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arm64/boot: Move global CPU override variables out of BSS

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Accessing BSS will no longer be permitted from the startup code in
arch/arm64/kernel/pi, as some of it executes before BSS is cleared.
Clearing BSS earlier would involve managing cache coherency explicitly
in software, which is a hassle we prefer to avoid.

So move some variables that are assigned by the startup code out of BSS
and into .data.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Yeoreum Yun <yeoreum.yun@arm.com>
Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com>
Link: https://lore.kernel.org/r/20250508114328.2460610-7-ardb+git@google.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Ard Biesheuvel 2025-05-08 13:43:31 +02:00 committed by Will Deacon
parent 93d0d6f8a6
commit 4afff6cc9a
1 changed files with 10 additions and 10 deletions
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20
arch/arm64/kernel/cpufeature.c
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@ -758,17 +758,17 @@ static const struct arm64_ftr_bits ftr_raz[] = {
#define ARM64_FTR_REG(id, table) \
__ARM64_FTR_REG_OVERRIDE(#id, id, table, &no_override)
struct arm64_ftr_override id_aa64mmfr0_override;
struct arm64_ftr_override id_aa64mmfr1_override;
struct arm64_ftr_override id_aa64mmfr2_override;
struct arm64_ftr_override id_aa64pfr0_override;
struct arm64_ftr_override id_aa64pfr1_override;
struct arm64_ftr_override id_aa64zfr0_override;
struct arm64_ftr_override id_aa64smfr0_override;
struct arm64_ftr_override id_aa64isar1_override;
struct arm64_ftr_override id_aa64isar2_override;
struct arm64_ftr_override __read_mostly id_aa64mmfr0_override;
struct arm64_ftr_override __read_mostly id_aa64mmfr1_override;
struct arm64_ftr_override __read_mostly id_aa64mmfr2_override;
struct arm64_ftr_override __read_mostly id_aa64pfr0_override;
struct arm64_ftr_override __read_mostly id_aa64pfr1_override;
struct arm64_ftr_override __read_mostly id_aa64zfr0_override;
struct arm64_ftr_override __read_mostly id_aa64smfr0_override;
struct arm64_ftr_override __read_mostly id_aa64isar1_override;
struct arm64_ftr_override __read_mostly id_aa64isar2_override;
struct arm64_ftr_override arm64_sw_feature_override;
struct arm64_ftr_override __read_mostly arm64_sw_feature_override;
static const struct __ftr_reg_entry {
u32 sys_id;