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Re: [PATCH v2 0/3] xen: remove some checks for always present Xen features
- To: Juergen Gross <jgross@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx
- From: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
- Date: Fri, 30 Jul 2021 09:10:25 -0400
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>
- Delivery-date: Fri, 30 Jul 2021 13:11:09 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 7/30/21 3:18 AM, Juergen Gross wrote:
> Some features of Xen can be assumed to be always present, so add a
> central check to verify this being true and remove the other checks.
>
> Juergen Gross (3):
> xen: check required Xen features
> xen: assume XENFEAT_mmu_pt_update_preserve_ad being set for pv guests
> xen: assume XENFEAT_gnttab_map_avail_bits being set for pv guests
>
> arch/x86/xen/enlighten_pv.c | 12 ++----------
> arch/x86/xen/mmu_pv.c | 4 ++--
> drivers/xen/features.c | 18 ++++++++++++++++++
> drivers/xen/gntdev.c | 36 ++----------------------------------
> 4 files changed, 24 insertions(+), 46 deletions(-)
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
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