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tests/bios-tables-test: Fix endianess problems when passing data to iasl

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The bios-tables-test was writing out files that we pass to iasl in
with the wrong endianness in the header when running on a big endian
host. So instead of storing mixed endian information in our structures,
let's keep everything in little endian and byte-swap it only when we
need a value in the code.

Reported-by: Daniel P. Berrange <berrange@redhat.com>
Buglink: https://bugs.launchpad.net/qemu/+bug/1724570
Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Tested-by: "Daniel P. Berrange" <berrange@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Thomas Huth 2017-11-16 13:17:02 +01:00 • committed by Michael S. Tsirkin
parent f865da7c36
commit 3831c07b89
3 changed files with 39 additions and 52 deletions
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22
tests/vmgenid-test.c
View file

@ -38,7 +38,7 @@ static uint32_t acpi_find_vgia(void)
uint32_t rsdp_offset;
uint32_t guid_offset = 0;
AcpiRsdpDescriptor rsdp_table;
uint32_t rsdt;
uint32_t rsdt, rsdt_table_length;
AcpiRsdtDescriptorRev1 rsdt_table;
size_t tables_nr;
uint32_t *tables;
@ -56,14 +56,15 @@ static uint32_t acpi_find_vgia(void)
acpi_parse_rsdp_table(rsdp_offset, &rsdp_table);
rsdt = rsdp_table.rsdt_physical_address;
rsdt = le32_to_cpu(rsdp_table.rsdt_physical_address);
/* read the header */
ACPI_READ_TABLE_HEADER(&rsdt_table, rsdt);
ACPI_ASSERT_CMP(rsdt_table.signature, "RSDT");
rsdt_table_length = le32_to_cpu(rsdt_table.length);
/* compute the table entries in rsdt */
g_assert_cmpint(rsdt_table.length, >, sizeof(AcpiRsdtDescriptorRev1));
tables_nr = (rsdt_table.length - sizeof(AcpiRsdtDescriptorRev1)) /
g_assert_cmpint(rsdt_table_length, >, sizeof(AcpiRsdtDescriptorRev1));
tables_nr = (rsdt_table_length - sizeof(AcpiRsdtDescriptorRev1)) /
sizeof(uint32_t);
/* get the addresses of the tables pointed by rsdt */
@ -71,23 +72,24 @@ static uint32_t acpi_find_vgia(void)
ACPI_READ_ARRAY_PTR(tables, tables_nr, rsdt);
for (i = 0; i < tables_nr; i++) {
ACPI_READ_TABLE_HEADER(&ssdt_table, tables[i]);
uint32_t addr = le32_to_cpu(tables[i]);
ACPI_READ_TABLE_HEADER(&ssdt_table, addr);
if (!strncmp((char *)ssdt_table.oem_table_id, "VMGENID", 7)) {
/* the first entry in the table should be VGIA
* That's all we need
*/
ACPI_READ_FIELD(vgid_table.name_op, tables[i]);
ACPI_READ_FIELD(vgid_table.name_op, addr);
g_assert(vgid_table.name_op == 0x08); /* name */
ACPI_READ_ARRAY(vgid_table.vgia, tables[i]);
ACPI_READ_ARRAY(vgid_table.vgia, addr);
g_assert(memcmp(vgid_table.vgia, "VGIA", 4) == 0);
ACPI_READ_FIELD(vgid_table.val_op, tables[i]);
ACPI_READ_FIELD(vgid_table.val_op, addr);
g_assert(vgid_table.val_op == 0x0C); /* dword */
ACPI_READ_FIELD(vgid_table.vgia_val, tables[i]);
ACPI_READ_FIELD(vgid_table.vgia_val, addr);
/* The GUID is written at a fixed offset into the fw_cfg file
* in order to implement the "OVMF SDT Header probe suppressor"
* see docs/specs/vmgenid.txt for more details
*/
guid_offset = vgid_table.vgia_val + VMGENID_GUID_OFFSET;
guid_offset = le32_to_cpu(vgid_table.vgia_val) + VMGENID_GUID_OFFSET;
break;
}
}