diff options
| author | Akihiko Odaki <akihiko.odaki@daynix.com> | 2023-05-30 11:46:51 +0900 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2023-05-30 08:39:07 +0100 |
| commit | 811154e234db72f0a11557a84ba9640f8b3bc823 (patch) | |
| tree | 0894451f697416d7541464c0fe646e3038852819 /arch | |
| parent | a9f0e3d5a089d0844abb679a5e99f15010d53e25 (diff) | |
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: 8fb2046180a0 ("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
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/kvm/hyp/include/hyp/switch.h | 8 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/switch.c | 2 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp/vhe/switch.c | 1 |
3 files changed, 9 insertions, 2 deletions
diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h index e78a08a72a3c..5c15c58f90cc 100644 --- a/arch/arm64/kvm/hyp/include/hyp/switch.h +++ b/arch/arm64/kvm/hyp/include/hyp/switch.h @@ -412,17 +412,21 @@ static bool kvm_hyp_handle_cp15_32(struct kvm_vcpu *vcpu, u64 *exit_code) return false; } -static bool kvm_hyp_handle_iabt_low(struct kvm_vcpu *vcpu, u64 *exit_code) +static bool kvm_hyp_handle_memory_fault(struct kvm_vcpu *vcpu, u64 *exit_code) { if (!__populate_fault_info(vcpu)) return true; return false; } +static bool kvm_hyp_handle_iabt_low(struct kvm_vcpu *vcpu, u64 *exit_code) + __alias(kvm_hyp_handle_memory_fault); +static bool kvm_hyp_handle_watchpt_low(struct kvm_vcpu *vcpu, u64 *exit_code) + __alias(kvm_hyp_handle_memory_fault); static bool kvm_hyp_handle_dabt_low(struct kvm_vcpu *vcpu, u64 *exit_code) { - if (!__populate_fault_info(vcpu)) + if (kvm_hyp_handle_memory_fault(vcpu, exit_code)) return true; if (static_branch_unlikely(&vgic_v2_cpuif_trap)) { diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/switch.c index 71fa16a0dc77..77791495c995 100644 --- a/arch/arm64/kvm/hyp/nvhe/switch.c +++ b/arch/arm64/kvm/hyp/nvhe/switch.c @@ -186,6 +186,7 @@ static const exit_handler_fn hyp_exit_handlers[] = { [ESR_ELx_EC_FP_ASIMD] = kvm_hyp_handle_fpsimd, [ESR_ELx_EC_IABT_LOW] = kvm_hyp_handle_iabt_low, [ESR_ELx_EC_DABT_LOW] = kvm_hyp_handle_dabt_low, + [ESR_ELx_EC_WATCHPT_LOW] = kvm_hyp_handle_watchpt_low, [ESR_ELx_EC_PAC] = kvm_hyp_handle_ptrauth, }; @@ -196,6 +197,7 @@ static const exit_handler_fn pvm_exit_handlers[] = { [ESR_ELx_EC_FP_ASIMD] = kvm_hyp_handle_fpsimd, [ESR_ELx_EC_IABT_LOW] = kvm_hyp_handle_iabt_low, [ESR_ELx_EC_DABT_LOW] = kvm_hyp_handle_dabt_low, + [ESR_ELx_EC_WATCHPT_LOW] = kvm_hyp_handle_watchpt_low, [ESR_ELx_EC_PAC] = kvm_hyp_handle_ptrauth, }; diff --git a/arch/arm64/kvm/hyp/vhe/switch.c b/arch/arm64/kvm/hyp/vhe/switch.c index 3d868e84c7a0..7a1aa511e7da 100644 --- a/arch/arm64/kvm/hyp/vhe/switch.c +++ b/arch/arm64/kvm/hyp/vhe/switch.c @@ -110,6 +110,7 @@ static const exit_handler_fn hyp_exit_handlers[] = { [ESR_ELx_EC_FP_ASIMD] = kvm_hyp_handle_fpsimd, [ESR_ELx_EC_IABT_LOW] = kvm_hyp_handle_iabt_low, [ESR_ELx_EC_DABT_LOW] = kvm_hyp_handle_dabt_low, + [ESR_ELx_EC_WATCHPT_LOW] = kvm_hyp_handle_watchpt_low, [ESR_ELx_EC_PAC] = kvm_hyp_handle_ptrauth, }; |