Re: [PATCH v6 5/9] KVM: VMX: Track CPU's MSR_IA32_VMX_BASIC as a single 64-bit value

Huang, Kai
2024-03-27T10:38:39Z

On Fri, 2024-03-08 at 17:27 -0800, Sean Christopherson wrote:
> Track the "basic" capabilities VMX MSR as a single u64 in vmcs_config
> instead of splitting it across three fields, that obviously don't combine
> into a single 64-bit value, so that KVM can use the macros that define MSR
> bits using their absolute position. Replace all open coded shifts and
> masks, many of which are relative to the "high" half, with the appropriate
> macro.
>
> Opportunistically use VMX_BASIC_32BIT_PHYS_ADDR_ONLY instead of an open
> coded equivalent, and clean up the related comment to not reference a
> specific SDM section (to the surprise of no one, the comment is stale).
>
> No functional change intended (though obviously the code generation will
> be quite different).
>
> Cc: Shan Kang <shan.kang@intel.com>
> Cc: Kai Huang <kai.huang@intel.com>
> Signed-off-by: Xin Li <xin3.li@intel.com>
> [sean: split to separate patch, write changelog]
> Signed-off-by: Sean Christopherson <seanjc@google.com>
>

Thanks for doing this:

Reviewed-by: Kai Huang <kai.huang@intel.com>