linux-kernel - [RFC PATCH v1 02/21] ACPICA: RHCT: Add flags, CMO and MMU nodes

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Date:   Thu,  3 Aug 2023 23:28:57 +0530
From:   Sunil V L <sunilvl@...tanamicro.com>
To:     linux-doc@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-acpi@...r.kernel.org, linux-pci@...r.kernel.org
Cc:     Jonathan Corbet <corbet@....net>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Daniel Scally <djrscally@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Anup Patel <anup@...infault.org>,
        Marc Zyngier <maz@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Robert Moore <robert.moore@...el.com>,
        Haibo Xu <haibo1.xu@...el.com>,
        Andrew Jones <ajones@...tanamicro.com>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Atish Kumar Patra <atishp@...osinc.com>,
        Sunil V L <sunilvl@...tanamicro.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>
Subject: [RFC PATCH v1 02/21] ACPICA: RHCT: Add flags, CMO and MMU nodes

ACPICA commit 2eded5a6a13d892b7dc3be6096e7b1e8d4407600

Update RHCT table with below details.

 1) Add additional structure to describe the Cache Management
    Operation (CMO) related information.

 2) Add structure to describe MMU type.

 3) Convert the current reserved field to flags and define
    a flag to indicate timer capability.

This codefirst ECR is approved by UEFI forum and will
be part of next ACPI spec version.

Link: https://github.com/acpica/acpica/commit/2eded5a6
Signed-off-by: Sunil V L <sunilvl@...tanamicro.com>
Signed-off-by: Bob Moore <robert.moore@...el.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 include/acpi/actbl2.h | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index 280ab4c7f77a..3751ae69432f 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -2778,12 +2778,15 @@ enum acpi_rgrt_image_type {
 
 struct acpi_table_rhct {
 	struct acpi_table_header header;	/* Common ACPI table header */
-	u32 reserved;
+	u32 flags;		/* RHCT flags */
 	u64 time_base_freq;
 	u32 node_count;
 	u32 node_offset;
 };
 
+/* RHCT Flags */
+
+#define ACPI_RHCT_TIMER_CANNOT_WAKEUP_CPU       (1)
 /*
  * RHCT subtables
  */
@@ -2797,6 +2800,9 @@ struct acpi_rhct_node_header {
 
 enum acpi_rhct_node_type {
 	ACPI_RHCT_NODE_TYPE_ISA_STRING = 0x0000,
+	ACPI_RHCT_NODE_TYPE_CMO = 0x0001,
+	ACPI_RHCT_NODE_TYPE_MMU = 0x0002,
+	ACPI_RHCT_NODE_TYPE_RESERVED = 0x0003,
 	ACPI_RHCT_NODE_TYPE_HART_INFO = 0xFFFF,
 };
 
@@ -2810,6 +2816,24 @@ struct acpi_rhct_isa_string {
 	char isa[];
 };
 
+struct acpi_rhct_cmo_node {
+	u8 reserved;		/* Must be zero */
+	u8 cbom_size;		/* CBOM size in powerof 2 */
+	u8 cbop_size;		/* CBOP size in powerof 2 */
+	u8 cboz_size;		/* CBOZ size in powerof 2 */
+};
+
+struct acpi_rhct_mmu_node {
+	u8 reserved;		/* Must be zero */
+	u8 mmu_type;		/* Virtual Address Scheme */
+};
+
+enum acpi_rhct_mmu_type {
+	ACPI_RHCT_MMU_TYPE_SV39 = 0,
+	ACPI_RHCT_MMU_TYPE_SV48 = 1,
+	ACPI_RHCT_MMU_TYPE_SV57 = 2
+};
+
 /* Hart Info node structure */
 struct acpi_rhct_hart_info {
 	u16 num_offsets;
-- 
2.39.2