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[Qemu-devel] [PULL 2/7] fw_cfg: document fw_cfg_modify_iXX() update func
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PULL 2/7] fw_cfg: document fw_cfg_modify_iXX() update functions |
Date: |
Mon, 19 Oct 2015 11:17:59 +0200 |
From: "Gabriel L. Somlo" <address@hidden>
Document the behavior of fw_cfg_modify_iXX() for leak-less updating
of integer-type blobs.
Currently only fw_cfg_modify_i16() is coded, but 32- and 64-bit versions
may be added later if necessary..
Signed-off-by: Gabriel Somlo <address@hidden>
Reviewed-by: Laszlo Ersek <address@hidden>
Signed-off-by: Gerd Hoffmann <address@hidden>
---
docs/specs/fw_cfg.txt | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/docs/specs/fw_cfg.txt b/docs/specs/fw_cfg.txt
index c0e76aa..d5dee4b 100644
--- a/docs/specs/fw_cfg.txt
+++ b/docs/specs/fw_cfg.txt
@@ -159,6 +159,17 @@ will convert a 16-, 32-, or 64-bit integer to
little-endian, then add
a dynamically allocated copy of the appropriately sized item to fw_cfg
under the given selector key value.
+== fw_cfg_modify_iXX() ==
+
+Modify the value of an XX-bit item (where XX may be 16, 32, or 64).
+Similarly to the corresponding fw_cfg_add_iXX() function set, convert
+a 16-, 32-, or 64-bit integer to little endian, create a dynamically
+allocated copy of the required size, and replace the existing item at
+the given selector key value with the newly allocated one. The previous
+item, assumed to have been allocated during an earlier call to
+fw_cfg_add_iXX() or fw_cfg_modify_iXX() (of the same width XX), is freed
+before the function returns.
+
== fw_cfg_add_file() ==
Given a filename (i.e., fw_cfg item name), starting pointer, and size,
--
1.8.3.1
- [Qemu-devel] [PULL 0/7] fw_cfg: add dma interface, add strings via cmdline., Gerd Hoffmann, 2015/10/19
- [Qemu-devel] [PULL 6/7] Enable fw_cfg DMA interface for x86, Gerd Hoffmann, 2015/10/19
- [Qemu-devel] [PULL 5/7] Enable fw_cfg DMA interface for ARM, Gerd Hoffmann, 2015/10/19
- [Qemu-devel] [PULL 3/7] fw_cfg DMA interface documentation, Gerd Hoffmann, 2015/10/19
- [Qemu-devel] [PULL 1/7] fw_cfg: insert string blobs via qemu cmdline, Gerd Hoffmann, 2015/10/19
- [Qemu-devel] [PULL 4/7] Implement fw_cfg DMA interface, Gerd Hoffmann, 2015/10/19
- [Qemu-devel] [PULL 7/7] fw_cfg: Define a static signature to be returned on DMA port reads, Gerd Hoffmann, 2015/10/19
- [Qemu-devel] [PULL 2/7] fw_cfg: document fw_cfg_modify_iXX() update functions,
Gerd Hoffmann <=
- Re: [Qemu-devel] [PULL 0/7] fw_cfg: add dma interface, add strings via cmdline., Peter Maydell, 2015/10/19
- Re: [Qemu-devel] [PULL 0/7] fw_cfg: add dma interface, add strings via cmdline., Kevin O'Connor, 2015/10/19
- Re: [Qemu-devel] [PULL 0/7] fw_cfg: add dma interface, add strings via cmdline., Peter Maydell, 2015/10/19
- Re: [Qemu-devel] [PULL 0/7] fw_cfg: add dma interface, add strings via cmdline., Kevin O'Connor, 2015/10/19
- Re: [Qemu-devel] [PULL 0/7] fw_cfg: add dma interface, add strings via cmdline., Marc MarĂ, 2015/10/19
- Re: [Qemu-devel] [PULL 0/7] fw_cfg: add dma interface, add strings via cmdline., Gerd Hoffmann, 2015/10/19
- Re: [Qemu-devel] [PULL 0/7] fw_cfg: add dma interface, add strings via cmdline., Gerd Hoffmann, 2015/10/19
- Re: [Qemu-devel] [PULL 0/7] fw_cfg: add dma interface, add strings via cmdline., Peter Maydell, 2015/10/19
Re: [Qemu-devel] [PULL 0/7] fw_cfg: add dma interface, add strings via cmdline., Laszlo Ersek, 2015/10/19