linux-kernel - RE: [PATCH v2 1/3] ACPI: Resolve objects on host-directed table loads

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Message-ID: <94F2FBAB4432B54E8AACC7DFDE6C92E3B95FB097@ORSMSX110.amr.corp.intel.com>
Date:   Tue, 18 Jun 2019 20:24:37 +0000
From:   "Moore, Robert" <robert.moore@...el.com>
To:     Nikolaus Voss <nv@...n.de>
CC:     "Rafael J. Wysocki" <rafael@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        "Schmauss, Erik" <erik.schmauss@...el.com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Pavel Machek <pavel@....cz>, Dan Murphy <dmurphy@...com>,
        Thierry Reding <thierry.reding@...il.com>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        "open list:ACPI COMPONENT ARCHITECTURE (ACPICA)" <devel@...ica.org>,
        "linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
        Linux PWM List <linux-pwm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 1/3] ACPI: Resolve objects on host-directed table
 loads

If it is in fact the AcpiLoadTable interface that is incorrect, that of course is different. I'll check that out next.


> -----Original Message-----
> From: Moore, Robert
> Sent: Tuesday, June 18, 2019 1:23 PM
> To: 'Nikolaus Voss' <nv@...n.de>
> Cc: 'Rafael J. Wysocki' <rafael@...nel.org>; 'Rafael J. Wysocki'
> <rjw@...ysocki.net>; 'Len Brown' <lenb@...nel.org>; Schmauss, Erik
> <erik.schmauss@...el.com>; 'Jacek Anaszewski'
> <jacek.anaszewski@...il.com>; 'Pavel Machek' <pavel@....cz>; 'Dan
> Murphy' <dmurphy@...com>; 'Thierry Reding' <thierry.reding@...il.com>;
> 'ACPI Devel Maling List' <linux-acpi@...r.kernel.org>; 'open list:ACPI
> COMPONENT ARCHITECTURE (ACPICA)' <devel@...ica.org>; 'linux-
> leds@...r.kernel.org' <linux-leds@...r.kernel.org>; 'Linux PWM List'
> <linux-pwm@...r.kernel.org>; 'Linux Kernel Mailing List' <linux-
> kernel@...r.kernel.org>
> Subject: RE: [PATCH v2 1/3] ACPI: Resolve objects on host-directed table
> loads
> 
> It looks to me that the package objects are being initialized properly
> already, unless I'm missing something. Please check the examples below
> and in the attached files.
> 
> Attached is a small test case that dynamically loads an SSDT which
> contains a package object which in turn contains references to other
> objects.
> 
> 
> Main DSDT:
>     Method (LD1)
>     {
>         Load (BUF1, HNDL)      // SSDT is in BUF1
>         Store (HNDL, Debug)
>         Return
>     }
> 
> Loaded table:
>     External (DEV1, DeviceObj)
>     Name (PKG1, Package() {
>         1,2, DEV2, DEV1, 4})
>     Device (DEV2) {}
> 
> 
> AcpiExec Output:
> - ev ld1
> Evaluating \LD1
> ACPI: Dynamic OEM Table Load:
> ACPI: SSDT 0x00000000006DEEB8 000051 (v02 Intel  Load     00000001 INTL
> 20190509)
> ACPI Exec: Table Event INSTALL, [SSDT] 006DEEB8
> Table [SSDT: Load    ] (id 06) -    5 Objects with   1 Devices,   0
> Regions,    1 Methods
> ACPI Exec: Table Event LOAD, [SSDT] 006DEEB8 ACPI Debug:  Reference
> [DdbHandle] Table Index 0x3
> 0x7 Outstanding allocations after evaluation of \LD1 Evaluation of \LD1
> returned object 006D2FE8, external buffer length 18
>   [Integer] = 0000000000000000
> 
> - ev pkg1
> Evaluating \PKG1
> Evaluation of \PKG1 returned object 006D2FE8, external buffer length 90
>   [Package] Contains 5 Elements:
>     [Integer] = 0000000000000001
>     [Integer] = 0000000000000002
>     [Object Reference] = 006DDF88 <Node>            Name DEV2 Device
>     [Object Reference] = 006DD608 <Node>            Name DEV1 Device
>     [Integer] = 0000000000000004