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ce21efa858
- Pull in fixes for TSC calibration driver preference (prefer pmtimer over PIT) to boot on Apollo Lake systems with no PIT - Fix pmtimer calibration to not take forever to fail on kvm. Signed-off-by: Peter Jones <pjones@redhat.com>
32 lines
1.4 KiB
Diff
32 lines
1.4 KiB
Diff
From 8a8023951ccdf08035a58cefe6ff98098e2c4029 Mon Sep 17 00:00:00 2001
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From: "David E. Box" <david.e.box@linux.intel.com>
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Date: Fri, 15 Sep 2017 15:37:05 -0700
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Subject: [PATCH 122/123] tsc: Change default tsc calibration method to pmtimer
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on EFI systems
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On efi systems, make pmtimer based tsc calibration the default over the
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pit. This prevents Grub from hanging on Intel SoC systems that power gate
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the pit.
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Signed-off-by: David E. Box <david.e.box@linux.intel.com>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/kern/i386/tsc.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/grub-core/kern/i386/tsc.c b/grub-core/kern/i386/tsc.c
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index 2e85289d8..f266eb131 100644
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--- a/grub-core/kern/i386/tsc.c
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+++ b/grub-core/kern/i386/tsc.c
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@@ -68,7 +68,7 @@ grub_tsc_init (void)
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#ifdef GRUB_MACHINE_XEN
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(void) (grub_tsc_calibrate_from_xen () || calibrate_tsc_hardcode());
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#elif defined (GRUB_MACHINE_EFI)
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- (void) (grub_tsc_calibrate_from_pit () || grub_tsc_calibrate_from_pmtimer () || grub_tsc_calibrate_from_efi() || calibrate_tsc_hardcode());
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+ (void) (grub_tsc_calibrate_from_pmtimer () || grub_tsc_calibrate_from_pit () || grub_tsc_calibrate_from_efi() || calibrate_tsc_hardcode());
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#elif defined (GRUB_MACHINE_COREBOOT)
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(void) (grub_tsc_calibrate_from_pmtimer () || grub_tsc_calibrate_from_pit () || calibrate_tsc_hardcode());
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#else
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--
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2.14.3
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