On Wed, 13 Jun 2018 at 21:22, Geoff Levand <geoff@xxxxxxxxxxxxx> wrote:
>
> Adds a new ACPI init routine acpi_fixup_m400_quirks that adds
> a work-around for HPE ProLiant m400 APEI firmware problems.
>
> The work-around disables APEI when CONFIG_ACPI_APEI is set and
> m400 firmware is detected. Without this fixup m400 systems
> experience errors like these on startup:
>
> [Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 2
> [Hardware Error]: event severity: fatal
> [Hardware Error]: Error 0, type: fatal
> [Hardware Error]: section_type: memory error
> [Hardware Error]: error_status: 0x0000000000001300
> [Hardware Error]: error_type: 10, invalid address
> Kernel panic - not syncing: Fatal hardware error!
>
> Signed-off-by: Geoff Levand <geoff@xxxxxxxxxxxxx>
> ---
> Hi,
>
> It seems unlikely there will be any m400 firmware updates to fix
> this problem. APEI support is desired for new ARM64 servers coming
> to market. Distros are now forced to have their own fixes, not
> enable APEI, or let m400 users fend for themselves.
Thanks for working on this. This patch works well on m400 with APEI enabled.
Tested-by: Riku Voipio <riku.voipio@xxxxxxxxxx>
> -Geoff
>
> arch/arm64/kernel/acpi.c | 40 ++++++++++++++++++++++++++++++++++++----
> 1 file changed, 36 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
> index 7b09487ff8fb..3c315c2c7476 100644
> --- a/arch/arm64/kernel/acpi.c
> +++ b/arch/arm64/kernel/acpi.c
> @@ -31,6 +31,8 @@
> #include <asm/cpu_ops.h>
> #include <asm/smp_plat.h>
>
> +#include <acpi/apei.h>
> +
> #ifdef CONFIG_ACPI_APEI
> # include <linux/efi.h>
> # include <asm/pgtable.h>
> @@ -177,6 +179,33 @@ static int __init acpi_fadt_sanity_check(void)
> return ret;
> }
>
> +/*
> + * acpi_fixup_m400_quirks - Work-around for HPE ProLiant m400 APEI firmware
> + * problems.
> + */
> +static void __init acpi_fixup_m400_quirks(void)
> +{
> + acpi_status status;
> + struct acpi_table_header *header;
> +#if !defined(CONFIG_ACPI_APEI)
> + int hest_disable = HEST_DISABLED;
> +#endif
> +
> + if (!IS_ENABLED(CONFIG_ACPI_APEI) || hest_disable != HEST_ENABLED)
> + return;
> +
> + status = acpi_get_table(ACPI_SIG_HEST, 0, &header);
> +
> + if (ACPI_SUCCESS(status) && !strncmp(header->oem_id, "HPE ", 6) &&
> + !strncmp(header->oem_table_id, "ProLiant", 8) &&
> + MIDR_IMPLEMENTOR(read_cpuid_id()) == ARM_CPU_IMP_APM) {
> + hest_disable = HEST_DISABLED;
> + pr_info("Disabled APEI for m400.\n");
> + }
> +
> + acpi_put_table(header);
> +}
> +
> /*
> * acpi_boot_table_init() called from setup_arch(), always.
> * 1. find RSDP and get its address, and then find XSDT
> @@ -232,11 +261,14 @@ void __init acpi_boot_table_init(void)
> if (acpi_disabled) {
> if (earlycon_acpi_spcr_enable)
> early_init_dt_scan_chosen_stdout();
> - } else {
> - acpi_parse_spcr(earlycon_acpi_spcr_enable, true);
> - if (IS_ENABLED(CONFIG_ACPI_BGRT))
> - acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
> + return;
> }
> +
> + acpi_parse_spcr(earlycon_acpi_spcr_enable, true);
> + if (IS_ENABLED(CONFIG_ACPI_BGRT))
> + acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
> +
> + acpi_fixup_m400_quirks();
> }
>
> #ifdef CONFIG_ACPI_APEI
> --
> 2.14.1
>
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