From: Borislav Petkov <bp@alien8.de>
To: "Wan, Vincent" <Vincent.Wan@amd.com>
Cc: "Wang, Annie" <Annie.Wang@amd.com>,
Vinod Koul <vinod.koul@intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Joerg Roedel <joro@8bytes.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-serial@vger.kernel.org" <linux-serial@vger.kernel.org>,
"dmaengine@vger.kernel.org" <dmaengine@vger.kernel.org>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"Huang, Ray" <Ray.Huang@amd.com>, "Xue, Ken" <Ken.Xue@amd.com>,
"Li, Tony" <Tony.Li@amd.com>
Subject: Re: [PATCH 8/9] Documentation: Add ivrs_acpihid kernel parameter description
Date: Fri, 4 Dec 2015 15:38:03 +0100 [thread overview]
Message-ID: <20151204143803.GH21177@pd.tnic> (raw)
In-Reply-To: <DM3PR1201MB10232DEAF03CAAE29D21FC1AE60C0@DM3PR1201MB1023.namprd12.prod.outlook.com>
On Fri, Dec 04, 2015 at 01:19:35PM +0000, Wan, Vincent wrote:
> > > + ivrs_acpihid [HW,X86_64]
> > > + Provide an override to the ACPI-HID:UID<->DEVICE-ID
> > > + mapping provided in the IVRS ACPI table. For
> > > + example, to map UART-HID:UID AMD0020:0 to
> > > + PCI device 00:14.5 write the parameter as:
> > > + ivrs_acpihid[00:14.5]=AMD0020:0
> >
> > What is that parameter needed for? Can't you deduce the mapping from the
> > hardware?
>
> It is very like ivrs_ioapic/ ivrs_hpet, which can override the dedicated BDF id mapped to HID:UID that was reported from BIOS's IVHD entry.
> If BIOS did not report a right BDF, we can resort to this parameter to correct it.
Please add a verbose, human-readable explanation to the text so that
people know what it is for. The text above is hard to parse even for
insiders.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
next prev parent reply other threads:[~2015-12-04 14:38 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-04 3:24 [PATCH 0/9] 8250: AMD Carrizo UART PL300 DMA enablement Wang Hongcheng
2015-12-04 3:24 ` [PATCH 1/9] ACPI: Add support for AMBA bus type Wang Hongcheng
2015-12-04 8:50 ` Mika Westerberg
2015-12-04 9:17 ` Huang Rui
2015-12-04 9:42 ` Hanjun Guo
2015-12-04 9:59 ` G Gregory
2015-12-04 10:20 ` Huang Rui
2015-12-04 10:23 ` G Gregory
2015-12-04 3:24 ` [PATCH 2/9] 8250/Kconfig: add config option CONFIG_SERIAL_8250_AMD Wang Hongcheng
2015-12-04 11:11 ` Borislav Petkov
2015-12-04 3:24 ` [PATCH 3/9] ACPI: add struct acpi_amba_quirk for AMD pl330 specific device config Wang Hongcheng
[not found] ` <1449199466-6081-4-git-send-email-annie.wang-5C7GfCeVMHo@public.gmane.org>
2015-12-04 12:56 ` kbuild test robot
2015-12-04 13:16 ` Graeme Gregory
2015-12-11 6:57 ` Wang, Annie
[not found] ` <BLUPR12MB04339648B98F07977B6FA61F81EA0-7LeqcoF/hwrdEWIfrEWxYwdYzm3356FpvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2015-12-11 9:31 ` Vinod Koul
2015-12-04 3:24 ` [PATCH 4/9] dmaengine: pl330: add new items for pl330 private data Wang Hongcheng
2015-12-10 4:09 ` Vinod Koul
2015-12-10 6:38 ` Wang, Annie
[not found] ` <BLUPR12MB0433B81BB0AEB2D84505B55881E90-7LeqcoF/hwrdEWIfrEWxYwdYzm3356FpvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2015-12-11 9:29 ` Vinod Koul
2015-12-11 13:56 ` Andy Shevchenko
2015-12-04 3:24 ` [PATCH 5/9] dmaengine: pl330: provide ACPI dmaengine interface Wang Hongcheng
[not found] ` <1449199466-6081-6-git-send-email-annie.wang-5C7GfCeVMHo@public.gmane.org>
2015-12-13 2:21 ` Andy Shevchenko
2015-12-04 3:24 ` [PATCH 6/9] dmaengine:pl330: set segment_boundary_mask = 0cffffffff Wang Hongcheng
2015-12-04 14:59 ` Robin Murphy
2015-12-04 3:24 ` [PATCH 7/9] Serial:8250: New Port Type PORT_AMD_8250 Wang Hongcheng
[not found] ` <1449199466-6081-8-git-send-email-annie.wang-5C7GfCeVMHo@public.gmane.org>
2015-12-13 2:30 ` Andy Shevchenko
2015-12-04 3:24 ` [PATCH 8/9] Documentation: Add ivrs_acpihid kernel parameter description Wang Hongcheng
[not found] ` <1449199466-6081-9-git-send-email-annie.wang-5C7GfCeVMHo@public.gmane.org>
2015-12-04 12:21 ` Borislav Petkov
2015-12-04 13:19 ` Wan, Vincent
2015-12-04 14:38 ` Borislav Petkov [this message]
2015-12-04 3:24 ` [PATCH 9/9] iommu/amd: Add ACPI HID named devices IOMMU driver support Wang Hongcheng
2015-12-13 2:32 ` [PATCH 0/9] 8250: AMD Carrizo UART PL300 DMA enablement Andy Shevchenko
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