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author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2018-02-03 00:26:10 -0700 |
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committer | Ross Zwisler <ross.zwisler@linux.intel.com> | 2018-02-03 00:26:10 -0700 |
commit | d121f07691415df824e6b60520f782f6d13b3c81 (patch) | |
tree | 422ad3cc6fd631604fef4e469e49bacba8202e52 /arch/arm64/kvm/debug.c | |
parent | 59858d3d54cfad1f8db67c2c07e4dd33bb6ed955 (diff) | |
parent | 569d0365f571fa6421a5c80bc30d1b2cdab857fe (diff) | |
download | linux-d121f07691415df824e6b60520f782f6d13b3c81.tar.gz linux-d121f07691415df824e6b60520f782f6d13b3c81.tar.xz |
Merge branch 'for-4.16/dax' into libnvdimm-for-next
Diffstat (limited to 'arch/arm64/kvm/debug.c')
-rw-r--r-- | arch/arm64/kvm/debug.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm64/kvm/debug.c b/arch/arm64/kvm/debug.c index dbadfaf850a7..fa63b28c65e0 100644 --- a/arch/arm64/kvm/debug.c +++ b/arch/arm64/kvm/debug.c @@ -221,3 +221,24 @@ void kvm_arm_clear_debug(struct kvm_vcpu *vcpu) } } } + + +/* + * After successfully emulating an instruction, we might want to + * return to user space with a KVM_EXIT_DEBUG. We can only do this + * once the emulation is complete, though, so for userspace emulations + * we have to wait until we have re-entered KVM before calling this + * helper. + * + * Return true (and set exit_reason) to return to userspace or false + * if no further action is required. + */ +bool kvm_arm_handle_step_debug(struct kvm_vcpu *vcpu, struct kvm_run *run) +{ + if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) { + run->exit_reason = KVM_EXIT_DEBUG; + run->debug.arch.hsr = ESR_ELx_EC_SOFTSTP_LOW << ESR_ELx_EC_SHIFT; + return true; + } + return false; +} |