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[PATCH v3 2/3] hw/acpi: Upgrade ACPI SPCR table to support SPCR table version 4 format

Sia Jee Heng posted 3 patches 3 months, 1 week ago
[PATCH v3 2/3] hw/acpi: Upgrade ACPI SPCR table to support SPCR table version 4 format
Posted by Sia Jee Heng 3 months, 1 week ago 
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 <jeeheng.sia@starfivetech.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
---
 hw/acpi/aml-build.c         | 14 +++++++++++---
 hw/arm/virt-acpi-build.c    | 10 ++++++++--
 hw/riscv/virt-acpi-build.c  | 12 +++++++++---
 include/hw/acpi/acpi-defs.h |  7 +++++--
 include/hw/acpi/aml-build.h |  2 +-
 5 files changed, 34 insertions(+), 11 deletions(-)

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 e10cad86dd..ae075dc9fd 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -435,11 +435,12 @@ 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,
@@ -463,9 +464,14 @@ 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 36d6a3a412..68ef15acac 100644
--- a/hw/riscv/virt-acpi-build.c
+++ b/hw/riscv/virt-acpi-build.c
@@ -200,14 +200,15 @@ 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 */
+        .interface_type = 0x12,       /* 16550 compatible */
         .base_addr.id = AML_AS_SYSTEM_MEMORY,
         .base_addr.width = 32,
         .base_addr.offset = 0,
@@ -229,9 +230,14 @@ 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
-- 
2.34.1
Re: [PATCH v3 2/3] hw/acpi: Upgrade ACPI SPCR table to support SPCR table version 4 format
Posted by Sunil V L 3 months, 1 week ago 
Hi Jee Heng,

On Mon, Aug 12, 2024 at 10:22:22PM -0700, Sia Jee Heng wrote:
> 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 <jeeheng.sia@starfivetech.com>
> Acked-by: Alistair Francis <alistair.francis@wdc.com>
> ---
>  hw/acpi/aml-build.c         | 14 +++++++++++---
>  hw/arm/virt-acpi-build.c    | 10 ++++++++--
>  hw/riscv/virt-acpi-build.c  | 12 +++++++++---
>  include/hw/acpi/acpi-defs.h |  7 +++++--
>  include/hw/acpi/aml-build.h |  2 +-
>  5 files changed, 34 insertions(+), 11 deletions(-)
> 
> 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 e10cad86dd..ae075dc9fd 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -435,11 +435,12 @@ 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,
> @@ -463,9 +464,14 @@ 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);
I request the same which I had asked earlier. Please keep SPCR for other
architectures like ARM intact. The latest revision is primarily required
for RISC-V. So, restrict the series only for RISC-V. The common
build_spcr() should create SPCR based on the revision parameter.

Thanks,
Sunil
RE: [PATCH v3 2/3] hw/acpi: Upgrade ACPI SPCR table to support SPCR table version 4 format
Posted by JeeHeng Sia 3 months ago 

> -----Original Message-----
> From: Sunil V L <sunilvl@ventanamicro.com>
> Sent: Monday, August 19, 2024 12:10 PM
> To: JeeHeng Sia <jeeheng.sia@starfivetech.com>
> Cc: qemu-arm@nongnu.org; qemu-devel@nongnu.org; qemu-riscv@nongnu.org; mst@redhat.com; imammedo@redhat.com;
> anisinha@redhat.com; peter.maydell@linaro.org; shannon.zhaosl@gmail.com; palmer@dabbelt.com; alistair.francis@wdc.com;
> bin.meng@windriver.com; liwei1518@gmail.com; dbarboza@ventanamicro.com; zhiwei_liu@linux.alibaba.com
> Subject: Re: [PATCH v3 2/3] hw/acpi: Upgrade ACPI SPCR table to support SPCR table version 4 format
> 
> Hi Jee Heng,
> 
> On Mon, Aug 12, 2024 at 10:22:22PM -0700, Sia Jee Heng wrote:
> > 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 <jeeheng.sia@starfivetech.com>
> > Acked-by: Alistair Francis <alistair.francis@wdc.com>
> > ---
> >  hw/acpi/aml-build.c         | 14 +++++++++++---
> >  hw/arm/virt-acpi-build.c    | 10 ++++++++--
> >  hw/riscv/virt-acpi-build.c  | 12 +++++++++---
> >  include/hw/acpi/acpi-defs.h |  7 +++++--
> >  include/hw/acpi/aml-build.h |  2 +-
> >  5 files changed, 34 insertions(+), 11 deletions(-)
> >
> > 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 e10cad86dd..ae075dc9fd 100644
> > --- a/hw/arm/virt-acpi-build.c
> > +++ b/hw/arm/virt-acpi-build.c
> > @@ -435,11 +435,12 @@ 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,
> > @@ -463,9 +464,14 @@ 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);
> I request the same which I had asked earlier. Please keep SPCR for other
> architectures like ARM intact. The latest revision is primarily required
> for RISC-V. So, restrict the series only for RISC-V. The common
> build_spcr() should create SPCR based on the revision parameter.
Since there is no disagreement from other arch owner, I will proceed to remove
the changes. thanks
> 
> Thanks,
> Sunil

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