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From: "Ankur Arora" <ankur.a.arora@oracle.com>
To: devel@edk2.groups.io
Cc: Ankur Arora <ankur.a.arora@oracle.com>,
	Liming Gao <gaoliming@byosoft.com.cn>,
	Michael D Kinney <michael.d.kinney@intel.com>
Subject: [PATCH] MdePkg: use CpuPause() in CpuDeadLoop()
Date: Tue, 16 Mar 2021 15:59:18 -0700	[thread overview]
Message-ID: <20210316225918.2625938-1-ankur.a.arora@oracle.com> (raw)

Use CpuPause() to allow the CPU to go into a lower power state
state while we spin wait.

Cc: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
---
 MdePkg/Library/BaseLib/CpuDeadLoop.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/MdePkg/Library/BaseLib/CpuDeadLoop.c b/MdePkg/Library/BaseLib/CpuDeadLoop.c
index 9e110cacbc96..3cd304351a65 100644
--- a/MdePkg/Library/BaseLib/CpuDeadLoop.c
+++ b/MdePkg/Library/BaseLib/CpuDeadLoop.c
@@ -28,5 +28,7 @@ CpuDeadLoop (
 {
   volatile UINTN  Index;
 
-  for (Index = 0; Index == 0;);
+  for (Index = 0; Index == 0;) {
+    CpuPause();
+  }
 }
-- 
2.9.3


             reply	other threads:[~2021-03-16 22:59 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16 22:59 Ankur Arora [this message]
2021-03-17  1:08 ` 回复: [PATCH] MdePkg: use CpuPause() in CpuDeadLoop() gaoliming
2021-03-17  3:54   ` Ankur Arora
2021-03-17 18:30 ` [edk2-devel] " Laszlo Ersek

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