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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/platform.c
+5 -3
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@@ -253,11 +253,13 @@ int generic_final_init(bool cold_boot)
return 0;
}
int generic_extensions_init(struct sbi_hart_features *hfeatures)
int generic_extensions_init(bool cold_boot)
{
if (!cold_boot)
return 0;
/* Parse the ISA string from FDT and enable the listed extensions */
return fdt_parse_isa_extensions(fdt_get_address(), current_hartid(),
hfeatures->extensions);
return fdt_parse_isa_extensions_all_harts(fdt_get_address());
}
int generic_domains_init(void)