RE: [PATCH v8 00/11] ACPI/IORT: Support for IORT RMR node

Shameerali Kolothum Thodi
2022-03-11T13:24:02Z

> -----Original Message-----
> From: Eric Auger [mailto:eric.auger@redhat.com]
> Sent: 11 March 2022 08:07
> To: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>;
> linux-arm-kernel@lists.infradead.org; linux-acpi@vger.kernel.org;
> iommu@lists.linux-foundation.org
> Cc: Linuxarm <linuxarm@huawei.com>; lorenzo.pieralisi@arm.com;
> joro@8bytes.org; robin.murphy@arm.com; will@kernel.org; wanghuiqiang
> <wanghuiqiang@huawei.com>; Guohanjun (Hanjun Guo)
> <guohanjun@huawei.com>; steven.price@arm.com; Sami.Mujawar@arm.com;
> jon@solid-run.com; yangyicong <yangyicong@huawei.com>
> Subject: Re: [PATCH v8 00/11] ACPI/IORT: Support for IORT RMR node
>
> Hi Shameer,
>
> On 2/21/22 4:43 PM, Shameer Kolothum wrote:
> > Hi,
> >
> > Since we now have an updated verion[0] of IORT spec(E.d) which
> > addresses the memory attributes issues discussed here [1],
> > this series now make use of it.
> >
> > The pull request for ACPICA E.d related changes are already
> > raised and can be found here,
> > https://github.com/acpica/acpica/pull/752
> >
> > v7 --> v8
> > - Patch #1 has temp definitions for RMR related changes till
> > the ACPICA header changes are part of kernel.
> > - No early parsing of RMR node info and is only parsed at the
> > time of use.
> > - Changes to the RMR get/put API format compared to the
> > previous version.
> > - Support for RMR descriptor shared by multiple stream IDs.
>
> I tested it on guest side for host MSI SW RESV region flat mapping
> (using both the old single mapping layout and the now allowed multiple
> RID ID mapping format) and this worked for me. Feel free to add my
>
> Tested-by: Eric Auger <eric.auger@redhat.com>

Thanks Eric for verifying this, especially the multiple RID mapping case.

Cheers,
Shameer