From b05731f92707c08fb645673b76749e4c6bab9120 Mon Sep 17 00:00:00 2001
From: Kevin Loughlin <kevlough@umich.edu>
Date: Thu, 18 Feb 2021 14:52:23 -0500
Subject: [PATCH] arch-x86: Adds rdtscp flag to cpuid for X86KvmCPU

The rdtscp instruction is supported by gem5, so the X86KvmCPU
cpuid flags should be updated accordingly. Otherwise, KVM
needlessly crashes upon executing rdtscp.

Change-Id: If79017e60cbdf0757e929f07e56dba64322846bb
Signed-off-by: Kevin Loughlin <kevlough@umich.edu>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/41633
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
---
 src/arch/x86/cpuid.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/arch/x86/cpuid.cc b/src/arch/x86/cpuid.cc
index 2a560f510a..ae1ba2efc7 100644
--- a/src/arch/x86/cpuid.cc
+++ b/src/arch/x86/cpuid.cc
@@ -104,7 +104,7 @@ namespace X86ISA {
                 break;
               case FamilyModelSteppingBrandFeatures:
                 result = CpuidResult(0x00020f51, 0x00000405,
-                                     0xe3d3fbff, 0x00000001);
+                                     0xebd3fbff, 0x00000001);
                 break;
               case NameString1:
               case NameString2:
@@ -165,7 +165,7 @@ namespace X86ISA {
                 break;
               case FamilyModelStepping:
                 result = CpuidResult(0x00020f51, 0x00000805,
-                                     0xe7dbfbff, 0x00000209);
+                                     0xefdbfbff, 0x00000209);
                 break;
               case ExtendedFeatures:
                 result = CpuidResult(0x00000000, 0x01800000,