From nobody Sun Feb 8 01:16:30 2026 Received: from mail-pf1-f202.google.com (mail-pf1-f202.google.com [209.85.210.202]) (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 AA3C01F4CB6 for ; Mon, 14 Apr 2025 21:48:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744667325; cv=none; b=eL9L6H2+XfptYt9QeNmIZzkw31hiY04rMELEI6sGSeU4xJ3pjgNjX8+cwyGYIpkz5STwoOzAa9C02tSZkDIAlx4dohJI5AzCNgdZu5K4mEQtQKYFn/IKJmum9Gc1+fh03+WtQZoqAalsrm1jEBkc7j8mt2oIrIWbOFW/YSOwt+0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744667325; c=relaxed/simple; bh=v1vU9w9fOgcK6mGNYSWomneT3Jf2m20NWhjo4CsN6RM=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=S/VgV7rOkGJd7p/tJM9OpRX4sfUj70CKycHNSaZleuhOTXb2cFmlnDNQF3k/rq5jDno3tl8ZNqHFS8P/Gd6hjFqxBpkpYDYUjJsPZ/adPPox3uHVIe0vuOkdZBoOwGcLMz2PovvhHma3tRFx8SMD+BFzFvNXpXnr+OKBmbMIJVk= 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=I+n8qRFr; arc=none smtp.client-ip=209.85.210.202 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="I+n8qRFr" Received: by mail-pf1-f202.google.com with SMTP id d2e1a72fcca58-736c89461d1so6668534b3a.3 for ; Mon, 14 Apr 2025 14:48:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1744667323; x=1745272123; 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=U+s/qVOGbhuO+H0U9xUGKtlbnlzqsD0JwzNjS6nutT0=; b=I+n8qRFrCHi6VakdA5yhBhJxBGNM5jktot7DwwA0uDVm8pwP+bUK6lGtrgiztITxPf HVy/yYbG/qdnsMc+09uJ4QyUSwBfqqBJ3eE4mPeHr+qWCDhoFSjpXM3AVKwRoI8VZ+l7 fYuDLG5X3ys5uZYzd6WVVutuDRDP05Ra1pvUgM6GoTmRKq8iK0D74xDtojkAObnt8fto 4zxVaBr2uJaOTgxCCN/2qiboS62DfduDtdrWMc6fuYzcOb9x/wcQKub737pNluu7o8tP uKg/v5kaNdeGwvbk9SdkKhYkK6uztq7mAkE9EdhKPboM5E16TO66nIfA7zw90tQnCD6J KZWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744667323; x=1745272123; 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=U+s/qVOGbhuO+H0U9xUGKtlbnlzqsD0JwzNjS6nutT0=; b=W+kwRmTEBbl8KmgbtDrwn4gVOHBz0lC+GSlfbGgLvXQDaa8csX45oeMvTvrreti0XL 5yA0Nl4kOl3MBziQ77cWu2vUQHvF1LeSIZDEWzP0XBwLXT7UMEjHEh0G50xsqWYiNUej QGNT0MGt1nMWe8BZUoFZA2mrTGad6PCkrgHAhsDcCqEkb3pcBLSbQV9orPG3gwBohqVp TYhJ7XxnEBlfnfDQKZ2a/8884M/PUbugBH8aolAdLci28E/+X+HIw/CV4eO3eJzDq44X xGIzlhvLKmgQEMDBFkEvouwmJiGUU/+gKHRYP6ztUZf/oNE1AIri/0MPE5hES1h68oSJ 3KZg== X-Gm-Message-State: AOJu0YyVFuGx9KBRfd+CIIewEo1KW7Qp7mIjbC+CWaF61NhyMK4cC2D7 2T84EFlx6mge1ki2yUEqlcIdnfYzILne2dF0RAqwMWoITNz6dJ+X8RBGNxvLCN2mpdSicKULcw= = X-Google-Smtp-Source: AGHT+IFXjDd5QaCkjEQM0TvRDAQzKGrw46opDPglY5+CRyoXMxnqy73jYYR6rm5eLj+towNyrRWPQ/Gjxg== X-Received: from pfbgh6.prod.google.com ([2002:a05:6a00:6386:b0:730:76c4:7144]) (user=sagis job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:80b:b0:736:326a:bb3e with SMTP id d2e1a72fcca58-73bd12b37afmr15068525b3a.15.1744667322971; Mon, 14 Apr 2025 14:48:42 -0700 (PDT) Date: Mon, 14 Apr 2025 14:47:32 -0700 In-Reply-To: <20250414214801.2693294-1-sagis@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250414214801.2693294-1-sagis@google.com> X-Mailer: git-send-email 2.49.0.777.g153de2bbd5-goog Message-ID: <20250414214801.2693294-4-sagis@google.com> Subject: [PATCH v6 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 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 1bc0b44e78de..74ecfd8d7ae0 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 1d6ae28aa398..7c0fe3b138a1 100644 --- a/tools/testing/selftests/kvm/lib/x86/processor.c +++ b/tools/testing/selftests/kvm/lib/x86/processor.c @@ -695,6 +695,8 @@ 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 2.49.0.504.g3bcea36a83-goog