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iommu: Remove group_mf 

The iommu=group_mf is really no longer needed with the addition of ACS
support in IOMMU drivers creating groups.  Most multifunction devices
will now be grouped already.  If a device has gone to the trouble of
exposing ACS, trust that it works.  We can use the device specific ACS
function for fixing devices we trust individually.  This largely
reverts bcb71abe.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Alex Williamson 2012-05-30 14:19:55 -06:00 committed by Joerg Roedel
parent 783f157bc5
commit 7d43c2e42c
5 changed files with 0 additions and 16 deletions
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1
Documentation/kernel-parameters.txt
View File

@ -1134,7 +1134,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
forcesac
soft
pt [x86, IA-64]
group_mf [x86, IA-64]
io7= [HW] IO7 for Marvel based alpha systems

2
arch/ia64/include/asm/iommu.h
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@ -11,12 +11,10 @@ extern void no_iommu_init(void);
extern int force_iommu, no_iommu;
extern int iommu_pass_through;
extern int iommu_detected;
extern int iommu_group_mf;
#else
#define iommu_pass_through (0)
#define no_iommu (1)
#define iommu_detected (0)
#define iommu_group_mf (0)
#endif
extern void iommu_dma_init(void);
extern void machvec_init(const char *name);

1
arch/ia64/kernel/pci-dma.c
View File

@ -32,7 +32,6 @@ int force_iommu __read_mostly;
#endif
int iommu_pass_through;
int iommu_group_mf;
/* Dummy device used for NULL arguments (normally ISA). Better would
be probably a smaller DMA mask, but this is bug-to-bug compatible

1
arch/x86/include/asm/iommu.h
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@ -5,7 +5,6 @@ extern struct dma_map_ops nommu_dma_ops;
extern int force_iommu, no_iommu;
extern int iommu_detected;
extern int iommu_pass_through;
extern int iommu_group_mf;
/* 10 seconds */
#define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)

11
arch/x86/kernel/pci-dma.c
View File

@ -45,15 +45,6 @@ int iommu_detected __read_mostly = 0;
*/
int iommu_pass_through __read_mostly;
/*
* Group multi-function PCI devices into a single device-group for the
* iommu_device_group interface. This tells the iommu driver to pretend
* it cannot distinguish between functions of a device, exposing only one
* group for the device. Useful for disallowing use of individual PCI
* functions from userspace drivers.
*/
int iommu_group_mf __read_mostly;
extern struct iommu_table_entry __iommu_table[], __iommu_table_end[];
/* Dummy device used for NULL arguments (normally ISA). */
@ -194,8 +185,6 @@ static __init int iommu_setup(char *p)
#endif
if (!strncmp(p, "pt", 2))
iommu_pass_through = 1;
if (!strncmp(p, "group_mf", 8))
iommu_group_mf = 1;
gart_parse_options(p);