linux-kernel - [PATCH V2 02/21] ACPICA: MADT: Add RISC-V INTC interrupt controller

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Date:   Thu, 16 Feb 2023 23:50:24 +0530
From:   Sunil V L <sunilvl@...tanamicro.com>
To:     Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>, Jonathan Corbet <corbet@....net>
Cc:     linux-riscv@...ts.infradead.org, linux-acpi@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Conor Dooley <conor.dooley@...rochip.com>,
        Andrew Jones <ajones@...tanamicro.com>,
        Anup Patel <apatel@...tanamicro.com>,
        Atish Patra <atishp@...osinc.com>,
        Sunil V L <sunilvl@...tanamicro.com>,
        Robert Moore <robert.moore@...el.com>,
        acpica-devel@...ts.linuxfoundation.org,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>
Subject: [PATCH V2 02/21] ACPICA: MADT: Add RISC-V INTC interrupt controller

The ECR to add RISC-V INTC interrupt controller is approved by
the UEFI forum and will be available in the next revision of
the ACPI specification.

This patch is not yet merged in ACPICA but a PR is raised.

ACPICA PR: https://github.com/acpica/acpica/pull/804
Reference: Mantis ID: 2348

Cc: Robert Moore <robert.moore@...el.com>
Cc: acpica-devel@...ts.linuxfoundation.org
Signed-off-by: Sunil V L <sunilvl@...tanamicro.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 include/acpi/actbl2.h | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index b2973dbe37ee..abb700d246df 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -891,7 +891,8 @@ enum acpi_madt_type {
 	ACPI_MADT_TYPE_MSI_PIC = 21,
 	ACPI_MADT_TYPE_BIO_PIC = 22,
 	ACPI_MADT_TYPE_LPC_PIC = 23,
-	ACPI_MADT_TYPE_RESERVED = 24,	/* 24 to 0x7F are reserved */
+	ACPI_MADT_TYPE_RINTC = 24,
+	ACPI_MADT_TYPE_RESERVED = 25,   /* 25 to 0x7F are reserved */
 	ACPI_MADT_TYPE_OEM_RESERVED = 0x80	/* 0x80 to 0xFF are reserved for OEM use */
 };
 
@@ -1250,6 +1251,24 @@ enum acpi_madt_lpc_pic_version {
 	ACPI_MADT_LPC_PIC_VERSION_RESERVED = 2	/* 2 and greater are reserved */
 };
 
+/* 24: RISC-V INTC */
+struct acpi_madt_rintc {
+	struct acpi_subtable_header header;
+	u8 version;
+	u8 reserved;
+	u32 flags;
+	u64 hart_id;
+	u32 uid;  /* ACPI processor UID */
+};
+
+/* Values for RISC-V INTC Version field above */
+
+enum acpi_madt_rintc_version {
+	ACPI_MADT_RINTC_VERSION_NONE       = 0,
+	ACPI_MADT_RINTC_VERSION_V1         = 1,
+	ACPI_MADT_RINTC_VERSION_RESERVED   = 2	/* 2 and greater are reserved */
+};
+
 /* 80: OEM data */
 
 struct acpi_madt_oem_data {
-- 
2.34.1