linux-kernel - Re: [PATCH RFC 3/7] kvm: x86: XSAVE state and XFD MSRs context switch

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Message-ID: <20210207114902.GA6723@zn.tnic>
Date:   Sun, 7 Feb 2021 12:49:02 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Jing Liu <jing2.liu@...ux.intel.com>
Cc:     pbonzini@...hat.com, seanjc@...gle.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, jing2.liu@...el.com,
        x86-ml <x86@...nel.org>
Subject: Re: [PATCH RFC 3/7] kvm: x86: XSAVE state and XFD MSRs context switch

On Sun, Feb 07, 2021 at 10:42:52AM -0500, Jing Liu wrote:
> diff --git a/arch/x86/kernel/fpu/init.c b/arch/x86/kernel/fpu/init.c
> index 7e0c68043ce3..fbb761fc13ec 100644
> --- a/arch/x86/kernel/fpu/init.c
> +++ b/arch/x86/kernel/fpu/init.c
> @@ -145,6 +145,7 @@ EXPORT_SYMBOL_GPL(fpu_kernel_xstate_min_size);
>   * can be dynamically expanded to include some states up to this size.
>   */
>  unsigned int fpu_kernel_xstate_max_size;
> +EXPORT_SYMBOL_GPL(fpu_kernel_xstate_max_size);
>  
>  /* Get alignment of the TYPE. */
>  #define TYPE_ALIGN(TYPE) offsetof(struct { char x; TYPE test; }, test)
> diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
> index 080f3be9a5e6..9c471a0364e2 100644
> --- a/arch/x86/kernel/fpu/xstate.c
> +++ b/arch/x86/kernel/fpu/xstate.c
> @@ -77,12 +77,14 @@ static struct xfeature_capflag_info xfeature_capflags[] __initdata = {
>   * XSAVE buffer, both supervisor and user xstates.
>   */
>  u64 xfeatures_mask_all __read_mostly;
> +EXPORT_SYMBOL_GPL(xfeatures_mask_all);
>  
>  /*
>   * This represents user xstates, a subset of xfeatures_mask_all, saved in a
>   * dynamic kernel XSAVE buffer.
>   */
>  u64 xfeatures_mask_user_dynamic __read_mostly;
> +EXPORT_SYMBOL_GPL(xfeatures_mask_user_dynamic);
>  
>  static unsigned int xstate_offsets[XFEATURE_MAX] = { [ 0 ... XFEATURE_MAX - 1] = -1};
>  static unsigned int xstate_sizes[XFEATURE_MAX]   = { [ 0 ... XFEATURE_MAX - 1] = -1};

Make sure you Cc x86@...nel.org when touching code outside of kvm.

There's this script called scripts/get_maintainer.pl which will tell you who to
Cc. Use it before you send next time please.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette