From 4d8d5467cd6e324fb49ae97b9d5dcee3973d9a19 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Wed, 11 Jan 2012 19:46:28 +0000 Subject: pseries: SLOF PCI flag day Currently on the pseries machine the SLOF firmware is used normally, but we bypass it when -kernel is specified. Having these two different boot paths can cause some confusion. In particular at present we need to "probe" the (emulated) PCI bus and produce device tree nodes for the PCI devices in qemu, for the -kernel case. In the SLOF case, it takes the device tree from qemu adds some stuff to it then passes it on to the kernel. It's been decided that a better approach is to always boot through SLOF, even when using -kernel. WIth this approach we can leave PCI probing and device node creation to SLOF in all cases which removes a bunch of code in qemu, and avoids iterating the PCI devices from the machine specific init code which we're not supposed to do. This patch changes qemu to always boot through SLOF, and not to create PCI nodes. Simultaneously it updates the included version of SLOF (submodule and binary image) to one which supports (and requires) the new approach. The new SLOF version also includes a number of unrelated enhancements: support for booting from virtio-pci devices and e1000, greatly improved FCode support and many bugfixes. It also makes SLOF ready to be used even when specifying a kernel on the qemu command line. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: David Gibson Signed-off-by: Alexander Graf --- pc-bios/README | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'pc-bios/README') diff --git a/pc-bios/README b/pc-bios/README index 1cebbbc..5dce355 100644 --- a/pc-bios/README +++ b/pc-bios/README @@ -17,7 +17,7 @@ - SLOF (Slimline Open Firmware) is a free IEEE 1275 Open Firmware implementation for certain IBM POWER hardware. The sources are at https://github.com/dgibson/SLOF, and the image currently in qemu is - built from git tag qemu-slof-20111013. + built from git tag qemu-slof-20120111.1. - sgabios (the Serial Graphics Adapter option ROM) provides a means for legacy x86 software to communicate with an attached serial console as -- cgit v1.1