From nobody Sat Feb 7 18:32:41 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3938C4167B for ; Tue, 12 Dec 2023 20:47:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377259AbjLLUrA (ORCPT ); Tue, 12 Dec 2023 15:47:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54812 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377235AbjLLUq5 (ORCPT ); Tue, 12 Dec 2023 15:46:57 -0500 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D84E8BD for ; Tue, 12 Dec 2023 12:47:03 -0800 (PST) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-5df9f98994bso22942177b3.0 for ; Tue, 12 Dec 2023 12:47:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1702414023; x=1703018823; 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=ir7Qh8CW4lvS6Nb/8/FOXimO+77Lwly2G5VfmqeIAwU=; b=mKnVKtaLzz92jCYRp6EPap2lEuR2Ltznu7AUYXOTqHFp9r+93Xb4LgOrqRZ2hs9cvE fu1w5OKc4nSSrms2nsLNDKTSccJD1EG0YS0Gz7hvMVpoyT9EqEK3pfplUcBqrey37+7I F6gpHgP1kJ6dcFyyJkGReiIGh7OM9BkQTtuNVRW9JbUiZgcFGsyluFwRzgDJ/zWL4ku0 x6unFUGGqXruJzLPPQHZUwa5gfgNAL4YFO6scmoPySYy9BIiqmrxx3A3XeookSYFiK4a yXhB7w2+8vdydEh7ocG7Tkk7Qpz2nBlp653rUwZYRNBJbKTxmZBObdRBKm8hVv+UJXaB hdYQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702414023; x=1703018823; 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=ir7Qh8CW4lvS6Nb/8/FOXimO+77Lwly2G5VfmqeIAwU=; b=tLN88VdINNiXn4DxqEvJsAYnbcZD+2NyW1DbaCvy0Zb7P749ac+GyvRdySZ5cSjJfB MvlmylJyynQmcEaA8Jd4qhcf5s6yHbeKa3t6fCDGXa97zYcALV6BJxncO+ev/RDOZl/g KGZ7i3zJkvRaLi1pDc3fO+NAG1OXTvGZyKF5vEziv6mbVWrSwXHjZxqip/tWgRVejWBx J/dRpeH1IoSW5uQkkkICgnffKrr8NrP+1BNTl9fSKWO14j9McJGT5sMpbHfoodvW+J4r Zpy6pcEueyN0iVInHUXaBHuMtUINaMPYUBAzztRpys0/+wDIPIbK9JCAB2gqdcNnu2bw LxWw== X-Gm-Message-State: AOJu0YzXTG4SN3sUNJjd/GEkx01Oaq02F/2yXE6NeuLrKmzKl2pMGy7b dzUr+3f8gk4zqG44QFUx6jGEHV2XHw== X-Google-Smtp-Source: AGHT+IFD5ajTV8O858cXODhPLGEEFN7xEKYfb0cjWPaPFQbSpbsFud7FYSS4rJTN/cV8ArjTn5X1GoxmxA== X-Received: from sagi.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:241b]) (user=sagis job=sendgmr) by 2002:a25:cb55:0:b0:dbc:b2d4:4793 with SMTP id b82-20020a25cb55000000b00dbcb2d44793mr34903ybg.6.1702414023009; Tue, 12 Dec 2023 12:47:03 -0800 (PST) Date: Tue, 12 Dec 2023 12:46:18 -0800 In-Reply-To: <20231212204647.2170650-1-sagis@google.com> Mime-Version: 1.0 References: <20231212204647.2170650-1-sagis@google.com> X-Mailer: git-send-email 2.43.0.472.g3155946c3a-goog Message-ID: <20231212204647.2170650-4-sagis@google.com> Subject: [RFC PATCH v5 03/29] KVM: selftests: Store initial stack address in struct kvm_vcpu From: Sagi Shahar To: linux-kselftest@vger.kernel.org, Ackerley Tng , Ryan Afranji , Erdem Aktas , Sagi Shahar , Isaku Yamahata Cc: Sean Christopherson , Paolo Bonzini , Shuah Khan , Peter Gonda , Haibo Xu , Chao Peng , Vishal Annapurve , Roger Wang , Vipin Sharma , jmattson@google.com, dmatlack@google.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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. We 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: Ryan Afranji Signed-off-by: Sagi Shahar Reviewed-by: Binbin Wu --- tools/testing/selftests/kvm/include/kvm_util_base.h | 1 + tools/testing/selftests/kvm/lib/x86_64/processor.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/te= sting/selftests/kvm/include/kvm_util_base.h index c2e5c5f25dfc..b353617fcdd1 100644 --- a/tools/testing/selftests/kvm/include/kvm_util_base.h +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h @@ -68,6 +68,7 @@ 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_64/processor.c b/tools/tes= ting/selftests/kvm/lib/x86_64/processor.c index f130f78a4974..b6b9438e0a33 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -621,10 +621,12 @@ struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, = uint32_t vcpu_id, vcpu_init_cpuid(vcpu, kvm_get_supported_cpuid()); vcpu_setup(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; - regs.rsp =3D stack_vaddr; + regs.rsp =3D vcpu->initial_stack_addr; regs.rip =3D (unsigned long) guest_code; vcpu_regs_set(vcpu, ®s); =20 --=20 2.43.0.472.g3155946c3a-goog