diff options
| author | Sunil V L <sunilvl@ventanamicro.com> | 2025-08-18 09:39:15 +0530 |
|---|---|---|
| committer | Paul Walmsley <pjw@kernel.org> | 2025-09-25 19:49:09 -0600 |
| commit | bb96fb5a799a128bb478e1ea3dab25a484aadf63 (patch) | |
| tree | a08232c73bdf1a02717b2791094b0217105756a9 | |
| parent | 4d185fdeef67d0c2c5d4a142392cf1ade3786dd2 (diff) | |
ACPI: RISC-V: Add RPMI System MSI to GSI mapping
The RPMI System MSI device will provide GSIs to downstream devices
(such as GED) so add it to the RISC-V GSI to fwnode mapping.
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Link: https://lore.kernel.org/r/20250818040920.272664-20-apatel@ventanamicro.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>
| -rw-r--r-- | arch/riscv/include/asm/irq.h | 1 | ||||
| -rw-r--r-- | drivers/acpi/riscv/irq.c | 30 |
2 files changed, 31 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/irq.h b/arch/riscv/include/asm/irq.h index 7ec592fe430a..e29ded3416b4 100644 --- a/arch/riscv/include/asm/irq.h +++ b/arch/riscv/include/asm/irq.h @@ -32,6 +32,7 @@ enum riscv_irqchip_type { ACPI_RISCV_IRQCHIP_IMSIC = 0x01, ACPI_RISCV_IRQCHIP_PLIC = 0x02, ACPI_RISCV_IRQCHIP_APLIC = 0x03, + ACPI_RISCV_IRQCHIP_SMSI = 0x04, }; int riscv_acpi_get_gsi_info(struct fwnode_handle *fwnode, u32 *gsi_base, diff --git a/drivers/acpi/riscv/irq.c b/drivers/acpi/riscv/irq.c index cc1928422418..d9a2154d6c6a 100644 --- a/drivers/acpi/riscv/irq.c +++ b/drivers/acpi/riscv/irq.c @@ -168,6 +168,33 @@ static int __init riscv_acpi_register_ext_intc(u32 gsi_base, u32 nr_irqs, u32 nr return 0; } +static acpi_status __init riscv_acpi_create_gsi_map_smsi(acpi_handle handle, u32 level, + void *context, void **return_value) +{ + acpi_status status; + u64 gbase; + + if (!acpi_has_method(handle, "_GSB")) { + acpi_handle_err(handle, "_GSB method not found\n"); + return AE_ERROR; + } + + status = acpi_evaluate_integer(handle, "_GSB", NULL, &gbase); + if (ACPI_FAILURE(status)) { + acpi_handle_err(handle, "failed to evaluate _GSB method\n"); + return status; + } + + riscv_acpi_register_ext_intc(gbase, 0, 0, 0, ACPI_RISCV_IRQCHIP_SMSI); + status = riscv_acpi_update_gsi_handle((u32)gbase, handle); + if (ACPI_FAILURE(status)) { + acpi_handle_err(handle, "failed to find the GSI mapping entry\n"); + return status; + } + + return AE_OK; +} + static acpi_status __init riscv_acpi_create_gsi_map(acpi_handle handle, u32 level, void *context, void **return_value) { @@ -222,6 +249,9 @@ void __init riscv_acpi_init_gsi_mapping(void) if (acpi_table_parse_madt(ACPI_MADT_TYPE_APLIC, riscv_acpi_aplic_parse_madt, 0) > 0) acpi_get_devices("RSCV0002", riscv_acpi_create_gsi_map, NULL, NULL); + + /* Unlike PLIC/APLIC, SYSMSI doesn't have MADT */ + acpi_get_devices("RSCV0006", riscv_acpi_create_gsi_map_smsi, NULL, NULL); } static acpi_handle riscv_acpi_get_gsi_handle(u32 gsi) |