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From: Qian Cai <cai@lca.pw>
To: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Joerg Roedel <joro@8bytes.org>,
	David Woodhouse <dwmw2@infradead.org>,
	kevin.tian@intel.com, ashok.raj@intel.com,
	linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
	jacob.jun.pan@intel.com
Subject: Re: [PATCH v2 1/1] iommu/vt-d: Add Kconfig option to enable/disable scalable mode
Date: Mon, 11 Nov 2019 09:05:20 -0500	[thread overview]
Message-ID: <77EC0C76-22C1-4982-8E0A-9AD7223B3410@lca.pw> (raw)
In-Reply-To: <f5b8521e-d88d-5439-34e2-f7b54a77c9d3@linux.intel.com>



> On Nov 11, 2019, at 12:23 AM, Lu Baolu <baolu.lu@linux.intel.com> wrote:
> 
> The scalable mode is defined in VT-d 3.0. The scalable mode capability
> could be checked by reading /sys/devices/virtual/iommu/dmar*/intel-
> iommu/ecap. It's currently not friendly for reading. You need to decode
> it according to the spec.

This looks like some perfect information to put in the Kconfig description.

  reply	other threads:[~2019-11-11 14:05 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-09  3:40 [PATCH v2 1/1] iommu/vt-d: Add Kconfig option to enable/disable scalable mode Lu Baolu
2019-11-09  3:59 ` Qian Cai
2019-11-11  1:27   ` Lu Baolu
2019-11-11  2:00     ` Qian Cai
2019-11-11  2:17       ` Lu Baolu
2019-11-11  2:58 ` Qian Cai
2019-11-11  5:20   ` Lu Baolu
2019-11-11 14:05     ` Qian Cai [this message]
2019-11-12  5:48       ` Lu Baolu

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