On 04/02/2022, Jon Doron wrote:
Ping
This patchset adds support for the synthetic debugging device.
HyperV supports a special transport layer for the kernel debugger when
running in HyperV.
This patchset add supports for this device so you could have a setup
fast windows kernel debugging.
At this point of time, DHCP is not implmeneted so to set this up few
things need to be noted.
The scenario I used to test is having 2 VMs in the same virtual network
i.e a Debugger VM with the NIC:
-nic tap,model=virtio,mac=02:ca:01:01:01:01,script=/etc/qemu-ifup
And it's IP is going to be static 192.168.53.12
And the VM we want to debug, to which we need to have the englightments
and vmbus configured:
-cpu
host,hv-relaxed,hv_spinlocks=0x1fff,hv_time,+vmx,invtsc,hv-vapic,hv-vpindex,hv-synic,hv-syndbg
\
-device vmbus-bridge \
-device hv-syndbg,host_ip=192.168.53.12,host_port=50000,use_hcalls=false \
-nic tap,model=virtio,mac=02:ca:01:01:01:02,script=/etc/qemu-ifup \
Then in the debuggee VM we would setup the kernel debugging in the
following way:
If the VM is older than Win8:
* Copy the proper platform kdvm.dll (make sure it's called kdvm.dll even if
platform is 32bit)
bcdedit /set {GUID} dbgtransport kdvm.dll
bcdedit /set {GUID} loadoptions host_ip="1.2.3.4",host_port="50000",nodhcp
bcdedit /set {GUID} debug on
bcdedit /set {GUID} halbreakpoint on
Win8 and late:
bcdedit /dbgsettings net hostip:7.7.7.7 port:50000 nodhcp
This is all the setup that is required to get the synthetic debugger
configured correctly.
Jon Doron (4):
hyperv: SControl is optional to enable SynIc
hyperv: Add definitions for syndbg
hyperv: Add support to process syndbg commands
hw: hyperv: Initial commit for Synthetic Debugging device
docs/hyperv.txt | 15 +
hw/hyperv/Kconfig | 5 +
hw/hyperv/hyperv.c | 475 +++++++++++++++++++++++++------
hw/hyperv/meson.build | 1 +
hw/hyperv/syndbg.c | 407 ++++++++++++++++++++++++++
include/hw/hyperv/hyperv-proto.h | 52 ++++
include/hw/hyperv/hyperv.h | 60 ++++
target/i386/cpu.c | 2 +
target/i386/cpu.h | 7 +
target/i386/kvm/hyperv-proto.h | 37 +++
target/i386/kvm/hyperv-stub.c | 6 +
target/i386/kvm/hyperv.c | 52 +++-
target/i386/kvm/kvm.c | 76 ++++-
13 files changed, 1105 insertions(+), 90 deletions(-)
create mode 100644 hw/hyperv/syndbg.c
--
2.34.1
