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From aaf60450da6b0bc4723028aeab9ced75ee03111b Mon Sep 17 00:00:00 2001
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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Mon, 22 Jul 2019 18:22:20 +0100
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Subject: [PATCH 39/39] i386/kvm: Do not sync nested state during runtime
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RH-Author: Paolo Bonzini <pbonzini@redhat.com>
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Message-id: <20190722182220.19374-19-pbonzini@redhat.com>
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Patchwork-id: 89635
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O-Subject: [RHEL-8.1.0 PATCH qemu-kvm v3 18/18] i386/kvm: Do not sync nested state during runtime
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Bugzilla: 1689269
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RH-Acked-by: Peter Xu <zhexu@redhat.com>
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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From: Jan Kiszka <jan.kiszka@siemens.com>
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Writing the nested state e.g. after a vmport access can invalidate
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important parts of the kernel-internal state, and it is not needed as
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well. So leave this out from KVM_PUT_RUNTIME_STATE.
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Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
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Message-Id: <bdd53f40-4e60-f3ae-7ec6-162198214953@siemens.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit 20b25d239ab7a94bb8bff3d0f13a9527ee75cf10)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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target/i386/kvm.c | 10 +++++-----
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1 file changed, 5 insertions(+), 5 deletions(-)
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diff --git a/target/i386/kvm.c b/target/i386/kvm.c
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index 8648f1f..da5f07e 100644
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--- a/target/i386/kvm.c
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+++ b/target/i386/kvm.c
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@@ -3014,12 +3014,12 @@ int kvm_arch_put_registers(CPUState *cpu, int level)
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assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu));
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- ret = kvm_put_nested_state(x86_cpu);
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- if (ret < 0) {
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- return ret;
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- }
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-
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if (level >= KVM_PUT_RESET_STATE) {
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+ ret = kvm_put_nested_state(x86_cpu);
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+ if (ret < 0) {
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+ return ret;
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+ }
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+
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ret = kvm_put_msr_feature_control(x86_cpu);
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if (ret < 0) {
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return ret;
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--
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1.8.3.1
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