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hw: arm: Support both legacy and current RSDP build 

We add the ability to build legacy or current RSDP tables, based on the
AcpiRsdpData revision field passed to build_rsdp().
Although arm/virt only uses RSDP v2, adding that capability to
build_rsdp will allow us to share the RSDP build code between ARM and x86.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Samuel Ortiz 2018-12-17 11:48:36 +01:00 committed by Michael S. Tsirkin
parent 77321eaf15
commit f10f38b876
1 changed files with 33 additions and 5 deletions
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38
hw/arm/virt-acpi-build.c
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@ -372,6 +372,20 @@ build_rsdp(GArray *tbl, BIOSLinker *linker, AcpiRsdpData *rsdp_data)
{
int tbl_off = tbl->len; /* Table offset in the RSDP file */
switch (rsdp_data->revision) {
case 0:
/* With ACPI 1.0, we must have an RSDT pointer */
g_assert(rsdp_data->rsdt_tbl_offset);
break;
case 2:
/* With ACPI 2.0+, we must have an XSDT pointer */
g_assert(rsdp_data->xsdt_tbl_offset);
break;
default:
/* Only revisions 0 (ACPI 1.0) and 2 (ACPI 2.0+) are valid for RSDP */
g_assert_not_reached();
}
bios_linker_loader_alloc(linker, ACPI_BUILD_RSDP_FILE, tbl, 16,
true /* fseg memory */);
@ -380,10 +394,29 @@ build_rsdp(GArray *tbl, BIOSLinker *linker, AcpiRsdpData *rsdp_data)
g_array_append_vals(tbl, rsdp_data->oem_id, 6); /* OEMID */
build_append_int_noprefix(tbl, rsdp_data->revision, 1); /* Revision */
build_append_int_noprefix(tbl, 0, 4); /* RsdtAddress */
if (rsdp_data->rsdt_tbl_offset) {
/* RSDT address to be filled by guest linker */
bios_linker_loader_add_pointer(linker, ACPI_BUILD_RSDP_FILE,
tbl_off + 16, 4,
ACPI_BUILD_TABLE_FILE,
*rsdp_data->rsdt_tbl_offset);
}
/* Checksum to be filled by guest linker */
bios_linker_loader_add_checksum(linker, ACPI_BUILD_RSDP_FILE,
tbl_off, 20, /* ACPI rev 1.0 RSDP size */
8);
if (rsdp_data->revision == 0) {
/* ACPI 1.0 RSDP, we're done */
return;
}
build_append_int_noprefix(tbl, 36, 4); /* Length */
/* XSDT address to be filled by guest linker */
build_append_int_noprefix(tbl, 0, 8); /* XsdtAddress */
/* We already validated our xsdt pointer */
bios_linker_loader_add_pointer(linker, ACPI_BUILD_RSDP_FILE,
tbl_off + 24, 8,
ACPI_BUILD_TABLE_FILE,
@ -392,11 +425,6 @@ build_rsdp(GArray *tbl, BIOSLinker *linker, AcpiRsdpData *rsdp_data)
build_append_int_noprefix(tbl, 0, 1); /* Extended Checksum */
build_append_int_noprefix(tbl, 0, 3); /* Reserved */
/* Checksum to be filled by guest linker */
bios_linker_loader_add_checksum(linker, ACPI_BUILD_RSDP_FILE,
tbl_off, 20, /* ACPI rev 1.0 RSDP size */
8);
/* Extended checksum to be filled by Guest linker */
bios_linker_loader_add_checksum(linker, ACPI_BUILD_RSDP_FILE,
tbl_off, 36, /* ACPI rev 2.0 RSDP size */