[PATCH] align vga rom to 4k boundary.

Glauber Costa
2009-04-07T02:24:15Z

Instead of aligning to 2k boundary, as required by the bios,
align to 4k boundary, as required by kvm memory functions. Without
this patch, starting kvm with -vga std option fails with:

create_userspace_phys_mem: Invalid argument
kvm_cpu_register_physical_memory: failed

as described by: https://bugzilla.redhat.com/show_bug.cgi?id=494376

It does not fail with cirrus vga, because it is naturally aligned.
This problem does not seem to affect upstream qemu.

Signed-off-by: Glauber Costa <glommer@redhat.com>
---
qemu/hw/pc.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/qemu/hw/pc.c b/qemu/hw/pc.c
index cc84772..680d4a2 100644
--- a/qemu/hw/pc.c
+++ b/qemu/hw/pc.c
@@ -919,7 +919,7 @@ vga_bios_error:
exit(1);
}
/* Round up vga bios size to the next 2k boundary */
- vga_bios_size = (vga_bios_size + 2047) & ~2047;
+ vga_bios_size = (vga_bios_size + 4095) & ~4095;
option_rom_start = 0xc0000 + vga_bios_size;

/* setup basic memory access */
--
1.5.6.6