Messages in this thread Patch in this message | | | From | Tom Lendacky <> | Subject | [PATCH 03/11] powerpc/pseries/svm: Add a powerpc version of prot_guest_has() | Date | Tue, 27 Jul 2021 17:26:06 -0500 |
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Introduce a powerpc version of the prot_guest_has() function. 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 <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> --- 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 <thomas.lendacky@amd.com> + */ + +#ifndef _POWERPC_PROTECTED_GUEST_H +#define _POWERPC_PROTECTED_GUEST_H + +#include <asm/svm.h> + +#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 -- 2.32.0
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