From b7d1f77adaab790d20232df261d4e2ff6a77f556 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Mon, 21 Jul 2014 13:02:04 +1000 Subject: spapr: Locate RTAS and device-tree based on real RMA We currently calculate the final RTAS and FDT location based on the early estimate of the RMA size, cropped to 256M on KVM since we only know the real RMA size at reset time which happens much later in the boot process. This means the FDT and RTAS end up right below 256M while they could be much higher, using precious RMA space and limiting what the OS bootloader can put there which has proved to be a problem with some OSes (such as when using very large initrd's) Fortunately, we do the actual copy of the device-tree into guest memory much later, during reset, late enough to be able to do it using the final RMA value, we just need to move the calculation to the right place. However, RTAS is still loaded too early, so we change the code to load the tiny blob into qemu memory early on, and then copy it into guest memory at reset time. It's small enough that the memory usage doesn't matter. Signed-off-by: Benjamin Herrenschmidt [aik: fixed errors from checkpatch.pl, defined RTAS_MAX_ADDR] Signed-off-by: Alexey Kardashevskiy [agraf: fix compilation on 32bit hosts] Signed-off-by: Alexander Graf --- include/hw/ppc/spapr.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/hw') diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 7fff9794f7..36e8e51435 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -24,7 +24,8 @@ typedef struct sPAPREnvironment { hwaddr rma_size; int vrma_adjust; hwaddr fdt_addr, rtas_addr; - long rtas_size; + ssize_t rtas_size; + void *rtas_blob; void *fdt_skel; target_ulong entry_point; uint64_t rtc_offset; -- cgit v1.2.1