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RISC-V: cacheflush: Initialize CBO variables on ACPI systems

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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>
Link: https://lore.kernel.org/r/20231018124007.1306159-5-sunilvl@ventanamicro.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Sunil V L 2023-10-18 18:10:07 +05:30 committed by Palmer Dabbelt
parent 9ca8756419
commit 2960f371f1
No known key found for this signature in database
GPG Key ID: 2E1319F35FBB1889
1 changed files with 19 additions and 6 deletions
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25
arch/riscv/mm/cacheflush.c
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@ -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;
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);
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;
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)