| Message ID | 1539284855-4035-3-git-send-email-gengdongjiu@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | rename function name and enable 32bit vcpu events | expand |
Hi Dongjiu Geng, On 11/10/2018 20:07, Dongjiu Geng wrote: > The commit 539aee0edb9f ("KVM: arm64: Share the parts of > get/set events useful to 32bit") shares the get/set events > helper for arm64 and arm32, Oops. I evidently didn't test this bit. Looks like I just depended on the symbol to be defined, I didn't check the CAP was exposed. > it is better also share the check > for vcpu events capability to enable 32 bit kvm vcpu events > support. not just better, necessary for correctly-written user-space to know the feature is supported. This last bit would be clearer as: "but forgot to share the cap extension code." Thanks for catching this! Acked-by: James Morse <james.morse@arm.com> Thanks, James
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index fd37c53..e50245e 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -82,7 +82,6 @@ int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext) break; case KVM_CAP_SET_GUEST_DEBUG: case KVM_CAP_VCPU_ATTRIBUTES: - case KVM_CAP_VCPU_EVENTS: r = 1; break; default: diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index 40e79ea..64e5d97 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -212,6 +212,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_READONLY_MEM: case KVM_CAP_MP_STATE: case KVM_CAP_IMMEDIATE_EXIT: + case KVM_CAP_VCPU_EVENTS: r = 1; break; case KVM_CAP_ARM_SET_DEVICE_ADDR:
The commit 539aee0edb9f ("KVM: arm64: Share the parts of get/set events useful to 32bit") shares the get/set events helper for arm64 and arm32, it is better also share the check for vcpu events capability to enable 32 bit kvm vcpu events support. User space will check whether KVM supports vcpu events by checking the KVM_CAP_VCPU_EVENTS extension Cc: James Morse <james.morse@arm.com> Reviewed-by : Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com> --- For the 32 bits kvm migration, it needs to enable the vcpu events, this patch will enable it. The user space QEMU patch is here: https://patchwork.ozlabs.org/patch/975615/ --- arch/arm64/kvm/reset.c | 1 - virt/kvm/arm/arm.c | 1 + 2 files changed, 1 insertion(+), 1 deletion(-)