move 64bit pci window to end of address space
When the size of the physical address space is known (PhysBits is not
zero) move the 64bit pci io window to the end of the address space.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
diff --git a/src/fw/pciinit.c b/src/fw/pciinit.c
index badf13d..0fcd2be 100644
--- a/src/fw/pciinit.c
+++ b/src/fw/pciinit.c
@@ -1128,6 +1128,14 @@
r64_mem.base = le64_to_cpu(romfile_loadint("etc/reserved-memory-end", 0));
if (r64_mem.base < 0x100000000LL + RamSizeOver4G)
r64_mem.base = 0x100000000LL + RamSizeOver4G;
+ if (CPUPhysBits) {
+ u64 top = 1LL << CPUPhysBits;
+ u64 size = (ALIGN(sum_mem, (1LL<<30)) +
+ ALIGN(sum_pref, (1LL<<30)));
+ if (r64_mem.base < top - size) {
+ r64_mem.base = top - size;
+ }
+ }
r64_mem.base = ALIGN(r64_mem.base, align_mem);
r64_mem.base = ALIGN(r64_mem.base, (1LL<<30)); // 1G hugepage
r64_pref.base = r64_mem.base + sum_mem;