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authorJoe Richey <joerichey@google.com>2020-03-03 02:52:47 -0800
committerPaolo Bonzini <pbonzini@redhat.com>2020-03-16 22:07:42 +0100
commit770275ed0c0ab05677472efcf184b1a02ab14d07 (patch)
tree69a6e8b7faa06fd3e6f62c76a1d54a3f86922902 /pc-bios
parent4ce1e15fbc7266a108a7c77a3962644b3935346e (diff)
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optionrom/pvh: scan entire RSDP Area
Right now the PVH option rom scans for the RSDP from 0xE0000 to 0xE1FFF. This is probobly a typo, it should scan from 0xE0000 to 0xFFFFF. This is actually an issue on some QEMU versions/machines. For example, when I run QEMU the RSDP is placed at 0xf5ad0 which will not be picked up by the current implementation. This bug still allows a Linux guest to boot (in most configurations) as the kernel will just scan for the RSDP if one isn't provided. Signed-off-by: Joe Richey <joerichey@google.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Fixes: 2785dc7b17 ("optionrom: add new PVH option rom") Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'pc-bios')
-rw-r--r--pc-bios/optionrom/pvh_main.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/pc-bios/optionrom/pvh_main.c b/pc-bios/optionrom/pvh_main.c
index a015e1b..28e79d7 100644
--- a/pc-bios/optionrom/pvh_main.c
+++ b/pc-bios/optionrom/pvh_main.c
@@ -29,7 +29,7 @@ asm (".code32"); /* this code will be executed in protected mode */
#define RSDP_SIGNATURE 0x2052545020445352LL /* "RSD PTR " */
#define RSDP_AREA_ADDR 0x000E0000
-#define RSDP_AREA_SIZE 2048
+#define RSDP_AREA_SIZE 0x00020000
#define EBDA_BASE_ADDR 0x0000040E
#define EBDA_SIZE 1024