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| author | David Woodhouse <dwmw@amazon.co.uk> | 2022-12-16 14:02:29 +0000 |
|---|---|---|
| committer | David Woodhouse <dwmw@amazon.co.uk> | 2023-03-01 08:22:50 +0000 |
| commit | 91cce756179195f0725f551a5b2922ae2abbef9f (patch) | |
| tree | 623f24610e50c57c93612492256f322e8a74e1a2 /target/i386 | |
| parent | 5dbcd01a8dfa4601dd3ce2cab2c4aa3654f1114d (diff) | |
| download | qemu-91cce756179195f0725f551a5b2922ae2abbef9f.zip qemu-91cce756179195f0725f551a5b2922ae2abbef9f.tar.gz qemu-91cce756179195f0725f551a5b2922ae2abbef9f.tar.bz2 | |
hw/xen: Add xen_evtchn device for event channel emulation
Include basic support for setting HVM_PARAM_CALLBACK_IRQ to the global
vector method HVM_PARAM_CALLBACK_TYPE_VECTOR, which is handled in-kernel
by raising the vector whenever the vCPU's vcpu_info->evtchn_upcall_pending
flag is set.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
Diffstat (limited to 'target/i386')
| -rw-r--r-- | target/i386/kvm/xen-emu.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index ce858ac..435c51f 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -22,6 +22,7 @@ #include "sysemu/runstate.h" #include "hw/i386/kvm/xen_overlay.h" +#include "hw/i386/kvm/xen_evtchn.h" #include "hw/xen/interface/version.h" #include "hw/xen/interface/sched.h" @@ -510,6 +511,10 @@ static bool handle_set_param(struct kvm_xen_exit *exit, X86CPU *cpu, } switch (hp.index) { + case HVM_PARAM_CALLBACK_IRQ: + err = xen_evtchn_set_callback_param(hp.value); + xen_set_long_mode(exit->u.hcall.longmode); + break; default: return false; } @@ -719,6 +724,16 @@ int kvm_xen_soft_reset(void) trace_kvm_xen_soft_reset(); + /* + * Zero is the reset/startup state for HVM_PARAM_CALLBACK_IRQ. Strictly, + * it maps to HVM_PARAM_CALLBACK_TYPE_GSI with GSI#0, but Xen refuses to + * to deliver to the timer interrupt and treats that as 'disabled'. + */ + err = xen_evtchn_set_callback_param(0); + if (err) { + return err; + } + CPU_FOREACH(cpu) { async_run_on_cpu(cpu, do_vcpu_soft_reset, RUN_ON_CPU_NULL); } |