[v1,2/2] hw/acpi: Upgrade ACPI SPCR table to support SPCR table version 4 format

Commit Message

Sia Jee Heng May 2, 2024, 5:12 a.m. UTC

Update the SPCR table to accommodate the SPCR Table version 4 [1].
The SPCR table has been modified to adhere to the version 4 format [2].

[1]: https://learn.microsoft.com/en-us/windows-hardware/drivers/serports/serial-port-console-redirection-table
[2]: https://github.com/acpica/acpica/pull/931

Signed-off-by: Sia Jee Heng <[e-mail]>
---
 hw/acpi/aml-build.c         | 14 +++++++++++---
 hw/arm/virt-acpi-build.c    | 10 ++++++++--
 hw/riscv/virt-acpi-build.c  | 10 ++++++++--
 include/hw/acpi/acpi-defs.h |  7 +++++--
 include/hw/acpi/aml-build.h |  2 +-
 5 files changed, 33 insertions(+), 10 deletions(-)

Patch

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 6d4517cfbe..7c43573eef 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -1996,7 +1996,7 @@  static void build_processor_hierarchy_node(GArray *tbl, uint32_t flags,
 
 void build_spcr(GArray *table_data, BIOSLinker *linker,
                 const AcpiSpcrData *f, const uint8_t rev,
-                const char *oem_id, const char *oem_table_id)
+                const char *oem_id, const char *oem_table_id, const char *name)
 {
     AcpiTable table = { .sig = "SPCR", .rev = rev, .oem_id = oem_id,
                         .oem_table_id = oem_table_id };
@@ -2042,8 +2042,16 @@  void build_spcr(GArray *table_data, BIOSLinker *linker,
     build_append_int_noprefix(table_data, f->pci_flags, 4);
     /* PCI Segment */
     build_append_int_noprefix(table_data, f->pci_segment, 1);
-    /* Reserved */
-    build_append_int_noprefix(table_data, 0, 4);
+    /* UartClkFreq */
+    build_append_int_noprefix(table_data, f->uart_clk_freq, 4);
+    /* PreciseBaudrate */
+    build_append_int_noprefix(table_data, f->precise_baudrate, 4);
+    /* NameSpaceStringLength */
+    build_append_int_noprefix(table_data, f->namespace_string_length, 2);
+    /* NameSpaceStringOffset */
+    build_append_int_noprefix(table_data, f->namespace_string_offset, 2);
+    /* NamespaceString[] */
+    g_array_append_vals(table_data, name, f->namespace_string_length);
 
     acpi_table_end(linker, &table);
 }
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index c3ccfef026..fc7b0176ed 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -429,11 +429,12 @@  build_iort(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
 
 /*
  * Serial Port Console Redirection Table (SPCR)
- * Rev: 1.07
+ * Rev: 1.10
  */
 static void
 spcr_setup(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
 {
+    const char name[] = ".";
     AcpiSpcrData serial = {
         .interface_type = 3,       /* ARM PL011 UART */
         .base_addr.id = AML_AS_SYSTEM_MEMORY,
@@ -457,9 +458,14 @@  spcr_setup(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
         .pci_function = 0,
         .pci_flags = 0,
         .pci_segment = 0,
+        .uart_clk_freq = 0,
+        .precise_baudrate = 0,
+        .namespace_string_length = sizeof(name),
+        .namespace_string_offset = 88,
     };
 
-    build_spcr(table_data, linker, &serial, 2, vms->oem_id, vms->oem_table_id);
+    build_spcr(table_data, linker, &serial, 4, vms->oem_id, vms->oem_table_id,
+               name);
 }
 
 /*
diff --git a/hw/riscv/virt-acpi-build.c b/hw/riscv/virt-acpi-build.c
index 0925528160..5712211847 100644
--- a/hw/riscv/virt-acpi-build.c
+++ b/hw/riscv/virt-acpi-build.c
@@ -176,12 +176,13 @@  acpi_dsdt_add_uart(Aml *scope, const MemMapEntry *uart_memmap,
 
 /*
  * Serial Port Console Redirection Table (SPCR)
- * Rev: 1.07
+ * Rev: 1.10
  */
 
 static void
 spcr_setup(GArray *table_data, BIOSLinker *linker, RISCVVirtState *s)
 {
+    const char name[] = ".";
     AcpiSpcrData serial = {
         .interface_type = 0,       /* 16550 compatible */
         .base_addr.id = AML_AS_SYSTEM_MEMORY,
@@ -205,9 +206,14 @@  spcr_setup(GArray *table_data, BIOSLinker *linker, RISCVVirtState *s)
         .pci_function = 0,
         .pci_flags = 0,
         .pci_segment = 0,
+        .uart_clk_freq = 0,
+        .precise_baudrate = 0,
+        .namespace_string_length = sizeof(name),
+        .namespace_string_offset = 88,
     };
 
-    build_spcr(table_data, linker, &serial, 2, s->oem_id, s->oem_table_id);
+    build_spcr(table_data, linker, &serial, 4, s->oem_id, s->oem_table_id,
+               name);
 }
 
 /* RHCT Node[N] starts at offset 56 */
diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h
index 0e6e82b339..2e6e341998 100644
--- a/include/hw/acpi/acpi-defs.h
+++ b/include/hw/acpi/acpi-defs.h
@@ -112,7 +112,6 @@  typedef struct AcpiSpcrData {
     uint8_t flow_control;
     uint8_t terminal_type;
     uint8_t language;
-    uint8_t reserved1;
     uint16_t pci_device_id;    /* Must be 0xffff if not PCI device */
     uint16_t pci_vendor_id;    /* Must be 0xffff if not PCI device */
     uint8_t pci_bus;
@@ -120,7 +119,11 @@  typedef struct AcpiSpcrData {
     uint8_t pci_function;
     uint32_t pci_flags;
     uint8_t pci_segment;
-    uint32_t reserved2;
+    uint32_t uart_clk_freq;
+    uint32_t precise_baudrate;
+    uint32_t namespace_string_length;
+    uint32_t namespace_string_offset;
+    char namespace_string[];
 } AcpiSpcrData;
 
 #define ACPI_FADT_ARM_PSCI_COMPLIANT  (1 << 0)
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index a3784155cb..68c0f2dbee 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -500,5 +500,5 @@  void build_tpm2(GArray *table_data, BIOSLinker *linker, GArray *tcpalog,
 
 void build_spcr(GArray *table_data, BIOSLinker *linker,
                 const AcpiSpcrData *f, const uint8_t rev,
-                const char *oem_id, const char *oem_table_id);
+                const char *oem_id, const char *oem_table_id, const char *name);
 #endif