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[PATCH] optionrom/pvh: scan entire RSDP Area
From: |
Joe Richey |
Subject: |
[PATCH] optionrom/pvh: scan entire RSDP Area |
Date: |
Tue, 3 Mar 2020 02:52:47 -0800 |
From: Joe Richey <address@hidden>
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 <address@hidden>
---
pc-bios/optionrom/pvh_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/pc-bios/optionrom/pvh_main.c b/pc-bios/optionrom/pvh_main.c
index a015e1bf22..28e79d7fc4 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
--
2.25.1
- [PATCH] optionrom/pvh: scan entire RSDP Area,
Joe Richey <=