Messages in this thread | | | From | "Jason A. Donenfeld" <> | Date | Mon, 9 Dec 2019 14:52:31 +0100 | Subject | Re: [PATCH] x86/quirks: disable HPET on Intel Coffee Lake Refresh platforms |
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Hey Thomas,
Can we perhaps get this into 5.5-rc2?
It'd be nice if Intel could give us a list of SKUs that are affected (as you asked in another email thread), but barring that, the best we can do is whack-a-mole like this. I'm typing you this email on the hardware that this patch addresses.
Jason
On Tue, Dec 3, 2019 at 9:57 PM Jason A. Donenfeld <Jason@zx2c4.com> wrote: > > This is a follow up of fc5db58539b4 ("x86/quirks: Disable HPET on Intel > Coffe Lake platforms"), which addressed the issue for 8th generation > Coffee Lake. Intel has released Coffee Lake again for 9th generation, > apparently still with the same bug: > > clocksource: timekeeping watchdog on CPU3: Marking clocksource 'tsc' as unstable because the skew is too large: > clocksource: 'hpet' wd_now: 24f422b8 wd_last: 247dea41 mask: ffffffff > clocksource: 'tsc' cs_now: 144d927c4e cs_last: 140ba6e2a0 mask: ffffffffffffffff > tsc: Marking TSC unstable due to clocksource watchdog > TSC found unstable after boot, most likely due to broken BIOS. Use 'tsc=unstable'. > sched_clock: Marking unstable (26553416234, 4203921)<-(26567277071, -9656937) > clocksource: Switched to clocksource hpet > > So, we add another quirk for the chipset > > Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> > Cc: Feng Tang <feng.tang@intel.com> > Cc: Kai-Heng Feng <kai.heng.feng@canonical.com> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: stable@vger.kernel.org > --- > arch/x86/kernel/early-quirks.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c > index 4cba91ec8049..a73f88dd7f86 100644 > --- a/arch/x86/kernel/early-quirks.c > +++ b/arch/x86/kernel/early-quirks.c > @@ -712,6 +712,8 @@ static struct chipset early_qrk[] __initdata = { > 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_INTEL, 0x3e20, > + PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, force_disable_hpet}, > { PCI_VENDOR_ID_BROADCOM, 0x4331, > PCI_CLASS_NETWORK_OTHER, PCI_ANY_ID, 0, apple_airport_reset}, > {} > -- > 2.24.0
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