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 <[email protected]> Reviewed-by: Stefano Garzarella <[email protected]> Fixes: 2785dc7 ("optionrom: add new PVH option rom") Signed-off-by: Paolo Bonzini <[email protected]>
raininggibs · Mar 16, 2020 · 770275e · 770275e
1 parent 4ce1e15
commit 770275e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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