65 lines
1.7 KiB
Diff
65 lines
1.7 KiB
Diff
From c950cda47386360e37a89dfa7029d83e33888a40 Mon Sep 17 00:00:00 2001
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From: Keqian Zhu <zhukeqian1@huawei.com>
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Date: Fri, 10 Apr 2020 13:04:40 +0800
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Subject: [PATCH] accel/kvm: Add pre-park vCPU support
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For that KVM do not support dynamic adjustment of vCPU count,
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we must pre-park all possible vCPU at start.
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Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
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Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
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---
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accel/kvm/kvm-all.c | 23 +++++++++++++++++++++++
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include/sysemu/kvm.h | 1 +
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2 files changed, 24 insertions(+)
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diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
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index 8a98446b7c..f2ce5cd45a 100644
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--- a/accel/kvm/kvm-all.c
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+++ b/accel/kvm/kvm-all.c
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@@ -433,6 +433,29 @@ void kvm_destroy_vcpu(CPUState *cpu)
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}
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}
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+int kvm_create_parked_vcpu(unsigned long vcpu_id)
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+{
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+ KVMState *s = kvm_state;
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+ struct KVMParkedVcpu *vcpu = NULL;
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+ int ret;
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+
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+ DPRINTF("kvm_create_parked_vcpu\n");
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+
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+ ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id);
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+ if (ret < 0) {
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+ DPRINTF("kvm_create_vcpu failed\n");
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+ goto err;
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+ }
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+
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+ vcpu = g_malloc0(sizeof(*vcpu));
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+ vcpu->vcpu_id = vcpu_id;
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+ vcpu->kvm_fd = ret;
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+ QLIST_INSERT_HEAD(&s->kvm_parked_vcpus, vcpu, node);
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+
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+err:
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+ return ret;
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+}
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+
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static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id)
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{
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struct KVMParkedVcpu *cpu;
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diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
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index 7b22aeb6ae..2623775c27 100644
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--- a/include/sysemu/kvm.h
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+++ b/include/sysemu/kvm.h
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@@ -221,6 +221,7 @@ int kvm_has_pit_state2(void);
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int kvm_has_many_ioeventfds(void);
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int kvm_has_gsi_routing(void);
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int kvm_has_intx_set_mask(void);
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+int kvm_create_parked_vcpu(unsigned long vcpu_id);
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/**
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* kvm_arm_supports_user_irq
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--
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2.27.0
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