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| author | Marc Zyngier <maz@kernel.org> | 2024-10-23 17:53:19 +0300 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2024-10-31 05:42:30 +0300 |
| commit | 69c19e047dfee63f3e5b06b4ad288bbad32fe8f0 (patch) | |
| tree | c0d6cb957a73a4d4a08aae40caf7e93eddc0f274 | |
| parent | 9ae424d2a1ae144c83ffd7c9e2f408ae5acfb634 (diff) | |
| download | linux-69c19e047dfee63f3e5b06b4ad288bbad32fe8f0.tar.xz | |
KVM: arm64: Add TCR2_EL2 to the sysreg arrays
Add the TCR2_EL2 register to the per-vcpu sysreg register array,
the sysreg descriptor array, and advertise it as mapped to TCR2_EL1
for NV purposes.
Access to this register is conditional based on ID_AA64MMFR3_EL1.TCRX
being advertised.
Reviewed-by: Joey Gouly <joey.gouly@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20241023145345.1613824-12-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 1 | ||||
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 14 |
2 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index c753ab31dcea..b41de132fa4e 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -499,6 +499,7 @@ enum vcpu_sysreg { /* Anything from this can be RES0/RES1 sanitised */ MARKER(__SANITISED_REG_START__), + TCR2_EL2, /* Extended Translation Control Register (EL2) */ /* Any VNCR-capable reg goes after this point */ MARKER(__VNCR_START__), diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 9115a75b2c61..a435b78606c0 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -134,6 +134,7 @@ static bool get_el2_to_el1_mapping(unsigned int reg, MAPPED_EL2_SYSREG(ESR_EL2, ESR_EL1, NULL ); MAPPED_EL2_SYSREG(FAR_EL2, FAR_EL1, NULL ); MAPPED_EL2_SYSREG(MAIR_EL2, MAIR_EL1, NULL ); + MAPPED_EL2_SYSREG(TCR2_EL2, TCR2_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 ); @@ -452,6 +453,18 @@ static bool access_vm_reg(struct kvm_vcpu *vcpu, return true; } +static bool access_tcr2_el2(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + if (!kvm_has_feat(vcpu->kvm, ID_AA64MMFR3_EL1, TCRX, IMP)) { + kvm_inject_undefined(vcpu); + return false; + } + + return access_rw(vcpu, p, r); +} + static bool access_actlr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, const struct sys_reg_desc *r) @@ -2866,6 +2879,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { EL2_REG(TTBR0_EL2, access_rw, reset_val, 0), EL2_REG(TTBR1_EL2, access_rw, reset_val, 0), EL2_REG(TCR_EL2, access_rw, reset_val, TCR_EL2_RES1), + EL2_REG(TCR2_EL2, access_tcr2_el2, reset_val, TCR2_EL2_RES1), EL2_REG_VNCR(VTTBR_EL2, reset_val, 0), EL2_REG_VNCR(VTCR_EL2, reset_val, 0), |