[RFC PATCH v11 12/29] KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory
Xiaoyao Li
xiaoyao.li at intel.com
Fri Jul 21 08:42:04 PDT 2023
On 7/21/2023 11:05 PM, Xiaoyao Li wrote:
> On 7/19/2023 7:44 AM, Sean Christopherson wrote:
>> @@ -6255,12 +6298,17 @@ int kvm_init(unsigned vcpu_size, unsigned
>> vcpu_align, struct module *module)
>> if (r)
>> goto err_async_pf;
>> + r = kvm_gmem_init();
>> + if (r)
>> + goto err_gmem;
>> +
>> kvm_chardev_ops.owner = module;
>> kvm_preempt_ops.sched_in = kvm_sched_in;
>> kvm_preempt_ops.sched_out = kvm_sched_out;
>> kvm_init_debug();
>> + kvm_gmem_init();
>
> why kvm_gmem_init() needs to be called again? by mistake?
I'm sure it's a mistake.
I'm testing the gmem QEMU with this series. SW_PROTECTED_VM gets stuck
in a loop in early OVMF code due to two shared page of OVMF get zapped
and re-mapped infinitely. Removing the second call of kvm_gmem_init()
can solve the issue, though I'm not sure about the reason.
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