* Wed Aug 09 2023 Jon Maloy <jmaloy@redhat.com> - 6.2.0-38
- kvm-qapi-i386-sev-Change-the-reduced-phys-bits-value-fro.patch [bz#2214840] - kvm-qemu-options.hx-Update-the-reduced-phys-bits-documen.patch [bz#2214840] - kvm-i386-sev-Update-checks-and-information-related-to-re.patch [bz#2214840] - kvm-i386-cpu-Update-how-the-EBX-register-of-CPUID-0x8000.patch [bz#2214840] - kvm-target-i386-kvm-Fix-disabling-MPX-on-cpu-host-with-M.patch [bz#2223947] - Resolves: bz#2214840 ([AMDSERVER 8.9 Bug] Qemu SEV reduced-phys-bits fixes) - Resolves: bz#2223947 ([RHEL8.9] qemu core dump with '-cpu host,mpx=off' on Cascadelake host)
This commit is contained in:
Jon Maloy
parent
cffb6bb06a
commit
5b9676b8f4
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From 18ac13c7d64266238bd44b2188e0d044af3c3377 Mon Sep 17 00:00:00 2001
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From: Bandan Das <bsd@redhat.com>
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Date: Thu, 3 Aug 2023 15:14:14 -0400
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Subject: [PATCH 4/5] i386/cpu: Update how the EBX register of CPUID 0x8000001F
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is set
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RH-Author: Bandan Das <None>
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RH-MergeRequest: 296: Updates to SEV reduced-phys-bits parameter
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RH-Bugzilla: 2214840
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RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
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RH-Commit: [4/4] 8b236fd9bc4c177bfacf6220a429e711b5bf062e
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2214840
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commit fb6bbafc0f19385fb257ee073ed13dcaf613f2f8
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Author: Tom Lendacky <thomas.lendacky@amd.com>
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Date: Fri Sep 30 10:14:30 2022 -0500
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i386/cpu: Update how the EBX register of CPUID 0x8000001F is set
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Update the setting of CPUID 0x8000001F EBX to clearly document the ranges
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associated with fields being set.
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Fixes: 6cb8f2a663 ("cpu/i386: populate CPUID 0x8000_001F when SEV is active")
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Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
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Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Message-Id: <5822fd7d02b575121380e1f493a8f6d9eba2b11a.1664550870.git.thomas.lendacky@amd.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Bandan Das <bsd@redhat.com>
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---
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target/i386/cpu.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/target/i386/cpu.c b/target/i386/cpu.c
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index 9d3dcdcc0d..265f0aadfc 100644
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--- a/target/i386/cpu.c
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+++ b/target/i386/cpu.c
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@@ -5836,8 +5836,8 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
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if (sev_enabled()) {
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*eax = 0x2;
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*eax |= sev_es_enabled() ? 0x8 : 0;
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- *ebx = sev_get_cbit_position();
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- *ebx |= sev_get_reduced_phys_bits() << 6;
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+ *ebx = sev_get_cbit_position() & 0x3f; /* EBX[5:0] */
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+ *ebx |= (sev_get_reduced_phys_bits() & 0x3f) << 6; /* EBX[11:6] */
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}
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break;
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default:
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--
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2.37.3
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@ -0,0 +1,78 @@
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From 19504ea76b6341c11213316402bb5194487e1f01 Mon Sep 17 00:00:00 2001
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From: Bandan Das <bsd@redhat.com>
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Date: Thu, 3 Aug 2023 15:13:19 -0400
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Subject: [PATCH 3/5] i386/sev: Update checks and information related to
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reduced-phys-bits
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RH-Author: Bandan Das <None>
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RH-MergeRequest: 296: Updates to SEV reduced-phys-bits parameter
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RH-Bugzilla: 2214840
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RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
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RH-Commit: [3/4] b617173d2b15fa39cdc02b5c1ac4d52e9b0dfede
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2214840
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commit 8168fed9f84e3128f7628969ae78af49433d5ce7
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Author: Tom Lendacky <thomas.lendacky@amd.com>
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Date: Fri Sep 30 10:14:29 2022 -0500
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i386/sev: Update checks and information related to reduced-phys-bits
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The value of the reduced-phys-bits parameter is propogated to the CPUID
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information exposed to the guest. Update the current validation check to
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account for the size of the CPUID field (6-bits), ensuring the value is
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in the range of 1 to 63.
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Maintain backward compatibility, to an extent, by allowing a value greater
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than 1 (so that the previously documented value of 5 still works), but not
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allowing anything over 63.
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Fixes: d8575c6c02 ("sev/i386: add command to initialize the memory encryption context")
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Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
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Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Message-Id: <cca5341a95ac73f904e6300f10b04f9c62e4e8ff.1664550870.git.thomas.lendacky@amd.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Bandan Das <bsd@redhat.com>
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---
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target/i386/sev.c | 17 ++++++++++++++---
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1 file changed, 14 insertions(+), 3 deletions(-)
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diff --git a/target/i386/sev.c b/target/i386/sev.c
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index 025ff7a6f8..ba6a65e90c 100644
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--- a/target/i386/sev.c
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+++ b/target/i386/sev.c
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@@ -892,15 +892,26 @@ int sev_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
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host_cpuid(0x8000001F, 0, NULL, &ebx, NULL, NULL);
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host_cbitpos = ebx & 0x3f;
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+ /*
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+ * The cbitpos value will be placed in bit positions 5:0 of the EBX
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+ * register of CPUID 0x8000001F. No need to verify the range as the
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+ * comparison against the host value accomplishes that.
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+ */
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if (host_cbitpos != sev->cbitpos) {
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error_setg(errp, "%s: cbitpos check failed, host '%d' requested '%d'",
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__func__, host_cbitpos, sev->cbitpos);
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goto err;
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}
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- if (sev->reduced_phys_bits < 1) {
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- error_setg(errp, "%s: reduced_phys_bits check failed, it should be >=1,"
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- " requested '%d'", __func__, sev->reduced_phys_bits);
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+ /*
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+ * The reduced-phys-bits value will be placed in bit positions 11:6 of
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+ * the EBX register of CPUID 0x8000001F, so verify the supplied value
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+ * is in the range of 1 to 63.
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+ */
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+ if (sev->reduced_phys_bits < 1 || sev->reduced_phys_bits > 63) {
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+ error_setg(errp, "%s: reduced_phys_bits check failed,"
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+ " it should be in the range of 1 to 63, requested '%d'",
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+ __func__, sev->reduced_phys_bits);
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goto err;
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}
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--
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2.37.3
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@ -0,0 +1,55 @@
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From 57ee29fbb08f7b89ee1b7c75b749392c08af3b03 Mon Sep 17 00:00:00 2001
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From: Bandan Das <bsd@redhat.com>
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Date: Thu, 3 Aug 2023 15:23:54 -0400
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Subject: [PATCH 1/5] qapi, i386/sev: Change the reduced-phys-bits value from 5
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to 1
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RH-Author: Bandan Das <None>
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RH-MergeRequest: 296: Updates to SEV reduced-phys-bits parameter
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RH-Bugzilla: 2214840
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RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
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RH-Commit: [1/4] 4137cb3b57cbb175078bc908fb2301ea2b97fd17
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2214840
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commit 798a818f50a9bfc01e8b5943090de458863b897b
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Author: Tom Lendacky <thomas.lendacky@amd.com>
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Date: Fri Sep 30 10:14:27 2022 -0500
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qapi, i386/sev: Change the reduced-phys-bits value from 5 to 1
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A guest only ever experiences, at most, 1 bit of reduced physical
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addressing. Change the query-sev-capabilities json comment to use 1.
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Fixes: 31dd67f684 ("sev/i386: qmp: add query-sev-capabilities command")
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Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
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Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Message-Id: <cb96d8e09154533af4b4e6988469bc0b32390b65.1664550870.git.thomas.lendacky@amd.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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RHEL Notes:
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Conflicts: Context differences, since commit 811b4ec7f8eb<qapi, target/i386/sev: Add cpu0-id to query-sev-capabilities>
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is missing
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Signed-off-by: Bandan Das <bsd@redhat.com>
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---
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qapi/misc-target.json | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/qapi/misc-target.json b/qapi/misc-target.json
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index 4bc45d2474..ede9052440 100644
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--- a/qapi/misc-target.json
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+++ b/qapi/misc-target.json
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@@ -205,7 +205,7 @@
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#
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# -> { "execute": "query-sev-capabilities" }
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# <- { "return": { "pdh": "8CCDD8DDD", "cert-chain": "888CCCDDDEE",
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-# "cbitpos": 47, "reduced-phys-bits": 5}}
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+# "cbitpos": 47, "reduced-phys-bits": 1}}
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#
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##
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{ 'command': 'query-sev-capabilities', 'returns': 'SevCapability',
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--
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2.37.3
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@ -0,0 +1,61 @@
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|
From 095811c08557b0a2ad1a433d28699ead1e5ef664 Mon Sep 17 00:00:00 2001
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|
From: Bandan Das <bsd@redhat.com>
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|
Date: Thu, 3 Aug 2023 15:12:15 -0400
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|
Subject: [PATCH 2/5] qemu-options.hx: Update the reduced-phys-bits
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|
documentation
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|
|
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|
RH-Author: Bandan Das <None>
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|
RH-MergeRequest: 296: Updates to SEV reduced-phys-bits parameter
|
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|
RH-Bugzilla: 2214840
|
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|
RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
|
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|
RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
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|
RH-Commit: [2/4] f8e8f5aeff449a34ce90c6e55e2a51873a6e6a87
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|
|
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|
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2214840
|
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|
|
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|
commit 326e3015c4c6f3197157ea0bb00826ae740e2fad
|
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|
Author: Tom Lendacky <thomas.lendacky@amd.com>
|
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|
Date: Fri Sep 30 10:14:28 2022 -0500
|
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|
|
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|
qemu-options.hx: Update the reduced-phys-bits documentation
|
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|
|
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|
A guest only ever experiences, at most, 1 bit of reduced physical
|
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|
addressing. Update the documentation to reflect this as well as change
|
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|
the example value on the reduced-phys-bits option.
|
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|
|
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|
Fixes: a9b4942f48 ("target/i386: add Secure Encrypted Virtualization (SEV) object")
|
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|
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
|
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|
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
|
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|
Message-Id: <13a62ced1808546c1d398e2025cf85f4c94ae123.1664550870.git.thomas.lendacky@amd.com>
|
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|
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
|
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|
|
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|
Signed-off-by: Bandan Das <bsd@redhat.com>
|
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|
---
|
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|
qemu-options.hx | 4 ++--
|
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|
1 file changed, 2 insertions(+), 2 deletions(-)
|
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|
|
||||||
|
diff --git a/qemu-options.hx b/qemu-options.hx
|
||||||
|
index 4b7798088b..981248e283 100644
|
||||||
|
--- a/qemu-options.hx
|
||||||
|
+++ b/qemu-options.hx
|
||||||
|
@@ -5204,7 +5204,7 @@ SRST
|
||||||
|
physical address space. The ``reduced-phys-bits`` is used to
|
||||||
|
provide the number of bits we loose in physical address space.
|
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|
Similar to C-bit, the value is Host family dependent. On EPYC,
|
||||||
|
- the value should be 5.
|
||||||
|
+ a guest will lose a maximum of 1 bit, so the value should be 1.
|
||||||
|
|
||||||
|
The ``sev-device`` provides the device file to use for
|
||||||
|
communicating with the SEV firmware running inside AMD Secure
|
||||||
|
@@ -5239,7 +5239,7 @@ SRST
|
||||||
|
|
||||||
|
# |qemu_system_x86| \\
|
||||||
|
...... \\
|
||||||
|
- -object sev-guest,id=sev0,cbitpos=47,reduced-phys-bits=5 \\
|
||||||
|
+ -object sev-guest,id=sev0,cbitpos=47,reduced-phys-bits=1 \\
|
||||||
|
-machine ...,memory-encryption=sev0 \\
|
||||||
|
.....
|
||||||
|
|
||||||
|
--
|
||||||
|
2.37.3
|
||||||
|
|
||||||
@ -0,0 +1,57 @@
|
|||||||
|
From 522ce31b4998b714b03e781f49403b71531ebe5a Mon Sep 17 00:00:00 2001
|
||||||
|
From: "Maciej S. Szmigiero" <maciej.szmigiero@oracle.com>
|
||||||
|
Date: Mon, 23 May 2022 18:26:58 +0200
|
||||||
|
Subject: [PATCH 5/5] target/i386/kvm: Fix disabling MPX on "-cpu host" with
|
||||||
|
MPX-capable host
|
||||||
|
|
||||||
|
RH-Author: Ani Sinha <None>
|
||||||
|
RH-MergeRequest: 297: target/i386/kvm: Fix disabling MPX on "-cpu host" with MPX-capable host
|
||||||
|
RH-Bugzilla: 2223947
|
||||||
|
RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
|
||||||
|
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
|
||||||
|
RH-Commit: [1/1] 90098294a873a53b366389606fd0402efcbd70ad
|
||||||
|
|
||||||
|
Since KVM commit 5f76f6f5ff96 ("KVM: nVMX: Do not expose MPX VMX controls when guest MPX disabled")
|
||||||
|
it is not possible to disable MPX on a "-cpu host" just by adding "-mpx"
|
||||||
|
there if the host CPU does indeed support MPX.
|
||||||
|
QEMU will fail to set MSR_IA32_VMX_TRUE_{EXIT,ENTRY}_CTLS MSRs in this case
|
||||||
|
and so trigger an assertion failure.
|
||||||
|
|
||||||
|
Instead, besides "-mpx" one has to explicitly add also
|
||||||
|
"-vmx-exit-clear-bndcfgs" and "-vmx-entry-load-bndcfgs" to QEMU command
|
||||||
|
line to make it work, which is a bit convoluted.
|
||||||
|
|
||||||
|
Make the MPX-related bits in FEAT_VMX_{EXIT,ENTRY}_CTLS dependent on MPX
|
||||||
|
being actually enabled so such workarounds are no longer necessary.
|
||||||
|
|
||||||
|
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
|
||||||
|
Message-Id: <51aa2125c76363204cc23c27165e778097c33f0b.1653323077.git.maciej.szmigiero@oracle.com>
|
||||||
|
Cc: qemu-stable@nongnu.org
|
||||||
|
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
|
||||||
|
(cherry picked from commit 267b5e7e378afd260004cb37a66a6fcd641e3b53)
|
||||||
|
---
|
||||||
|
target/i386/cpu.c | 8 ++++++++
|
||||||
|
1 file changed, 8 insertions(+)
|
||||||
|
|
||||||
|
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
|
||||||
|
index 265f0aadfc..726814ee2e 100644
|
||||||
|
--- a/target/i386/cpu.c
|
||||||
|
+++ b/target/i386/cpu.c
|
||||||
|
@@ -1326,6 +1326,14 @@ static FeatureDep feature_dependencies[] = {
|
||||||
|
.from = { FEAT_7_0_EBX, CPUID_7_0_EBX_INVPCID },
|
||||||
|
.to = { FEAT_VMX_SECONDARY_CTLS, VMX_SECONDARY_EXEC_ENABLE_INVPCID },
|
||||||
|
},
|
||||||
|
+ {
|
||||||
|
+ .from = { FEAT_7_0_EBX, CPUID_7_0_EBX_MPX },
|
||||||
|
+ .to = { FEAT_VMX_EXIT_CTLS, VMX_VM_EXIT_CLEAR_BNDCFGS },
|
||||||
|
+ },
|
||||||
|
+ {
|
||||||
|
+ .from = { FEAT_7_0_EBX, CPUID_7_0_EBX_MPX },
|
||||||
|
+ .to = { FEAT_VMX_ENTRY_CTLS, VMX_VM_ENTRY_LOAD_BNDCFGS },
|
||||||
|
+ },
|
||||||
|
{
|
||||||
|
.from = { FEAT_7_0_EBX, CPUID_7_0_EBX_RDSEED },
|
||||||
|
.to = { FEAT_VMX_SECONDARY_CTLS, VMX_SECONDARY_EXEC_RDSEED_EXITING },
|
||||||
|
--
|
||||||
|
2.37.3
|
||||||
|
|
||||||
@ -83,7 +83,7 @@ Obsoletes: %1-rhev <= %{epoch}:%{version}-%{release}
|
|||||||
Summary: QEMU is a machine emulator and virtualizer
|
Summary: QEMU is a machine emulator and virtualizer
|
||||||
Name: qemu-kvm
|
Name: qemu-kvm
|
||||||
Version: 6.2.0
|
Version: 6.2.0
|
||||||
Release: 37%{?rcrel}%{?dist}
|
Release: 38%{?rcrel}%{?dist}
|
||||||
# Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
|
# Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
|
||||||
Epoch: 15
|
Epoch: 15
|
||||||
License: GPLv2 and GPLv2+ and CC-BY
|
License: GPLv2 and GPLv2+ and CC-BY
|
||||||
@ -769,6 +769,16 @@ Patch303: kvm-util-iov-Remove-qemu_iovec_init_extended.patch
|
|||||||
Patch304: kvm-iotests-iov-padding-New-test.patch
|
Patch304: kvm-iotests-iov-padding-New-test.patch
|
||||||
# For bz#2141964 - Guest hit EXT4-fs error on host 4K disk when repeatedly hot-plug/unplug running IO disk
|
# For bz#2141964 - Guest hit EXT4-fs error on host 4K disk when repeatedly hot-plug/unplug running IO disk
|
||||||
Patch305: kvm-block-Fix-pad_request-s-request-restriction.patch
|
Patch305: kvm-block-Fix-pad_request-s-request-restriction.patch
|
||||||
|
# For bz#2214840 - [AMDSERVER 8.9 Bug] Qemu SEV reduced-phys-bits fixes
|
||||||
|
Patch306: kvm-qapi-i386-sev-Change-the-reduced-phys-bits-value-fro.patch
|
||||||
|
# For bz#2214840 - [AMDSERVER 8.9 Bug] Qemu SEV reduced-phys-bits fixes
|
||||||
|
Patch307: kvm-qemu-options.hx-Update-the-reduced-phys-bits-documen.patch
|
||||||
|
# For bz#2214840 - [AMDSERVER 8.9 Bug] Qemu SEV reduced-phys-bits fixes
|
||||||
|
Patch308: kvm-i386-sev-Update-checks-and-information-related-to-re.patch
|
||||||
|
# For bz#2214840 - [AMDSERVER 8.9 Bug] Qemu SEV reduced-phys-bits fixes
|
||||||
|
Patch309: kvm-i386-cpu-Update-how-the-EBX-register-of-CPUID-0x8000.patch
|
||||||
|
# For bz#2223947 - [RHEL8.9] qemu core dump with '-cpu host,mpx=off' on Cascadelake host
|
||||||
|
Patch310: kvm-target-i386-kvm-Fix-disabling-MPX-on-cpu-host-with-M.patch
|
||||||
|
|
||||||
BuildRequires: wget
|
BuildRequires: wget
|
||||||
BuildRequires: rpm-build
|
BuildRequires: rpm-build
|
||||||
@ -1938,6 +1948,17 @@ sh %{_sysconfdir}/sysconfig/modules/kvm.modules &> /dev/null || :
|
|||||||
|
|
||||||
|
|
||||||
%changelog
|
%changelog
|
||||||
|
* Wed Aug 09 2023 Jon Maloy <jmaloy@redhat.com> - 6.2.0-38
|
||||||
|
- kvm-qapi-i386-sev-Change-the-reduced-phys-bits-value-fro.patch [bz#2214840]
|
||||||
|
- kvm-qemu-options.hx-Update-the-reduced-phys-bits-documen.patch [bz#2214840]
|
||||||
|
- kvm-i386-sev-Update-checks-and-information-related-to-re.patch [bz#2214840]
|
||||||
|
- kvm-i386-cpu-Update-how-the-EBX-register-of-CPUID-0x8000.patch [bz#2214840]
|
||||||
|
- kvm-target-i386-kvm-Fix-disabling-MPX-on-cpu-host-with-M.patch [bz#2223947]
|
||||||
|
- Resolves: bz#2214840
|
||||||
|
([AMDSERVER 8.9 Bug] Qemu SEV reduced-phys-bits fixes)
|
||||||
|
- Resolves: bz#2223947
|
||||||
|
([RHEL8.9] qemu core dump with '-cpu host,mpx=off' on Cascadelake host)
|
||||||
|
|
||||||
* Tue Jul 25 2023 Miroslav Rezanina <mrezanin@redhat.com> - 6.2.0-37
|
* Tue Jul 25 2023 Miroslav Rezanina <mrezanin@redhat.com> - 6.2.0-37
|
||||||
- kvm-util-iov-Make-qiov_slice-public.patch [bz#2141964]
|
- kvm-util-iov-Make-qiov_slice-public.patch [bz#2141964]
|
||||||
- kvm-block-Collapse-padded-I-O-vecs-exceeding-IOV_MAX.patch [bz#2141964]
|
- kvm-block-Collapse-padded-I-O-vecs-exceeding-IOV_MAX.patch [bz#2141964]
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user