diff options
| -rw-r--r-- | hw/i386/acpi-build.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 35f17d0..fb87764 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -2550,6 +2550,11 @@ build_amd_iommu(GArray *table_data, BIOSLinker *linker) static void build_rsdp(GArray *rsdp_table, BIOSLinker *linker, unsigned rsdt_tbl_offset) { + /* AcpiRsdpDescriptor describes revision 2 RSDP table and as result we + * allocate extra 16 bytes for pc/q35 RSDP rev1 as well. Keep extra 16 bytes + * wasted to make sure we won't breake migration for machine types older + * than 2.3 due to size mismatch. + */ AcpiRsdpDescriptor *rsdp = acpi_data_push(rsdp_table, sizeof *rsdp); unsigned rsdt_pa_size = sizeof(rsdp->rsdt_physical_address); unsigned rsdt_pa_offset = @@ -2567,7 +2572,7 @@ build_rsdp(GArray *rsdp_table, BIOSLinker *linker, unsigned rsdt_tbl_offset) /* Checksum to be filled by Guest linker */ bios_linker_loader_add_checksum(linker, ACPI_BUILD_RSDP_FILE, - (char *)rsdp - rsdp_table->data, sizeof *rsdp, + (char *)rsdp - rsdp_table->data, 20 /* ACPI rev 1.0 RSDP size */, (char *)&rsdp->checksum - rsdp_table->data); } |