From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 9 Sep 2022 08:16:31 +0000 (+0200)
Subject: move 64bit pci window to end of address space
X-Git-Tag: rel-1.16.3~4
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=bcfed7e270776ab5595cafc6f1794bea0cae1c6c;p=seabios.git

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 @@ static void pci_bios_map_devices(struct pci_bus *busses)
         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;