on all paths in skip_emulated_instruction()
Date: Thu, 20 Jun 2019 13:02:38 +0200 [thread overview]
Message-ID: <20190620110240.25799-4-vkuznets@redhat.com> (raw)
In-Reply-To: <20190620110240.25799-1-vkuznets@redhat.com>
Regardless of the way how we skip instruction, interrupt shadow needs to be
cleared.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/svm.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 68f1f0218c95..f980fc43372d 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -783,13 +783,15 @@ static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
EMULATE_DONE)
pr_err_once("KVM: %s: unable to skip instruction\n",
__func__);
- return;
+ goto clear_int_shadow;
}
if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n",
__func__, kvm_rip_read(vcpu), svm->next_rip);
kvm_rip_write(vcpu, svm->next_rip);
+
+clear_int_shadow:
svm_set_interrupt_shadow(vcpu, 0);
}
--
2.20.1
next prev parent reply other threads:[~2019-06-20 11:03 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-20 11:02 [PATCH RFC 0/5] x86/KVM/svm: get rid of hardcoded instructions lengths Vitaly Kuznetsov
2019-06-20 11:02 ` [PATCH RFC 1/5] x86: KVM: svm: don't pretend to advance RIP in case wrmsr_interception() results in #GP Vitaly Kuznetsov
2019-06-20 18:49 ` Jim Mattson
2019-06-21 8:42 ` Vitaly Kuznetsov
2019-06-20 11:02 ` [PATCH RFC 2/5] x86: KVM: svm: avoid flooding logs when skip_emulated_instruction() fails Vitaly Kuznetsov
2019-06-20 18:45 ` Jim Mattson
2019-06-20 11:02 ` Vitaly Kuznetsov [this message]
2019-06-20 18:44 ` [PATCH RFC 3/5] x86: KVM: svm: clear interrupt shadow on all paths in skip_emulated_instruction() Jim Mattson
2019-06-21 8:43 ` Vitaly Kuznetsov
2019-07-31 13:50 ` Vitaly Kuznetsov
2019-07-31 16:37 ` Paolo Bonzini
2019-07-31 20:27 ` Jim Mattson
2019-07-31 23:37 ` Sean Christopherson
2019-07-31 23:45 ` Jim Mattson
2019-07-31 23:56 ` Sean Christopherson
2019-08-01 0:13 ` Paolo Bonzini
2019-08-01 0:17 ` Jim Mattson
2019-06-20 11:02 ` [PATCH RFC 4/5] x86: KVM: add xsetbv to the emulator Vitaly Kuznetsov
2019-06-20 12:18 ` Paolo Bonzini
2019-07-31 13:07 ` Vitaly Kuznetsov
2019-07-31 13:14 ` Paolo Bonzini
2019-06-20 11:02 ` [PATCH RFC 5/5] x86: KVM: svm: remove hardcoded instruction length from intercepts Vitaly Kuznetsov
2019-06-20 18:41 ` Jim Mattson
2019-06-20 12:14 ` [PATCH RFC 0/5] x86/KVM/svm: get rid of hardcoded instructions lengths Paolo Bonzini
2019-06-20 12:26 ` Vitaly Kuznetsov
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