The test enables intel_iommu on q35, looks for and reads the DMAR table as well as its only DRHC structure (for now), checking the header and checksums.
Signed-off-by: Vasilis Liaskovitis <vlias...@gmail.com> --- tests/bios-tables-test.c | 46 +++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 45 insertions(+), 1 deletion(-) diff --git a/tests/bios-tables-test.c b/tests/bios-tables-test.c index 9e4d205..93b4b3f 100644 --- a/tests/bios-tables-test.c +++ b/tests/bios-tables-test.c @@ -45,6 +45,8 @@ typedef struct { AcpiRsdtDescriptorRev1 rsdt_table; AcpiFadtDescriptorRev1 fadt_table; AcpiFacsDescriptorRev1 facs_table; + AcpiTableDmar dmar_table; + AcpiDmarHardwareUnit drhd; uint32_t *rsdt_tables_addr; int rsdt_tables_nr; GArray *tables; @@ -371,6 +373,45 @@ static void test_acpi_dsdt_table(test_data *data) g_array_append_val(data->tables, dsdt_table); } +static void test_acpi_dmar_table(test_data *data) +{ + AcpiTableDmar *dmar_table = &data->dmar_table; + AcpiDmarHardwareUnit *drhd = &data->drhd; + struct AcpiTableHeader *header = (struct AcpiTableHeader *) dmar_table; + uint32_t addr, signature_le; + bool found_dmar = false; + char signature_str[5] = {}; + int i; + + memset(dmar_table, 0, sizeof(*dmar_table)); + + /* look for DMAR signature in the tables, FADT comes first so we skip it */ + for (i = 1; i < data->rsdt_tables_nr; i++) { + addr = data->rsdt_tables_addr[i]; + ACPI_READ_TABLE_HEADER(dmar_table, addr); + signature_le = cpu_to_le32(header->signature); + memcpy(signature_str, &signature_le, 4); + if (!g_strcmp0(signature_str, "DMAR")) { + found_dmar = true; + break; + } + } + g_assert(found_dmar); + ACPI_READ_FIELD(dmar_table->host_address_width, addr); + ACPI_READ_FIELD(dmar_table->flags, addr); + ACPI_READ_ARRAY_PTR(dmar_table->reserved, 10, addr); + + memset(drhd, 0, sizeof(*drhd)); + ACPI_READ_FIELD(drhd->type, addr); + ACPI_READ_FIELD(drhd->length, addr); + ACPI_READ_FIELD(drhd->flags, addr); + ACPI_READ_FIELD(drhd->pci_segment, addr); + ACPI_READ_FIELD(drhd->address, addr); + g_assert(!acpi_checksum((uint8_t *)dmar_table, sizeof(AcpiTableDmar) + + drhd->length)); + +} + static void test_acpi_tables(test_data *data) { int tables_nr = data->rsdt_tables_nr - 1; /* fadt is first */ @@ -747,6 +788,9 @@ static void test_acpi_one(const char *params, test_data *data) test_acpi_fadt_table(data); test_acpi_facs_table(data); test_acpi_dsdt_table(data); + if (strstr(params, "iommu=on")) { + test_acpi_dmar_table(data); + } test_acpi_tables(data); if (iasl) { @@ -779,7 +823,7 @@ static void test_acpi_tcg(void) memset(&data, 0, sizeof(data)); data.machine = MACHINE_Q35; - test_acpi_one("-machine q35,accel=tcg", &data); + test_acpi_one("-machine q35,accel=tcg,iommu=on", &data); free_test_data(&data); } -- 1.9.1