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From: Sunil V L <sunilvl@ventanamicro.com>
To: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	linux-acpi@vger.kernel.org
Cc: Anup Patel <apatel@ventanamicro.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	Conor Dooley <conor.dooley@microchip.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Andrew Jones <ajones@ventanamicro.com>,
	Len Brown <lenb@kernel.org>
Subject: [PATCH v4 -next 4/4] RISC-V: cacheflush: Initialize CBO variables on ACPI systems
Date: Wed, 18 Oct 2023 18:10:07 +0530	[thread overview]
Message-ID: <20231018124007.1306159-5-sunilvl@ventanamicro.com> (raw)
In-Reply-To: <20231018124007.1306159-1-sunilvl@ventanamicro.com>

Initialize the CBO variables on ACPI based systems using information in
RHCT.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
---
 arch/riscv/mm/cacheflush.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/arch/riscv/mm/cacheflush.c b/arch/riscv/mm/cacheflush.c
index f1387272a551..55a34f2020a8 100644
--- a/arch/riscv/mm/cacheflush.c
+++ b/arch/riscv/mm/cacheflush.c
@@ -3,7 +3,9 @@
  * Copyright (C) 2017 SiFive
  */
 
+#include <linux/acpi.h>
 #include <linux/of.h>
+#include <asm/acpi.h>
 #include <asm/cacheflush.h>
 
 #ifdef CONFIG_SMP
@@ -124,13 +126,24 @@ void __init riscv_init_cbo_blocksizes(void)
 	unsigned long cbom_hartid, cboz_hartid;
 	u32 cbom_block_size = 0, cboz_block_size = 0;
 	struct device_node *node;
+	struct acpi_table_header *rhct;
+	acpi_status status;
+
+	if (acpi_disabled) {
+		for_each_of_cpu_node(node) {
+			/* set block-size for cbom and/or cboz extension if available */
+			cbo_get_block_size(node, "riscv,cbom-block-size",
+					   &cbom_block_size, &cbom_hartid);
+			cbo_get_block_size(node, "riscv,cboz-block-size",
+					   &cboz_block_size, &cboz_hartid);
+		}
+	} else {
+		status = acpi_get_table(ACPI_SIG_RHCT, 0, &rhct);
+		if (ACPI_FAILURE(status))
+			return;
 
-	for_each_of_cpu_node(node) {
-		/* set block-size for cbom and/or cboz extension if available */
-		cbo_get_block_size(node, "riscv,cbom-block-size",
-				   &cbom_block_size, &cbom_hartid);
-		cbo_get_block_size(node, "riscv,cboz-block-size",
-				   &cboz_block_size, &cboz_hartid);
+		acpi_get_cbo_block_size(rhct, &cbom_block_size, &cboz_block_size, NULL);
+		acpi_put_table((struct acpi_table_header *)rhct);
 	}
 
 	if (cbom_block_size)
-- 
2.39.2


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      parent reply	other threads:[~2023-10-18 12:40 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-18 12:40 [PATCH v4 -next 0/4] RISC-V: ACPI improvements Sunil V L
2023-10-18 12:40 ` [PATCH v4 -next 1/4] RISC-V: ACPI: Enhance acpi_os_ioremap with MMIO remapping Sunil V L
2023-10-18 12:40 ` [PATCH v4 -next 2/4] RISC-V: ACPI: Update the return value of acpi_get_rhct() Sunil V L
2023-10-18 13:05   ` Andrew Jones
2023-10-18 12:40 ` [PATCH v4 -next 3/4] RISC-V: ACPI: RHCT: Add function to get CBO block sizes Sunil V L
2023-10-18 12:40 ` Sunil V L [this message]

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