x86, iommu: Make all IOMMU's detection routines return a value.
authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Thu, 26 Aug 2010 17:57:57 +0000 (13:57 -0400)
committerH. Peter Anvin <hpa@linux.intel.com>
Thu, 26 Aug 2010 22:13:13 +0000 (15:13 -0700)
commit480125ba49ba62be93beea37770f266846e077ab
tree6e4437d77e352f5b03d1e00171bd77086378b01a
parent0444ad93ea2449963132d68753020a6a24d69895
x86, iommu: Make all IOMMU's detection routines return a value.

We return 1 if the IOMMU has been detected. Zero or an error number
if we failed to find it. This is in preperation of using the IOMMU_INIT
so that we can detect whether an IOMMU is present. I have not
tested this for regression on Calgary, nor on AMD Vi chipsets as
I don't have that hardware.

CC: Muli Ben-Yehuda <muli@il.ibm.com>
CC: "Jon D. Mason" <jdmason@kudzu.us>
CC: "Darrick J. Wong" <djwong@us.ibm.com>
CC: Jesse Barnes <jbarnes@virtuousgeek.org>
CC: David Woodhouse <David.Woodhouse@intel.com>
CC: Chris Wright <chrisw@sous-sol.org>
CC: Yinghai Lu <yinghai@kernel.org>
CC: Joerg Roedel <joerg.roedel@amd.com>
CC: H. Peter Anvin <hpa@zytor.com>
CC: Fujita Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
LKML-Reference: <1282845485-8991-3-git-send-email-konrad.wilk@oracle.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
arch/x86/include/asm/amd_iommu.h
arch/x86/include/asm/calgary.h
arch/x86/include/asm/gart.h
arch/x86/kernel/amd_iommu_init.c
arch/x86/kernel/aperture_64.c
arch/x86/kernel/pci-calgary_64.c
drivers/pci/dmar.c
include/linux/dmar.h