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Tue, 27 Jul 2021 22:27:09 +0000 From: Tom Lendacky 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 , Brijesh Singh , Joerg Roedel , Andi Kleen , Sathyanarayanan Kuppuswamy , Tianyu Lan , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras Subject: [PATCH 03/11] powerpc/pseries/svm: Add a powerpc version of prot_guest_has() Date: Tue, 27 Jul 2021 17:26:06 -0500 Message-Id: <19f7eefdc98e091fbfae9db0db575422f18f0543.1627424774.git.thomas.lendacky@amd.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: References: X-ClientProxiedBy: SA9PR13CA0001.namprd13.prod.outlook.com (2603:10b6:806:21::6) To DM4PR12MB5229.namprd12.prod.outlook.com (2603:10b6:5:398::12) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from tlendack-t1.amd.com (165.204.77.1) by SA9PR13CA0001.namprd13.prod.outlook.com (2603:10b6:806:21::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4373.7 via Frontend Transport; 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This will be used to replace the powerpc mem_encrypt_active() implementation, so the implementation will initially only support the PATTR_MEM_ENCRYPT attribute. Cc: Michael Ellerman Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Signed-off-by: Tom Lendacky --- arch/powerpc/include/asm/protected_guest.h | 30 ++++++++++++++++++++++ arch/powerpc/platforms/pseries/Kconfig | 1 + 2 files changed, 31 insertions(+) create mode 100644 arch/powerpc/include/asm/protected_guest.h diff --git a/arch/powerpc/include/asm/protected_guest.h b/arch/powerpc/include/asm/protected_guest.h new file mode 100644 index 000000000000..ce55c2c7e534 --- /dev/null +++ b/arch/powerpc/include/asm/protected_guest.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Protected Guest (and Host) Capability checks + * + * Copyright (C) 2021 Advanced Micro Devices, Inc. + * + * Author: Tom Lendacky + */ + +#ifndef _POWERPC_PROTECTED_GUEST_H +#define _POWERPC_PROTECTED_GUEST_H + +#include + +#ifndef __ASSEMBLY__ + +static inline bool prot_guest_has(unsigned int attr) +{ + switch (attr) { + case PATTR_MEM_ENCRYPT: + return is_secure_guest(); + + default: + return false; + } +} + +#endif /* __ASSEMBLY__ */ + +#endif /* _POWERPC_PROTECTED_GUEST_H */ diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig index 5e037df2a3a1..8ce5417d6feb 100644 --- a/arch/powerpc/platforms/pseries/Kconfig +++ b/arch/powerpc/platforms/pseries/Kconfig @@ -159,6 +159,7 @@ config PPC_SVM select SWIOTLB select ARCH_HAS_MEM_ENCRYPT select ARCH_HAS_FORCE_DMA_UNENCRYPTED + select ARCH_HAS_PROTECTED_GUEST help There are certain POWER platforms which support secure guests using the Protected Execution Facility, with the help of an Ultravisor