From: Tiwei Bie <tiwei.bie@intel.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>,
Ferruh Yigit <ferruh.yigit@intel.com>,
dev@dpdk.org
Subject: Re: [dpdk-dev] Virtio pci legacy support
Date: Wed, 13 Nov 2019 13:21:56 +0800 [thread overview]
Message-ID: <20191113052156.GA5892@___> (raw)
In-Reply-To: <20191112092331.1285dda4@shemminger-XPS-13-9360>
On Tue, Nov 12, 2019 at 09:23:31AM -0800, Stephen Hemminger wrote:
> Since Linux kernel is going to drop support for iopl real soon now.
> Is there any ongoing effort to either drop Legacy virtio support,
I think it's not a good idea to drop the legacy virtio
support at present.
> or replace iopl with ioperm,
+1. This looks like the most straightforward way for now.
> or at least test with iopl failing?
The iopl failing test was just moved to rte_pci_ioport_map()
by below series:
https://patches.dpdk.org/cover/61627/
>
> Note: it looks like the current code does not match comment.
>
> /*
> * Request iopl privilege for all RPL, returns 0 on success
> * iopl() call is mostly for the i386 architecture. For other architectures,
> * return -1 to indicate IO privilege can't be changed in this way.
> */
> int
> rte_eal_iopl_init(void)
> {
> #if defined(RTE_ARCH_X86)
> if (iopl(3) != 0)
> return -1;
> #endif
> return 0;
> }
prev parent reply other threads:[~2019-11-13 5:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-12 17:23 Stephen Hemminger
2019-11-13 5:21 ` Tiwei Bie [this message]
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