On Mon, Mar 20, 2017 at 03:26:52PM -0500, Yazen Ghannam wrote:
> We need to find a UMC's channel number from mcheck code when translating
> UMC normalized addresses to system physical addresses. So move the function
> there from EDAC.
>
> Also, drop the struct pvt from the function parameters since we don't use
> it. And add a sanity check to make sure we're only looking at UMCs in case
> the UMC instance IDs ever match up with other bank types.
>
> Signed-off-by: Yazen Ghannam <yazen.ghan...@amd.com>
> ---
...
> diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c
> b/arch/x86/kernel/cpu/mcheck/mce_amd.c
> index 524cc57..10fddcc 100644
> --- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
> +++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
> @@ -755,6 +755,27 @@ int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8
> umc, u64 *sys_addr)
> }
> EXPORT_SYMBOL_GPL(umc_normaddr_to_sysaddr);
>
> +/*
> + * To find the UMC channel represented by this bank we need to match on its
> + * instance_id. The instance_id of a bank is held in the lower 32 bits of its
> + * IPID.
> + */
> +int find_umc_channel(struct mce *m)
> +{
> + u32 umc_instance_id[] = {0x50f00, 0x150f00};
> + u32 instance_id = m->ipid & GENMASK(31, 0);
> + int i, channel = -EINVAL;
> +
> + if (smca_banks[m->bank].hwid &&
> + smca_banks[m->bank].hwid->bank_type == SMCA_UMC)
> + for (i = 0; i < ARRAY_SIZE(umc_instance_id); i++)
> + if (umc_instance_id[i] == instance_id)
> + channel = i;
> +
> + return channel;
> +}
> +EXPORT_SYMBOL_GPL(find_umc_channel);
This is an exported function now so it should have a prefix. Maybe
"amd_find_umc_channel" or so.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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