From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42664) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zcfpm-000370-RU for qemu-devel@nongnu.org; Thu, 17 Sep 2015 16:31:12 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zcfph-0001em-S3 for qemu-devel@nongnu.org; Thu, 17 Sep 2015 16:31:10 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35649) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zcfph-0001e7-DO for qemu-devel@nongnu.org; Thu, 17 Sep 2015 16:31:05 -0400 Date: Thu, 17 Sep 2015 23:30:59 +0300 From: "Michael S. Tsirkin" Message-ID: <20150917232926-mutt-send-email-mst@redhat.com> References: <1442501794-27112-1-git-send-email-somlo@cmu.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <1442501794-27112-1-git-send-email-somlo@cmu.edu> Content-Transfer-Encoding: quoted-printable Subject: Re: [Qemu-devel] [PATCH v3 0/5] add ACPI node for fw_cfg on pc and arm List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Gabriel L. Somlo" Cc: peter.maydell@linaro.org, drjones@redhat.com, matt.fleming@intel.com, ehabkost@redhat.com, ard.biesheuvel@linaro.org, zhaoshenglong@huawei.com, qemu-devel@nongnu.org, leif.lindholm@linaro.org, kevin@koconnor.net, kraxel@redhat.com, pbonzini@redhat.com, imammedo@redhat.com, markmb@redhat.com, lersek@redhat.com, rth@twiddle.net On Thu, Sep 17, 2015 at 10:56:29AM -0400, Gabriel L. Somlo wrote: > New since v2: >=20 > - pc/i386 node in ssdt only on machine types *newer* than 2.4 > (as suggested by Eduardo) >=20 > I appreciate any further comments and reviews. Hopefully we can make > this palatable for upstream, modulo the lingering concerns about whethe= r > "QEMU0002" is ok to use as the value of _HID, which I'll hopefully get > sorted out with the kernel crew... >=20 > Thanks much, > --Gabriel What I'm still missing is the motivation for the change. Went through old threads, still can't find it. > >New since v1: > > > > - expose control register size (suggested by Marc Mar=ED) > > > > - 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. > >>=20 > >> - Patch 2/3 adds a fw_cfg node to the pc SSDT. > >>=20 > >> - 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, wonde= ring > >> why it would (not) make sense to include that, same as on the PC. >=20 > 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 ssdt > acpi: arm: add fw_cfg device node to dsdt > fw_cfg: document ACPI device node information >=20 > docs/specs/fw_cfg.txt | 9 +++++++++ > hw/arm/virt-acpi-build.c | 13 +++++++++++++ > hw/i386/acpi-build.c | 21 +++++++++++++++++++++ > hw/i386/pc.c | 5 ++--- > hw/i386/pc_piix.c | 1 + > hw/i386/pc_q35.c | 1 + > hw/nvram/fw_cfg.c | 8 +++++--- > include/hw/i386/pc.h | 3 +++ > include/hw/nvram/fw_cfg.h | 3 +++ > 9 files changed, 58 insertions(+), 6 deletions(-) >=20 > --=20 > 2.4.3