From nobody Mon Feb 9 00:27:34 2026 Received: from mail-pl1-f202.google.com (mail-pl1-f202.google.com [209.85.214.202]) (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 521711F4635 for ; Mon, 14 Apr 2025 21:48:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744667324; cv=none; b=jbZNmmM+0GodWCBPi0KCjiolDtiKiAvIIvGUZNLBOWG+QTWwF+JMdz/nvH/EPAbmo2bSIb1hNcVcQqliA0NyggDuBCfpOYfFelKzNEz9+k0grFMeYBpU6yMyXmJkGimi+FpP0MSBlPwzx5aTk8L5EUqBZMQYGzBNbGxU9hVma3U= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744667324; c=relaxed/simple; bh=cVF8i8fC6zYL8vuKBGWbKSE3j92w2QFKcQp75ZnO3tI=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=rOZYzTVMMD974psG9MhiShiJ6Pyb3P/Ta/8hbcc55oTAjNbQIIKfjakec6i7TSwJdGT/NMsj/kOz32Yo8XhusfFUdKakqiYK/KOMTa4i3MMa3xkZBavNZ+LGQI4toNFsKRcPzKaAvsVScpS0XGHQ6fIulu7KI85psJQuYj6QV88= 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=vD52GClC; arc=none smtp.client-ip=209.85.214.202 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="vD52GClC" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-224191d9228so58535255ad.3 for ; Mon, 14 Apr 2025 14:48:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1744667321; x=1745272121; 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=K1RQ45cM2PIEyt0JnTJP0GeQFp54luaCwc0+oSbEGGM=; b=vD52GClCB6y3Mn+mc6wBSpxR0xlx0PWjpFW/4jqUd0SsF+YGZ22bMk5Ue+npmsot3V uQsg/NtSldigkDE/IGF0RjiWJzoCi3XJCFrZqSlGTO/ncBUnmU9vo/Omi2S2E6UpQTfA d7SXIAbsqyf10D3KubGd+Jj2fP98O2YXzwhEqNkHI7GuJSt4qrSwIRLbREqDdTtX1byC fAIBGNI/fap/3PFNPBqYk3K1jD2rAvqya3+W2Baafc5LQVnl76fgM9Kbf4z8coKrp5g/ PpxHiysqFWQcpbJkVwKStx6RiwLCcRw+Cb7drsqMiY89D3muEkynLND+0gz+1+2Fyp/v OlUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744667321; x=1745272121; 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=K1RQ45cM2PIEyt0JnTJP0GeQFp54luaCwc0+oSbEGGM=; b=XUjX8JkxMUvNhPH1GXdleM+fG7Sxt4jLxSGGcmo26QRta1ewWeNQ3ZK4qFKLskzWVZ 78TWj9aUNGjauPFzS/PSV0ibnAL3sycSF8rUFKkUgIKo/7pYPzbmzzwpI0l4PAiLo+hy amJrFID/sKCSWOIt2yn5K72nOsnx/8IQkhpH63gecxSc8IISjg+3XDczx27WHQusLha9 gKJu6nmeL60hoES75evwJFqtHq4Ij7YI3OHto4f2hYgq/kdesGHMW3DqObACWgEtviPC 61QjkWDlO52duOSX+XjIhMgOQsaniQc4s4j96XrBS97Z+D9cTLaD3sdUjMJek5kw3q2I Je1A== X-Gm-Message-State: AOJu0YyasXQS1ckHDNO5xHZ/E/xZ7xavsoj4G5OxNTjniXzU1ktct8ye 2UjMWKFztqR8v88WEkF7jVsjRRRL9IIj6rGvFSgq5Givr74C8Ge0m+zrsufguJ2w3Tadg6u0zw= = X-Google-Smtp-Source: AGHT+IEWrLXtYYvpm1ZZzfKrrXveTwDagXihw5BYYvY9UP3EGN5bNkpDzXeiDFWZErA7LBa+tlkfQYK35Q== X-Received: from plly18.prod.google.com ([2002:a17:902:7c92:b0:223:5c97:5c3c]) (user=sagis job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:b60f:b0:223:f408:c3f7 with SMTP id d9443c01a7336-22bea4abb9emr154541275ad.16.1744667321435; Mon, 14 Apr 2025 14:48:41 -0700 (PDT) Date: Mon, 14 Apr 2025 14:47:31 -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: <20250414214801.2693294-3-sagis@google.com> Subject: [PATCH v6 02/30] KVM: selftests: Expose function that sets up sregs based on VM's mode 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 This allows initializing sregs without setting vCPU registers in KVM. No functional change intended. Signed-off-by: Ackerley Tng Signed-off-by: Sagi Shahar --- .../selftests/kvm/include/x86/processor.h | 1 + .../testing/selftests/kvm/lib/x86/processor.c | 45 ++++++++++--------- 2 files changed, 25 insertions(+), 21 deletions(-) diff --git a/tools/testing/selftests/kvm/include/x86/processor.h b/tools/te= sting/selftests/kvm/include/x86/processor.h index b46f1e5120d1..3162c6e8ea23 100644 --- a/tools/testing/selftests/kvm/include/x86/processor.h +++ b/tools/testing/selftests/kvm/include/x86/processor.h @@ -1025,6 +1025,7 @@ static inline struct kvm_cpuid2 *allocate_kvm_cpuid2(= int nr_entries) } =20 void vcpu_init_cpuid(struct kvm_vcpu *vcpu, const struct kvm_cpuid2 *cpuid= ); +void vcpu_setup_mode_sregs(struct kvm_vm *vm, struct kvm_sregs *sregs); =20 static inline void vcpu_get_cpuid(struct kvm_vcpu *vcpu) { diff --git a/tools/testing/selftests/kvm/lib/x86/processor.c b/tools/testin= g/selftests/kvm/lib/x86/processor.c index 55971df6906c..1d6ae28aa398 100644 --- a/tools/testing/selftests/kvm/lib/x86/processor.c +++ b/tools/testing/selftests/kvm/lib/x86/processor.c @@ -488,34 +488,37 @@ static void kvm_seg_set_tss_64bit(vm_vaddr_t base, st= ruct kvm_segment *segp) segp->present =3D 1; } =20 -static void vcpu_init_sregs(struct kvm_vm *vm, struct kvm_vcpu *vcpu) +void vcpu_setup_mode_sregs(struct kvm_vm *vm, struct kvm_sregs *sregs) { - struct kvm_sregs sregs; - TEST_ASSERT_EQ(vm->mode, VM_MODE_PXXV48_4K); =20 - /* Set mode specific system register values. */ - vcpu_sregs_get(vcpu, &sregs); - - sregs.idt.base =3D vm->arch.idt; - sregs.idt.limit =3D NUM_INTERRUPTS * sizeof(struct idt_entry) - 1; - sregs.gdt.base =3D vm->arch.gdt; - sregs.gdt.limit =3D getpagesize() - 1; + sregs->idt.base =3D vm->arch.idt; + sregs->idt.limit =3D NUM_INTERRUPTS * sizeof(struct idt_entry) - 1; + sregs->gdt.base =3D vm->arch.gdt; + sregs->gdt.limit =3D getpagesize() - 1; =20 - sregs.cr0 =3D X86_CR0_PE | X86_CR0_NE | X86_CR0_PG; - sregs.cr4 |=3D X86_CR4_PAE | X86_CR4_OSFXSR; + sregs->cr0 =3D X86_CR0_PE | X86_CR0_NE | X86_CR0_PG; + sregs->cr4 |=3D X86_CR4_PAE | X86_CR4_OSFXSR; if (kvm_cpu_has(X86_FEATURE_XSAVE)) - sregs.cr4 |=3D X86_CR4_OSXSAVE; - sregs.efer |=3D (EFER_LME | EFER_LMA | EFER_NX); + sregs->cr4 |=3D X86_CR4_OSXSAVE; + sregs->efer |=3D (EFER_LME | EFER_LMA | EFER_NX); + + kvm_seg_set_unusable(&sregs->ldt); + kvm_seg_set_kernel_code_64bit(&sregs->cs); + kvm_seg_set_kernel_data_64bit(&sregs->ds); + kvm_seg_set_kernel_data_64bit(&sregs->es); + kvm_seg_set_kernel_data_64bit(&sregs->gs); + kvm_seg_set_tss_64bit(vm->arch.tss, &sregs->tr); =20 - kvm_seg_set_unusable(&sregs.ldt); - kvm_seg_set_kernel_code_64bit(&sregs.cs); - kvm_seg_set_kernel_data_64bit(&sregs.ds); - kvm_seg_set_kernel_data_64bit(&sregs.es); - kvm_seg_set_kernel_data_64bit(&sregs.gs); - kvm_seg_set_tss_64bit(vm->arch.tss, &sregs.tr); + sregs->cr3 =3D vm->pgd; +} + +static void vcpu_init_sregs(struct kvm_vm *vm, struct kvm_vcpu *vcpu) +{ + struct kvm_sregs sregs; =20 - sregs.cr3 =3D vm->pgd; + vcpu_sregs_get(vcpu, &sregs); + vcpu_setup_mode_sregs(vm, &sregs); vcpu_sregs_set(vcpu, &sregs); } =20 --=20 2.49.0.504.g3bcea36a83-goog