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GET /api/1.1/patches/2237943/?format=api
{ "id": 2237943, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2237943/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260513163356.3033159-14-shaju.abraham@nutanix.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/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": "" }, "msgid": "<20260513163356.3033159-14-shaju.abraham@nutanix.com>", "date": "2026-05-13T16:33:56", "name": "[RFC,v1,13/13] target/arm/kvm: enable writable implementation ID registers", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "4bd56c17dcd53038858104a099472219c11eab33", "submitter": { "id": 77003, "url": "http://patchwork.ozlabs.org/api/1.1/people/77003/?format=api", "name": "Shaju Abraham", "email": "shaju.abraham@nutanix.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260513163356.3033159-14-shaju.abraham@nutanix.com/mbox/", "series": [ { "id": 504187, "url": "http://patchwork.ozlabs.org/api/1.1/series/504187/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=504187", "date": "2026-05-13T16:33:48", "name": "named CPU models for ARM64 on KVM", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/504187/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2237943/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2237943/checks/", "tags": {}, "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 (2048-bit key;\n unprotected) header.d=nutanix.com header.i=@nutanix.com header.a=rsa-sha256\n header.s=proofpoint20171006 header.b=ucDCNkAE;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=nutanix.com header.i=@nutanix.com header.a=rsa-sha256\n header.s=selector1 header.b=mQNBZfQr;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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helo=mx0b-002c1b01.pphosted.com", "X-Spam_score_int": "-31", "X-Spam_score": "-3.2", "X-Spam_bar": "---", "X-Spam_report": "(-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.445,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001,\n 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: Khushit Shah <khushit.shah@nutanix.com>\n\nEnable KVM_CAP_ARM_WRITABLE_IMP_ID_REGS if the host kernel supports it.\nThis allows QEMU to write implementation-defined ID registers (MIDR,\nREVIDR) so that named CPU models can present the correct values to the\nguest instead of inheriting the host's identity.\n\nSigned-off-by: Khushit Shah <khushit.shah@nutanix.com>\n---\n target/arm/kvm.c | 7 +++++++\n 1 file changed, 7 insertions(+)", "diff": "diff --git a/target/arm/kvm.c b/target/arm/kvm.c\nindex dc64cfbeb6..288b5ebe85 100644\n--- a/target/arm/kvm.c\n+++ b/target/arm/kvm.c\n@@ -711,6 +711,13 @@ int kvm_arch_init(MachineState *ms, KVMState *s)\n }\n }\n \n+ if (kvm_check_extension(s, KVM_CAP_ARM_WRITABLE_IMP_ID_REGS)) {\n+ if (kvm_vm_enable_cap(s, KVM_CAP_ARM_WRITABLE_IMP_ID_REGS, 0)) {\n+ error_report(\"Failed to enable \"\n+ \"KVM_CAP_ARM_WRITABLE_IMP_ID_REGS cap\");\n+ }\n+ }\n+\n if (s->kvm_eager_split_size) {\n uint32_t sizes;\n \n", "prefixes": [ "RFC", "v1", "13/13" ] }