Commit 7d43c2e4 authored by Alex Williamson's avatar Alex Williamson Committed by Joerg Roedel
Browse files

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: default avatarAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 783f157b

Documentation/kernel-parameters.txt

+0 −1
Original line number Diff line number Diff line
@@ -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

arch/ia64/include/asm/iommu.h

+0 −2
Original line number Diff line number Diff line
@@ -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);

arch/ia64/kernel/pci-dma.c

+0 −1
Original line number Diff line number Diff line
@@ -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

arch/x86/include/asm/iommu.h

+0 −1
Original line number Diff line number Diff line
@@ -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)

arch/x86/kernel/pci-dma.c

+0 −11
Original line number Diff line number Diff line
@@ -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);

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