{"id":2196601,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2196601/?format=json","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.0/projects/14/?format=json","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":"<20260215112543.4817-10-mohamed@unpredictable.fr>","date":"2026-02-15T11:25:38","name":"[v10,09/14] hvf: arm: allow exposing minimal PMU when running with nested virt on","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"741a8f93a1750e19d23f58cf4d0f3d2e16ed3055","submitter":{"id":91318,"url":"http://patchwork.ozlabs.org/api/1.0/people/91318/?format=json","name":"Mohamed Mediouni","email":"mohamed@unpredictable.fr"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260215112543.4817-10-mohamed@unpredictable.fr/mbox/","series":[{"id":492211,"url":"http://patchwork.ozlabs.org/api/1.0/series/492211/?format=json","date":"2026-02-15T11:25:32","name":"HVF: Add support for platform vGIC and nested virtualisation","version":10,"mbox":"http://patchwork.ozlabs.org/series/492211/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2196601/checks/","tags":{},"headers":{"Return-Path":"","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=unpredictable.fr header.i=@unpredictable.fr\n header.a=rsa-sha256 header.s=sig1 header.b=PUhI02Xu;\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=outbound.mr.icloud.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, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n SPF_HELO_PASS=-0.001,\n SPF_PASS=-0.001 autolearn=unavailable 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 ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"When running with nested virt on, a minimum PMU is exposed by Hypervisor.framework\nif a valid PMUVer register value is set. That PMU isn't exposed otherwise.\n\nSigned-off-by: Mohamed Mediouni \n---\n target/arm/hvf/hvf.c | 4 ++++\n 1 file changed, 4 insertions(+)","diff":"diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c\nindex be1ff93e0e..0f45e22221 100644\n--- a/target/arm/hvf/hvf.c\n+++ b/target/arm/hvf/hvf.c\n@@ -879,6 +879,10 @@ static bool hvf_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)\n SET_IDREG(&host_isar, ID_AA64PFR1,\n GET_IDREG(&host_isar, ID_AA64PFR1) & ~R_ID_AA64PFR1_SME_MASK);\n \n+ if (hvf_nested_virt_enabled()) {\n+ FIELD_DP64_IDREG(&host_isar, ID_AA64DFR0, PMUVER, 0x1);\n+ }\n+\n ahcf->isar = host_isar;\n \n /*\n","prefixes":["v10","09/14"]}