grub2/0089-tsc-Change-default-tsc-calibration-method-to-pmtimer.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: "David E. Box" <david.e.box@linux.intel.com>
Date: Fri, 15 Sep 2017 15:37:05 -0700
Subject: [PATCH] tsc: Change default tsc calibration method to pmtimer on EFI
 systems

On efi systems, make pmtimer based tsc calibration the default over the
pit. This prevents Grub from hanging on Intel SoC systems that power gate
the pit.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 grub-core/kern/i386/tsc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/grub-core/kern/i386/tsc.c b/grub-core/kern/i386/tsc.c
index 2e85289d848..f266eb13185 100644
--- a/grub-core/kern/i386/tsc.c
+++ b/grub-core/kern/i386/tsc.c
@@ -68,7 +68,7 @@ grub_tsc_init (void)
 #ifdef GRUB_MACHINE_XEN
   (void) (grub_tsc_calibrate_from_xen () || calibrate_tsc_hardcode());
 #elif defined (GRUB_MACHINE_EFI)
-  (void) (grub_tsc_calibrate_from_pit () || grub_tsc_calibrate_from_pmtimer () || grub_tsc_calibrate_from_efi() || calibrate_tsc_hardcode());
+  (void) (grub_tsc_calibrate_from_pmtimer () || grub_tsc_calibrate_from_pit () || grub_tsc_calibrate_from_efi() || calibrate_tsc_hardcode());
 #elif defined (GRUB_MACHINE_COREBOOT)
   (void) (grub_tsc_calibrate_from_pmtimer () || grub_tsc_calibrate_from_pit () || calibrate_tsc_hardcode());
 #else