From nobody Sun Oct 5 07:21:20 2025 Received: from mail-pg1-f201.google.com (mail-pg1-f201.google.com [209.85.215.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A97C42417C3 for ; Thu, 7 Aug 2025 20:16:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754597804; cv=none; b=kBswYOLweX1rVkw6mm6Ri8xpOiwrjTo0qmvFh+i+j1l0onmBJdVgZEo+7/o6HR5XXHUUnUdW9ppqAG9JxEic+LWf/7x+Dw6BQHO14boUabsB25GK2bNqlTeoWLFLSKAfxzRR9nFEia+szrL770azhMIaC47T+RUoUZlDAq48L08= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754597804; c=relaxed/simple; bh=KOoCqu20ck1nvt78qXS9AASI1nzd75am6SWO6mncJgo=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=gSOGXyeVYKZtHJj4tzyFRqctMXSwjNiPiDhHAGZOkqTrhV1WaZayuZZxASIRJhPNETmnHNhCBzda2kp7i/0UucPSecV81/45AsVlkxQIximWMMEDCtkBOdeO4aWS+VPDxHihyEoegO1W41NPryGvnmON0R3TiFIgBH9XkET+9xs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--sagis.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=hMmx0oYs; arc=none smtp.client-ip=209.85.215.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--sagis.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="hMmx0oYs" Received: by mail-pg1-f201.google.com with SMTP id 41be03b00d2f7-b2c37558eccso1200308a12.1 for ; Thu, 07 Aug 2025 13:16:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1754597802; x=1755202602; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=SY1063A3eM4jRKn9Lwg/S7WLjF7eZucmIixEhnmKPCk=; b=hMmx0oYsdjn7KlMNcJTZeUkYVJbkfVI5BM4olXFkYdlYoCIyV/n6Wa11ABEHQlKlfO p+cntW22meeHlU9gZriYiRXwVWG3F8J6XFYriehk7rHoe4X8kafK0ATuXWwMbChgczt2 1iCoEjOwiW6qSAxZwb/3xy4Fok3b2HsyjKMNu9c0kvK3pgf3b+9nGNTmJddJZ6+50GGJ uiWn6WWZQINbRSW+VaqU/UI3XYbk3ngh/M5bVSC6VJPEvDhu/q+0ZsYeBPrsRQ9Qtsek pHbQMikiEfZodnP5Q49oOQcZeS282ZyDL5b5JFSRHVa/mts5Jrx24MH11E8n08nzJCvR 2m0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754597802; x=1755202602; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=SY1063A3eM4jRKn9Lwg/S7WLjF7eZucmIixEhnmKPCk=; b=pnJI8uJRjpjrGuu+s1LRfyAhjgpGx/A4rkv+MQM+sQXhO7ge1k1Ac/mJ+xJZStstGQ 4fofHsGn4+IkI2swmt441Qs3M3dtzVHG0kRXfWQRQ0Fec60/WIugqlE2TG9mv2PRhNvh Zd4FQE6s7f0GSTZvnOCOuC00GuJcdfoaa1XnnMR86qDgpPnTsdSb/6Pm8DapPClscFyN HR1VOn9CHUpotg0FwbtlGEgEyjPp8LR42mfNKgbflyf3p/ad2snNonKCcQyf6kEV5GNm /DcibiCPt+LuPwfmVsx7KwZMmh4RFq7PThFqt9XFU6I9ikh9FR1NIy1Asen3APCPuIoP QCdg== X-Gm-Message-State: AOJu0YxmD6ij+yZHaT2rfFi6J8tjtOpxFa2EA3Nm8EVeMISsdC1FfQHl C4wpRv08iZszEYg0K85mrfP8MPHNhEwrpqgckTl/TjOj91ZRh62N980KfIUuISdUETcWaEtOpLk 6yA== X-Google-Smtp-Source: AGHT+IHr+KQP67F9tu5jX/oDeI0DglRUP8n3J9QXbxBj/BZFmCvo1Gke3fbBZ35nerS00VBumho8cM4uag== X-Received: from pldy12.prod.google.com ([2002:a17:902:cacc:b0:240:2d28:e064]) (user=sagis job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:1b26:b0:240:41a3:8e0d with SMTP id d9443c01a7336-242c221775bmr4503185ad.36.1754597801923; Thu, 07 Aug 2025 13:16:41 -0700 (PDT) Date: Thu, 7 Aug 2025 13:15:59 -0700 In-Reply-To: <20250807201628.1185915-1-sagis@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250807201628.1185915-1-sagis@google.com> X-Mailer: git-send-email 2.51.0.rc0.155.g4a0f42376b-goog Message-ID: <20250807201628.1185915-4-sagis@google.com> Subject: [PATCH v8 03/30] KVM: selftests: Store initial stack address in struct kvm_vcpu From: Sagi Shahar To: linux-kselftest@vger.kernel.org, Paolo Bonzini , Shuah Khan , Sean Christopherson , Ackerley Tng , Ryan Afranji , Andrew Jones , Isaku Yamahata , Erdem Aktas , Rick Edgecombe , Sagi Shahar , Roger Wang , Binbin Wu , Oliver Upton , "Pratik R. Sampat" , Reinette Chatre , Ira Weiny Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Ackerley Tng TDX guests' registers cannot be initialized directly using vcpu_regs_set(), hence the stack pointer needs to be initialized by the guest itself, running boot code beginning at the reset vector. Store the stack address as part of struct kvm_vcpu so that it can be accessible later to be passed to the boot code for rsp initialization. Signed-off-by: Ackerley Tng Signed-off-by: Sagi Shahar --- tools/testing/selftests/kvm/include/kvm_util.h | 1 + tools/testing/selftests/kvm/lib/x86/processor.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing= /selftests/kvm/include/kvm_util.h index 9994861d2acb..5c4ca25803ac 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -58,6 +58,7 @@ struct kvm_vcpu { int fd; struct kvm_vm *vm; struct kvm_run *run; + vm_vaddr_t initial_stack_addr; #ifdef __x86_64__ struct kvm_cpuid2 *cpuid; #endif diff --git a/tools/testing/selftests/kvm/lib/x86/processor.c b/tools/testin= g/selftests/kvm/lib/x86/processor.c index 002303e2a572..da6e9315ebe2 100644 --- a/tools/testing/selftests/kvm/lib/x86/processor.c +++ b/tools/testing/selftests/kvm/lib/x86/processor.c @@ -694,6 +694,8 @@ struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, ui= nt32_t vcpu_id) vcpu_init_sregs(vm, vcpu); vcpu_init_xcrs(vm, vcpu); =20 + vcpu->initial_stack_addr =3D stack_vaddr; + /* Setup guest general purpose registers */ vcpu_regs_get(vcpu, ®s); regs.rflags =3D regs.rflags | 0x2; --=20 2.51.0.rc0.155.g4a0f42376b-goog