diff options
Diffstat (limited to '0006-tsc-Change-default-tsc-calibration-method-to-pmtimer-on-EFI-systems.patch')
| -rw-r--r-- | 0006-tsc-Change-default-tsc-calibration-method-to-pmtimer-on-EFI-systems.patch | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/0006-tsc-Change-default-tsc-calibration-method-to-pmtimer-on-EFI-systems.patch b/0006-tsc-Change-default-tsc-calibration-method-to-pmtimer-on-EFI-systems.patch new file mode 100644 index 000000000000..38dcddad6ab0 --- /dev/null +++ b/0006-tsc-Change-default-tsc-calibration-method-to-pmtimer-on-EFI-systems.patch @@ -0,0 +1,31 @@ +From 446794de8da4329ea532cbee4ca877bcafd0e534 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: 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 2e85289d8..f266eb131 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 +-- +cgit v1.1-26-g67d0 + |