From: "Gabriel L. Somlo" <somlo@cmu.edu>
To: qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org, drjones@redhat.com,
matt.fleming@intel.com, ehabkost@redhat.com, mst@redhat.com,
zhaoshenglong@huawei.com, leif.lindholm@linaro.org,
ard.biesheuvel@linaro.org, kevin@koconnor.net, kraxel@redhat.com,
pbonzini@redhat.com, imammedo@redhat.com, markmb@redhat.com,
lersek@redhat.com, rth@twiddle.net
Subject: [Qemu-devel] [PATCH v4 5/5] fw_cfg: document ACPI device node information
Date: Sun, 27 Sep 2015 17:29:02 -0400 [thread overview]
Message-ID: <1443389342-2186-6-git-send-email-somlo@cmu.edu> (raw)
In-Reply-To: <1443389342-2186-1-git-send-email-somlo@cmu.edu>
Signed-off-by: Gabriel Somlo <somlo@cmu.edu>
---
docs/specs/fw_cfg.txt | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/docs/specs/fw_cfg.txt b/docs/specs/fw_cfg.txt
index bc95404..4d85701 100644
--- a/docs/specs/fw_cfg.txt
+++ b/docs/specs/fw_cfg.txt
@@ -77,6 +77,15 @@ increasing address order, similar to memcpy().
Selector Register IOport: 0x510
Data Register IOport: 0x511
+== ACPI Interface ==
+
+The fw_cfg device is defined with ACPI ID "QEMU0002". Since we expect
+ACPI tables to be passed into the guest through the fw_cfg device itself,
+the guest-side BIOS can not use ACPI to find fw_cfg. However, once the
+bios is finished setting up ACPI tables and hands control over to the
+guest kernel, the latter can use the fw_cfg ACPI node for a more accurate
+inventory of in-use IOport or MMIO regions.
+
== Firmware Configuration Items ==
=== Signature (Key 0x0000, FW_CFG_SIGNATURE) ===
--
2.4.3
next prev parent reply other threads:[~2015-09-27 21:29 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-27 21:28 [Qemu-devel] [PATCH v4 0/5] add ACPI node for fw_cfg on pc and arm Gabriel L. Somlo
2015-09-27 21:28 ` [Qemu-devel] [PATCH v4 1/5] fw_cfg: expose control register size in fw_cfg.h Gabriel L. Somlo
2015-09-29 10:10 ` Laszlo Ersek
2015-09-27 21:28 ` [Qemu-devel] [PATCH v4 2/5] pc: fw_cfg: move ioport base constant to pc.h Gabriel L. Somlo
2015-09-29 10:20 ` Laszlo Ersek
2015-09-27 21:29 ` [Qemu-devel] [PATCH v4 3/5] acpi: pc: add fw_cfg device node to ssdt Gabriel L. Somlo
2015-09-29 10:33 ` Laszlo Ersek
2015-09-29 16:46 ` Gabriel L. Somlo
2015-09-29 16:55 ` Laszlo Ersek
2015-09-29 17:19 ` Gabriel L. Somlo
2015-09-29 17:28 ` Laszlo Ersek
2015-09-30 0:18 ` Gabriel L. Somlo
2015-09-30 13:01 ` Paolo Bonzini
2015-09-30 14:16 ` Gabriel L. Somlo
2015-09-30 14:27 ` Paolo Bonzini
2015-10-01 7:02 ` Igor Mammedov
2015-10-01 8:27 ` Laszlo Ersek
2015-10-01 11:33 ` Igor Mammedov
2015-10-01 11:52 ` Laszlo Ersek
2015-10-01 13:00 ` Gabriel L. Somlo
2015-10-01 15:59 ` Eric Blake
2015-10-10 4:00 ` Gabriel L. Somlo
2015-10-13 19:10 ` Eduardo Habkost
2015-10-13 21:18 ` Michael S. Tsirkin
2015-10-13 22:43 ` Eduardo Habkost
2015-10-14 5:06 ` Michael S. Tsirkin
2015-10-14 16:32 ` Eduardo Habkost
2015-10-14 8:45 ` Igor Mammedov
2015-10-14 16:47 ` Eduardo Habkost
2015-10-15 13:44 ` Igor Mammedov
2015-09-27 21:29 ` [Qemu-devel] [PATCH v4 4/5] acpi: arm: add fw_cfg device node to dsdt Gabriel L. Somlo
2015-09-29 10:40 ` Laszlo Ersek
2015-09-29 18:26 ` Gabriel L. Somlo
2015-09-29 18:54 ` Laszlo Ersek
2015-09-30 9:59 ` Ard Biesheuvel
2015-09-30 10:21 ` Laszlo Ersek
2015-09-30 11:13 ` Peter Maydell
2015-09-30 12:22 ` Laszlo Ersek
2015-09-30 15:16 ` Gerd Hoffmann
2015-09-30 15:19 ` Peter Maydell
2015-09-30 19:07 ` Gabriel L. Somlo
2015-10-01 12:22 ` Gabriel L. Somlo
2015-10-01 12:25 ` Ard Biesheuvel
2015-10-01 12:35 ` Laszlo Ersek
2015-10-01 12:39 ` Peter Maydell
2015-10-01 12:50 ` Laszlo Ersek
2015-09-30 10:28 ` Laszlo Ersek
2015-09-27 21:29 ` Gabriel L. Somlo [this message]
2015-09-29 10:43 ` [Qemu-devel] [PATCH v4 5/5] fw_cfg: document ACPI device node information Laszlo Ersek
2015-09-29 10:27 ` [Qemu-devel] [PATCH v4 0/5] add ACPI node for fw_cfg on pc and arm Michael S. Tsirkin
2015-09-29 10:45 ` Laszlo Ersek
2015-09-29 13:59 ` Laszlo Ersek
2015-09-29 14:15 ` Michael S. Tsirkin
2015-09-29 19:04 ` Gabriel L. Somlo
2015-09-29 19:21 ` Laszlo Ersek
2015-09-29 18:40 ` Gabriel L. Somlo
2015-09-29 17:30 ` Gabriel L. Somlo
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