diff options
| author | Joao Martins <joao.m.martins@oracle.com> | 2022-03-03 15:41:20 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-04-02 05:41:15 -0400 |
| commit | 0ec6c5c5bb6585320a2e51a316c2fd381fdec836 (patch) | |
| tree | 3597adfee974f5d8e4346f1e83d66ebb310369ed /arch/x86/kvm/xen.c | |
| parent | 2fd6df2f2b47d4301b1ee0fe9d627d1c061a5988 (diff) | |
| download | linux-0ec6c5c5bb6585320a2e51a316c2fd381fdec836.tar.gz | |
KVM: x86/xen: handle PV IPI vcpu yield
Cooperative Linux guests after an IPI-many may yield vcpu if
any of the IPI'd vcpus were preempted (i.e. runstate is 'runnable'.)
Support SCHEDOP_yield for handling yield.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20220303154127.202856-11-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/xen.c')
| -rw-r--r-- | arch/x86/kvm/xen.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c index 3d95167028ba..0dae583c4a1d 100644 --- a/arch/x86/kvm/xen.c +++ b/arch/x86/kvm/xen.c @@ -19,6 +19,7 @@ #include <xen/interface/xen.h> #include <xen/interface/vcpu.h> #include <xen/interface/event_channel.h> +#include <xen/interface/sched.h> #include "trace.h" @@ -798,6 +799,20 @@ static int kvm_xen_hypercall_complete_userspace(struct kvm_vcpu *vcpu) return kvm_xen_hypercall_set_result(vcpu, run->xen.u.hcall.result); } +static bool kvm_xen_hcall_sched_op(struct kvm_vcpu *vcpu, int cmd, u64 param, u64 *r) +{ + switch (cmd) { + case SCHEDOP_yield: + kvm_vcpu_on_spin(vcpu, true); + *r = 0; + return true; + default: + break; + } + + return false; +} + int kvm_xen_hypercall(struct kvm_vcpu *vcpu) { bool longmode; @@ -838,7 +853,9 @@ int kvm_xen_hypercall(struct kvm_vcpu *vcpu) if (params[0] == EVTCHNOP_send) handled = kvm_xen_hcall_evtchn_send(vcpu, params[1], &r); break; - + case __HYPERVISOR_sched_op: + handled = kvm_xen_hcall_sched_op(vcpu, params[0], params[1], &r); + break; default: break; } |