From: Peter Xu <peterx@redhat.com>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
cohuck@redhat.com, jgg@ziepe.ca
Subject: Re: [PATCH v2 2/3] vfio-pci: Fault mmaps to enable vma tracking
Date: Thu, 7 May 2020 17:47:44 -0400 [thread overview]
Message-ID: <20200507214744.GP228260@xz-x1> (raw)
In-Reply-To: <158871569380.15589.16950418949340311053.stgit@gimli.home>
Hi, Alex,
On Tue, May 05, 2020 at 03:54:53PM -0600, Alex Williamson wrote:
> +/*
> + * Zap mmaps on open so that we can fault them in on access and therefore
> + * our vma_list only tracks mappings accessed since last zap.
> + */
> +static void vfio_pci_mmap_open(struct vm_area_struct *vma)
> +{
> + zap_vma_ptes(vma, vma->vm_start, vma->vm_end - vma->vm_start);
A pure question: is this only a safety-belt or it is required in some known
scenarios?
In all cases:
Reviewed-by: Peter Xu <peterx@redhat.com>
Thanks,
--
Peter Xu
next prev parent reply other threads:[~2020-05-07 21:47 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-05 21:54 [PATCH v2 0/3] vfio-pci: Block user access to disabled device MMIO Alex Williamson
2020-05-05 21:54 ` [PATCH v2 1/3] vfio/type1: Support faulting PFNMAP vmas Alex Williamson
2020-05-07 21:24 ` Peter Xu
2020-05-07 21:47 ` Alex Williamson
2020-05-07 23:54 ` Jason Gunthorpe
2020-05-08 2:19 ` Peter Xu
2020-05-08 12:10 ` Jason Gunthorpe
2020-05-08 14:30 ` Peter Xu
2020-05-08 15:05 ` Jason Gunthorpe
2020-05-08 15:42 ` Alex Williamson
2020-05-08 16:05 ` Peter Xu
2020-05-08 18:39 ` Peter Xu
2020-05-05 21:54 ` [PATCH v2 2/3] vfio-pci: Fault mmaps to enable vma tracking Alex Williamson
2020-05-07 21:47 ` Peter Xu [this message]
2020-05-07 22:03 ` Alex Williamson
2020-05-07 22:22 ` Peter Xu
2020-05-07 23:56 ` Jason Gunthorpe
2020-05-08 2:16 ` Peter Xu
2020-05-08 6:44 ` Jason Wang
2020-05-08 14:27 ` Peter Xu
2020-05-08 12:08 ` Jason Gunthorpe
2020-05-08 14:26 ` Peter Xu
2020-05-05 21:55 ` [PATCH v2 3/3] vfio-pci: Invalidate mmaps and block MMIO access on disabled memory Alex Williamson
2020-05-22 2:39 ` Qian Cai
2020-05-22 4:18 ` Alex Williamson
2020-05-07 21:59 ` [PATCH v2 0/3] vfio-pci: Block user access to disabled device MMIO Peter Xu
2020-05-07 22:34 ` Alex Williamson
2020-05-08 2:31 ` Peter Xu
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