1c823f0431
This series is an attempt to provide CPU hotplug support on ARM virt platform. This is based on ACPI GED device. We should enable ACPI support, and use vGICv3 and 64bit CPU to support CPU hotplug. Under KVM accel, the KVM vCPUs is pre-created. Besides, vGIC IRIs is pre-created too. However, QEMU vCPU objects are defer-created. Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
64 lines
1.7 KiB
Diff
64 lines
1.7 KiB
Diff
From 135119d2e82e99adc67346572c761fbe54d73e4a 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 f450f25295..84edbe8bb1 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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@@ -339,6 +339,29 @@ err:
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return ret;
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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 acd90aebb6..565adb4e2c 100644
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--- a/include/sysemu/kvm.h
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+++ b/include/sysemu/kvm.h
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@@ -216,6 +216,7 @@ 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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int kvm_init_vcpu(CPUState *cpu);
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int kvm_cpu_exec(CPUState *cpu);
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int kvm_destroy_vcpu(CPUState *cpu);
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--
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2.19.1
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