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KVM: arm64: Populate fault info for watchpoint
When handling ESR_ELx_EC_WATCHPT_LOW, far_el2 member of struct
kvm_vcpu_fault_info will be copied to far member of struct
kvm_debug_exit_arch and exposed to the userspace. The userspace will
see stale values from older faults if the fault info does not get
populated.
Fixes: 8fb2046180
("KVM: arm64: Move early handlers to per-EC handlers")
Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230530024651.10014-1-akihiko.odaki@daynix.com
Cc: stable@vger.kernel.org
This commit is contained in:
parent
a9f0e3d5a0
commit
811154e234
3 changed files with 9 additions and 2 deletions
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@ -412,17 +412,21 @@ static bool kvm_hyp_handle_cp15_32(struct kvm_vcpu *vcpu, u64 *exit_code)
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return false;
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}
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static bool kvm_hyp_handle_iabt_low(struct kvm_vcpu *vcpu, u64 *exit_code)
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static bool kvm_hyp_handle_memory_fault(struct kvm_vcpu *vcpu, u64 *exit_code)
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{
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if (!__populate_fault_info(vcpu))
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return true;
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return false;
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}
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static bool kvm_hyp_handle_iabt_low(struct kvm_vcpu *vcpu, u64 *exit_code)
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__alias(kvm_hyp_handle_memory_fault);
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static bool kvm_hyp_handle_watchpt_low(struct kvm_vcpu *vcpu, u64 *exit_code)
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__alias(kvm_hyp_handle_memory_fault);
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static bool kvm_hyp_handle_dabt_low(struct kvm_vcpu *vcpu, u64 *exit_code)
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{
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if (!__populate_fault_info(vcpu))
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if (kvm_hyp_handle_memory_fault(vcpu, exit_code))
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return true;
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if (static_branch_unlikely(&vgic_v2_cpuif_trap)) {
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@ -186,6 +186,7 @@ static const exit_handler_fn hyp_exit_handlers[] = {
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[ESR_ELx_EC_FP_ASIMD] = kvm_hyp_handle_fpsimd,
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[ESR_ELx_EC_IABT_LOW] = kvm_hyp_handle_iabt_low,
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[ESR_ELx_EC_DABT_LOW] = kvm_hyp_handle_dabt_low,
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[ESR_ELx_EC_WATCHPT_LOW] = kvm_hyp_handle_watchpt_low,
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[ESR_ELx_EC_PAC] = kvm_hyp_handle_ptrauth,
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};
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@ -196,6 +197,7 @@ static const exit_handler_fn pvm_exit_handlers[] = {
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[ESR_ELx_EC_FP_ASIMD] = kvm_hyp_handle_fpsimd,
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[ESR_ELx_EC_IABT_LOW] = kvm_hyp_handle_iabt_low,
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[ESR_ELx_EC_DABT_LOW] = kvm_hyp_handle_dabt_low,
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[ESR_ELx_EC_WATCHPT_LOW] = kvm_hyp_handle_watchpt_low,
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[ESR_ELx_EC_PAC] = kvm_hyp_handle_ptrauth,
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};
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@ -110,6 +110,7 @@ static const exit_handler_fn hyp_exit_handlers[] = {
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[ESR_ELx_EC_FP_ASIMD] = kvm_hyp_handle_fpsimd,
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[ESR_ELx_EC_IABT_LOW] = kvm_hyp_handle_iabt_low,
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[ESR_ELx_EC_DABT_LOW] = kvm_hyp_handle_dabt_low,
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[ESR_ELx_EC_WATCHPT_LOW] = kvm_hyp_handle_watchpt_low,
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[ESR_ELx_EC_PAC] = kvm_hyp_handle_ptrauth,
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};
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