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| author |   Jintack Lim <jintack@cs.columbia.edu> | 2017-02-03 10:20:07 -0500 |
|---|---|---|
| committer |   Marc Zyngier <marc.zyngier@arm.com> | 2017-02-08 15:13:36 +0000 |
| commit | c9a3c58f01fb0af78b512ab4515d16f3ef1a03f1 (patch) | |
| tree | 61fdf69d3f5f570f1cc9355be524afc7d6fa9ac8 /arch | |
| parent | KVM: arm/arm64: Set up a background timer for the physical timer emulation (diff) | |
| download | linux-dev-c9a3c58f01fb0af78b512ab4515d16f3ef1a03f1.tar.xz linux-dev-c9a3c58f01fb0af78b512ab4515d16f3ef1a03f1.zip | |
KVM: arm64: Add the EL1 physical timer access handler
KVM traps on the EL1 phys timer accesses from VMs, but it doesn't handle
those traps. This results in terminating VMs. Instead, set a handler for
the EL1 phys timer access, and inject an undefined exception as an
intermediate step.
Signed-off-by: Jintack Lim <jintack@cs.columbia.edu>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index caa47ce7e006..1cd3464ff88d 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -820,6 +820,30 @@ static bool access_pmuserenr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, CRm((0b1100 | (((n) >> 3) & 0x3))), Op2(((n) & 0x7)), \ access_pmu_evtyper, reset_unknown, (PMEVTYPER0_EL0 + n), } +static bool access_cntp_tval(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + kvm_inject_undefined(vcpu); + return true; +} + +static bool access_cntp_ctl(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + kvm_inject_undefined(vcpu); + return true; +} + +static bool access_cntp_cval(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + kvm_inject_undefined(vcpu); + return true; +} + /* * Architected system registers. * Important: Must be sorted ascending by Op0, Op1, CRn, CRm, Op2 @@ -1029,6 +1053,16 @@ static const struct sys_reg_desc sys_reg_descs[] = { { Op0(0b11), Op1(0b011), CRn(0b1101), CRm(0b0000), Op2(0b011), NULL, reset_unknown, TPIDRRO_EL0 }, + /* CNTP_TVAL_EL0 */ + { Op0(0b11), Op1(0b011), CRn(0b1110), CRm(0b0010), Op2(0b000), + access_cntp_tval }, + /* CNTP_CTL_EL0 */ + { Op0(0b11), Op1(0b011), CRn(0b1110), CRm(0b0010), Op2(0b001), + access_cntp_ctl }, + /* CNTP_CVAL_EL0 */ + { Op0(0b11), Op1(0b011), CRn(0b1110), CRm(0b0010), Op2(0b010), + access_cntp_cval }, + /* PMEVCNTRn_EL0 */ PMU_PMEVCNTR_EL0(0), PMU_PMEVCNTR_EL0(1), |