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| author | Ashish Kalra <ashish.kalra@amd.com> | 2025-07-21 14:13:55 +0000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2025-08-16 17:20:23 +0800 |
| commit | c9760b0fca6bfa250c02e14bfe81c542f3626a72 (patch) | |
| tree | f9b825d47fc8649b61ddbc63d84102a81aec3334 /include | |
| parent | crypto: ccp - Introduce new API interface to indicate SEV-SNP Ciphertext hidi... (diff) | |
| download | linux-c9760b0fca6bfa250c02e14bfe81c542f3626a72.tar.gz linux-c9760b0fca6bfa250c02e14bfe81c542f3626a72.zip | |
crypto: ccp - Add support to enable CipherTextHiding on SNP_INIT_EX
To enable ciphertext hiding, it must be specified in the SNP_INIT_EX
command as part of SNP initialization.
Modify the sev_platform_init_args structure, which is used as input to
sev_platform_init(), to include a field that, when non-zero,
indicates that ciphertext hiding should be enabled and specifies the
maximum ASID that can be used for an SEV-SNP guest.
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Reviewed-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/psp-sev.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h index d83185b4268b..e0dbcb4b4fd9 100644 --- a/include/linux/psp-sev.h +++ b/include/linux/psp-sev.h @@ -748,10 +748,13 @@ struct sev_data_snp_guest_request { struct sev_data_snp_init_ex { u32 init_rmp:1; u32 list_paddr_en:1; - u32 rsvd:30; + u32 rapl_dis:1; + u32 ciphertext_hiding_en:1; + u32 rsvd:28; u32 rsvd1; u64 list_paddr; - u8 rsvd2[48]; + u16 max_snp_asid; + u8 rsvd2[46]; } __packed; /** @@ -800,10 +803,13 @@ struct sev_data_snp_shutdown_ex { * @probe: True if this is being called as part of CCP module probe, which * will defer SEV_INIT/SEV_INIT_EX firmware initialization until needed * unless psp_init_on_probe module param is set + * @max_snp_asid: When non-zero, enable ciphertext hiding and specify the + * maximum ASID that can be used for an SEV-SNP guest. */ struct sev_platform_init_args { int error; bool probe; + unsigned int max_snp_asid; }; /** |