diff options
| author |   Michael Roth <michael.roth@amd.com> | 2022-02-24 10:56:18 -0600 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2022-04-07 16:47:11 +0200 |
| commit | b190a043c49af4587f5e157053f909192820522a (patch) | |
| tree | 1cb7b0e4fe544e2d9506fe8bad441bd535eea461 /arch/x86/boot | |
| parent | x86/compressed/64: Add identity mapping for Confidential Computing blob (diff) | |
| download | linux-dev-b190a043c49af4587f5e157053f909192820522a.tar.xz linux-dev-b190a043c49af4587f5e157053f909192820522a.zip | |
x86/sev: Add SEV-SNP feature detection/setup
Initial/preliminary detection of SEV-SNP is done via the Confidential
Computing blob. Check for it prior to the normal SEV/SME feature
initialization, and add some sanity checks to confirm it agrees with
SEV-SNP CPUID/MSR bits.
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220307213356.2797205-39-brijesh.singh@amd.com
Diffstat (limited to 'arch/x86/boot')
| -rw-r--r-- | arch/x86/boot/compressed/sev.c | 27 |
1 files changed, 0 insertions, 27 deletions
diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c index 1e4930ce2c95..82079ce7be06 100644 --- a/arch/x86/boot/compressed/sev.c +++ b/arch/x86/boot/compressed/sev.c @@ -352,33 +352,6 @@ static struct cc_blob_sev_info *find_cc_blob_efi(struct boot_params *bp) EFI_CC_BLOB_GUID); } -struct cc_setup_data { - struct setup_data header; - u32 cc_blob_address; -}; - -/* - * Search for a Confidential Computing blob passed in as a setup_data entry - * via the Linux Boot Protocol. - */ -static struct cc_blob_sev_info *find_cc_blob_setup_data(struct boot_params *bp) -{ - struct cc_setup_data *sd = NULL; - struct setup_data *hdr; - - hdr = (struct setup_data *)bp->hdr.setup_data; - - while (hdr) { - if (hdr->type == SETUP_CC_BLOB) { - sd = (struct cc_setup_data *)hdr; - return (struct cc_blob_sev_info *)(unsigned long)sd->cc_blob_address; - } - hdr = (struct setup_data *)hdr->next; - } - - return NULL; -} - /* * Initial set up of SNP relies on information provided by the * Confidential Computing blob, which can be passed to the boot kernel |