From patchwork Thu Nov 7 23:24:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dionna Amalie Glaze X-Patchwork-Id: 13867292 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (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 6E115219CB4 for ; Thu, 7 Nov 2024 23:28:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731022130; cv=none; b=iVg84RsIIb2UOWW1EXvjx6cXYf3mHsxfNP+FZgf3dC7v8SYoVMnuSSKrwyxPuo2mO+2qXOWwyUNQ1UCA0rQ4bc0XeATmkXjy9P0o1tlJWkVew6C1rws/w22l5ys2nTWkilSWrvrDwYnGU6UnVkNM15E/FVeP4hUK/P61XMRmxns= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731022130; c=relaxed/simple; bh=ayby78yQOyjOz6ls+yE5cxTfghhQvc3yyzZlL7gs+bU=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=Y/Xjc3Aa6EdvKlMckJ5SPWAIQMMHCV8Ke9CCeUjuZ5zttjB7W34vhSiNwIht/uZlva3ZteRfRukk9Me5fP+2fd7P0AwgsKtrhZwGybj9FbWhGOGZqIOjDIDOXAqeGU9owSZqTezK/K0s72Epj21DbtCNIkQFG1CF2OWD7lx8iW8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--dionnaglaze.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=auWftEj1; arc=none smtp.client-ip=209.85.128.202 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--dionnaglaze.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="auWftEj1" Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-6ea9618de40so27304377b3.3 for ; Thu, 07 Nov 2024 15:28:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1731022126; x=1731626926; darn=lists.linux.dev; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=WmL++hD8fgHMSusvyHDFwqq57StgWysj/njcEHmccMk=; b=auWftEj1lb9q0hKVNKq/RroH7B/8JCgW3EtBYQlAgR1gpQN80rJlsOnE1dZGARswMr MEhGI0OXbVTwYg4iiNuhVMnXeytC5QvzKWMLI9aqPiEGEU3Fgbgm94ID2clwvRx1c0hm vSGfezOFEFmu+8Q92Or1u82tg97qo47g66SC+ga1NLfPjQuMPdVNGDMnKu1s6cNV7bYf E0qTl4MFivC8EX8EoUpN1gJ8l5MNmmT6XPV/PthFsoYcSTkeb/xvs4F62NVXdLSG4ogV 16wTHiWxhhtetvuuaA6EQQxguTtJ/bWYmjgVUAIncV3EJze9zW0sD7aRneWqgwrTLM74 HzMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1731022126; x=1731626926; 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=WmL++hD8fgHMSusvyHDFwqq57StgWysj/njcEHmccMk=; b=CT24oeAM1nl6urwYJYbdKAOQu5qWc/7Bb3N4N2fyGSyDqxYejLnKpur9GsC6pMsKSO eJPlYEFqfrYBjkJsqwKyJ+qkt4DUPHod5JqMBZddlv2cnK+DoaUp6SxToCigNJKterKR pSwaBN1UyzGrLXQ7986r8mUU39d62SHudSleeKXTh5tmuFGB6y9G73tyuU8UAxMk0zyi NtDd9LtRTyqX3m9OZqpJKF7yNBocNoU+wD0z5pYr3pNqCq5hTc1lTUv8JERf/buv9x0N ASjl6C9REDhLWLuWSL9W1PzbnKWc+is0a1nTH1WHUR93vm7B8qzi3K5pJ8sanSF+6bOp gjpw== X-Gm-Message-State: AOJu0YysGAcPU73g4eJAte5/IaA6ApSuBAouWzJqsTc+dxFpLAXUqgFn F0HTB78nFVOHRkrVMforVOX6WKEIVFlGOv1zeRApV8O8GDg0TWhGRy5RhT6xApYdFvbzruwNGKC fzoEQ8ZNbOkBIBS2HBQ8LvQ== X-Google-Smtp-Source: AGHT+IHZp/clRKmQZ8fJk7ELtkAKGCrs2CU91VNe+31QXmURSkfx5SINiU/puhbXGTHvPt4yQyv2DjU9QK+SpStkvA== X-Received: from dionnaglaze.c.googlers.com ([fda3:e722:ac3:cc00:36:e7b8:ac13:c9e8]) (user=dionnaglaze job=sendgmr) by 2002:a05:690c:7307:b0:6ea:3c62:17c1 with SMTP id 00721157ae682-6eaddd75f83mr94917b3.1.1731022126529; Thu, 07 Nov 2024 15:28:46 -0800 (PST) Date: Thu, 7 Nov 2024 23:24:42 +0000 In-Reply-To: <20241107232457.4059785-1-dionnaglaze@google.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241107232457.4059785-1-dionnaglaze@google.com> X-Mailer: git-send-email 2.47.0.277.g8800431eea-goog Message-ID: <20241107232457.4059785-3-dionnaglaze@google.com> Subject: [PATCH v5 02/10] KVM: SVM: Fix snp_context_create error reporting From: Dionna Glaze To: linux-kernel@vger.kernel.org, x86@kernel.org, Sean Christopherson , Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Ashish Kalra , Brijesh Singh , Michael Roth Cc: linux-coco@lists.linux.dev, Dionna Glaze , Tom Lendacky , John Allen , Herbert Xu , "David S. Miller" , Luis Chamberlain , Russ Weight , Danilo Krummrich , Greg Kroah-Hartman , "Rafael J. Wysocki" , Tianfei zhang , Alexey Kardashevskiy , stable@vger.kernel.org, kvm@vger.kernel.org Failure to allocate should not return -ENOTTY. Command failure has multiple possible error modes. Fixes: 136d8bc931c8 ("KVM: SEV: Add KVM_SEV_SNP_LAUNCH_START command") CC: Sean Christopherson CC: Paolo Bonzini CC: Thomas Gleixner CC: Ingo Molnar CC: Borislav Petkov CC: Dave Hansen CC: Ashish Kalra CC: Tom Lendacky CC: John Allen CC: Herbert Xu CC: "David S. Miller" CC: Michael Roth CC: Luis Chamberlain CC: Russ Weight CC: Danilo Krummrich CC: Greg Kroah-Hartman CC: "Rafael J. Wysocki" CC: Tianfei zhang CC: Alexey Kardashevskiy CC: stable@vger.kernel.org Signed-off-by: Dionna Glaze --- arch/x86/kvm/svm/sev.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 357906375ec59..d0e0152aefb32 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2171,7 +2171,7 @@ static void *snp_context_create(struct kvm *kvm, struct kvm_sev_cmd *argp) /* Allocate memory for context page */ context = snp_alloc_firmware_page(GFP_KERNEL_ACCOUNT); if (!context) - return NULL; + return ERR_PTR(-ENOMEM); data.address = __psp_pa(context); rc = __sev_issue_cmd(argp->sev_fd, SEV_CMD_SNP_GCTX_CREATE, &data, &argp->error); @@ -2179,7 +2179,7 @@ static void *snp_context_create(struct kvm *kvm, struct kvm_sev_cmd *argp) pr_warn("Failed to create SEV-SNP context, rc %d fw_error %d", rc, argp->error); snp_free_firmware_page(context); - return NULL; + return ERR_PTR(rc); } return context; @@ -2227,8 +2227,8 @@ static int snp_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp) return -EINVAL; sev->snp_context = snp_context_create(kvm, argp); - if (!sev->snp_context) - return -ENOTTY; + if (IS_ERR(sev->snp_context)) + return PTR_ERR(sev->snp_context); start.gctx_paddr = __psp_pa(sev->snp_context); start.policy = params.policy;