Re: [RFC PATCH v4 07/28] x86: Provide general kernel support for memory encryption
From: Borislav Petkov <bp@alien8.de>
Date: 2017-02-20 18:38:53
Also in:
kvm, linux-arch, linux-iommu, linux-mm, lkml
On Thu, Feb 16, 2017 at 09:43:32AM -0600, Tom Lendacky wrote:
Adding general kernel support for memory encryption includes: - Modify and create some page table macros to include the Secure Memory Encryption (SME) memory encryption mask - Modify and create some macros for calculating physical and virtual memory addresses - Provide an SME initialization routine to update the protection map with the memory encryption mask so that it is used by default - #undef CONFIG_AMD_MEM_ENCRYPT in the compressed boot path Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
...
quoted hunk ↗ jump to hunk
+#define __sme_pa(x) (__pa((x)) | sme_me_mask) +#define __sme_pa_nodebug(x) (__pa_nodebug((x)) | sme_me_mask) + #else /* !CONFIG_AMD_MEM_ENCRYPT */ #ifndef sme_me_mask@@ -35,6 +42,13 @@ static inline bool sme_active(void) } #endif +static inline void __init sme_early_init(void) +{ +} + +#define __sme_pa __pa +#define __sme_pa_nodebug __pa_nodebug
One more thing - in the !CONFIG_AMD_MEM_ENCRYPT case, sme_me_mask is 0
so you don't need to define __sme_pa* again.
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.