Messages in this thread | | | Date | Wed, 29 Jun 2011 14:09:52 +0300 | From | Avi Kivity <> | Subject | Re: [PATCH v2 04/22] KVM: x86: introduce vcpu_gva_to_gpa to cleanup the code |
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On 06/29/2011 01:56 PM, Xiao Guangrong wrote: > On 06/29/2011 04:24 PM, Avi Kivity wrote: > > >> +static int vcpu_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva, > >> + gpa_t *gpa, struct x86_exception *exception, > >> + bool write) > >> +{ > >> + u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0; > >> + > >> + if (write) > >> + access |= PFERR_WRITE_MASK; > > > > Needs fetch as well so NX/SMEP can work. > > > > This function is only used by read/write emulator, execute permission is > not needed for read/write, no?
It's not good to have a function which only implements the functionality partially. It can later be misused.
You can pass the page-fault-error-code instead of the write parameter, I think it will be simpler.
-- error compiling committee.c: too many arguments to function
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