Commit bb96fb5a authored by Sunil V L's avatar Sunil V L Committed by Paul Walmsley
Browse files

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: default avatarSunil V L <sunilvl@ventanamicro.com>
Signed-off-by: default avatarAnup Patel <apatel@ventanamicro.com>
Acked-by: default avatarJassi Brar <jassisinghbrar@gmail.com>
Link: https://lore.kernel.org/r/20250818040920.272664-20-apatel@ventanamicro.com


Signed-off-by: default avatarPaul Walmsley <pjw@kernel.org>
parent 4d185fde

arch/riscv/include/asm/irq.h

+1 −0
Original line number Diff line number Diff line
@@ -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,

drivers/acpi/riscv/irq.c

+30 −0
Original line number Diff line number Diff line
@@ -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)