Re: [PATCH v6 04/12] KVM: SVM: Modify intercept_exceptions to generic intercepts

Paolo Bonzini
2020-09-23T02:43:58Z

On 22/09/20 21:11, Babu Moger wrote:
>
>
>> -----Original Message-----
>> From: Paolo Bonzini <pbonzini@redhat.com>
>> Sent: Tuesday, September 22, 2020 8:39 AM
>> To: Sean Christopherson <sean.j.christopherson@intel.com>
>> Cc: Moger, Babu <Babu.Moger@amd.com>; vkuznets@redhat.com;
>> jmattson@google.com; wanpengli@tencent.com; kvm@vger.kernel.org;
>> joro@8bytes.org; x86@kernel.org; linux-kernel@vger.kernel.org;
>> mingo@redhat.com; bp@alien8.de; hpa@zytor.com; tglx@linutronix.de
>> Subject: Re: [PATCH v6 04/12] KVM: SVM: Modify intercept_exceptions to
>> generic intercepts
>>
>> On 14/09/20 17:06, Sean Christopherson wrote:
>>>> I think these should take a vector instead, and add 64 in the functions.
>>>
>>> And "s/int bit/u32 vector" + BUILD_BUG_ON(vector > 32)?
>>
>> Not sure if we can assume it to be constant, but WARN_ON_ONCE is good
>> enough as far as performance is concerned. The same int->u32 +
>> WARN_ON_ONCE should be done in patch 1.
>
> Paolo, Ok sure. Will change "int bit" to "u32 vector". I will send a new
> patch to address this. This needs to be addressed in all these functions,
> vmcb_set_intercept, vmcb_clr_intercept, vmcb_is_intercept,
> set_exception_intercept, clr_exception_intercept, svm_set_intercept,
> svm_clr_intercept, svm_is_intercept.
>
> Also will add WARN_ON_ONCE(vector > 32); on set_exception_intercept,
> clr_exception_intercept. Does that sound good?

I can do the fixes myself, no worries. It should get to kvm/next this week.

Paolo