This adds basic building blocks required for ID_MMFR5 CPU register which provides information about the implemented memory model and memory management support in AArch32 state. This is added per ARM DDI 0487F.a specification.
Cc: Catalin Marinas <[email protected]> Cc: Will Deacon <[email protected]> Cc: Marc Zyngier <[email protected]> Cc: Mark Rutland <[email protected]> Cc: James Morse <[email protected]> Cc: Suzuki K Poulose <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Suggested-by: Will Deacon <[email protected]> Signed-off-by: Anshuman Khandual <[email protected]> --- arch/arm64/include/asm/cpu.h | 1 + arch/arm64/include/asm/sysreg.h | 3 +++ arch/arm64/kernel/cpufeature.c | 10 ++++++++++ arch/arm64/kernel/cpuinfo.c | 1 + arch/arm64/kvm/sys_regs.c | 2 +- 5 files changed, 16 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/cpu.h b/arch/arm64/include/asm/cpu.h index d9a78bdec409..e1f5ef437671 100644 --- a/arch/arm64/include/asm/cpu.h +++ b/arch/arm64/include/asm/cpu.h @@ -45,6 +45,7 @@ struct cpuinfo_arm64 { u32 reg_id_mmfr1; u32 reg_id_mmfr2; u32 reg_id_mmfr3; + u32 reg_id_mmfr5; u32 reg_id_pfr0; u32 reg_id_pfr1; u32 reg_id_pfr2; diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index c1c97e08a799..b7f549d09c1c 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -147,6 +147,7 @@ #define SYS_ID_MMFR2_EL1 sys_reg(3, 0, 0, 1, 6) #define SYS_ID_MMFR3_EL1 sys_reg(3, 0, 0, 1, 7) #define SYS_ID_MMFR4_EL1 sys_reg(3, 0, 0, 2, 6) +#define SYS_ID_MMFR5_EL1 sys_reg(3, 0, 0, 3, 6) #define SYS_ID_ISAR0_EL1 sys_reg(3, 0, 0, 2, 0) #define SYS_ID_ISAR1_EL1 sys_reg(3, 0, 0, 2, 1) @@ -793,6 +794,8 @@ #define ID_ISAR6_DP_SHIFT 4 #define ID_ISAR6_JSCVT_SHIFT 0 +#define ID_MMFR5_ETS_SHIFT 0 + #define ID_PFR2_SSBS_SHIFT 4 #define ID_PFR2_CSV3_SHIFT 0 diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index faf644a66e89..3d5c31a7cd9d 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -408,6 +408,11 @@ static const struct arm64_ftr_bits ftr_id_isar4[] = { ARM64_FTR_END, }; +static const struct arm64_ftr_bits ftr_id_mmfr5[] = { + ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_MMFR5_ETS_SHIFT, 4, 0), + ARM64_FTR_END, +}; + static const struct arm64_ftr_bits ftr_id_isar6[] = { ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_I8MM_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_ISAR6_BF16_SHIFT, 4, 0), @@ -533,6 +538,7 @@ static const struct __ftr_reg_entry { ARM64_FTR_REG(SYS_MVFR2_EL1, ftr_mvfr2), ARM64_FTR_REG(SYS_ID_PFR2_EL1, ftr_id_pfr2), ARM64_FTR_REG(SYS_ID_DFR1_EL1, ftr_id_dfr1), + ARM64_FTR_REG(SYS_ID_MMFR5_EL1, ftr_id_mmfr5), /* Op1 = 0, CRn = 0, CRm = 4 */ ARM64_FTR_REG(SYS_ID_AA64PFR0_EL1, ftr_id_aa64pfr0), @@ -738,6 +744,7 @@ void __init init_cpu_features(struct cpuinfo_arm64 *info) init_cpu_ftr_reg(SYS_ID_MMFR1_EL1, info->reg_id_mmfr1); init_cpu_ftr_reg(SYS_ID_MMFR2_EL1, info->reg_id_mmfr2); init_cpu_ftr_reg(SYS_ID_MMFR3_EL1, info->reg_id_mmfr3); + init_cpu_ftr_reg(SYS_ID_MMFR5_EL1, info->reg_id_mmfr5); init_cpu_ftr_reg(SYS_ID_PFR0_EL1, info->reg_id_pfr0); init_cpu_ftr_reg(SYS_ID_PFR1_EL1, info->reg_id_pfr1); init_cpu_ftr_reg(SYS_ID_PFR2_EL1, info->reg_id_pfr2); @@ -872,6 +879,8 @@ static int update_32bit_cpu_features(int cpu, struct cpuinfo_arm64 *info, info->reg_id_mmfr2, boot->reg_id_mmfr2); taint |= check_update_ftr_reg(SYS_ID_MMFR3_EL1, cpu, info->reg_id_mmfr3, boot->reg_id_mmfr3); + taint |= check_update_ftr_reg(SYS_ID_MMFR5_EL1, cpu, + info->reg_id_mmfr5, boot->reg_id_mmfr5); taint |= check_update_ftr_reg(SYS_ID_PFR0_EL1, cpu, info->reg_id_pfr0, boot->reg_id_pfr0); taint |= check_update_ftr_reg(SYS_ID_PFR1_EL1, cpu, @@ -1012,6 +1021,7 @@ static u64 __read_sysreg_by_encoding(u32 sys_id) read_sysreg_case(SYS_ID_MMFR1_EL1); read_sysreg_case(SYS_ID_MMFR2_EL1); read_sysreg_case(SYS_ID_MMFR3_EL1); + read_sysreg_case(SYS_ID_MMFR5_EL1); read_sysreg_case(SYS_ID_ISAR0_EL1); read_sysreg_case(SYS_ID_ISAR1_EL1); read_sysreg_case(SYS_ID_ISAR2_EL1); diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c index 50a281703d9d..54579bf08f74 100644 --- a/arch/arm64/kernel/cpuinfo.c +++ b/arch/arm64/kernel/cpuinfo.c @@ -374,6 +374,7 @@ static void __cpuinfo_store_cpu(struct cpuinfo_arm64 *info) info->reg_id_mmfr1 = read_cpuid(ID_MMFR1_EL1); info->reg_id_mmfr2 = read_cpuid(ID_MMFR2_EL1); info->reg_id_mmfr3 = read_cpuid(ID_MMFR3_EL1); + info->reg_id_mmfr5 = read_cpuid(ID_MMFR5_EL1); info->reg_id_pfr0 = read_cpuid(ID_PFR0_EL1); info->reg_id_pfr1 = read_cpuid(ID_PFR1_EL1); info->reg_id_pfr2 = read_cpuid(ID_PFR2_EL1); diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 0723cfbff7e9..7d7a39b01135 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1458,7 +1458,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { ID_UNALLOCATED(3,3), ID_SANITISED(ID_PFR2_EL1), ID_HIDDEN(ID_DFR1_EL1), - ID_UNALLOCATED(3,6), + ID_SANITISED(ID_MMFR5_EL1), ID_UNALLOCATED(3,7), /* AArch64 ID registers */ -- 2.20.1
