The use of seabios defconfig kills boot performance of Windows guests
because the default is for the int13 handler to use PIO when accessing
the emulated IDE device.
By instead using a canned configuration with the ATA settings overridden
to enable DMA access (and also wider PIO) boot performance is markedly
improved without the need to use a different (and possibly not supported)
device model.
This patch adds the canned configuration into tools/firmware and modifies
the Makefile rule to copy it into place.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Only lightly tested with a Linux HVM guest PXE boot.
Accept the defaults for the config options. Many of them are not
relevant to Xen but this matches what others (at least the Debian
SeaBIOS packages and the binary shipped by Qemu) are doing. The
Debian Xen packages are built against Debian's SeaBIOS package so
there is value in being similar.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>
These have broken the build and it seems to be difficult to fix. So
we will revert the whole lot for now, and await corrected patch(es).
Revert "fix the build when CONFIG_QEMU is specified by the user"
Revert "tools: fix permissions of git-checkout.sh"
Revert "scripts/git-checkout.sh: Is not bash specific. Invoke with /bin/sh."
Revert "Clone and build Seabios by default"
Revert "Clone and build upstream Qemu by default"
Revert "Rename ioemu-dir as qemu-xen-traditional-dir"
Revert "Move the ioemu-dir-find shell script to an external file"
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Paul Durrant
Ian Campbell
Ian Jackson