Re: [PATCH Part1 v5 11/38] x86/compressed: Add helper for validating pages in the decompression stage
From: Borislav Petkov <bp@alien8.de>
Date: 2021-08-23 14:16:30
Also in:
kvm, linux-coco, linux-mm, lkml, platform-driver-x86
On Fri, Aug 20, 2021 at 10:19:06AM -0500, Brijesh Singh wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/sev-common.h index d426c30ae7b4..1cd8ce838af8 100644 --- a/arch/x86/include/asm/sev-common.h +++ b/arch/x86/include/asm/sev-common.h@@ -57,6 +57,26 @@ #define GHCB_MSR_AP_RESET_HOLD_REQ 0x006 #define GHCB_MSR_AP_RESET_HOLD_RESP 0x007 +/* SNP Page State Change */
Let's make it very clear here that those cmd numbers below are actually part of the protocol and not randomly chosen: /* * ... * * 0x014 – SNP Page State Change Request * * GHCBData[55:52] – Page operation: * 0x0001 – Page assignment, Private * 0x0002 – Page assignment, Shared */
+enum psc_op {
+ SNP_PAGE_STATE_PRIVATE = 1,
+ SNP_PAGE_STATE_SHARED,
+};
+
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette