Re: [PATCH v2 1/5] x86/kvm: rename HV_X64_MSR_APIC_ASSIST_PAGE to HV_X64_MSR_VP_ASSIST_PAGE

[Radim KrÄmÃÅ]

2018-02-26 18:11+0100, Vitaly Kuznetsov:
> From: Ladi Prosek <lprosek@xxxxxxxxxx>
> 
> The assist page has been used only for the paravirtual EOI so far, hence
> the "APIC" in the MSR name. Renaming to match the Hyper-V TLFS where it's
> called "Virtual VP Assist MSR".
> 
> Signed-off-by: Ladi Prosek <lprosek@xxxxxxxxxx>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
> ---
>  arch/x86/include/uapi/asm/hyperv.h | 10 +++++-----
>  arch/x86/kvm/hyperv.c              |  8 ++++----
>  arch/x86/kvm/lapic.h               |  2 +-
>  arch/x86/kvm/x86.c                 |  2 +-
>  4 files changed, 11 insertions(+), 11 deletions(-)
> 
> diff --git a/arch/x86/include/uapi/asm/hyperv.h b/arch/x86/include/uapi/asm/hyperv.h
> index 1c12aaf33915..45cc62352040 100644
> --- a/arch/x86/include/uapi/asm/hyperv.h
> +++ b/arch/x86/include/uapi/asm/hyperv.h
> @@ -189,7 +189,7 @@
>  #define HV_X64_MSR_EOI				0x40000070
>  #define HV_X64_MSR_ICR				0x40000071
>  #define HV_X64_MSR_TPR				0x40000072
> -#define HV_X64_MSR_APIC_ASSIST_PAGE		0x40000073
> +#define HV_X64_MSR_VP_ASSIST_PAGE		0x40000073
>  
>  /* Define synthetic interrupt controller model specific registers. */
>  #define HV_X64_MSR_SCONTROL			0x40000080
> @@ -275,10 +275,10 @@ struct hv_tsc_emulation_status {
>  #define HVCALL_POST_MESSAGE			0x005c
>  #define HVCALL_SIGNAL_EVENT			0x005d
>  
> -#define HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE		0x00000001
> -#define HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT	12
> -#define HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_MASK	\
> -		(~((1ull << HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT) - 1))

Removing definitions from userspace api isn't a good idea.

I have no idea why hyper.h is a userspace api, though -- Linux doesn't
define any of those, so we could copy the definitions to a private
header, rename, and never look at this file again.