On Mon, Aug 26, 2019 at 02:16:04PM +0800, Xiaochun Lee wrote:
> From: Xiaochun Lee <lix...@lenovo.com>
>
> When enabled Firmware First mode in UEFI, we need to
> set the cmci_disabled and ignore_ce in mca cfg
> that users can check correct status from
> "/sys/devices/system/machinecheck/machinecheckXXX/cmci_disabled"
>
> Signed-off-by: Xiaochun Lee <lix...@lenovo.com>
> ---
> arch/x86/kernel/cpu/mce/core.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
> index 743370e..932c701 100644
> --- a/arch/x86/kernel/cpu/mce/core.c
> +++ b/arch/x86/kernel/cpu/mce/core.c
> @@ -1909,6 +1909,8 @@ static void __mce_disable_bank(void *arg)
> int bank = *((int *)arg);
> __clear_bit(bank, this_cpu_ptr(mce_poll_banks));
> cmci_disable_bank(bank);
> + mca_cfg.cmci_disabled = true;
> + mca_cfg.ignore_ce = true;
That's the global switch which gets written here for every bank. But
you want to disable it per bank, not globally because the list of banks
arch_apei_enable_cmcff() receives might not be all banks in the system
which are in FF mode.
Then, writing
/sys/devices/system/machinecheck/machinecheckXXX/cmci_disabled from a
different CPU and for a different bank reenables cmci again so you need
to think of a better way how to address the per-bank thing and then to
make it non-modifiable in FF mode so that it cannot be reenabled from
sysfs again.
Thx.
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
