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Groups > linux.kernel > #1705266
| From | "Longpeng (Mike)" <longpeng2@huawei.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 3/3] KVM: implement spinlock optimization logic for arm/s390 |
| Date | 2017-08-07 11:00 +0200 |
| Message-ID | <ubM3f-5YJ-9@gated-at.bofh.it> (permalink) |
| References | <ubLTz-5V4-11@gated-at.bofh.it> <ubLTB-5V4-35@gated-at.bofh.it> <ubM3f-5YJ-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 2017/8/7 16:52, David Hildenbrand wrote:
> On 07.08.2017 10:44, Longpeng(Mike) wrote:
>> Implements the kvm_arch_vcpu_spin/preempt_in_kernel() for arm/s390,
>> they needn't cache the result.
>>
>> Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com>
>> ---
>> arch/s390/kvm/kvm-s390.c | 4 ++--
>> virt/kvm/arm/arm.c | 4 ++--
>> 2 files changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
>> index f78cdc2..49b9178 100644
>> --- a/arch/s390/kvm/kvm-s390.c
>> +++ b/arch/s390/kvm/kvm-s390.c
>> @@ -2449,12 +2449,12 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
>>
>> bool kvm_arch_vcpu_spin_in_kernel(struct kvm_vcpu *vcpu)
>> {
>> - return false;
>> + return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE);
>> }
>>
>> bool kvm_arch_vcpu_preempt_in_kernel(struct kvm_vcpu *vcpu)
>> {
>> - return false;
>> + return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE);
>> }
>>
>> void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu)
>> diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
>> index e45f780..956f025 100644
>> --- a/virt/kvm/arm/arm.c
>> +++ b/virt/kvm/arm/arm.c
>> @@ -418,12 +418,12 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
>>
>> bool kvm_arch_vcpu_spin_in_kernel(struct kvm_vcpu *vcpu)
>> {
>> - return false;
>> + return vcpu_mode_priv(vcpu);
>> }
>>
>> bool kvm_arch_vcpu_preempt_in_kernel(struct kvm_vcpu *vcpu)
>> {
>> - return false;
>> + return vcpu_mode_priv(vcpu);
>> }
>>
>> /* Just ensure a guest exit from a particular CPU */
>>
>
> Can you split that into two parts? (arm and s390x?)
OK, I'll split in V2. :)
>
--
Regards,
Longpeng(Mike)
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[PATCH 0/3] KVM: optimize the kvm_vcpu_on_spin "Longpeng(Mike)" <longpeng2@huawei.com> - 2017-08-07 10:50 +0200
[PATCH 3/3] KVM: implement spinlock optimization logic for arm/s390 "Longpeng(Mike)" <longpeng2@huawei.com> - 2017-08-07 10:50 +0200
Re: [PATCH 3/3] KVM: implement spinlock optimization logic for arm/s390 David Hildenbrand <david@redhat.com> - 2017-08-07 11:00 +0200
Re: [PATCH 3/3] KVM: implement spinlock optimization logic for arm/s390 "Longpeng (Mike)" <longpeng2@huawei.com> - 2017-08-07 11:00 +0200
[PATCH 1/3] KVM: add spinlock-exiting optimize framework "Longpeng(Mike)" <longpeng2@huawei.com> - 2017-08-07 10:50 +0200
Re: [PATCH 1/3] KVM: add spinlock-exiting optimize framework David Hildenbrand <david@redhat.com> - 2017-08-07 11:00 +0200
Re: [PATCH 1/3] KVM: add spinlock-exiting optimize framework "Longpeng (Mike)" <longpeng2@huawei.com> - 2017-08-07 11:10 +0200
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