WHEA Support in Linux

Can anyone please help me with details regarding the support for WHEA (Windows Hardware Error Architecture) in Linux.
WHEA is supported in ACPI 5.0 specification.

I'm getting the following message in dmesg log from RHEL:
"ERST: Could not register with persistent Store"

Can anyone please let me know the scenarios in which this message comes.

Thanks,
Manish.

Linux since 3.1(in fact, earlier than it in different style) has supported WHEA.

You don't compile pstore support/not loaded it as a module/no NVRAM, UEFI runtime space etc. to support pstore.

Thanks a lot for your quick response.

How can we verify that a particular version of Linux supports WHEA or not? In Windows, OSC method returns supported for the Whea Guid. Is it applicable also for Linux?
Also, In Windows, Error Injection is verifed using WHEA HCT tool and the Errors are logged in Windows Event Viewer.
Is there any such facility/tool available to verify Error Injection (EINJ) stack in Linux?
Also, Is there any thing similar to Event Viewer of Windows in Linux where the WHEA errors are logged?

(I'm getting the following message in dmesg log from RHEL:
"ERST: Could not register with persistent Store"

You don't compile pstore support/not loaded it as a module/no NVRAM, UEFI runtime space etc. to support pstore.)

As far as the above ERST dmesg is concerned, We are allocating a Flash Block for ERST persistent store.
The persistent store will be used for Writing/Reading an Error Record by the OS in case of NMI when fatal error is generated.
In case of fatal error from Windows, it is getting written as well as Read correctly from the persistent store and error is avialable in Event Viewer. Can you please help us to narrow down this issue or in what could be reason for this error in dmesg log.

Regards,
Manish.

Check drivers/acpi/apei/ghes.c, in function ghes_init:
...

        rc = apei_osc_setup();
        if (rc == 0 && osc_sb_apei_support_acked)
                pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit and WHEA _OSC.\n");
        else if (rc == 0 && !osc_sb_apei_support_acked)
                pr_info(GHES_PFX "APEI firmware first mode is enabled by WHEA _OSC.\n");
        else if (rc && osc_sb_apei_support_acked)
                pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit.\n");
        else
                pr_info(GHES_PFX "Failed to enable APEI firmware first mode.\n");

...
search above output from dmesg.

modprob einj and use it. Or you can use mce-test to do this:
git://git.kernel.org/pub/scm/linux/kernel/git/gong.chen/mce-test.git

read it and use it by youself.

mcelog

Yes.

Same as in Linux.

In simple, pstore doesn't work, so the root cause in pstore. You need to debug it. Use kernel command parameter pstore.backend=erst to try again. The prerequisite is your platform supports erst.
(Check dmesg to find "Error Record Serialization Table (ERST) support is initialized.")