diff options
| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2010-08-26 13:57:57 -0400 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-08-26 15:13:13 -0700 |
| commit | 480125ba49ba62be93beea37770f266846e077ab (patch) | |
| tree | 6e4437d77e352f5b03d1e00171bd77086378b01a /include/linux/dmar.h | |
| parent | 0444ad93ea2449963132d68753020a6a24d69895 (diff) | |
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>
Diffstat (limited to 'include/linux/dmar.h')
| -rw-r--r-- | include/linux/dmar.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/dmar.h b/include/linux/dmar.h index d7cecc90ed3..a2060204151 100644 --- a/include/linux/dmar.h +++ b/include/linux/dmar.h @@ -57,15 +57,15 @@ extern int dmar_table_init(void); extern int dmar_dev_scope_init(void); /* Intel IOMMU detection */ -extern void detect_intel_iommu(void); +extern int detect_intel_iommu(void); extern int enable_drhd_fault_handling(void); extern int parse_ioapics_under_ir(void); extern int alloc_iommu(struct dmar_drhd_unit *); #else -static inline void detect_intel_iommu(void) +static inline int detect_intel_iommu(void) { - return; + return -ENODEV; } static inline int dmar_table_init(void) |