diff options
| author | Marc Zyngier <maz@kernel.org> | 2023-06-09 17:21:56 +0100 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2023-06-12 23:17:24 +0000 |
| commit | 75c76ab5a641b64e872b6e136b5edf8a72009cc6 (patch) | |
| tree | ddaf53563da7694b8ec42f3f4d87bdb815332438 /arch/arm64/kvm/hyp/nvhe/switch.c | |
| parent | 6537565fd9b7f169cda025482f6de2646cf7b60a (diff) | |
KVM: arm64: Rework CPTR_EL2 programming for HVHE configuration
Just like we repainted the early arm64 code, we need to update
the CPTR_EL2 accesses that are taking place in the nVHE code
when hVHE is used, making them look as if they were CPACR_EL1
accesses. Just like the VHE code.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230609162200.2024064-14-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch/arm64/kvm/hyp/nvhe/switch.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/switch.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/switch.c index 71fa16a0dc77..5fa0b1c9ee8d 100644 --- a/arch/arm64/kvm/hyp/nvhe/switch.c +++ b/arch/arm64/kvm/hyp/nvhe/switch.c @@ -44,13 +44,24 @@ static void __activate_traps(struct kvm_vcpu *vcpu) __activate_traps_common(vcpu); val = vcpu->arch.cptr_el2; - val |= CPTR_EL2_TTA | CPTR_EL2_TAM; + val |= CPTR_EL2_TAM; /* Same bit irrespective of E2H */ + val |= has_hvhe() ? CPACR_EL1_TTA : CPTR_EL2_TTA; + if (cpus_have_final_cap(ARM64_SME)) { + if (has_hvhe()) + val &= ~(CPACR_EL1_SMEN_EL1EN | CPACR_EL1_SMEN_EL0EN); + else + val |= CPTR_EL2_TSM; + } + if (!guest_owns_fp_regs(vcpu)) { - val |= CPTR_EL2_TFP | CPTR_EL2_TZ; + if (has_hvhe()) + val &= ~(CPACR_EL1_FPEN_EL0EN | CPACR_EL1_FPEN_EL1EN | + CPACR_EL1_ZEN_EL0EN | CPACR_EL1_ZEN_EL1EN); + else + val |= CPTR_EL2_TFP | CPTR_EL2_TZ; + __activate_traps_fpsimd32(vcpu); } - if (cpus_have_final_cap(ARM64_SME)) - val |= CPTR_EL2_TSM; write_sysreg(val, cptr_el2); write_sysreg(__this_cpu_read(kvm_hyp_vector), vbar_el2); @@ -73,7 +84,6 @@ static void __activate_traps(struct kvm_vcpu *vcpu) static void __deactivate_traps(struct kvm_vcpu *vcpu) { extern char __kvm_hyp_host_vector[]; - u64 cptr; ___deactivate_traps(vcpu); @@ -98,13 +108,7 @@ static void __deactivate_traps(struct kvm_vcpu *vcpu) write_sysreg(this_cpu_ptr(&kvm_init_params)->hcr_el2, hcr_el2); - cptr = CPTR_EL2_DEFAULT; - if (vcpu_has_sve(vcpu) && (vcpu->arch.fp_state == FP_STATE_GUEST_OWNED)) - cptr |= CPTR_EL2_TZ; - if (cpus_have_final_cap(ARM64_SME)) - cptr &= ~CPTR_EL2_TSM; - - write_sysreg(cptr, cptr_el2); + kvm_reset_cptr_el2(vcpu); write_sysreg(__kvm_hyp_host_vector, vbar_el2); } |