linux-kernel - Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size() and early_acpi_os_unmap

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Message-ID: <CAJZ5v0jgdctHEEOaAUBNZZPb=ni_DLdkJtmiDkvVP4WQUYr3rA@mail.gmail.com>
Date:   Sun, 8 Jan 2017 01:52:50 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Lv Zheng <lv.zheng@...el.com>,
        Bob Moore <robert.moore@...el.com>,
        Jörg Rödel <joro@...tes.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Linux ACPI <linux-acpi@...r.kernel.org>
Subject: Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size()
 and early_acpi_os_unmap_memory() from Linux kernel

On Sun, Jan 8, 2017 at 1:37 AM, Borislav Petkov <bp@...en8.de> wrote:
> On Sun, Jan 08, 2017 at 01:22:55AM +0100, Rafael J. Wysocki wrote:
>> Is an IVRS table actually present on this machine?
>
> Like this?
>
> [    0.000000] ACPI: IVRS 0x000000009CFD6000 0000D0 (v02 AMD    AGESA    00000001 AMD  00000000)

Yup.

So we get the table, but apparently we crash when we attempt to put it.

Let's try to check the obvious just to rule it out (see attached), but
honestly I'm not sure what's going on in there.

Thanks,
Rafael

View attachment "acpi-table-put-debug.patch" of type "text/x-patch" (790 bytes)