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From 320207a3df995771af36639c7bdf89c4203cf1c2 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 14 Jun 2024 11:45:53 +0200
Subject: [PATCH] MdePkg/X86UnitTestHost: set rdrand cpuid bit
Set the rdrand feature bit when faking cpuid for host test cases.
Needed to make the CryptoPkg test cases work.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 5e776299a2604b336a947e68593012ab2cc16eb4)
---
MdePkg/Library/BaseLib/X86UnitTestHost.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/MdePkg/Library/BaseLib/X86UnitTestHost.c b/MdePkg/Library/BaseLib/X86UnitTestHost.c
index 8ba4f54a38..7f7276f7f4 100644
--- a/MdePkg/Library/BaseLib/X86UnitTestHost.c
+++ b/MdePkg/Library/BaseLib/X86UnitTestHost.c
@@ -66,6 +66,15 @@ UnitTestHostBaseLibAsmCpuid (
OUT UINT32 *Edx OPTIONAL
)
{
+ UINT32 RetEcx;
+
+ RetEcx = 0;
+ switch (Index) {
+ case 1:
+ RetEcx |= BIT30; /* RdRand */
+ break;
+ }
+
if (Eax != NULL) {
*Eax = 0;
}
@@ -75,7 +84,7 @@ UnitTestHostBaseLibAsmCpuid (
}
if (Ecx != NULL) {
- *Ecx = 0;
+ *Ecx = RetEcx;
}
if (Edx != NULL) {
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