From: Tom Lendacky <thomas.lendacky@amd.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org,
iommu@lists.linux-foundation.org, kvm@vger.kernel.org,
linux-efi@vger.kernel.org, platform-driver-x86@vger.kernel.org,
linux-graphics-maintainer@vmware.com,
amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
kexec@lists.infradead.org, linux-fsdevel@vger.kernel.org
Cc: Borislav Petkov <bp@alien8.de>,
Brijesh Singh <brijesh.singh@amd.com>,
Joerg Roedel <joro@8bytes.org>, Andi Kleen <ak@linux.intel.com>,
Sathyanarayanan Kuppuswamy
<sathyanarayanan.kuppuswamy@linux.intel.com>,
Tianyu Lan <Tianyu.Lan@microsoft.com>
Subject: [PATCH 01/11] mm: Introduce a function to check for virtualization protection features
Date: Tue, 27 Jul 2021 17:26:04 -0500 [thread overview]
Message-ID: <cbc875b1d2113225c2b44a2384d5b303d0453cf7.1627424774.git.thomas.lendacky@amd.com> (raw)
In-Reply-To: <cover.1627424773.git.thomas.lendacky@amd.com>
In prep for other protected virtualization technologies, introduce a
generic helper function, prot_guest_has(), that can be used to check
for specific protection attributes, like memory encryption. This is
intended to eliminate having to add multiple technology-specific checks
to the code (e.g. if (sev_active() || tdx_active())).
Co-developed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Co-developed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
arch/Kconfig | 3 +++
include/linux/protected_guest.h | 32 ++++++++++++++++++++++++++++++++
2 files changed, 35 insertions(+)
create mode 100644 include/linux/protected_guest.h
diff --git a/arch/Kconfig b/arch/Kconfig
index 129df498a8e1..a47cf283f2ff 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -1231,6 +1231,9 @@ config RELR
config ARCH_HAS_MEM_ENCRYPT
bool
+config ARCH_HAS_PROTECTED_GUEST
+ bool
+
config HAVE_SPARSE_SYSCALL_NR
bool
help
diff --git a/include/linux/protected_guest.h b/include/linux/protected_guest.h
new file mode 100644
index 000000000000..f8ed7b72967b
--- /dev/null
+++ b/include/linux/protected_guest.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Protected Guest (and Host) Capability checks
+ *
+ * Copyright (C) 2021 Advanced Micro Devices, Inc.
+ *
+ * Author: Tom Lendacky <thomas.lendacky@amd.com>
+ */
+
+#ifndef _PROTECTED_GUEST_H
+#define _PROTECTED_GUEST_H
+
+#ifndef __ASSEMBLY__
+
+#define PATTR_MEM_ENCRYPT 0 /* Encrypted memory */
+#define PATTR_HOST_MEM_ENCRYPT 1 /* Host encrypted memory */
+#define PATTR_GUEST_MEM_ENCRYPT 2 /* Guest encrypted memory */
+#define PATTR_GUEST_PROT_STATE 3 /* Guest encrypted state */
+
+#ifdef CONFIG_ARCH_HAS_PROTECTED_GUEST
+
+#include <asm/protected_guest.h>
+
+#else /* !CONFIG_ARCH_HAS_PROTECTED_GUEST */
+
+static inline bool prot_guest_has(unsigned int attr) { return false; }
+
+#endif /* CONFIG_ARCH_HAS_PROTECTED_GUEST */
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _PROTECTED_GUEST_H */
--
2.32.0
next prev parent reply other threads:[~2021-07-27 22:27 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-27 22:26 [PATCH 00/11] Implement generic prot_guest_has() helper function Tom Lendacky
2021-07-27 22:26 ` Tom Lendacky [this message]
2021-07-28 13:17 ` [PATCH 01/11] mm: Introduce a function to check for virtualization protection features Christoph Hellwig
2021-07-28 16:28 ` Borislav Petkov
2021-08-02 10:34 ` Joerg Roedel
2021-08-11 14:53 ` Kuppuswamy, Sathyanarayanan
2021-08-11 15:39 ` Tom Lendacky
2021-07-27 22:26 ` [PATCH 02/11] x86/sev: Add an x86 version of prot_guest_has() Tom Lendacky
2021-07-28 13:22 ` Christoph Hellwig
2021-07-29 14:24 ` Tom Lendacky
2021-08-02 10:35 ` Joerg Roedel
2021-07-27 22:26 ` [PATCH 03/11] powerpc/pseries/svm: Add a powerpc " Tom Lendacky
2021-07-27 22:26 ` [PATCH 04/11] x86/sme: Replace occurrences of sme_active() with prot_guest_has() Tom Lendacky
2021-08-02 10:37 ` Joerg Roedel
2021-07-27 22:26 ` [PATCH 05/11] x86/sev: Replace occurrences of sev_active() " Tom Lendacky
2021-08-02 10:42 ` Joerg Roedel
2021-07-27 22:26 ` [PATCH 06/11] x86/sev: Replace occurrences of sev_es_active() " Tom Lendacky
2021-08-02 10:45 ` Joerg Roedel
2021-08-09 21:59 ` Tom Lendacky
2021-08-09 22:08 ` Kuppuswamy, Sathyanarayanan
2021-07-27 22:26 ` [PATCH 07/11] treewide: Replace the use of mem_encrypt_active() " Tom Lendacky
2021-07-30 22:34 ` Sean Christopherson
2021-08-09 21:55 ` Tom Lendacky
2021-08-02 12:42 ` Christophe Leroy
2021-08-09 22:04 ` Tom Lendacky
2021-08-10 18:45 ` Kuppuswamy, Sathyanarayanan
2021-08-10 19:48 ` Tom Lendacky
2021-08-10 20:09 ` Kuppuswamy, Sathyanarayanan
2021-08-11 12:19 ` Kirill A. Shutemov
2021-08-11 15:52 ` Tom Lendacky
2021-08-12 10:07 ` Kirill A. Shutemov
2021-08-13 17:08 ` Tom Lendacky
2021-08-13 20:17 ` Tom Lendacky
2021-07-27 22:26 ` [PATCH 08/11] mm: Remove the now unused mem_encrypt_active() function Tom Lendacky
2021-08-02 10:47 ` Joerg Roedel
2021-07-27 22:26 ` [PATCH 09/11] x86/sev: " Tom Lendacky
2021-08-02 10:46 ` Joerg Roedel
2021-07-27 22:26 ` [PATCH 10/11] powerpc/pseries/svm: " Tom Lendacky
2021-07-27 22:26 ` [PATCH 11/11] s390/mm: " Tom Lendacky
2021-07-27 22:37 ` [PATCH 00/11] Implement generic prot_guest_has() helper function Tom Lendacky
2021-07-28 11:50 ` Christian König
2021-08-09 1:41 ` Kuppuswamy, Sathyanarayanan
2021-08-09 22:16 ` Tom Lendacky
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