Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1283872

Re: [PATCH 8/9] Documentation: Add ivrs_acpihid kernel parameter description

Show all headers | View raw

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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Re: [PATCH 8/9] Documentation: Add ivrs_acpihid kernel parameter  description Borislav Petkov <bp@alien8.de> - 2015-12-04 13:30 +0100
  RE: [PATCH 8/9] Documentation: Add ivrs_acpihid kernel parameter  description "Wan, Vincent" <Vincent.Wan@amd.com> - 2015-12-04 15:00 +0100
    Re: [PATCH 8/9] Documentation: Add ivrs_acpihid kernel parameter  description Borislav Petkov <bp@alien8.de> - 2015-12-04 15:40 +0100

csiph-web