This is a note to let you know that I've just added the patch titled
x86/intel: Disable HPET on Intel Coffee Lake H platforms
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-intel-disable-hpet-on-intel-coffee-lake-h-platforms.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f8edbde885bbcab6a2b4a1b5ca614e6ccb807577 Mon Sep 17 00:00:00 2001
From: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
Date: Fri, 29 Nov 2019 14:23:02 +0800
Subject: x86/intel: Disable HPET on Intel Coffee Lake H platforms
From: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
commit f8edbde885bbcab6a2b4a1b5ca614e6ccb807577 upstream.
Coffee Lake H SoC has similar behavior as Coffee Lake, skewed HPET timer
once the SoCs entered PC10.
So let's disable HPET on CFL-H platforms.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: bp@xxxxxxxxx
Cc: feng.tang@xxxxxxxxx
Cc: harry.pan@xxxxxxxxx
Cc: hpa@xxxxxxxxx
Link: https://lkml.kernel.org/r/20191129062303.18982-1-kai.heng.feng@xxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/early-quirks.c | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -710,6 +710,8 @@ static struct chipset early_qrk[] __init
*/
{ PCI_VENDOR_ID_INTEL, 0x0f00,
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, force_disable_hpet},
+ { PCI_VENDOR_ID_INTEL, 0x3e20,
+ PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, force_disable_hpet},
{ PCI_VENDOR_ID_INTEL, 0x3ec4,
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, force_disable_hpet},
{ PCI_VENDOR_ID_BROADCOM, 0x4331,
Patches currently in stable-queue which might be from kai.heng.feng@xxxxxxxxxxxxx are
queue-5.4/x86-intel-disable-hpet-on-intel-coffee-lake-h-platforms.patch
