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    Subject[PATCH 5.4 420/434] x86/intel: Disable HPET on Intel Coffee Lake H platforms
    Date
    From: Kai-Heng Feng <kai.heng.feng@canonical.com>

    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@canonical.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: bp@alien8.de
    Cc: feng.tang@intel.com
    Cc: harry.pan@intel.com
    Cc: hpa@zytor.com
    Link: https://lkml.kernel.org/r/20191129062303.18982-1-kai.heng.feng@canonical.com
    Signed-off-by: Ingo Molnar <mingo@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    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,

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