diff options
| -rw-r--r-- | arch/arm64/include/asm/cpufeature.h | 2 | ||||
| -rw-r--r-- | arch/arm64/include/asm/kvm_arm.h | 1 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/include/hyp/switch.h | 31 | ||||
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 14 |
4 files changed, 47 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index 352aa6b93964..93fe8e6beb64 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -845,7 +845,7 @@ static inline bool system_supports_poe(void) alternative_has_cap_unlikely(ARM64_HAS_S1POE); } -static inline bool system_supports_mpam(void) +static __always_inline bool system_supports_mpam(void) { return alternative_has_cap_unlikely(ARM64_MPAM); } diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 109a85ee6910..16afb7a79b15 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -103,6 +103,7 @@ #define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H) #define HCRX_HOST_FLAGS (HCRX_EL2_MSCEn | HCRX_EL2_TCR2En | HCRX_EL2_EnFPM) +#define MPAMHCR_HOST_FLAGS 0 /* TCR_EL2 Registers bits */ #define TCR_EL2_DS (1UL << 32) diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h index 5310fe1da616..34f53707892d 100644 --- a/arch/arm64/kvm/hyp/include/hyp/switch.h +++ b/arch/arm64/kvm/hyp/include/hyp/switch.h @@ -204,6 +204,35 @@ static inline void __deactivate_traps_hfgxtr(struct kvm_vcpu *vcpu) __deactivate_fgt(hctxt, vcpu, kvm, HAFGRTR_EL2); } +static inline void __activate_traps_mpam(struct kvm_vcpu *vcpu) +{ + u64 r = MPAM2_EL2_TRAPMPAM0EL1 | MPAM2_EL2_TRAPMPAM1EL1; + + if (!system_supports_mpam()) + return; + + /* trap guest access to MPAMIDR_EL1 */ + if (system_supports_mpam_hcr()) { + write_sysreg_s(MPAMHCR_EL2_TRAP_MPAMIDR_EL1, SYS_MPAMHCR_EL2); + } else { + /* From v1.1 TIDR can trap MPAMIDR, set it unconditionally */ + r |= MPAM2_EL2_TIDR; + } + + write_sysreg_s(r, SYS_MPAM2_EL2); +} + +static inline void __deactivate_traps_mpam(void) +{ + if (!system_supports_mpam()) + return; + + write_sysreg_s(0, SYS_MPAM2_EL2); + + if (system_supports_mpam_hcr()) + write_sysreg_s(MPAMHCR_HOST_FLAGS, SYS_MPAMHCR_EL2); +} + static inline void __activate_traps_common(struct kvm_vcpu *vcpu) { /* Trap on AArch32 cp15 c15 (impdef sysregs) accesses (EL1 or EL0) */ @@ -244,6 +273,7 @@ static inline void __activate_traps_common(struct kvm_vcpu *vcpu) } __activate_traps_hfgxtr(vcpu); + __activate_traps_mpam(vcpu); } static inline void __deactivate_traps_common(struct kvm_vcpu *vcpu) @@ -263,6 +293,7 @@ static inline void __deactivate_traps_common(struct kvm_vcpu *vcpu) write_sysreg_s(HCRX_HOST_FLAGS, SYS_HCRX_EL2); __deactivate_traps_hfgxtr(vcpu); + __deactivate_traps_mpam(); } static inline void ___activate_traps(struct kvm_vcpu *vcpu, u64 hcr) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index ff8c4e1b847e..66d6af1dbadc 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2553,8 +2553,11 @@ static const struct sys_reg_desc sys_reg_descs[] = { { SYS_DESC(SYS_LOREA_EL1), trap_loregion }, { SYS_DESC(SYS_LORN_EL1), trap_loregion }, { SYS_DESC(SYS_LORC_EL1), trap_loregion }, + { SYS_DESC(SYS_MPAMIDR_EL1), undef_access }, { SYS_DESC(SYS_LORID_EL1), trap_loregion }, + { SYS_DESC(SYS_MPAM1_EL1), undef_access }, + { SYS_DESC(SYS_MPAM0_EL1), undef_access }, { SYS_DESC(SYS_VBAR_EL1), access_rw, reset_val, VBAR_EL1, 0 }, { SYS_DESC(SYS_DISR_EL1), NULL, reset_val, DISR_EL1, 0 }, @@ -2854,6 +2857,17 @@ static const struct sys_reg_desc sys_reg_descs[] = { EL2_REG(MAIR_EL2, access_rw, reset_val, 0), EL2_REG(AMAIR_EL2, access_rw, reset_val, 0), + { SYS_DESC(SYS_MPAMHCR_EL2), undef_access }, + { SYS_DESC(SYS_MPAMVPMV_EL2), undef_access }, + { SYS_DESC(SYS_MPAM2_EL2), undef_access }, + { SYS_DESC(SYS_MPAMVPM0_EL2), undef_access }, + { SYS_DESC(SYS_MPAMVPM1_EL2), undef_access }, + { SYS_DESC(SYS_MPAMVPM2_EL2), undef_access }, + { SYS_DESC(SYS_MPAMVPM3_EL2), undef_access }, + { SYS_DESC(SYS_MPAMVPM4_EL2), undef_access }, + { SYS_DESC(SYS_MPAMVPM5_EL2), undef_access }, + { SYS_DESC(SYS_MPAMVPM6_EL2), undef_access }, + { SYS_DESC(SYS_MPAMVPM7_EL2), undef_access }, EL2_REG(VBAR_EL2, access_rw, reset_val, 0), EL2_REG(RVBAR_EL2, access_rw, reset_val, 0), |