forked from rpms/qemu-kvm
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48 lines
1.7 KiB
48 lines
1.7 KiB
1 month ago
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From c7649ac1b958dc48de50f32b1ad80d84b17945a8 Mon Sep 17 00:00:00 2001
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From: Michael Roth <michael.roth@amd.com>
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Date: Thu, 30 May 2024 06:16:29 -0500
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Subject: [PATCH 069/100] i386/sev: Set CPU state to protected once SNP guest
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payload is finalized
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RH-Author: Paolo Bonzini <pbonzini@redhat.com>
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RH-MergeRequest: 245: SEV-SNP support
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RH-Jira: RHEL-39544
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Bandan Das <bdas@redhat.com>
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RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
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RH-Commit: [69/91] 09280f987a186511ec7d62c3f340b2148e8556d7 (bonzini/rhel-qemu-kvm)
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Once KVM_SNP_LAUNCH_FINISH is called the vCPU state is copied into the
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vCPU's VMSA page and measured/encrypted. Any attempt to read/write CPU
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state afterward will only be acting on the initial data and so are
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effectively no-ops.
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Set the vCPU state to protected at this point so that QEMU don't
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continue trying to re-sync vCPU data during guest runtime.
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Signed-off-by: Michael Roth <michael.roth@amd.com>
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Signed-off-by: Pankaj Gupta <pankaj.gupta@amd.com>
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Message-ID: <20240530111643.1091816-18-pankaj.gupta@amd.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit 3d44fdff60ea66fbd7a33f5d32b50843cd80f48a)
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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---
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target/i386/sev.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/target/i386/sev.c b/target/i386/sev.c
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index ef2e592ca7..e84e4395a5 100644
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--- a/target/i386/sev.c
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+++ b/target/i386/sev.c
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@@ -997,6 +997,7 @@ sev_snp_launch_finish(SevCommonState *sev_common)
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exit(1);
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}
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+ kvm_mark_guest_state_protected();
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sev_set_guest_state(sev_common, SEV_STATE_RUNNING);
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/* add migration blocker */
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--
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2.39.3
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