For emulated GIC capabilities, currently only gicv2 is supported. We need to add gicv3 in when emulated gicv3 ready. For KVM accelerated ARM VM, we detect the capability bits by creating a scratch VM. Signed-off-by: Peter Xu <peterx@redhat.com> Acked-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1458788142-17509-5-git-send-email-peterx@redhat.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/*
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* QEMU monitor.c for ARM.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qmp-commands.h"
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#include "hw/boards.h"
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#include "kvm_arm.h"
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static GICCapability *gic_cap_new(int version)
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{
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GICCapability *cap = g_new0(GICCapability, 1);
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cap->version = version;
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/* by default, support none */
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cap->emulated = false;
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cap->kernel = false;
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return cap;
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}
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static GICCapabilityList *gic_cap_list_add(GICCapabilityList *head,
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GICCapability *cap)
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{
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GICCapabilityList *item = g_new0(GICCapabilityList, 1);
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item->value = cap;
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item->next = head;
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return item;
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}
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static inline void gic_cap_kvm_probe(GICCapability *v2, GICCapability *v3)
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{
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#ifdef CONFIG_KVM
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int fdarray[3];
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if (!kvm_arm_create_scratch_host_vcpu(NULL, fdarray, NULL)) {
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return;
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}
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/* Test KVM GICv2 */
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if (kvm_device_supported(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V2)) {
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v2->kernel = true;
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}
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/* Test KVM GICv3 */
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if (kvm_device_supported(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V3)) {
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v3->kernel = true;
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}
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kvm_arm_destroy_scratch_host_vcpu(fdarray);
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#endif
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}
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GICCapabilityList *qmp_query_gic_capabilities(Error **errp)
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{
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GICCapabilityList *head = NULL;
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GICCapability *v2 = gic_cap_new(2), *v3 = gic_cap_new(3);
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v2->emulated = true;
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/* TODO: we'd change to true after we get emulated GICv3. */
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v3->emulated = false;
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gic_cap_kvm_probe(v2, v3);
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head = gic_cap_list_add(head, v2);
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head = gic_cap_list_add(head, v3);
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return head;
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}
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