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| author | Marc Zyngier <maz@kernel.org> | 2024-10-23 17:53:39 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2024-10-31 05:44:22 +0300 |
| commit | 5970e9903f03560ce9829297e302463acdc26bc0 (patch) | |
| tree | d21d877b304105c5b7aea591083b99453ceba1ff | |
| parent | 26e89dccdf6328b608baa35d84cc36d915769f50 (diff) | |
| download | linux-5970e9903f03560ce9829297e302463acdc26bc0.tar.xz | |
KVM: arm64: Add basic support for POR_EL2
S1POE support implies support for POR_EL2, which we provide by
- adding it to the vcpu_sysreg enum
- advertising it as mapped to its EL1 counterpart in get_el2_to_el1_mapping
- wiring it in the sys_reg_desc table with the correct visibility
- handling POR_EL1 in __vcpu_{read,write}_sys_reg_from_cpu()
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20241023145345.1613824-32-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 3 | ||||
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 9 |
2 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 9269d893f85b..28ea7e72477c 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -480,6 +480,7 @@ enum vcpu_sysreg { TCR_EL2, /* Translation Control Register (EL2) */ PIRE0_EL2, /* Permission Indirection Register 0 (EL2) */ PIR_EL2, /* Permission Indirection Register 1 (EL2) */ + POR_EL2, /* Permission Overlay Register 2 (EL2) */ SPSR_EL2, /* EL2 saved program status register */ ELR_EL2, /* EL2 exception link register */ AFSR0_EL2, /* Auxiliary Fault Status Register 0 (EL2) */ @@ -1050,6 +1051,7 @@ static inline bool __vcpu_read_sys_reg_from_cpu(int reg, u64 *val) case TCR2_EL1: *val = read_sysreg_s(SYS_TCR2_EL12); break; case PIR_EL1: *val = read_sysreg_s(SYS_PIR_EL12); break; case PIRE0_EL1: *val = read_sysreg_s(SYS_PIRE0_EL12); break; + case POR_EL1: *val = read_sysreg_s(SYS_POR_EL12); break; case ESR_EL1: *val = read_sysreg_s(SYS_ESR_EL12); break; case AFSR0_EL1: *val = read_sysreg_s(SYS_AFSR0_EL12); break; case AFSR1_EL1: *val = read_sysreg_s(SYS_AFSR1_EL12); break; @@ -1099,6 +1101,7 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg) case TCR2_EL1: write_sysreg_s(val, SYS_TCR2_EL12); break; case PIR_EL1: write_sysreg_s(val, SYS_PIR_EL12); break; case PIRE0_EL1: write_sysreg_s(val, SYS_PIRE0_EL12); break; + case POR_EL1: write_sysreg_s(val, SYS_POR_EL12); break; case ESR_EL1: write_sysreg_s(val, SYS_ESR_EL12); break; case AFSR0_EL1: write_sysreg_s(val, SYS_AFSR0_EL12); break; case AFSR1_EL1: write_sysreg_s(val, SYS_AFSR1_EL12); break; diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index d46663f27fba..4f4fe84fb0e8 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -137,6 +137,7 @@ static bool get_el2_to_el1_mapping(unsigned int reg, MAPPED_EL2_SYSREG(TCR2_EL2, TCR2_EL1, NULL ); MAPPED_EL2_SYSREG(PIR_EL2, PIR_EL1, NULL ); MAPPED_EL2_SYSREG(PIRE0_EL2, PIRE0_EL1, NULL ); + MAPPED_EL2_SYSREG(POR_EL2, POR_EL1, NULL ); MAPPED_EL2_SYSREG(AMAIR_EL2, AMAIR_EL1, NULL ); MAPPED_EL2_SYSREG(ELR_EL2, ELR_EL1, NULL ); MAPPED_EL2_SYSREG(SPSR_EL2, SPSR_EL1, NULL ); @@ -2329,6 +2330,12 @@ static unsigned int s1poe_visibility(const struct kvm_vcpu *vcpu, return REG_HIDDEN; } +static unsigned int s1poe_el2_visibility(const struct kvm_vcpu *vcpu, + const struct sys_reg_desc *rd) +{ + return __el2_visibility(vcpu, rd, s1poe_visibility); +} + static unsigned int tcr2_visibility(const struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd) { @@ -2942,6 +2949,8 @@ static const struct sys_reg_desc sys_reg_descs[] = { s1pie_el2_visibility), EL2_REG_FILTERED(PIR_EL2, access_rw, reset_val, 0, s1pie_el2_visibility), + EL2_REG_FILTERED(POR_EL2, access_rw, reset_val, 0, + s1poe_el2_visibility), EL2_REG(AMAIR_EL2, access_rw, reset_val, 0), EL2_REG(VBAR_EL2, access_rw, reset_val, 0), |