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Message-Id: <20230927170015.295232-4-sunilvl@ventanamicro.com>
Date: Wed, 27 Sep 2023 22:30:14 +0530
From: Sunil V L <sunilvl@...tanamicro.com>
To: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-acpi@...r.kernel.org
Cc: Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>,
"Rafael J . Wysocki" <rafael@...nel.org>,
Len Brown <lenb@...nel.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>,
Andrew Jones <ajones@...tanamicro.com>,
Conor Dooley <conor.dooley@...rochip.com>,
Anup Patel <apatel@...tanamicro.com>,
Ard Biesheuvel <ardb@...nel.org>,
Alexandre Ghiti <alexghiti@...osinc.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Atish Kumar Patra <atishp@...osinc.com>,
Sunil V L <sunilvl@...tanamicro.com>
Subject: [PATCH v2 -next 3/4] RISC-V: cacheflush: Initialize CBO variables on ACPI systems
Using new interface to get the CBO block size information in RHCT,
initialize the variables on ACPI platforms.
Signed-off-by: Sunil V L <sunilvl@...tanamicro.com>
---
arch/riscv/mm/cacheflush.c | 37 +++++++++++++++++++++++++++++++------
1 file changed, 31 insertions(+), 6 deletions(-)
diff --git a/arch/riscv/mm/cacheflush.c b/arch/riscv/mm/cacheflush.c
index f1387272a551..8e59644e473c 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
@@ -124,15 +126,38 @@ 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;
+ unsigned int cpu;
+
+ if (!acpi_disabled) {
+ 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);
+ for_each_possible_cpu(cpu) {
+ if (acpi_disabled) {
+ node = of_cpu_device_node_get(cpu);
+ if (!node) {
+ pr_warn("Unable to find cpu node\n");
+ continue;
+ }
+
+ /* 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 {
+ acpi_get_cbo_block_size(rhct, cpu, &cbom_block_size,
+ &cboz_block_size, NULL);
+ }
}
+ if (!acpi_disabled && rhct)
+ acpi_put_table((struct acpi_table_header *)rhct);
+
if (cbom_block_size)
riscv_cbom_block_size = cbom_block_size;
--
2.39.2
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