[Qemu-devel] [PATCH 01/14] tests: acpi: add uefi_find_rsdp_addr() helper

[Igor Mammedov <imammedo@redhat.com>]

introduce UEFI specific counterpart to acpi_find_rsdp_address()
that will help to find RSDP address when [OA]VMF is used as
firmware. It requires a [OA]VMF built with PcdAcpiTestSupport=TRUE,
to locate RSDP address within 1Mb aligned ACPI test structure, tagged
with GUID AB87A6B1-2034-BDA0-71BD-375007757785

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
 tests/acpi-utils.h |  1 +
 tests/acpi-utils.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/tests/acpi-utils.h b/tests/acpi-utils.h
index ef388bb..3b11f47 100644
--- a/tests/acpi-utils.h
+++ b/tests/acpi-utils.h
@@ -46,6 +46,7 @@ typedef struct {
 
 uint8_t acpi_calc_checksum(const uint8_t *data, int len);
 uint32_t acpi_find_rsdp_address(QTestState *qts);
+uint64_t uefi_find_rsdp_addr(QTestState *qts, uint64_t start, uint64_t size);
 uint64_t acpi_get_xsdt_address(uint8_t *rsdp_table);
 void acpi_parse_rsdp_table(QTestState *qts, uint32_t addr, uint8_t *rsdp_table);
 void acpi_fetch_table(QTestState *qts, uint8_t **aml, uint32_t *aml_len,
diff --git a/tests/acpi-utils.c b/tests/acpi-utils.c
index cc33b46..b9ff9df 100644
--- a/tests/acpi-utils.c
+++ b/tests/acpi-utils.c
@@ -111,3 +111,46 @@ void acpi_fetch_table(QTestState *qts, uint8_t **aml, uint32_t *aml_len,
         g_assert(!acpi_calc_checksum(*aml, *aml_len));
     }
 }
+
+#define GUID_SIZE 16
+static uint8_t AcpiTestSupportGuid[GUID_SIZE] =
+     { 0xb1, 0xa6, 0x87, 0xab,
+       0x34, 0x20,
+       0xa0, 0xbd,
+       0x71, 0xbd, 0x37, 0x50, 0x07, 0x75, 0x77, 0x85 };
+
+typedef struct {
+    uint8_t signature_guid[16];
+    uint64_t rsdp10;
+    uint64_t rsdp20;
+} __attribute__((packed)) UefiTestSupport;
+
+/* Wait at most 600 seconds (test is slow with TCI and --enable-debug) */
+#define TEST_DELAY (1 * G_USEC_PER_SEC / 10)
+#define TEST_CYCLES MAX((600 * G_USEC_PER_SEC / TEST_DELAY), 1)
+#define MB 0x100000ULL
+uint64_t uefi_find_rsdp_addr(QTestState *qts, uint64_t start, uint64_t size)
+{
+    int i, j;
+    uint8_t data[GUID_SIZE];
+
+    for (i = 0; i < TEST_CYCLES; ++i) {
+        for (j = 0; j < size / MB; j++) {
+            /* look for GUID at every 1Mb block */
+            uint64_t addr = start + j * MB;
+
+            qtest_memread(qts, addr, data, sizeof(data));
+            if (!memcmp(AcpiTestSupportGuid, data, sizeof(data))) {
+                UefiTestSupport ret;
+
+                qtest_memread(qts, addr, &ret, sizeof(ret));
+                ret.rsdp10 = le64_to_cpu(ret.rsdp10);
+                ret.rsdp20 = le64_to_cpu(ret.rsdp20);
+                return ret.rsdp20 ? ret.rsdp20 : ret.rsdp10;
+            }
+        }
+        g_usleep(TEST_DELAY);
+    }
+    g_assert_not_reached();
+    return 0;
+}
-- 
2.7.4