From nobody Sun Sep 14 14:53:51 2025 Received: from mail-pl1-f201.google.com (mail-pl1-f201.google.com [209.85.214.201]) (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 C905B28726B for ; Thu, 4 Sep 2025 06:55:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756968931; cv=none; b=b1Q6AKmHeojxwTyruc2sZmYeDB2le9cS9pYGmvw37fKpZ3BSk6CYgmp7RqYirpfLqC2bJnZiYMtUChd72YQada6AOmSPpLMlhrczRhEcisSSWMmeHre4fRGmGy8+bBbFCw8GVIcYr89/G1nRwgbc8LXsFppmm/MhXv/MGNp7ZJk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756968931; c=relaxed/simple; bh=RW05ySQDdsIFpEjdK0DhL1N2wBFwDRbslCaLfnA5S1Q=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=ei2//OUTXLz9QJmDe3ssWjRN6xxXhzH0hWeH9fIklZhJv/zZlS8/cB64G1F0s+m9+9X9N1E7GF001Mqt6oT5wElVb8cbut/hKzJKTL18/C+YUYay2ZjxChkWhxnnpQ1L4Jq9cL4H+TU5L2M/P4Tg+nvJtoc/BsO0o9rxY7uerlk= 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=mf6c99XR; arc=none smtp.client-ip=209.85.214.201 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="mf6c99XR" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-2445806b18aso9214495ad.1 for ; Wed, 03 Sep 2025 23:55:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1756968929; x=1757573729; 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=Pwpwna9XgBpUtgEehRSSyfXaOgUGlQYKXpp1R7Oe4SU=; b=mf6c99XR5RZqlnBYe0Pnlp4jqoEnr3fvcgDw2/PEYyXawT4mXjjAQS8VgC6pR6/cBv WSNas3V7cDFIpuidq8i+MDXhk43ZH8kIpdHe4tATFXbr6WHbC0PS4X2VGyGw8qLaU4Ns sfSWJTw6IeLSM8iCtSze6z650++vVQQ1AHAGQV26qFLg847BtP6OvTJV5R1ehmZ5EE1E u6/VOt8tRZDWOFPn3lLfYc98Z/foXTFTyDTX6hlTdYGLoOtUXZ40DkV8rp940RRCgRgu 6PEPzxCL3KA8HCZPc09MfVXFjh/LBuo2M3hhOpoE/AUWxHYIkZDd2V4/pR0RZ0ub/T2x //4A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756968929; x=1757573729; 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=Pwpwna9XgBpUtgEehRSSyfXaOgUGlQYKXpp1R7Oe4SU=; b=pPNTMm06ZrqwscHe9EaymDfb91NeHBMoHCv6dVk3Uvqq7cjh4tOKAowTYY0Xj1KHQb Dn72kl13TkoAQC6MknuIGlFLjs/CrW6K574I9miyAyPefaCRdsgCKX1wBMlaCka3WkUa SGpdSbIVM1lBfR2l87GaYMm0/MldyCjN+qe+fC+tE1Clq33IHv9ThvkwKnXbujcYG9cJ CGPHVjL4FAc3mfvnNQ9siaLWGDdOHucPFcOfBQTAJuoiBHVLriyLYjXiCsT48gGcRUqs 8LvfgjgCQHRahGJF9w8AzchhcdJMjo4wZOnASI3XaQyIRwX5kvojVMpl0NvpNef4kPAw vHCA== X-Gm-Message-State: AOJu0YxUV3UUmiNkXwUBiqv2XYHRQ/LrcAGwXgftSIZLONW9cVXCRcFW HRqNfm72KVvmtqdr++jehYXj8vewuP6DEdydoWYH1If7QNSfUFr7B4b2D7v1+qNtysCOE2tZfd+ Iow== X-Google-Smtp-Source: AGHT+IGTvEeHEwVjQcaCZIJtCzHKu5Fk7QZqOq/RQ0i8WE5vhn5/ejm8chAGsKWMY9tCoRWfG5svPLcwPQ== X-Received: from pjbsx12.prod.google.com ([2002:a17:90b:2ccc:b0:30a:7da4:f075]) (user=sagis job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:db03:b0:249:c66:199e with SMTP id d9443c01a7336-24944a177fbmr236741125ad.26.1756968929203; Wed, 03 Sep 2025 23:55:29 -0700 (PDT) Date: Wed, 3 Sep 2025 23:54:47 -0700 In-Reply-To: <20250904065453.639610-1-sagis@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250904065453.639610-1-sagis@google.com> X-Mailer: git-send-email 2.51.0.338.gd7d06c2dae-goog Message-ID: <20250904065453.639610-18-sagis@google.com> Subject: [PATCH v10 17/21] KVM: selftests: Set entry point for TDX guest code 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 , Chao Gao , Chenyi Qiang Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Since the rip register is inaccessible for TDX VMs, we need a different way to set the guest entry point for TDX VMs. This is done by writing the guest code address to a predefined location in the guest memory and loading it into rip as part of the TDX boot code. Signed-off-by: Sagi Shahar --- tools/testing/selftests/kvm/lib/x86/processor.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/kvm/lib/x86/processor.c b/tools/testin= g/selftests/kvm/lib/x86/processor.c index b1e5f4137629..4a831b0f206e 100644 --- a/tools/testing/selftests/kvm/lib/x86/processor.c +++ b/tools/testing/selftests/kvm/lib/x86/processor.c @@ -654,9 +654,13 @@ void vcpu_arch_set_entry_point(struct kvm_vcpu *vcpu, = void *guest_code) { struct kvm_regs regs; =20 - vcpu_regs_get(vcpu, ®s); - regs.rip =3D (unsigned long) guest_code; - vcpu_regs_set(vcpu, ®s); + if (is_tdx_vm(vcpu->vm)) + vm_tdx_set_vcpu_entry_point(vcpu, guest_code); + else { + vcpu_regs_get(vcpu, ®s); + regs.rip =3D (unsigned long) guest_code; + vcpu_regs_set(vcpu, ®s); + } } =20 vm_vaddr_t kvm_allocate_vcpu_stack(struct kvm_vm *vm) --=20 2.51.0.338.gd7d06c2dae-goog