{"id":2232163,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2232163/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260503073541.790215-15-eric.auger@redhat.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.2/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":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260503073541.790215-15-eric.auger@redhat.com>","list_archive_url":null,"date":"2026-05-03T07:33:34","name":"[v4,14/17] target/arm/kvm: Special case ID_AA64ISAR0_EL1 RES0 [24, 27] bits","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"1858887ebaca3066fb4cf11451a82410b3d89006","submitter":{"id":69187,"url":"http://patchwork.ozlabs.org/api/1.2/people/69187/?format=json","name":"Eric Auger","email":"eric.auger@redhat.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260503073541.790215-15-eric.auger@redhat.com/mbox/","series":[{"id":502569,"url":"http://patchwork.ozlabs.org/api/1.2/series/502569/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502569","date":"2026-05-03T07:33:20","name":"kvm/arm: Introduce a customizable aarch64 KVM host model","version":4,"mbox":"http://patchwork.ozlabs.org/series/502569/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2232163/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2232163/checks/","tags":{},"related":[],"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 (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=hHiDSFjL;\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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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1777793839;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=wMHufetHYJa4Ixy40r/OFgQsMVkW7F89Hja91OVyjGc=;\n b=hHiDSFjLSp9KUQVOhH1Urf8hb6QYNCkEwetvydT+5FcIa21NcWIHnc+38WgXxStIFwC+xM\n 6fK5q4nsKGd6CNSjr6ELXdTiVOeUw9fkseuV8eQJ57nlMn8pmjwvcmoRHp0+57/BZIjE6F\n U+tpOL379v+P5xnEtwVWVPiyENXp3ak=","X-MC-Unique":"5lerwPEpOJC3Mmgt6Vcbuw-1","X-Mimecast-MFC-AGG-ID":"5lerwPEpOJC3Mmgt6Vcbuw_1777793832","From":"Eric Auger ","To":"eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org,\n qemu-arm@nongnu.org, kvmarm@lists.linux.dev, peter.maydell@linaro.org,\n richard.henderson@linaro.org, cohuck@redhat.com, sebott@redhat.com,\n skolothumtho@nvidia.com, philmd@linaro.org","Cc":"maz@kernel.org, oliver.upton@linux.dev, pbonzini@redhat.com,\n armbru@redhat.com, berrange@redhat.com, abologna@redhat.com,\n jdenemar@redhat.com","Subject":"[PATCH v4 14/17] target/arm/kvm: Special case ID_AA64ISAR0_EL1 RES0\n [24, 27] bits","Date":"Sun, 3 May 2026 09:33:34 +0200","Message-ID":"<20260503073541.790215-15-eric.auger@redhat.com>","In-Reply-To":"<20260503073541.790215-1-eric.auger@redhat.com>","References":"<20260503073541.790215-1-eric.auger@redhat.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-Scanned-By":"MIMEDefang 3.4.1 on 10.30.177.93","Received-SPF":"pass client-ip=170.10.129.124;\n envelope-from=eric.auger@redhat.com; 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_H4=0.001, RCVD_IN_MSPIKE_WL=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":"RES0 [24, 27] bits seem to be reported as writable by the kernel.\nThis corresponds to former TME field that was turned to RES0 after\nFEAT_TME removal from the architecture.\n\nSee kernel commit d65bf6e317e7b (\"KVM: arm64: Remove all traces\nof FEAT_TME\") for additional info. However the kernel still exposes\nit at writable. Until this gets fixed, Let's ignore those bits.\n\nSigned-off-by: Eric Auger \n---\n target/arm/kvm.c | 11 +++++++----\n 1 file changed, 7 insertions(+), 4 deletions(-)","diff":"diff --git a/target/arm/kvm.c b/target/arm/kvm.c\nindex f3aecef35c..18373b0936 100644\n--- a/target/arm/kvm.c\n+++ b/target/arm/kvm.c\n@@ -430,10 +430,13 @@ decode_idreg_writemap(Object *obj, int index, uint64_t map, ARM64SysReg *reg)\n char *prop_name;\n \n if (!field) {\n- warn_report(\"%s bit %d of %s is writable but no named field \"\n- \"in target/arm/cpu-sysreg-properties.c\",\n- __func__, i, reg->name);\n- warn_report(\"%s is target/arm/cpu-sysreg-properties.c up to date?\", __func__);\n+ if (strcmp(reg->name, \"ID_AA64ISAR0_EL1\") || i < 24 || i > 27) {\n+ warn_report(\"%s bit %d of %s is writable but no named field \"\n+ \"in target/arm/cpu-sysreg-properties.c\",\n+ __func__, i, reg->name);\n+ warn_report(\"%s is target/arm/cpu-sysreg-properties.c up to date?\",\n+ __func__);\n+ }\n map = map & ~BIT_ULL(i);\n i = ctz64(map);\n continue;\n","prefixes":["v4","14/17"]}