From: "Gabriel L. Somlo" <somlo@cmu.edu>
To: qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org, ehabkost@redhat.com, mst@redhat.com,
matt@codeblueprint.co.uk, stefanha@gmail.com,
ard.biesheuvel@linaro.org, leif.lindholm@linaro.org,
luto@amacapital.net, qemu-arm@nongnu.org, kraxel@redhat.com,
pbonzini@redhat.com, imammedo@redhat.com, lersek@redhat.com,
rth@twiddle.net
Subject: [Qemu-devel] [PATCH v8 0/5] add ACPI node for fw_cfg on pc and arm
Date: Thu, 11 Feb 2016 17:06:00 -0500 [thread overview]
Message-ID: <1455228365-13666-1-git-send-email-somlo@cmu.edu> (raw)
Generate an ACPI DSDT node for fw_cfg on pc and arm guests.
New since v7:
- edited commit blurb on 3/5 to match updated content, i.e. that
the ACPI node is now inserted into the DSDT (no longer the SSDT).
(Thanks to Igor Mammedov for catching that!)
Thanks,
--Gabriel
>New since v6:
> - rebased to fit on top of fb306ff and f264d36, which moved things
> around in pc's acpi-build.c (only patch 3/5 affected);
> - kernel-side fw_cfg sysfs driver accepted into upstream linux
>
>>New since v5:
>>
>> - rebased on top of latest QEMU git master
>>
>>>New since v4:
>>>
>>> - rebased on top of Marc's DMA series
>>> - drop machine compat dependency for insertion into x86/ssdt
>>> (patch 3/5), following agreement between Igor and Eduardo
>>> - [mm]io register range now covers DMA register as well, if
>>> available.
>>> - s/bios/firmware in doc file updates
>>>
>>>>New since v3:
>>>>
>>>> - rebased to work on top of 87e896ab (introducing pc-*-25 classes),
>>>> inserting fw_cfg acpi node only for machines >= 2.5.
>>>>
>>>> - reintroduce _STA with value 0x0B (bit 2 for u/i visibility turned
>>>> off to avoid Windows complaining -- thanks Igor for catching that!)
>>>>
>>>>If there's any other feedback besides questions regarding the
>>>>appropriateness of "QEMU0002" as the value of _HID, please don't hesitate!
>>>>
>>>>>New since v2:
>>>>>
>>>>> - pc/i386 node in ssdt only on machine types *newer* than 2.4
>>>>> (as suggested by Eduardo)
>>>>>
>>>>>I appreciate any further comments and reviews. Hopefully we can make
>>>>>this palatable for upstream, modulo the lingering concerns about whether
>>>>>"QEMU0002" is ok to use as the value of _HID, which I'll hopefully get
>>>>>sorted out with the kernel crew...
>>>>>
>>>>>>New since v1:
>>>>>>
>>>>>> - expose control register size (suggested by Marc Marí)
>>>>>>
>>>>>> - leaving out _UID and _STA fields (thanks Shannon & Igor)
>>>>>>
>>>>>> - using "QEMU0002" as the value of _HID (thanks Michael)
>>>>>>
>>>>>> - added documentation blurb to docs/specs/fw_cfg.txt
>>>>>> (mainly to record usage of the "QEMU0002" string with fw_cfg).
>>>>>>
>>>>>>> This series adds a fw_cfg device node to the SSDT (on pc), or to the
>>>>>>> DSDT (on arm).
>>>>>>>
>>>>>>> - Patch 1/3 moves (and renames) the BIOS_CFG_IOPORT (0x510)
>>>>>>> define from pc.c to pc.h, so that it could be used from
>>>>>>> acpi-build.c in patch 2/3.
>>>>>>>
>>>>>>> - Patch 2/3 adds a fw_cfg node to the pc SSDT.
>>>>>>>
>>>>>>> - Patch 3/3 adds a fw_cfg node to the arm DSDT.
>>>>>>>
>>>>>>> I made up some names - "FWCF" for the node name, and "FWCF0001"
>>>>>>> for _HID; no idea whether that's appropriate, or how else I should
>>>>>>> figure out what to use instead...
>>>>>>>
>>>>>>> Also, using scope "\\_SB", based on where fw_cfg shows up in the
>>>>>>> output of "info qtree". Again, if that's wrong, please point me in
>>>>>>> the right direction.
>>>>>>>
>>>>>>> Re. 3/3 (also mentioned after the commit blurb in the patch itself),
>>>>>>> I noticed none of the other DSDT entries contain a _STA field, wondering
>>>>>>> why it would (not) make sense to include that, same as on the PC.
Gabriel L. Somlo (5):
fw_cfg: expose control register size in fw_cfg.h
pc: fw_cfg: move ioport base constant to pc.h
acpi: pc: add fw_cfg device node to dsdt
acpi: arm: add fw_cfg device node to dsdt
fw_cfg: document ACPI device node information
docs/specs/fw_cfg.txt | 9 +++++++++
hw/arm/virt-acpi-build.c | 15 +++++++++++++++
hw/i386/acpi-build.c | 29 +++++++++++++++++++++++++++++
hw/i386/pc.c | 5 ++---
hw/nvram/fw_cfg.c | 4 +++-
include/hw/i386/pc.h | 2 ++
include/hw/nvram/fw_cfg.h | 3 +++
7 files changed, 63 insertions(+), 4 deletions(-)
--
2.4.3
next reply other threads:[~2016-02-11 22:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-11 22:06 Gabriel L. Somlo [this message]
2016-02-11 22:06 ` [Qemu-devel] [PATCH v8 1/5] fw_cfg: expose control register size in fw_cfg.h Gabriel L. Somlo
2016-02-11 22:06 ` [Qemu-devel] [PATCH v8 2/5] pc: fw_cfg: move ioport base constant to pc.h Gabriel L. Somlo
2016-02-11 22:06 ` [Qemu-devel] [PATCH v8 3/5] acpi: pc: add fw_cfg device node to dsdt Gabriel L. Somlo
2016-02-19 13:49 ` Igor Mammedov
2016-02-19 16:59 ` Gabriel L. Somlo
2016-02-11 22:06 ` [Qemu-devel] [PATCH v8 4/5] acpi: arm: " Gabriel L. Somlo
2016-02-11 22:06 ` [Qemu-devel] [PATCH v8 5/5] fw_cfg: document ACPI device node information Gabriel L. Somlo
2016-02-16 23:49 ` [Qemu-devel] [PATCH v8 0/5] add ACPI node for fw_cfg on pc and arm Gabriel L. Somlo
2016-02-19 7:08 ` Gerd Hoffmann
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