From 803934e62dc6394df92ef08fc8df9e49c0c834e7 Mon Sep 17 00:00:00 2001
From: Glauber Costa <glommer@redhat.com>
Date: Wed, 24 Jun 2009 14:28:30 +0100
Subject: [PATCH 12/18] align vga rom to 4k boundary.
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/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>
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
---
hw/pc.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/hw/pc.c b/hw/pc.c
index 413da6f..fb6edf4 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -925,7 +925,7 @@ 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 */
--
1.6.2.2