The e801 memory sizes in the multiboot structures hard-code the available
low memory to 640. However, the value should not include the size of the
EBDA. Fill the value in the option ROM, getting the size of low memory
from the BIOS.
Cc: Alexander Graf <ag...@suse.de>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
pc-bios/multiboot.bin | Bin 1024 -> 1024 bytes
pc-bios/optionrom/multiboot.S | 7 +++++++
2 files changed, 7 insertions(+)
diff --git a/pc-bios/multiboot.bin b/pc-bios/multiboot.bin
index
f74a6e142fddc054d7f40ab346a108532afac40f..7b3c1745a430ea5e0e15b9aa817d1cbbaa40db14
100644
GIT binary patch
delta 81
zcmZqRXyBNj#q7o8KT+38L4+xd@o;KdryK*rZVrajPB|8aZaEhwAcKt|ty|7*VtW(k
kS)sHUDQSyY7$$Qv{%2ueV91@!$z;eVv)P(y2P2~%0BkrF9smFU
delta 72
zcmZqRXyBNj#capqJW<z5frBZH@o;KdryK*rZVrajPB|8aZaE7kAcKt|ty|7&VtdnM
bA;$lVDU(H+3>gJByEE-zoLs=f!*~_|qXQE}
diff --git a/pc-bios/optionrom/multiboot.S b/pc-bios/optionrom/multiboot.S
index f08222a..003bcfb 100644
--- a/pc-bios/optionrom/multiboot.S
+++ b/pc-bios/optionrom/multiboot.S
@@ -75,6 +75,13 @@ run_multiboot:
shr $4, %eax
mov %ax, %fs
+ /* Account for the EBDA in the multiboot structure's e801
+ * map.
+ */
+ int $0x12
+ cwtl
+ movl %eax, %fs:4
+
/* ES = mmap_addr */
mov %fs:48, %eax
shr $4, %eax
--
1.8.0
