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[Qemu-arm] [PATCH v2 0/6] KVM Guest Debug fixes (plus TCG EL2 debug twea
From: |
Alex Bennée |
Subject: |
[Qemu-arm] [PATCH v2 0/6] KVM Guest Debug fixes (plus TCG EL2 debug tweaks) |
Date: |
Thu, 8 Nov 2018 16:33:23 +0000 |
Hi,
These are fixes for guest debug when running under KVM. While
re-spinning these I came across an anomaly which pointed to a kernel
bug that caused the 1st single-step to fail. This is being discussed
on the kvm-arm list:
Subject: [RFC PATCH] KVM: arm64: don't single-step for non-emulated faults
Date: Wed, 7 Nov 2018 17:10:31 +0000
Message-Id: <address@hidden>
As debugging HYP mode code is next to impossible on real hardware I
tried re-creating the single-step bug under TCG. As a result I ran into
some debug and EL2 cases that failed. The final two patches are some
fixes but I'm still seeing some weird behaviour although it is currently
obscured by timer interrupts constantly firing as I enter the to be
single-stepped guest EL1 instruction so they can probably be skipped for
3.1.
Alex Bennée (6):
target/arm64: properly handle DBGVR RESS bits
target/arm64: hold BQL when calling do_interrupt()
target/arm64: kvm debug set target_el when passing exception to guest
tests/guest-debug: fix scoping of failcount
arm: use symbolic MDCR_TDE in arm_debug_target_el
arm: fix aa64_generate_debug_exceptions to work with EL2
target/arm/cpu.h | 29 ++++++++++++++++++-----------
target/arm/kvm64.c | 20 ++++++++++++++++++--
tests/guest-debug/test-gdbstub.py | 1 +
3 files changed, 37 insertions(+), 13 deletions(-)
--
2.17.1
- [Qemu-arm] [PATCH v2 0/6] KVM Guest Debug fixes (plus TCG EL2 debug tweaks),
Alex Bennée <=
- [Qemu-arm] [PATCH v2 3/6] target/arm64: kvm debug set target_el when passing exception to guest, Alex Bennée, 2018/11/08
- [Qemu-arm] [PATCH v2 2/6] target/arm64: hold BQL when calling do_interrupt(), Alex Bennée, 2018/11/08
- [Qemu-arm] [PATCH v2 4/6] tests/guest-debug: fix scoping of failcount, Alex Bennée, 2018/11/08
- [Qemu-arm] [PATCH v2 5/6] arm: use symbolic MDCR_TDE in arm_debug_target_el, Alex Bennée, 2018/11/08
- [Qemu-arm] [PATCH v2 1/6] target/arm64: properly handle DBGVR RESS bits, Alex Bennée, 2018/11/08