From: "Michael S. Tsirkin" <mst@redhat.com>
To: Sia Jee Heng <jeeheng.sia@starfivetech.com>
Cc: qemu-arm@nongnu.org, qemu-devel@nongnu.org,
qemu-riscv@nongnu.org, imammedo@redhat.com, anisinha@redhat.com,
peter.maydell@linaro.org, shannon.zhaosl@gmail.com,
sunilvl@ventanamicro.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 v2 2/3] hw/acpi: Upgrade ACPI SPCR table to support SPCR table version 4 format
Date: Mon, 13 May 2024 02:31:01 -0400 [thread overview]
Message-ID: <20240513023035-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20240507052212.291137-3-jeeheng.sia@starfivetech.com>
On Mon, May 06, 2024 at 10:22:11PM -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>
What does this achieve? We don't normally change unless it gets
us some useful feature.
> ---
> 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 6a1bde61ce..cb345e8659 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -428,11 +428,12 @@ 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,
> @@ -456,9 +457,14 @@ 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..5fa3942491 100644
> --- a/hw/riscv/virt-acpi-build.c
> +++ b/hw/riscv/virt-acpi-build.c
> @@ -176,14 +176,15 @@ 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,
> @@ -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
> --
> 2.34.1
next prev parent reply other threads:[~2024-05-13 6:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-07 5:22 [PATCH v2 0/3] Upgrade ACPI SPCR table to support SPCR table version 4 format Sia Jee Heng
2024-05-07 5:22 ` [PATCH v2 1/3] qtest: allow SPCR acpi table changes Sia Jee Heng
2024-05-13 3:55 ` Alistair Francis
2024-05-13 6:31 ` Michael S. Tsirkin
2024-05-13 10:36 ` Alistair Francis
2024-05-14 9:22 ` Peter Maydell
2024-05-07 5:22 ` [PATCH v2 2/3] hw/acpi: Upgrade ACPI SPCR table to support SPCR table version 4 format Sia Jee Heng
2024-05-13 4:01 ` Alistair Francis
2024-05-13 5:16 ` Sunil V L
2024-05-14 11:16 ` JeeHeng Sia
2024-05-13 6:31 ` Michael S. Tsirkin [this message]
2024-05-14 11:18 ` JeeHeng Sia
2024-05-07 5:22 ` [PATCH v2 3/3] tests/qtest/bios-tables-test: Update virt SPCR golden references Sia Jee Heng
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