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GET /api/patches/2231442/?format=api
{ "id": 2231442, "url": "http://patchwork.ozlabs.org/api/patches/2231442/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260430172204.1006673-41-pbonzini@redhat.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260430172204.1006673-41-pbonzini@redhat.com>", "list_archive_url": null, "date": "2026-04-30T17:21:46", "name": "[PULL,40/58] whpx: i386: unknown MSR configurability", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "298afcd3e1a66951f7f1cb57378984bb00061d00", "submitter": { "id": 2701, "url": "http://patchwork.ozlabs.org/api/people/2701/?format=api", "name": "Paolo Bonzini", "email": "pbonzini@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260430172204.1006673-41-pbonzini@redhat.com/mbox/", "series": [ { "id": 502347, "url": "http://patchwork.ozlabs.org/api/series/502347/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502347", "date": "2026-04-30T17:21:16", "name": "[PULL,01/58] pythondeps: bump to meson 1.11.1", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502347/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2231442/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2231442/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) 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zOnb+Kvv6EwA4wXUrnpQrvkMCZUPCECTWjJHADegRDNCSaMooB+7kqgsRYM4SHtDlCcTEFdAOhi\n jh3xa3OrXwLWKXzsBlpA5DuhE2JUbr5cuiTWrQfJJ/HkTWa9Ax8BNfyQtHb9HRbzobWXCu3Bi2I\n 8mR3iZyWR4rBB7LifropABh6JmeEE0cbqSpos=", "X-Received": [ "by 2002:a05:622a:1ccf:b0:50e:601a:217f with SMTP id\n d75a77b69052e-5102ad9b124mr54357981cf.25.1777569851892;\n Thu, 30 Apr 2026 10:24:11 -0700 (PDT)", "by 2002:a05:622a:1ccf:b0:50e:601a:217f with SMTP id\n d75a77b69052e-5102ad9b124mr54357191cf.25.1777569851308;\n Thu, 30 Apr 2026 10:24:11 -0700 (PDT)" ], "From": "Paolo Bonzini <pbonzini@redhat.com>", "To": "qemu-devel@nongnu.org", "Cc": "Mohamed Mediouni <mohamed@unpredictable.fr>", "Subject": "[PULL 40/58] whpx: i386: unknown MSR configurability", "Date": "Thu, 30 Apr 2026 19:21:46 +0200", "Message-ID": "<20260430172204.1006673-41-pbonzini@redhat.com>", "X-Mailer": "git-send-email 2.54.0", "In-Reply-To": "<20260430172204.1006673-1-pbonzini@redhat.com>", "References": "<20260430172204.1006673-1-pbonzini@redhat.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=170.10.133.124;\n envelope-from=pbonzini@redhat.com;\n helo=us-smtp-delivery-124.mimecast.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001,\n SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "From: Mohamed Mediouni <mohamed@unpredictable.fr>\n\nAdd an option to inject back a GPF for unknown MSRs.\n\nKeep it on by default for now as Linux expects accesses to some\nAMD-specific MSRs to always succeed when on an AMD host.\n\nSigned-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>\nLink: https://lore.kernel.org/r/20260422214225.2242-18-mohamed@unpredictable.fr\nSigned-off-by: Paolo Bonzini <pbonzini@redhat.com>\n---\n include/system/whpx-all.h | 1 +\n include/system/whpx-internal.h | 1 +\n accel/whpx/whpx-common.c | 3 +++\n target/arm/whpx/whpx-all.c | 4 +++\n target/i386/whpx/whpx-all.c | 45 ++++++++++++++++++++++++++++++++++\n 5 files changed, 54 insertions(+)", "diff": "diff --git a/include/system/whpx-all.h b/include/system/whpx-all.h\nindex 2cbea71b149..4022571ffff 100644\n--- a/include/system/whpx-all.h\n+++ b/include/system/whpx-all.h\n@@ -20,6 +20,7 @@ void whpx_translate_cpu_breakpoints(\n CPUState *cpu,\n int cpu_breakpoint_count);\n void whpx_arch_destroy_vcpu(CPUState *cpu);\n+void whpx_arch_accel_class_init(ObjectClass *oc);\n \n /* called by whpx-accel-ops */\n bool whpx_arch_supports_guest_debug(void);\ndiff --git a/include/system/whpx-internal.h b/include/system/whpx-internal.h\nindex cf782cf5f89..86639627b36 100644\n--- a/include/system/whpx-internal.h\n+++ b/include/system/whpx-internal.h\n@@ -47,6 +47,7 @@ struct whpx_state {\n bool hyperv_enlightenments_required;\n bool hyperv_enlightenments_enabled;\n \n+ bool ignore_unknown_msr;\n };\n \n extern struct whpx_state whpx_global;\ndiff --git a/accel/whpx/whpx-common.c b/accel/whpx/whpx-common.c\nindex 59be996aefc..497c03138ec 100644\n--- a/accel/whpx/whpx-common.c\n+++ b/accel/whpx/whpx-common.c\n@@ -538,6 +538,8 @@ static void whpx_accel_class_init(ObjectClass *oc, const void *data)\n NULL, NULL);\n object_class_property_set_description(oc, \"hyperv\",\n \"Configure Hyper-V enlightenments\");\n+\n+ whpx_arch_accel_class_init(oc);\n }\n \n static void whpx_accel_instance_init(Object *obj)\n@@ -552,6 +554,7 @@ static void whpx_accel_instance_init(Object *obj)\n whpx->hyperv_enlightenments_required = false;\n /* Value determined at whpx_accel_init */\n whpx->hyperv_enlightenments_enabled = false;\n+ whpx->ignore_unknown_msr = true;\n }\n \n static const TypeInfo whpx_accel_type = {\ndiff --git a/target/arm/whpx/whpx-all.c b/target/arm/whpx/whpx-all.c\nindex 4019a513aa7..94304a4230b 100644\n--- a/target/arm/whpx/whpx-all.c\n+++ b/target/arm/whpx/whpx-all.c\n@@ -823,6 +823,10 @@ void whpx_cpu_instance_init(CPUState *cs)\n {\n }\n \n+void whpx_arch_accel_class_init(ObjectClass *oc)\n+{\n+}\n+\n int whpx_accel_init(AccelState *as, MachineState *ms)\n {\n struct whpx_state *whpx;\ndiff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c\nindex 9fc44f8a67e..eecc7f48ed9 100644\n--- a/target/i386/whpx/whpx-all.c\n+++ b/target/i386/whpx/whpx-all.c\n@@ -2133,6 +2133,10 @@ int whpx_vcpu_run(CPUState *cpu)\n vcpu->exit_ctx.MsrAccess.AccessInfo.IsWrite);\n }\n \n+ if (!is_known_msr && !whpx->ignore_unknown_msr) {\n+ x86_emul_raise_exception(&X86_CPU(cpu)->env, EXCP0D_GPF, 0);\n+ }\n+\n hr = whp_dispatch.WHvSetVirtualProcessorRegisters(\n whpx->partition,\n cpu->cpu_index,\n@@ -2532,6 +2536,47 @@ void whpx_cpu_instance_init(CPUState *cs)\n * Partition support\n */\n \n+static void whpx_set_unknown_msr(Object *obj, Visitor *v,\n+ const char *name, void *opaque,\n+ Error **errp)\n+{\n+ struct whpx_state *whpx = &whpx_global;\n+ OnOffAuto mode;\n+\n+ if (!visit_type_OnOffAuto(v, name, &mode, errp)) {\n+ return;\n+ }\n+\n+ switch (mode) {\n+ case ON_OFF_AUTO_ON:\n+ whpx->ignore_unknown_msr = true;\n+ break;\n+\n+ case ON_OFF_AUTO_OFF:\n+ whpx->ignore_unknown_msr = false;\n+ break;\n+\n+ case ON_OFF_AUTO_AUTO:\n+ whpx->ignore_unknown_msr = true;\n+ break;\n+ default:\n+ /*\n+ * The value was checked in visit_type_OnOffAuto() above. If\n+ * we get here, then something is wrong in QEMU.\n+ */\n+ abort();\n+ }\n+}\n+\n+void whpx_arch_accel_class_init(ObjectClass *oc)\n+{\n+ object_class_property_add(oc, \"ignore-unknown-msr\", \"OnOffAuto\",\n+ NULL, whpx_set_unknown_msr,\n+ NULL, NULL);\n+ object_class_property_set_description(oc, \"ignore-unknown-msr\",\n+ \"Configure unknown MSR behavior\");\n+}\n+\n int whpx_accel_init(AccelState *as, MachineState *ms)\n {\n struct whpx_state *whpx;\n", "prefixes": [ "PULL", "40/58" ] }