Messages in this thread | | | Subject | Re: [PATCH] KVM: X86: Also reload the debug registers before kvm_x86->run() when the host is using them | From | Paolo Bonzini <> | Date | Fri, 9 Jul 2021 18:58:52 +0200 |
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On 09/07/21 18:35, Jim Mattson wrote: >>>> Just what you said, it's not easy and the needs are limited. I >>>> implemented kvm_vcpu_check_breakpoint because I was interested in >>>> using hardware breakpoints from gdb, even with unrestricted_guest=0 >>>> and invalid guest state, but that's it. >>> It seems kvm_vcpu_check_breakpoint() handles only for code breakpoint >>> and doesn't handle for data breakpoints. >> Correct, there's a comment above the call. But data breakpoint are much >> harder and relatively less useful. > > Data breakpoints are actually quite useful. I/O breakpoints not so much.
Normally yes; much less for the specific case of debugging invalid-guest-state or other invocations of the emulator.
Paolo
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