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KVM: arm64: Provide sanitized mmfr* registers at EL2

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We will need to read sanitized values of mmfr{0,1}_el1 at EL2 soon, so
add them to the list of copied variables.

Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210319100146.1149909-35-qperret@google.com
This commit is contained in:
Quentin Perret 2021-03-19 10:01:42 +00:00 committed by Marc Zyngier
parent 8942a237c7
commit def1aaf9e0
3 changed files with 6 additions and 0 deletions
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2
arch/arm64/include/asm/kvm_cpufeature.h
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@ -20,5 +20,7 @@
#endif
DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_ctrel0);
DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr0_el1);
DECLARE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr1_el1);
#endif

2
arch/arm64/kvm/hyp/nvhe/hyp-smp.c
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@ -13,6 +13,8 @@
* Copies of the host's CPU features registers holding sanitized values.
*/
DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_ctrel0);
DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr0_el1);
DEFINE_KVM_HYP_CPU_FTR_REG(arm64_ftr_reg_id_aa64mmfr1_el1);
/*
* nVHE copy of data structures tracking available CPU cores.

2
arch/arm64/kvm/sys_regs.c
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@ -2784,6 +2784,8 @@ struct __ftr_reg_copy_entry {
struct arm64_ftr_reg *dst;
} hyp_ftr_regs[] __initdata = {
CPU_FTR_REG_HYP_COPY(SYS_CTR_EL0, arm64_ftr_reg_ctrel0),
CPU_FTR_REG_HYP_COPY(SYS_ID_AA64MMFR0_EL1, arm64_ftr_reg_id_aa64mmfr0_el1),
CPU_FTR_REG_HYP_COPY(SYS_ID_AA64MMFR1_EL1, arm64_ftr_reg_id_aa64mmfr1_el1),
};
void __init setup_kvm_el2_caps(void)