Re: [PATCH v14 03/13] x86/sev: Add Secure TSC support for SNP guests

[Borislav Petkov]

On Mon, Nov 11, 2024 at 12:33:28PM +0530, Nikunj A. Dadhania wrote:
> kmalloc() does not work at this stage. Moreover, mem_encrypt_setup_arch()
> does not have CC_ATTR_GUEST_SEV_SNP check.

Bah, let's simplify it then:

diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
index 996ca27f0b72..95bae74fdab2 100644
--- a/arch/x86/mm/mem_encrypt.c
+++ b/arch/x86/mm/mem_encrypt.c
@@ -94,9 +94,7 @@ void __init mem_encrypt_init(void)
 	/* Call into SWIOTLB to update the SWIOTLB DMA buffers */
 	swiotlb_update_mem_attributes();
 
-	/* Initialize SNP Secure TSC */
-	if (cc_platform_has(CC_ATTR_GUEST_SEV_SNP))
-		snp_secure_tsc_prepare();
+	snp_secure_tsc_prepare();
 
 	print_mem_encrypt_feature_info();
 }

-- 
Regards/Gruss,
    Boris.

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