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Commit c20917a7 authored by James Morse's avatar James Morse Committed by Greg Kroah-Hartman
Browse files

arm64: add ID_AA64ISAR2_EL1 sys register 



commit 9e45365f1469ef2b934f9d035975dbc9ad352116 upstream.

This is a new ID register, introduced in 8.7.

Signed-off-by: default avatarJoey Gouly <joey.gouly@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Reiji Watanabe <reijiw@google.com>
Acked-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211210165432.8106-3-joey.gouly@arm.com


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarJames Morse <james.morse@arm.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 067b8175

arch/arm64/include/asm/cpu.h

+1 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ struct cpuinfo_arm64 { 
	u64		reg_id_aa64dfr1;

	u64		reg_id_aa64isar0;

	u64		reg_id_aa64isar1;

	u64		reg_id_aa64isar2;

	u64		reg_id_aa64mmfr0;

	u64		reg_id_aa64mmfr1;

	u64		reg_id_aa64mmfr2;

arch/arm64/include/asm/sysreg.h

+1 −0
Original line number Diff line number Diff line
@@ -157,6 +157,7 @@ 


#define SYS_ID_AA64ISAR0_EL1		sys_reg(3, 0, 0, 6, 0)

#define SYS_ID_AA64ISAR1_EL1		sys_reg(3, 0, 0, 6, 1)

#define SYS_ID_AA64ISAR2_EL1		sys_reg(3, 0, 0, 6, 2)



#define SYS_ID_AA64MMFR0_EL1		sys_reg(3, 0, 0, 7, 0)

#define SYS_ID_AA64MMFR1_EL1		sys_reg(3, 0, 0, 7, 1)

arch/arm64/kernel/cpufeature.c

+9 −0
Original line number Diff line number Diff line
@@ -134,6 +134,10 @@ static const struct arm64_ftr_bits ftr_id_aa64isar1[] = { 
	ARM64_FTR_END,

};



static const struct arm64_ftr_bits ftr_id_aa64isar2[] = {

	ARM64_FTR_END,

};



static const struct arm64_ftr_bits ftr_id_aa64pfr0[] = {

	ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_CSV3_SHIFT, 4, 0),

	ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR0_CSV2_SHIFT, 4, 0),
@@ -361,6 +365,7 @@ static const struct __ftr_reg_entry { 
	/* Op1 = 0, CRn = 0, CRm = 6 */

	ARM64_FTR_REG(SYS_ID_AA64ISAR0_EL1, ftr_id_aa64isar0),

	ARM64_FTR_REG(SYS_ID_AA64ISAR1_EL1, ftr_id_aa64isar1),

	ARM64_FTR_REG(SYS_ID_AA64ISAR2_EL1, ftr_id_aa64isar2),



	/* Op1 = 0, CRn = 0, CRm = 7 */

	ARM64_FTR_REG(SYS_ID_AA64MMFR0_EL1, ftr_id_aa64mmfr0),
@@ -506,6 +511,7 @@ void __init init_cpu_features(struct cpuinfo_arm64 *info) 
	init_cpu_ftr_reg(SYS_ID_AA64DFR1_EL1, info->reg_id_aa64dfr1);

	init_cpu_ftr_reg(SYS_ID_AA64ISAR0_EL1, info->reg_id_aa64isar0);

	init_cpu_ftr_reg(SYS_ID_AA64ISAR1_EL1, info->reg_id_aa64isar1);

	init_cpu_ftr_reg(SYS_ID_AA64ISAR2_EL1, info->reg_id_aa64isar2);

	init_cpu_ftr_reg(SYS_ID_AA64MMFR0_EL1, info->reg_id_aa64mmfr0);

	init_cpu_ftr_reg(SYS_ID_AA64MMFR1_EL1, info->reg_id_aa64mmfr1);

	init_cpu_ftr_reg(SYS_ID_AA64MMFR2_EL1, info->reg_id_aa64mmfr2);
@@ -617,6 +623,8 @@ void update_cpu_features(int cpu, 
				      info->reg_id_aa64isar0, boot->reg_id_aa64isar0);

	taint |= check_update_ftr_reg(SYS_ID_AA64ISAR1_EL1, cpu,

				      info->reg_id_aa64isar1, boot->reg_id_aa64isar1);

	taint |= check_update_ftr_reg(SYS_ID_AA64ISAR2_EL1, cpu,

				      info->reg_id_aa64isar2, boot->reg_id_aa64isar2);



	/*

	 * Differing PARange support is fine as long as all peripherals and
@@ -737,6 +745,7 @@ static u64 __read_sysreg_by_encoding(u32 sys_id) 
	read_sysreg_case(SYS_ID_AA64MMFR2_EL1);

	read_sysreg_case(SYS_ID_AA64ISAR0_EL1);

	read_sysreg_case(SYS_ID_AA64ISAR1_EL1);

	read_sysreg_case(SYS_ID_AA64ISAR2_EL1);



	read_sysreg_case(SYS_CNTFRQ_EL0);

	read_sysreg_case(SYS_CTR_EL0);

arch/arm64/kernel/cpuinfo.c

+1 −0
Original line number Diff line number Diff line
@@ -333,6 +333,7 @@ static void __cpuinfo_store_cpu(struct cpuinfo_arm64 *info) 
	info->reg_id_aa64dfr1 = read_cpuid(ID_AA64DFR1_EL1);

	info->reg_id_aa64isar0 = read_cpuid(ID_AA64ISAR0_EL1);

	info->reg_id_aa64isar1 = read_cpuid(ID_AA64ISAR1_EL1);

	info->reg_id_aa64isar2 = read_cpuid(ID_AA64ISAR2_EL1);

	info->reg_id_aa64mmfr0 = read_cpuid(ID_AA64MMFR0_EL1);

	info->reg_id_aa64mmfr1 = read_cpuid(ID_AA64MMFR1_EL1);

	info->reg_id_aa64mmfr2 = read_cpuid(ID_AA64MMFR2_EL1);