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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/allwinner/sun20i-d1.c
+5 -2
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@@ -12,6 +12,7 @@
#include <sbi/sbi_bitops.h>
#include <sbi/sbi_ecall_interface.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_hart.h>
#include <sbi/sbi_hsm.h>
#include <sbi/sbi_platform.h>
#include <sbi/sbi_pmu.h>
@@ -197,11 +198,12 @@ static int sun20i_d1_final_init(bool cold_boot)
return generic_final_init(cold_boot);
}
static int sun20i_d1_extensions_init(struct sbi_hart_features *hfeatures)
static int sun20i_d1_extensions_init(bool cold_boot)
{
struct sbi_hart_features *hfeatures;
int rc;
rc = generic_extensions_init(hfeatures);
rc = generic_extensions_init(cold_boot);
if (rc)
return rc;
@@ -209,6 +211,7 @@ static int sun20i_d1_extensions_init(struct sbi_hart_features *hfeatures)
/* auto-detection doesn't work on t-head c9xx cores */
/* D1 has 29 mhpmevent csrs, but only 3-9,13-17 have valid value */
hfeatures = sbi_hart_features_ptr(sbi_scratch_thishart_ptr());
hfeatures->mhpm_mask = 0x0003e3f8;
hfeatures->mhpm_bits = 64;