linux-kernel - RE: [BUG] kernel side can NOT trigger memory error with einj

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Date:   Mon, 21 Mar 2022 15:54:17 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Shuai Xue <xueshuai@...ux.alibaba.com>
CC:     "rjw@...ysocki.net" <rjw@...ysocki.net>,
        "lenb@...nel.org" <lenb@...nel.org>,
        "james.morse@....com" <james.morse@....com>,
        "bp@...en8.de" <bp@...en8.de>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "graeme.gregory@...aro.org" <graeme.gregory@...aro.org>,
        "will.deacon@....com" <will.deacon@....com>,
        "myron.stowe@...hat.com" <myron.stowe@...hat.com>,
        "Brown, Len" <len.brown@...el.com>,
        "Huang, Ying" <ying.huang@...el.com>
Subject: RE: [BUG] kernel side can NOT trigger memory error with einj

> As far as I know, APEI only defines five injection instructions, ACPI_EINJ_READ_REGISTER,
> ACPI_EINJ_READ_REGISTER_VALUE, ACPI_EINJ_WRITE_REGISTER, ACPI_EINJ_WRITE_REGISTER_VALUE and
> ACPI_EINJ_NOOP. ACPI_EINJ_TRIGGER_ERROR action should run one of them, I don't see
> any of them will kick the patrol scrubber. For example, trigger with ACPI_EINJ_READ_REGISTER:

Kicking the patrol scrubber is done with a trigger action that writes
to memory controller registers using ACPI_EINJ_WRITE_REGISTER_VALUE.

-Tony