diff options
| author | Marc Zyngier <maz@kernel.org> | 2024-10-23 17:53:41 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2024-10-31 05:44:22 +0300 |
| commit | 846c993df98278ce18b80183d78b5c1ca8b14f5c (patch) | |
| tree | daa8fd69cb974021d5285478f1843a7f08386209 /arch | |
| parent | de5c2827fb44ae3074638e373bcea64ac9107689 (diff) | |
| download | linux-846c993df98278ce18b80183d78b5c1ca8b14f5c.tar.xz | |
KVM: arm64: Add POE save/restore for AT emulation fast-path
Just like the other extensions affecting address translation,
we must save/restore POE so that an out-of-context translation
context can be restored and used with the AT instructions.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Link: https://lore.kernel.org/r/20241023145345.1613824-34-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/kvm/at.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm64/kvm/at.c b/arch/arm64/kvm/at.c index de7109111e40..ef1643faedeb 100644 --- a/arch/arm64/kvm/at.c +++ b/arch/arm64/kvm/at.c @@ -440,6 +440,8 @@ struct mmu_config { u64 tcr2; u64 pir; u64 pire0; + u64 por_el0; + u64 por_el1; u64 sctlr; u64 vttbr; u64 vtcr; @@ -458,6 +460,10 @@ static void __mmu_config_save(struct mmu_config *config) config->pir = read_sysreg_el1(SYS_PIR); config->pire0 = read_sysreg_el1(SYS_PIRE0); } + if (system_supports_poe()) { + config->por_el1 = read_sysreg_el1(SYS_POR); + config->por_el0 = read_sysreg_s(SYS_POR_EL0); + } } config->sctlr = read_sysreg_el1(SYS_SCTLR); config->vttbr = read_sysreg(vttbr_el2); @@ -485,6 +491,10 @@ static void __mmu_config_restore(struct mmu_config *config) write_sysreg_el1(config->pir, SYS_PIR); write_sysreg_el1(config->pire0, SYS_PIRE0); } + if (system_supports_poe()) { + write_sysreg_el1(config->por_el1, SYS_POR); + write_sysreg_s(config->por_el0, SYS_POR_EL0); + } } write_sysreg_el1(config->sctlr, SYS_SCTLR); write_sysreg(config->vttbr, vttbr_el2); @@ -1105,6 +1115,10 @@ static u64 __kvm_at_s1e01_fast(struct kvm_vcpu *vcpu, u32 op, u64 vaddr) write_sysreg_el1(vcpu_read_sys_reg(vcpu, PIR_EL1), SYS_PIR); write_sysreg_el1(vcpu_read_sys_reg(vcpu, PIRE0_EL1), SYS_PIRE0); } + if (kvm_has_s1poe(vcpu->kvm)) { + write_sysreg_el1(vcpu_read_sys_reg(vcpu, POR_EL1), SYS_POR); + write_sysreg_s(vcpu_read_sys_reg(vcpu, POR_EL0), SYS_POR_EL0); + } } write_sysreg_el1(vcpu_read_sys_reg(vcpu, SCTLR_EL1), SYS_SCTLR); __load_stage2(mmu, mmu->arch); |