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hw: arm: Convert the RSDP build to the buid_append_foo() API

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Instead of filling a mapped and packed C structure field in random order
and being careful about endianness and sizes, build_rsdp() now uses
build_append_int_noprefix() to compose RSDP table.

This makes reviewing and maintaining code easier as this is almost
matching 1:1 the ACPI spec itself.

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 11:48:35 +01:00 committed by Michael S. Tsirkin
parent 5c5fce1ab5
commit 77321eaf15
1 changed files with 23 additions and 19 deletions
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42
hw/arm/virt-acpi-build.c
View file

@ -368,35 +368,39 @@ static void acpi_dsdt_add_power_button(Aml *scope)
/* RSDP */
static void
build_rsdp(GArray *rsdp_table, BIOSLinker *linker, AcpiRsdpData *rsdp_data)
build_rsdp(GArray *tbl, BIOSLinker *linker, AcpiRsdpData *rsdp_data)
{
AcpiRsdpDescriptor *rsdp = acpi_data_push(rsdp_table, sizeof *rsdp);
unsigned xsdt_pa_size = sizeof(rsdp->xsdt_physical_address);
unsigned xsdt_pa_offset =
(char *)&rsdp->xsdt_physical_address - rsdp_table->data;
int tbl_off = tbl->len; /* Table offset in the RSDP file */
bios_linker_loader_alloc(linker, ACPI_BUILD_RSDP_FILE, rsdp_table, 16,
bios_linker_loader_alloc(linker, ACPI_BUILD_RSDP_FILE, tbl, 16,
true /* fseg memory */);
memcpy(&rsdp->signature, "RSD PTR ", sizeof(rsdp->signature));
memcpy(rsdp->oem_id, rsdp_data->oem_id, sizeof(rsdp->oem_id));
rsdp->length = cpu_to_le32(sizeof(*rsdp));
rsdp->revision = rsdp_data->revision;
g_array_append_vals(tbl, "RSD PTR ", 8); /* Signature */
build_append_int_noprefix(tbl, 0, 1); /* Checksum */
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 */
build_append_int_noprefix(tbl, 36, 4); /* Length */
/* Address to be filled by Guest linker */
bios_linker_loader_add_pointer(linker,
ACPI_BUILD_RSDP_FILE, xsdt_pa_offset, xsdt_pa_size,
ACPI_BUILD_TABLE_FILE, *rsdp_data->xsdt_tbl_offset);
/* XSDT address to be filled by guest linker */
build_append_int_noprefix(tbl, 0, 8); /* XsdtAddress */
bios_linker_loader_add_pointer(linker, ACPI_BUILD_RSDP_FILE,
tbl_off + 24, 8,
ACPI_BUILD_TABLE_FILE,
*rsdp_data->xsdt_tbl_offset);
/* Checksum to be filled by Guest linker */
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,
(char *)rsdp - rsdp_table->data, 20 /* ACPI rev 1.0 RSDP size */,
(char *)&rsdp->checksum - rsdp_table->data);
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,
(char *)rsdp - rsdp_table->data, 36 /* ACPI rev 2.0 RSDP size */,
(char *)&rsdp->extended_checksum - rsdp_table->data);
tbl_off, 36, /* ACPI rev 2.0 RSDP size */
32);
}
static void