Re: [PATCH v4 21/26] KVM: SVM: Rename vmcb->virt_ext to vmcb->misc_ctl2

[Sean Christopherson]

On Thu, Jan 15, 2026, Yosry Ahmed wrote:
> @@ -244,6 +241,8 @@ struct __attribute__ ((__packed__)) vmcb_control_area {
>  #define SVM_MISC_CTL_SEV_ENABLE		BIT(1)
>  #define SVM_MISC_CTL_SEV_ES_ENABLE	BIT(2)
>  
> +#define SVM_MISC_CTL2_LBR_CTL_ENABLE		BIT_ULL(0)
> +#define SVM_MISC_CTL2_V_VMLOAD_VMSAVE_ENABLE	BIT_ULL(1)

Since you're changing names anyways, What do you think about shortening things
a bit, and using the more standard syle of <scope>_<action>_<flag>?  E.g.

  #define SVM_MISC2_ENABLE_LBR_VIRTUALIZATION	BIT_ULL(0)
  #define SVM_MISC2_ENABLE_V_VMLOAD_VMSAVE	BIT_ULL(1)

Yeah, it diverges from many of the other bits in here, but frankly the names in
this file are *awful*.

Actually, maybe that would prompt me to send a cleanup, because the fact that we
have this set of flags is beyond ridiculous (I geniunely don't remember what
V_GIF_MASK tracks, off the top of my head).  And in isolation, I can't remember
iof V_IRQ_MASK is an enable flag or a "IRQs are masked" flagged.

#define V_IRQ_MASK
#define V_INTR_MASKING_MASK
#define V_GIF_MASK
#define V_GIF_ENABLE_MASK