lkml.org 
[lkml]   [2019]   [Apr]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 1/2] kvm: arm: Clean up the checking for huge mapping
From
Date

On 2019/4/10 23:23, Suzuki K Poulose wrote:
> If we are checking whether the stage2 can map PAGE_SIZE,
> we don't have to do the boundary checks as both the host
> VMA and the guest memslots are page aligned. Bail the case
> easily.
>
> Cc: Christoffer Dall <christoffer.dall@arm.com>
> Cc: Marc Zyngier <marc.zyngier@arm.com>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> ---
> virt/kvm/arm/mmu.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
> index a39dcfd..6d73322 100644
> --- a/virt/kvm/arm/mmu.c
> +++ b/virt/kvm/arm/mmu.c
> @@ -1624,6 +1624,10 @@ static bool fault_supports_stage2_huge_mapping(struct kvm_memory_slot *memslot,
> hva_t uaddr_start, uaddr_end;
> size_t size;
>
> + /* The memslot and the VMA are guaranteed to be aligned to PAGE_SIZE */
> + if (map_size == PAGE_SIZE)
> + return true;
> +
> size = memslot->npages * PAGE_SIZE;
>
> gpa_start = memslot->base_gfn << PAGE_SHIFT;
>
We can do a comment clean up as well in this patch.

s/<< PAGE_SIZE/<< PAGE_SHIFT/


thanks,
zenghui

\
 
 \ /
  Last update: 2019-04-11 03:50    [W:0.071 / U:0.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site