From 5a2f19619a47ac92ea2ef3320a114d5d3ab6af11 Mon Sep 17 00:00:00 2001
From: Jagannathan Raman <jraman567@gmail.com>
Date: Sat, 1 Feb 2025 10:22:56 +0100
Subject: [PATCH] fix(ParseSnpPolicy): fix the reserved bitfield in the guest
 policy structure

Newer SEV-SNP specification steals some of the reserved bits. Update code
to keep up with the spec.

Signed-off-by: Jagannathan Raman<jraman567@gmail.com>
---
 abi/abi.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/abi/abi.go b/abi/abi.go
index 821c9b3..b18b5cc 100644
--- a/abi/abi.go
+++ b/abi/abi.go
@@ -220,7 +220,7 @@ func ParseSnpPolicy(guestPolicy uint64) (SnpPolicy, error) {
 	if guestPolicy&uint64(1<<policyReserved1bit) == 0 {
 		return result, fmt.Errorf("policy[%d] is reserved, must be 1, got 0", policyReserved1bit)
 	}
-	if err := mbz64(guestPolicy, "policy", 63, 21); err != nil {
+	if err := mbz64(guestPolicy, "policy", 63, 25); err != nil {
 		return result, err
 	}
 	result.ABIMinor = uint8(guestPolicy & 0xff)