With this series applied, we are finally at a level of almost zero
redundancy between QEMU upstream and the qemu-kvm tree. The last major
duplication to be removed is the original io-thread implementation and
everything related to it:
- locking
- vcpu wakeup/kicking as well as suspend/resume
- on-vcpu execution
- io-thread loop
- vcpu thread loop
The approach taken here is similar to what was done to morph KVM core
functions into upstream code: First all to be converted code is moved
over into cpus.c, then qemu-kvm's functions are gradually changed and
replaced with the upstream versions.
This means that we have to enable CONFIG_IOTHREAD which is so far
incompatible with qemu-kvm. This incompatibility causes a temporary
breakage of the TCG mode early in the series, but it is healed again
with the last patch applied.
To make it clear: Even with all this applied, there is still a lot to
do to turn upstream QEMU into the primary KVM platform. We need to
- rework in-kernel IOAPIC/PIC/APIC/PIT support, namely
- proper qdev modeling
- new MSI hooking architecture (half-done)
- VAPIC support (haven't looked at details yet, maybe just cleanups)
- prepare device assignment for upstream (VFIO and/or KVM-based)
- clean up remaining small deltas (including posix-aio-compat...)
- get rid of legacy command line interfaces (e.g. via deprecation
warning in release X and removal in X+n, n >= 1)
But then we are really done and can all retire. ;)
In the meantime, please review/merge these bits.
Jan Kiszka (20):
qemu-kvm: Move thread-related code to cpus.c
qemu-kvm: Enable CONFIG_IOTHREAD
qemu-kvm: Switch to iothread version of qemu_notify_event
qemu-kvm: Use upstream mutex and conds
qemu-kvm: Restrict validity of cpu_single_env
qemu-kvm: Use upstream qemu_mutex_lock/unlock_iothread
qemu-kvm: Clean up kvm_update_interrupt_request
qemu-kvm: Replace kvm_update_interrupt_request with qemu_cpu_kick
qemu-kvm: Use upstream run_on_cpu and flush_queued_work
qemu-kvm: Drop kvm_cond_wait
qemu-kvm: Replace kvm_cpu_is_stopped with cpu_is_stopped
qemu-kvm: Remove obsolete current_env
qemu-kvm: Use upstream vcpu pause/resume
qemu-kvm: Move main loop setup code
qemu-kvm: Use upstream's way of signaling debug stops
qemu-kvm: Use upstream main loop
qemu-kvm: Use upstream main loop initialization
qemu-kvm: Replace kvm_get_thread_id with qemu_get_thread_id
qemu-kvm: Use upstream kvm vcpu initialization
qemu-kvm: Use upstream vcpu loop
configure | 1 +
cpu-defs.h | 11 +-
cpus.c | 17 +--
cpus.h | 1 +
kvm-all.c | 9 +-
qemu-kvm.c | 498 +-------------------------------------------------
qemu-kvm.h | 7 -
target-i386/helper.c | 4 -
vl.c | 17 --
9 files changed, 13 insertions(+), 552 deletions(-)
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