Re: [PATCH 1/2] kvm: vmx: Use basic exit reason to check if it's the specific VM EXIT

From: Vitaly Kuznetsov
Date: Tue Feb 25 2020 - 08:11:25 EST


Krish Sadhukhan <krish.sadhukhan@xxxxxxxxxx> writes:

>
> We have a macro for bit 31,
>
> ÂÂÂ VMX_EXIT_REASONS_FAILED_VMENTRYÂÂÂ ÂÂÂ ÂÂÂ ÂÂÂ 0x80000000
>
>
> Does it make sense to define a macro like that instead ? Say,
>
> ÂÂÂ VMX_BASIC_EXIT_REASONÂÂÂ ÂÂÂ 0x0000ffff
>

0xffffU ?

> and then we do,
>
> ÂÂÂ u32 exit_reason = vmx->exit_reason;
> ÂÂÂ u16 basic_exit_reason = exit_reason & VMX_BASIC_EXIT_REASON;
>

Just a naming suggestion: if we decide to go down this road, let's name
it e.g. VMX_BASIC_EXIT_REASON_MASK to make it clear this is *not* an
exit reason.

--
Vitaly