Re: [LTP] [PATCH 3/5] KVM: Simplify reading VMX control field masks

[Petr Vorel <pvorel@suse.cz>]

Hi Martin,

> Hi!

> On 16. 04. 25 9:16, Petr Vorel wrote:
> > Hi Martin,

> > > Hi Martin,

> > > ...
> > > >   	/* Configure VM execution control fields */
> > > > -	if (kvm_rdmsr(MSR_IA32_VMX_BASIC) & IA32_VMXBASIC_USELESS_CTL_MASKS) {
> > > > -		pinxctl = (uint32_t)kvm_rdmsr(MSR_IA32_VMX_PINX_MASK2);
> > > > -		execctl = (uint32_t)kvm_rdmsr(MSR_IA32_VMX_EXECCTL_MASK2);
> > > > -		exitctl = (uint32_t)kvm_rdmsr(MSR_IA32_VMX_EXITCTL_MASK2);
> > > > -		entryctl = (uint32_t)kvm_rdmsr(MSR_IA32_VMX_ENTRYCTL_MASK2);
> > > > -	} else {
> > > > -		pinxctl = (uint32_t)kvm_rdmsr(MSR_IA32_VMX_PINX_MASK);
> > > > -		execctl = (uint32_t)kvm_rdmsr(MSR_IA32_VMX_EXECCTL_MASK);
> > > > -		exitctl = (uint32_t)kvm_rdmsr(MSR_IA32_VMX_EXITCTL_MASK);
> > > > -		entryctl = (uint32_t)kvm_rdmsr(MSR_IA32_VMX_ENTRYCTL_MASK);

> > The rest of the patchset merged, thank you!

> > > I guess you're going to use in the future MSR_IA32_VMX_PINX_MASK2 and other
> > > deleted masks (because now they are IMHO only in the structs).

> > If you don't need the constants in the future, please remove it in a subsequent
> > patch.

> Those constants are still used in kvm_vmx_read_vmctl_mask() via the static
> lookup table in lib_x86.c. We can't remove them because the tests would
> break on old CPUs.

Good to know, thanks for info!

Kind regards,
Petr

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