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platform: generic: Optimize extensions_init() to parse ISA extensions once

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Instead of parsing ISA extensions separately for each hart in the
generic_extensions_init() function, it is better to parse ISA extensions
for all available harts in the cold boot path. Also, this allows us
to remove fdt_isa_bitmap from scratch space and directly initialize
"extensions" in struct sbi_hart_features for each hart.

Signed-off-by: Anup Patel <anup.patel@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260521082625.1520870-3-anup.patel@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Anup Patel
2026-05-21 13:56:25 +05:30
committed by Anup Patel
parent a62385ab80
commit ecc92e87a9
13 changed files with 37 additions and 64 deletions
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platform/generic/include/platform_override.h
+1 -2
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@@ -10,7 +10,6 @@
#ifndef __PLATFORM_OVERRIDE_H__
#define __PLATFORM_OVERRIDE_H__
#include <sbi/sbi_hart.h>
#include <sbi/sbi_platform.h>
#include <sbi/sbi_types.h>
#include <sbi_utils/fdt/fdt_driver.h>
@@ -19,7 +18,7 @@ bool generic_cold_boot_allowed(u32 hartid);
int generic_nascent_init(void);
int generic_early_init(bool cold_boot);
int generic_final_init(bool cold_boot);
int generic_extensions_init(struct sbi_hart_features *hfeatures);
int generic_extensions_init(bool cold_boot);
int generic_domains_init(void);
int generic_pmu_init(void);
uint64_t generic_pmu_xlate_to_mhpmevent(uint32_t event_idx, uint64_t data);