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From eb7059767c82d833ebecdf8106e96482b04f3c40 Mon Sep 17 00:00:00 2001
From: Jan Beulich <jbeulich@suse.com>
Date: Mon, 29 Apr 2024 09:36:37 +0200
Subject: [PATCH 04/56] x86/MTRR: correct inadvertently inverted WC check
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The ! clearly got lost by mistake.
Fixes: e9e0eb30d4d6 ("x86/MTRR: avoid several indirect calls")
Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
master commit: 77e25f0e30ddd11e043e6fce84bf108ce7de5b6f
master date: 2024-04-23 14:13:48 +0200
---
xen/arch/x86/cpu/mtrr/main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/arch/x86/cpu/mtrr/main.c b/xen/arch/x86/cpu/mtrr/main.c
index 55a4da54a7..90b235f57e 100644
--- a/xen/arch/x86/cpu/mtrr/main.c
+++ b/xen/arch/x86/cpu/mtrr/main.c
@@ -316,7 +316,7 @@ int mtrr_add_page(unsigned long base, unsigned long size,
}
/* If the type is WC, check that this processor supports it */
- if ((type == X86_MT_WC) && mtrr_have_wrcomb()) {
+ if ((type == X86_MT_WC) && !mtrr_have_wrcomb()) {
printk(KERN_WARNING
"mtrr: your processor doesn't support write-combining\n");
return -EOPNOTSUPP;
--
2.45.2
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