diff options
| author | Konrad Rzeszutek Wilk | 2010-08-26 19:57:57 +0200 |
|---|---|---|
| committer | H. Peter Anvin | 2010-08-27 00:13:13 +0200 |
| commit | 480125ba49ba62be93beea37770f266846e077ab (patch) | |
| tree | 6e4437d77e352f5b03d1e00171bd77086378b01a /arch/x86/include | |
| parent | x86, iommu: Add IOMMU_INIT macros, .iommu_table section, and iommu_table_entr... (diff) | |
| download | kernel-qcow2-linux-480125ba49ba62be93beea37770f266846e077ab.tar.gz kernel-qcow2-linux-480125ba49ba62be93beea37770f266846e077ab.tar.xz kernel-qcow2-linux-480125ba49ba62be93beea37770f266846e077ab.zip | |
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 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/amd_iommu.h | 4 | ||||
| -rw-r--r-- | arch/x86/include/asm/calgary.h | 4 | ||||
| -rw-r--r-- | arch/x86/include/asm/gart.h | 5 |
3 files changed, 7 insertions, 6 deletions
diff --git a/arch/x86/include/asm/amd_iommu.h b/arch/x86/include/asm/amd_iommu.h index 5af2982133b5..2798142cdb49 100644 --- a/arch/x86/include/asm/amd_iommu.h +++ b/arch/x86/include/asm/amd_iommu.h @@ -24,11 +24,11 @@ #ifdef CONFIG_AMD_IOMMU -extern void amd_iommu_detect(void); +extern int amd_iommu_detect(void); #else -static inline void amd_iommu_detect(void) { } +static inline int amd_iommu_detect(void) { return -ENODEV; } #endif diff --git a/arch/x86/include/asm/calgary.h b/arch/x86/include/asm/calgary.h index 0918654305af..0d467b338835 100644 --- a/arch/x86/include/asm/calgary.h +++ b/arch/x86/include/asm/calgary.h @@ -62,9 +62,9 @@ struct cal_chipset_ops { extern int use_calgary; #ifdef CONFIG_CALGARY_IOMMU -extern void detect_calgary(void); +extern int detect_calgary(void); #else -static inline void detect_calgary(void) { return; } +static inline int detect_calgary(void) { return -ENODEV; } #endif #endif /* _ASM_X86_CALGARY_H */ diff --git a/arch/x86/include/asm/gart.h b/arch/x86/include/asm/gart.h index 4ac5b0f33fc1..d7d1d4c438a4 100644 --- a/arch/x86/include/asm/gart.h +++ b/arch/x86/include/asm/gart.h @@ -37,7 +37,7 @@ extern int gart_iommu_aperture_disabled; extern void early_gart_iommu_check(void); extern int gart_iommu_init(void); extern void __init gart_parse_options(char *); -extern void gart_iommu_hole_init(void); +extern int gart_iommu_hole_init(void); #else #define gart_iommu_aperture 0 @@ -50,8 +50,9 @@ static inline void early_gart_iommu_check(void) static inline void gart_parse_options(char *options) { } -static inline void gart_iommu_hole_init(void) +static inline int gart_iommu_hole_init(void) { + return -ENODEV; } #endif |