From nobody Mon Feb 9 15:32:35 2026 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 E3BCD260565 for ; Tue, 10 Jun 2025 22:58:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749596303; cv=none; b=uasWn1bnibmH8mmbmz3qLWaKLtDWPU8VjRviFUUjP3ZWj6rQMAMC052KobOAS8lU7qTOOHLR3gtHRWmFOs2An8Mwfe9iZ8+yGA/YVXU59KY0DssT9prOEZgiEPY66vhdJGoBCjN+HqFvRWWtlxb2Tb4gEZCLxhdIpSUTUGL3KPs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749596303; c=relaxed/simple; bh=IB7MuUnuIgiPbLKi3Tq9cVagh02TXhUkYhDO6XH5nEY=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=HKC5uyp4FopJJ49g16f6BjqJPYs5x5SkbJaMPB4h2QBsN6T0sVokM+Vc7mlgXC7pNe1WfmCQsyhgMPCc4kka2uZ8Tjha7iI8H23HwgKdpf+tgJb6oaGpln/ELwPgROKGQCXi9LJsZexrA530MNKWuQtXPjX730PS7vGs2Q+wRA4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=C4Fqr/kR; arc=none smtp.client-ip=209.85.216.73 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--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="C4Fqr/kR" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-3138e65efe2so2290448a91.1 for ; Tue, 10 Jun 2025 15:58:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1749596301; x=1750201101; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=ruy+gu6RGSeT+f9/V4uicP7PXhGDQAcKPy/FYrm3WvE=; b=C4Fqr/kRJdqxMEecE2E0xEkGRqIwa7/i3f1wI9Ls/PqS5TLpkg6pYNYLBsh+YJETNz PgLKI6fb2rFk30KE5PorEv7000XAzg2ISa1TUYXopsZ7/dTSSpF8ZfJtxLsLWjjVOG9E qYiOwb2mIkRJtC3ay23JG9VQtnH7t3s1witPr8h+0Qml06vAGhCsD/WRz3GsEmxn/Vo9 a79taufW/k6H7XVSzFg3nkGzIec75SEnBaqxO2+9Ui5N70+lZAWfEsJgCwvqbDhQf3Ja nkiulmK49vd9Gp+DoXvvM4GzewTkPTdnWwnsvoyIW5KHofdEw0XOhUxx1TLqDXkVmjgr Q3ZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749596301; x=1750201101; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=ruy+gu6RGSeT+f9/V4uicP7PXhGDQAcKPy/FYrm3WvE=; b=JKcQvLNBdtFFDL9gnJyA5D28njaLVRw0Bb0aCg5XBUxc2LbVMyvwzoMfGSIJ70/SdY IuBHhNCFpjE13HZ1tVp3j13jPVFFQEXZEWZL4HBpXsAeLC4rrVSh3Lcs9p7/vnofhLzN Yi4V+DAXZ9OZZf0dXsICzbs0QnlKUeqKmhrSldWp22YccvnWLLb9Sgydvy3gekr6u6CQ JBJB8YzhFphVzDhSWP0p1F4VobnC2RC63+PvYVRQosNog/wa3Su97xavhY9xmmpWJW0v NgJidbEMzLxL83ZJ7HebPGksq1Hr1AtCZvDlV3ZUHAkU8xJrV3aPzkrG/7iXWSnl9Ljm v07A== X-Forwarded-Encrypted: i=1; AJvYcCWzpATuoyuE1KX2wHHHA5jyGXUttm9BdPec57ov1YZTN7IxVwOiXtjs4TF+2mIx5jBRbpGLuI6y8DY/OAQ=@vger.kernel.org X-Gm-Message-State: AOJu0YyERLsCItdjTww59A9Yi0P7gWaZKz7JvcF+6pvwYWOrNYpy2Nsj WLjH2ev5IBVfsieYe1qAxjFQbi/lFDmNo5xNrauqlqzJ3qkpOf0WBcmrLnPtZXxiyfYOc2i1M0q b4Im2Lg== X-Google-Smtp-Source: AGHT+IFbea8RU8Wa7FlWpADnbF097Ndh4OlVRSMm3Srv7lWxi5ffWqJcVZoxQ6p+4c7SYNx97eTifIhcUmA= X-Received: from pjz3.prod.google.com ([2002:a17:90b:56c3:b0:312:e914:4548]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:50:b0:311:c1ec:7d03 with SMTP id 98e67ed59e1d1-313b2011f52mr491202a91.32.1749596301442; Tue, 10 Jun 2025 15:58:21 -0700 (PDT) Reply-To: Sean Christopherson Date: Tue, 10 Jun 2025 15:57:29 -0700 In-Reply-To: <20250610225737.156318-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250610225737.156318-1-seanjc@google.com> X-Mailer: git-send-email 2.50.0.rc0.642.g800a2b2222-goog Message-ID: <20250610225737.156318-25-seanjc@google.com> Subject: [PATCH v2 24/32] KVM: SVM: Drop explicit check on MSRPM offset when emulating SEV-ES accesses From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Chao Gao , Borislav Petkov , Xin Li , Dapeng Mi , Francesco Lavra , Manali Shukla Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Now that msr_write_intercepted() defaults to true, i.e. accurately reflects hardware behavior for out-of-range MSRs, and doesn't WARN (or BUG) on an out-of-range MSR, drop sev_es_prevent_msr_access()'s svm_msrpm_offset() check that guarded against calling msr_write_intercepted() with a "bad" index. Opportunistically clean up the helper's formatting. Signed-off-by: Sean Christopherson --- arch/x86/kvm/svm/svm.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 59088f68c557..9e4d08dba5f8 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -2767,12 +2767,11 @@ static int svm_get_feature_msr(u32 msr, u64 *data) return 0; } =20 -static bool -sev_es_prevent_msr_access(struct kvm_vcpu *vcpu, struct msr_data *msr_info) +static bool sev_es_prevent_msr_access(struct kvm_vcpu *vcpu, + struct msr_data *msr_info) { return sev_es_guest(vcpu->kvm) && vcpu->arch.guest_state_protected && - svm_msrpm_offset(msr_info->index) !=3D MSR_INVALID && !msr_write_intercepted(vcpu, msr_info->index); } =20 --=20 2.50.0.rc0.642.g800a2b2222-goog