From: Shannon Zhao <shannon.z...@linaro.org>
ACPI v5.1 defines GTDT for ARM devices as a place to describe timer
related information in the system. The Arch Timer interrupts must
be provided for GTDT.
Signed-off-by: Shannon Zhao <zhaoshengl...@huawei.com>
Signed-off-by: Shannon Zhao <shannon.z...@linaro.org>
---
hw/arm/virt-acpi-build.c | 30 ++++++++++++++++++++++++++++++
include/hw/acpi/acpi-defs.h | 37 +++++++++++++++++++++++++++++++++++++
2 files changed, 67 insertions(+)
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index c8245ef..a7aba75 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -176,6 +176,33 @@ static void acpi_dsdt_add_virtio(Aml *scope, const hwaddr
*mmio_addrs,
}
}
+/* GTDT */
+static void
+build_gtdt(GArray *table_data, GArray *linker, VirtGuestInfo *guest_info)
+{
+ int gtdt_start = table_data->len;
+ const struct acpi_gtdt_info *info = guest_info->gtdt_info;
+ AcpiGenericTimerTable *gtdt;
+
+ gtdt = acpi_data_push(table_data, sizeof *gtdt);
+ /* The interrupt values are the same with the device tree when adding 16 */
+ gtdt->secure_el1_interrupt = info->timer_s_el1;
+ gtdt->secure_el1_flags = ACPI_EDGE_SENSITIVE;
+
+ gtdt->non_secure_el1_interrupt = info->timer_ns_el1;
+ gtdt->non_secure_el1_flags = ACPI_EDGE_SENSITIVE;
+
+ gtdt->virtual_timer_interrupt = info->timer_virt;
+ gtdt->virtual_timer_flags = ACPI_EDGE_SENSITIVE;
+
+ gtdt->non_secure_el2_interrupt = info->timer_ns_el2;
+ gtdt->non_secure_el2_flags = ACPI_EDGE_SENSITIVE;
+
+ build_header(linker, table_data,
+ (void *)(table_data->data + gtdt_start), "GTDT",
+ table_data->len - gtdt_start, 1);
+}
+
/* MADT */
static void
build_madt(GArray *table_data, GArray *linker, VirtGuestInfo *guest_info,
@@ -318,6 +345,9 @@ void virt_acpi_build(VirtGuestInfo *guest_info,
AcpiBuildTables *tables)
acpi_add_table(table_offsets, tables_blob);
build_madt(tables_blob, tables->linker, guest_info, &cpuinfo);
+ acpi_add_table(table_offsets, tables_blob);
+ build_gtdt(tables_blob, tables->linker, guest_info);
+
/* Cleanup memory that's no longer used. */
g_array_free(table_offsets, true);
}
diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h
index e343728..ee40a5e 100644
--- a/include/hw/acpi/acpi-defs.h
+++ b/include/hw/acpi/acpi-defs.h
@@ -318,6 +318,43 @@ struct AcpiMadtGenericDistributor {
typedef struct AcpiMadtGenericDistributor AcpiMadtGenericDistributor;
/*
+ * Generic Timer Description Table (GTDT)
+ */
+
+#define ACPI_GTDT_INTERRUPT_MODE (1)
+#define ACPI_GTDT_INTERRUPT_POLARITY (1<<1)
+#define ACPI_GTDT_ALWAYS_ON (1<<2)
+
+/* Triggering */
+
+#define ACPI_LEVEL_SENSITIVE (uint8_t) 0x00
+#define ACPI_EDGE_SENSITIVE (uint8_t) 0x01
+
+/* Polarity */
+
+#define ACPI_ACTIVE_HIGH (uint8_t) 0x00
+#define ACPI_ACTIVE_LOW (uint8_t) 0x01
+#define ACPI_ACTIVE_BOTH (uint8_t) 0x02
+
+struct AcpiGenericTimerTable {
+ ACPI_TABLE_HEADER_DEF
+ uint64_t counter_block_addresss;
+ uint32_t reserved;
+ uint32_t secure_el1_interrupt;
+ uint32_t secure_el1_flags;
+ uint32_t non_secure_el1_interrupt;
+ uint32_t non_secure_el1_flags;
+ uint32_t virtual_timer_interrupt;
+ uint32_t virtual_timer_flags;
+ uint32_t non_secure_el2_interrupt;
+ uint32_t non_secure_el2_flags;
+ uint64_t counter_read_block_address;
+ uint32_t platform_timer_count;
+ uint32_t platform_timer_offset;
+} QEMU_PACKED;
+typedef struct AcpiGenericTimerTable AcpiGenericTimerTable;
+
+/*
* HPET Description Table
*/
struct Acpi20Hpet {
--
2.0.4
