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SubjectRe: [PATCH V15 03/11] cper: add timestamp print to CPER status printing
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On 4/21/2017 6:21 AM, Borislav Petkov wrote:
> On Tue, Apr 18, 2017 at 05:05:15PM -0600, Tyler Baicar wrote:
>> The ACPI 6.1 spec added a timestamp to the HEST generic data
> HEST?
>
> I see the timestamp in
>
> Table 18-343 Generic Error Data Entry
>
> where those things are "One or more Generic Error Data Entry structures
> may be recorded in the Generic Error Data Entries field of the Generic
> Error Status Block structure."
>
> And those are part of the "18.3.2.7 Generic Hardware Error Source",
> i.e., GHES. So why do you say "HEST" above?
Ah yes, this should be GHES no HEST. There are too many acronyms
involved here :)
>
>> structure. Print the timestamp out when printing out the error
>> status information.
>>
>> Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
>> CC: Jonathan (Zhixiong) Zhang <zjzhang@codeaurora.org>
>> Reviewed-by: James Morse <james.morse@arm.com>
>> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> Remove those Reviewed-by:s
>
>> ---
>> drivers/firmware/efi/cper.c | 28 ++++++++++++++++++++++++++++
>> 1 file changed, 28 insertions(+)
>>
>> diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
>> index 8328a6f..46585f9 100644
>> --- a/drivers/firmware/efi/cper.c
>> +++ b/drivers/firmware/efi/cper.c
>> @@ -32,6 +32,8 @@
>> #include <linux/acpi.h>
>> #include <linux/pci.h>
>> #include <linux/aer.h>
>> +#include <linux/printk.h>
>> +#include <linux/bcd.h>
>> #include <acpi/ghes.h>
>>
>> #define INDENT_SP " "
>> @@ -387,6 +389,29 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
>> pfx, pcie->bridge.secondary_status, pcie->bridge.control);
>> }
>>
>> +static void cper_estatus_timestamp(const char *pfx,
> cper_print_tstamp()
>
>> + struct acpi_hest_generic_data_v300 *gdata)
>> +{
>> + __u8 hour, min, sec, day, mon, year, century, *timestamp;
>> +
>> + if (gdata->validation_bits & ACPI_HEST_GEN_VALID_TIMESTAMP) {
>> + timestamp = (__u8 *)&(gdata->time_stamp);
>> + sec = bcd2bin(timestamp[0]);
>> + min = bcd2bin(timestamp[1]);
>> + hour = bcd2bin(timestamp[2]);
>> + day = bcd2bin(timestamp[4]);
>> + mon = bcd2bin(timestamp[5]);
>> + year = bcd2bin(timestamp[6]);
>> + century = bcd2bin(timestamp[7]);
>> +
>> + if (*(timestamp + 3) & 0x1)
>> + printk("%stimestamp is precise\n", pfx);
>> +
>> + printk("%stime: %02d%02d-%02d-%02d %02d:%02d:%02d\n", pfx,
>> + century, year, mon, day, hour, min, sec);
> Yeah, about the precise tstamp, you can do something like this:
>
> ---
> diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
> index 46585f92b741..a649884e2264 100644
> --- a/drivers/firmware/efi/cper.c
> +++ b/drivers/firmware/efi/cper.c
> @@ -404,10 +404,8 @@ static void cper_estatus_timestamp(const char *pfx,
> year = bcd2bin(timestamp[6]);
> century = bcd2bin(timestamp[7]);
>
> - if (*(timestamp + 3) & 0x1)
> - printk("%stimestamp is precise\n", pfx);
> -
> - printk("%stime: %02d%02d-%02d-%02d %02d:%02d:%02d\n", pfx,
> + printk("%s%ststamp: %02d%02d-%02d-%02d %02d:%02d:%02d\n", pfx,
> + (timestamp[3] & 0x1 ? "precise " : ""),
> century, year, mon, day, hour, min, sec);
> }
> }
This is basically what I already had in v14...you asked to move it into
a different if-statement? https://lkml.org/lkml/2017/4/12/397

Thanks,
Tyler

--
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.

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