diff options
Diffstat (limited to 'arch/arm64/kvm/hyp/include/hyp/switch.h')
| -rw-r--r-- | arch/arm64/kvm/hyp/include/hyp/switch.h | 127 |
1 files changed, 94 insertions, 33 deletions
diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h index 34f222af6165..9cfe6bd1dbe4 100644 --- a/arch/arm64/kvm/hyp/include/hyp/switch.h +++ b/arch/arm64/kvm/hyp/include/hyp/switch.h @@ -70,20 +70,26 @@ static inline void __activate_traps_fpsimd32(struct kvm_vcpu *vcpu) } } -static inline bool __hfgxtr_traps_required(void) -{ - if (cpus_have_final_cap(ARM64_SME)) - return true; - - if (cpus_have_final_cap(ARM64_WORKAROUND_AMPERE_AC03_CPU_38)) - return true; +#define compute_clr_set(vcpu, reg, clr, set) \ + do { \ + u64 hfg; \ + hfg = __vcpu_sys_reg(vcpu, reg) & ~__ ## reg ## _RES0; \ + set |= hfg & __ ## reg ## _MASK; \ + clr |= ~hfg & __ ## reg ## _nMASK; \ + } while(0) - return false; -} -static inline void __activate_traps_hfgxtr(void) +static inline void __activate_traps_hfgxtr(struct kvm_vcpu *vcpu) { + struct kvm_cpu_context *hctxt = &this_cpu_ptr(&kvm_host_data)->host_ctxt; u64 r_clr = 0, w_clr = 0, r_set = 0, w_set = 0, tmp; + u64 r_val, w_val; + + if (!cpus_have_final_cap(ARM64_HAS_FGT)) + return; + + ctxt_sys_reg(hctxt, HFGRTR_EL2) = read_sysreg_s(SYS_HFGRTR_EL2); + ctxt_sys_reg(hctxt, HFGWTR_EL2) = read_sysreg_s(SYS_HFGWTR_EL2); if (cpus_have_final_cap(ARM64_SME)) { tmp = HFGxTR_EL2_nSMPRI_EL1_MASK | HFGxTR_EL2_nTPIDR2_EL0_MASK; @@ -98,26 +104,72 @@ static inline void __activate_traps_hfgxtr(void) if (cpus_have_final_cap(ARM64_WORKAROUND_AMPERE_AC03_CPU_38)) w_set |= HFGxTR_EL2_TCR_EL1_MASK; - sysreg_clear_set_s(SYS_HFGRTR_EL2, r_clr, r_set); - sysreg_clear_set_s(SYS_HFGWTR_EL2, w_clr, w_set); + if (vcpu_has_nv(vcpu) && !is_hyp_ctxt(vcpu)) { + compute_clr_set(vcpu, HFGRTR_EL2, r_clr, r_set); + compute_clr_set(vcpu, HFGWTR_EL2, w_clr, w_set); + } + + /* The default is not to trap anything but ACCDATA_EL1 */ + r_val = __HFGRTR_EL2_nMASK & ~HFGxTR_EL2_nACCDATA_EL1; + r_val |= r_set; + r_val &= ~r_clr; + + w_val = __HFGWTR_EL2_nMASK & ~HFGxTR_EL2_nACCDATA_EL1; + w_val |= w_set; + w_val &= ~w_clr; + + write_sysreg_s(r_val, SYS_HFGRTR_EL2); + write_sysreg_s(w_val, SYS_HFGWTR_EL2); + + if (!vcpu_has_nv(vcpu) || is_hyp_ctxt(vcpu)) + return; + + ctxt_sys_reg(hctxt, HFGITR_EL2) = read_sysreg_s(SYS_HFGITR_EL2); + + r_set = r_clr = 0; + compute_clr_set(vcpu, HFGITR_EL2, r_clr, r_set); + r_val = __HFGITR_EL2_nMASK; + r_val |= r_set; + r_val &= ~r_clr; + + write_sysreg_s(r_val, SYS_HFGITR_EL2); + + ctxt_sys_reg(hctxt, HDFGRTR_EL2) = read_sysreg_s(SYS_HDFGRTR_EL2); + ctxt_sys_reg(hctxt, HDFGWTR_EL2) = read_sysreg_s(SYS_HDFGWTR_EL2); + + r_clr = r_set = w_clr = w_set = 0; + + compute_clr_set(vcpu, HDFGRTR_EL2, r_clr, r_set); + compute_clr_set(vcpu, HDFGWTR_EL2, w_clr, w_set); + + r_val = __HDFGRTR_EL2_nMASK; + r_val |= r_set; + r_val &= ~r_clr; + + w_val = __HDFGWTR_EL2_nMASK; + w_val |= w_set; + w_val &= ~w_clr; + + write_sysreg_s(r_val, SYS_HDFGRTR_EL2); + write_sysreg_s(w_val, SYS_HDFGWTR_EL2); } -static inline void __deactivate_traps_hfgxtr(void) +static inline void __deactivate_traps_hfgxtr(struct kvm_vcpu *vcpu) { - u64 r_clr = 0, w_clr = 0, r_set = 0, w_set = 0, tmp; + struct kvm_cpu_context *hctxt = &this_cpu_ptr(&kvm_host_data)->host_ctxt; - if (cpus_have_final_cap(ARM64_SME)) { - tmp = HFGxTR_EL2_nSMPRI_EL1_MASK | HFGxTR_EL2_nTPIDR2_EL0_MASK; + if (!cpus_have_final_cap(ARM64_HAS_FGT)) + return; - r_set |= tmp; - w_set |= tmp; - } + write_sysreg_s(ctxt_sys_reg(hctxt, HFGRTR_EL2), SYS_HFGRTR_EL2); + write_sysreg_s(ctxt_sys_reg(hctxt, HFGWTR_EL2), SYS_HFGWTR_EL2); - if (cpus_have_final_cap(ARM64_WORKAROUND_AMPERE_AC03_CPU_38)) - w_clr |= HFGxTR_EL2_TCR_EL1_MASK; + if (!vcpu_has_nv(vcpu) || is_hyp_ctxt(vcpu)) + return; - sysreg_clear_set_s(SYS_HFGRTR_EL2, r_clr, r_set); - sysreg_clear_set_s(SYS_HFGWTR_EL2, w_clr, w_set); + write_sysreg_s(ctxt_sys_reg(hctxt, HFGITR_EL2), SYS_HFGITR_EL2); + write_sysreg_s(ctxt_sys_reg(hctxt, HDFGRTR_EL2), SYS_HDFGRTR_EL2); + write_sysreg_s(ctxt_sys_reg(hctxt, HDFGWTR_EL2), SYS_HDFGWTR_EL2); } static inline void __activate_traps_common(struct kvm_vcpu *vcpu) @@ -145,8 +197,21 @@ static inline void __activate_traps_common(struct kvm_vcpu *vcpu) vcpu->arch.mdcr_el2_host = read_sysreg(mdcr_el2); write_sysreg(vcpu->arch.mdcr_el2, mdcr_el2); - if (__hfgxtr_traps_required()) - __activate_traps_hfgxtr(); + if (cpus_have_final_cap(ARM64_HAS_HCX)) { + u64 hcrx = HCRX_GUEST_FLAGS; + if (vcpu_has_nv(vcpu) && !is_hyp_ctxt(vcpu)) { + u64 clr = 0, set = 0; + + compute_clr_set(vcpu, HCRX_EL2, clr, set); + + hcrx |= set; + hcrx &= ~clr; + } + + write_sysreg_s(hcrx, SYS_HCRX_EL2); + } + + __activate_traps_hfgxtr(vcpu); } static inline void __deactivate_traps_common(struct kvm_vcpu *vcpu) @@ -162,8 +227,10 @@ static inline void __deactivate_traps_common(struct kvm_vcpu *vcpu) vcpu_clear_flag(vcpu, PMUSERENR_ON_CPU); } - if (__hfgxtr_traps_required()) - __deactivate_traps_hfgxtr(); + if (cpus_have_final_cap(ARM64_HAS_HCX)) + write_sysreg_s(HCRX_HOST_FLAGS, SYS_HCRX_EL2); + + __deactivate_traps_hfgxtr(vcpu); } static inline void ___activate_traps(struct kvm_vcpu *vcpu) @@ -177,9 +244,6 @@ static inline void ___activate_traps(struct kvm_vcpu *vcpu) if (cpus_have_final_cap(ARM64_HAS_RAS_EXTN) && (hcr & HCR_VSE)) write_sysreg_s(vcpu->arch.vsesr_el2, SYS_VSESR_EL2); - - if (cpus_have_final_cap(ARM64_HAS_HCX)) - write_sysreg_s(HCRX_GUEST_FLAGS, SYS_HCRX_EL2); } static inline void ___deactivate_traps(struct kvm_vcpu *vcpu) @@ -194,9 +258,6 @@ static inline void ___deactivate_traps(struct kvm_vcpu *vcpu) vcpu->arch.hcr_el2 &= ~HCR_VSE; vcpu->arch.hcr_el2 |= read_sysreg(hcr_el2) & HCR_VSE; } - - if (cpus_have_final_cap(ARM64_HAS_HCX)) - write_sysreg_s(HCRX_HOST_FLAGS, SYS_HCRX_EL2); } static inline bool __populate_fault_info(struct kvm_vcpu *vcpu) |