forked from rpms/qemu-kvm
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59 lines
2.2 KiB
59 lines
2.2 KiB
1 month ago
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From 4331180aa09e44550ff8de781c618bae5e99bb70 Mon Sep 17 00:00:00 2001
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From: Michael Roth <michael.roth@amd.com>
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Date: Tue, 9 Apr 2024 18:07:43 -0500
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Subject: [PATCH 025/100] hw/i386/sev: Use legacy SEV VM types for older
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machine types
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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: [25/91] 8c73cd312736ccb0818b4d3216fd13712f21f3c9 (bonzini/rhel-qemu-kvm)
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Newer 9.1 machine types will default to using the KVM_SEV_INIT2 API for
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creating SEV/SEV-ES going forward. However, this API results in guest
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measurement changes which are generally not expected for users of these
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older guest types and can cause disruption if they switch to a newer
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QEMU/kernel version. Avoid this by continuing to use the older
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KVM_SEV_INIT/KVM_SEV_ES_INIT APIs for older machine types.
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Signed-off-by: Michael Roth <michael.roth@amd.com>
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Message-ID: <20240409230743.962513-4-michael.roth@amd.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit ea7fbd37537b3a598335c21ccb2ea674630fc810)
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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---
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hw/i386/pc.c | 1 +
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target/i386/sev.c | 1 +
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2 files changed, 2 insertions(+)
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diff --git a/hw/i386/pc.c b/hw/i386/pc.c
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index b9fde3cec1..1a34bc4522 100644
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--- a/hw/i386/pc.c
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+++ b/hw/i386/pc.c
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@@ -351,6 +351,7 @@ const size_t pc_rhel_compat_len = G_N_ELEMENTS(pc_rhel_compat);
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GlobalProperty pc_rhel_9_5_compat[] = {
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/* pc_rhel_9_5_compat from pc_compat_pc_9_0 (backported from 9.1) */
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{ TYPE_X86_CPU, "guest-phys-bits", "0" },
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+ { "sev-guest", "legacy-vm-type", "true" },
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};
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const size_t pc_rhel_9_5_compat_len = G_N_ELEMENTS(pc_rhel_9_5_compat);
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diff --git a/target/i386/sev.c b/target/i386/sev.c
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index f4ee317cb0..d30b68c11e 100644
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--- a/target/i386/sev.c
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+++ b/target/i386/sev.c
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@@ -1417,6 +1417,7 @@ sev_guest_instance_init(Object *obj)
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object_property_add_uint32_ptr(obj, "reduced-phys-bits",
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&sev->reduced_phys_bits,
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OBJ_PROP_FLAG_READWRITE);
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+ object_apply_compat_props(obj);
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}
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/* sev guest info */
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--
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2.39.3
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