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crypto: ccp - Add support for SEV-ES to the PSP driver

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To provide support for SEV-ES, the hypervisor must provide an area of
memory to the PSP. Once this Trusted Memory Region (TMR) is provided to
the PSP, the contents of this area of memory are no longer available to
the x86.

Update the PSP driver to allocate a 1MB region for the TMR that is 1MB
aligned and then provide it to the PSP through the SEV INIT command.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tom Lendacky 2020-04-21 12:44:49 -05:00 • committed by Herbert Xu
parent 3c2214b602
commit 97f9ac3db6
3 changed files with 47 additions and 0 deletions
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2
include/linux/psp-sev.h
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@ -100,6 +100,8 @@ struct sev_data_init {
u32 tmr_len; /* In */
} __packed;
#define SEV_INIT_FLAGS_SEV_ES 0x01
/**
* struct sev_data_pek_csr - PEK_CSR command parameters
*