driver inclusion category: feature bugzilla: https://atomgit.com/openeuler/kernel/issues/8904 ---------------------------------------------------------------------- Add support arm64.nocnp for start option,allowing it to be explicitly disabled in case of problems. Signed-off-by: Qinxin Xia <xiaqinxin@huawei.com> Signed-off-by: Hongye Lin <linhongye@h-partners.com> --- arch/arm64/include/asm/cpufeature.h | 1 + arch/arm64/kernel/cpufeature.c | 4 +++- arch/arm64/kernel/idreg-override.c | 11 +++++++++++ 3 files changed, 15 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index 759ea38b906c..d424cda70354 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -993,6 +993,7 @@ s64 arm64_ftr_safe_value(const struct arm64_ftr_bits *ftrp, s64 new, s64 cur); struct arm64_ftr_reg *get_arm64_ftr_reg(u32 sys_id); extern struct arm64_ftr_override id_aa64mmfr1_override; +extern struct arm64_ftr_override id_aa64mmfr2_override; extern struct arm64_ftr_override id_aa64pfr0_override; extern struct arm64_ftr_override id_aa64pfr1_override; extern struct arm64_ftr_override id_aa64zfr0_override; diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 898c93d73d83..87e43294c6a8 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -739,6 +739,7 @@ static const struct arm64_ftr_bits ftr_raz[] = { __ARM64_FTR_REG_OVERRIDE(#id, id, table, &no_override) struct arm64_ftr_override __ro_after_init id_aa64mmfr1_override; +struct arm64_ftr_override __ro_after_init id_aa64mmfr2_override; struct arm64_ftr_override __ro_after_init id_aa64pfr0_override; struct arm64_ftr_override __ro_after_init id_aa64pfr1_override; struct arm64_ftr_override __ro_after_init id_aa64zfr0_override; @@ -810,7 +811,8 @@ static const struct __ftr_reg_entry { ARM64_FTR_REG(SYS_ID_AA64MMFR0_EL1, ftr_id_aa64mmfr0), ARM64_FTR_REG_OVERRIDE(SYS_ID_AA64MMFR1_EL1, ftr_id_aa64mmfr1, &id_aa64mmfr1_override), - ARM64_FTR_REG(SYS_ID_AA64MMFR2_EL1, ftr_id_aa64mmfr2), + ARM64_FTR_REG_OVERRIDE(SYS_ID_AA64MMFR2_EL1, ftr_id_aa64mmfr2, + &id_aa64mmfr2_override), ARM64_FTR_REG(SYS_ID_AA64MMFR3_EL1, ftr_id_aa64mmfr3), /* Op1 = 0, CRn = 1, CRm = 2 */ diff --git a/arch/arm64/kernel/idreg-override.c b/arch/arm64/kernel/idreg-override.c index 8df8a585dcc3..d44a1bbe5621 100644 --- a/arch/arm64/kernel/idreg-override.c +++ b/arch/arm64/kernel/idreg-override.c @@ -55,6 +55,15 @@ static const struct ftr_set_desc mmfr1 __initconst = { }, }; +static const struct ftr_set_desc mmfr2 __initconst = { + .name = "id_aa64mmfr2", + .override = &id_aa64mmfr2_override, + .fields = { + FIELD("cnp", ID_AA64MMFR2_EL1_CnP_SHIFT, NULL), + {} + }, +}; + static bool __init pfr0_sve_filter(u64 val) { /* @@ -171,6 +180,7 @@ static const struct ftr_set_desc sw_features __initconst = { static const struct ftr_set_desc * const regs[] __initconst = { &mmfr1, + &mmfr2, &pfr0, &pfr1, &isar0, @@ -186,6 +196,7 @@ static const struct { } aliases[] __initconst = { { "kvm-arm.mode=nvhe", "id_aa64mmfr1.vh=0" }, { "kvm-arm.mode=protected", "id_aa64mmfr1.vh=0" }, + { "arm64.nocnp", "id_aa64mmfr2.cnp=0" }, { "arm64.nosve", "id_aa64pfr0.sve=0" }, { "arm64.nosme", "id_aa64pfr1.sme=0" }, { "arm64.nobti", "id_aa64pfr1.bt=0" }, -- 2.33.0