From: Matthias Kruk <m@m10k.eu>
Date: Tue, 3 Sep 2019 16:00:49 +0000 (+0900)
Subject: Make sure the upper half of eax as returned by cpu_set_pstate() is zero
X-Git-Url: https://git.corax.cc/?a=commitdiff_plain;h=1ee977e98d3053b96ff9d0a965215b8a34061a02;p=corax

Make sure the upper half of eax as returned by cpu_set_pstate() is zero
---

diff --git a/kernel/arch/cpu32.S b/kernel/arch/cpu32.S
index 211f3d1..1d0fb7b 100644
--- a/kernel/arch/cpu32.S
+++ b/kernel/arch/cpu32.S
@@ -61,6 +61,7 @@ cpu_set_pstate:
 	movl	$0x199, %ecx
 	rdmsr
 	movl	8(%esp), %ebx
+	xorl    %eax, %eax
 	movw	%bx, %ax
 	wrmsr
 	popl	%ebx