linux-kernel - Re: [PATCH 1/4] xen/mcfg: Call PHYSDEVOP_pci_mmcfg

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Date:	Thu, 21 Nov 2013 10:37:54 +0000
From:	David Vrabel <david.vrabel@...rix.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	<Ian.Campbell@...rix.com>, <xen-devel@...ts.xenproject.org>,
	<linux-kernel@...r.kernel.org>, <JBeulich@...e.com>,
	<boris.ostrovsky@...cle.com>,
	Mukesh Rathor <mukesh.rathor@...cle.com>
Subject: Re: [PATCH 1/4] xen/mcfg: Call PHYSDEVOP_pci_mmcfg_reserved for MCFG
 areas.

On 08/11/13 17:38, Konrad Rzeszutek Wilk wrote:
> The PCI MMCONFIG area is usually reserved via the E820 so the Xen hypervisor
> is aware of these regions. But they can also be enumerated in the ACPI
> DSDT which means the hypervisor won't know of them until the initial
> domain informs it of via PHYSDEVOP_pci_mmcfg_reserved.
> 
> This is what this patch does for all of the MCFG regions that the
> initial domain is aware of (E820 enumerated and ACPI).
> 
> Reported-by:  Santosh Jodh <Santosh.Jodh@...rix.com>
> CC: Jan Beulich <JBeulich@...e.com>
> CC: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> CC: David Vrabel <david.vrabel@...rix.com>
> CC: Mukesh Rathor <mukesh.rathor@...cle.com>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>

Reviewed-by: David Vrabel <david.vrabel@...rix.com>

> [v1: Redid it a bit]
> [v2: Dropped the P2M 1-1 setting]
> [v3: Check for Xen in-case we are running under baremetal]
> [v4: Wrap with CONFIG_PCI_MMCONFIG]

This sort of change list isn't useful in the long term. I'd prefer it if
this was after the --- divider.

> --- a/drivers/xen/pci.c
> +++ b/drivers/xen/pci.c
> @@ -26,6 +26,7 @@
> +		default:
> +			pr_warn("Failed to report MMCONFIG reservation"
> +				" state for %s to hypervisor"
> +				" (%d)\n",

Message strings shouldn't be split like this.

David
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