{"id":2223161,"url":"http://patchwork.ozlabs.org/api/patches/2223161/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260414155433.483186-8-magnuskulke@linux.microsoft.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/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":"<20260414155433.483186-8-magnuskulke@linux.microsoft.com>","list_archive_url":null,"date":"2026-04-14T15:54:31","name":"[v4,7/9] target/i386/mshv: populate xsave area offsets","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"d9d978be8af82a0e800e90e715f9c8621a9f74a3","submitter":{"id":90753,"url":"http://patchwork.ozlabs.org/api/people/90753/?format=json","name":"Magnus Kulke","email":"magnuskulke@linux.microsoft.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260414155433.483186-8-magnuskulke@linux.microsoft.com/mbox/","series":[{"id":499862,"url":"http://patchwork.ozlabs.org/api/series/499862/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=499862","date":"2026-04-14T15:54:24","name":"Support QEMU cpu models in MSHV accelerator","version":4,"mbox":"http://patchwork.ozlabs.org/series/499862/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2223161/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2223161/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=linux.microsoft.com header.i=@linux.microsoft.com\n header.a=rsa-sha256 header.s=default header.b=D9M9P6FS;\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=linux.microsoft.com;\n s=default; t=1776182095;\n bh=aTVxvEVz5lQHNdZmbaeb9TChVHr9SVG0hmQSZJZieN0=;\n h=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n b=D9M9P6FSlPctwxe0ywTao8qSgWVPCpoqu4/L6f6TxANNbL84yoSoyzFYnYM+D8ck9\n fqhsi8Bw0vGt3cjnaH9iefLzREBcs4aCXMOJzbDjfpOtvzCt1SUlg1QQO6/+4KBU83\n znuS2kFHvdRBFdfpjGOtNSqFth50EvC+TzJFF89c=","From":"Magnus Kulke ","To":"qemu-devel@nongnu.org","Cc":"Wei Liu , Wei Liu ,\n Magnus Kulke ,\n Magnus Kulke , Zhao Liu ,\n Paolo Bonzini ","Subject":"[PATCH v4 7/9] target/i386/mshv: populate xsave area offsets","Date":"Tue, 14 Apr 2026 17:54:31 +0200","Message-Id":"<20260414155433.483186-8-magnuskulke@linux.microsoft.com>","X-Mailer":"git-send-email 2.34.1","In-Reply-To":"<20260414155433.483186-1-magnuskulke@linux.microsoft.com>","References":"<20260414155433.483186-1-magnuskulke@linux.microsoft.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Received-SPF":"pass client-ip=13.77.154.182;\n envelope-from=magnuskulke@linux.microsoft.com; helo=linux.microsoft.com","X-Spam_score_int":"-42","X-Spam_score":"-4.3","X-Spam_bar":"----","X-Spam_report":"(-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=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 ","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":"This function is copied verbatim from kvm_cpu_xsave_init(), for MSHV we\nneed to populate the offsets similarly.\n\nSigned-off-by: Magnus Kulke \nReviewed-by: Anirudh Rayabharam (Microsoft) \n---\n target/i386/mshv/mshv-cpu.c | 31 +++++++++++++++++++++++++++++++\n 1 file changed, 31 insertions(+)","diff":"diff --git a/target/i386/mshv/mshv-cpu.c b/target/i386/mshv/mshv-cpu.c\nindex 3b392533b4..ee25eb5f6f 100644\n--- a/target/i386/mshv/mshv-cpu.c\n+++ b/target/i386/mshv/mshv-cpu.c\n@@ -1706,11 +1706,42 @@ int mshv_arch_post_init_vm(int vm_fd)\n return ret;\n }\n \n+static void mshv_cpu_xsave_init(void)\n+{\n+ static bool first = true;\n+ uint32_t eax, ebx, ecx, edx;\n+ int i;\n+\n+ if (!first) {\n+ return;\n+ }\n+ first = false;\n+\n+ /* x87 and SSE states are in the legacy region of the XSAVE area. */\n+ x86_ext_save_areas[XSTATE_FP_BIT].offset = 0;\n+ x86_ext_save_areas[XSTATE_SSE_BIT].offset = 0;\n+\n+ for (i = XSTATE_SSE_BIT + 1; i < XSAVE_STATE_AREA_COUNT; i++) {\n+ ExtSaveArea *esa = &x86_ext_save_areas[i];\n+\n+ if (!esa->size) {\n+ continue;\n+ }\n+ host_cpuid(0xd, i, &eax, &ebx, &ecx, &edx);\n+ if (eax != 0) {\n+ assert(esa->size == eax);\n+ esa->offset = ebx;\n+ esa->ecx = ecx;\n+ }\n+ }\n+}\n+\n static void mshv_cpu_instance_init(CPUState *cs)\n {\n X86CPU *cpu = X86_CPU(cs);\n \n host_cpu_instance_init(cpu);\n+ mshv_cpu_xsave_init();\n }\n \n static void mshv_cpu_accel_class_init(ObjectClass *oc, const void *data)\n","prefixes":["v4","7/9"]}