Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Wed, 16 Jun 2021 17:35:19 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc:     Christoph Hellwig <hch@lst.de>, Roman Skakun <rm.skakun@gmail.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        Juergen Gross <jgross@suse.com>,
        Stefano Stabellini <sstabellini@kernel.org>,
        xen-devel@lists.xenproject.org, iommu@lists.linux-foundation.org,
        linux-kernel@vger.kernel.org,
        Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>,
        Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>,
        Volodymyr Babchuk <volodymyr_babchuk@epam.com>,
        Roman Skakun <roman_skakun@epam.com>,
        Andrii Anisov <andrii_anisov@epam.com>
Subject: Re: [PATCH 2/2] swiotlb-xen: override common mmap and get_sgtable
 dma ops
Message-ID: <20210616153519.GA6476@lst.de>
References: <855a58e2-1e03-4763-cb56-81367b73762c@oracle.com> <20210616114205.38902-1-roman_skakun@epam.com> <20210616114205.38902-2-roman_skakun@epam.com> <2834cdc0-534c-4f07-1901-e468a7713c1f@oracle.com> <20210616142148.GA764@lst.de> <83353b34-2abb-9dfc-bed6-21d500abf49f@oracle.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <83353b34-2abb-9dfc-bed6-21d500abf49f@oracle.com>
User-Agent: Mutt/1.5.17 (2007-11-01)
Precedence: bulk

On Wed, Jun 16, 2021 at 11:33:50AM -0400, Boris Ostrovsky wrote:
> Isn't the expectation of virt_to_page() that it only works on non-vmalloc'd addresses? (This is not a rhetorical question, I actually don't know).

Yes.  Thus is why I'd suggest to just do the vmalloc_to_page or
virt_to_page dance in ops_helpers.c and just continue using that.