diff mbox series

[v6,35/42] x86/compressed/64: store Confidential Computing blob address in bootparams

Message ID 20211008180453.462291-36-brijesh.singh@amd.com (mailing list archive)
State New
Headers show
Series Add AMD Secure Nested Paging (SEV-SNP) Guest Support | expand

Commit Message

Brijesh Singh Oct. 8, 2021, 6:04 p.m. UTC 
From: Michael Roth <michael.roth@amd.com>

When the Confidential Computing blob is located by the boot/compressed
kernel, store a pointer to it in bootparams->cc_blob_address to avoid
the need for the run-time kernel to rescan the EFI config table to find
it again.

Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
 arch/x86/boot/compressed/sev.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c
index 60885d80bf5f..9d6a2ecb609f 100644
--- a/arch/x86/boot/compressed/sev.c
+++ b/arch/x86/boot/compressed/sev.c
@@ -375,4 +375,11 @@  void snp_cpuid_init_boot(struct boot_params *bp)
 	/* It should be safe to read SEV MSR and check features now. */
 	if (!sev_snp_enabled())
 		sev_es_terminate(1, GHCB_TERM_CPUID);
+
+	/*
+	 * Pass run-time kernel a pointer to CC info via boot_params so EFI
+	 * config table doesn't need to be searched again during early startup
+	 * phase.
+	 */
+	bp->cc_blob_address = (u32)(unsigned long)cc_info;
 }