https://github.com/torvalds/linux
Revision dd95f1a4b5ca904c78e6a097091eb21436478abb authored by Dave Hansen on 04 December 2017, 14:07:56 UTC, committed by Ingo Molnar on 22 December 2017, 19:13:04 UTC
There are effectively two ASID types:

 1. The one stored in the mmu_context that goes from 0..5
 2. The one programmed into the hardware that goes from 1..6

This consolidates the locations where converting between the two (by doing
a +1) to a single place which gives us a nice place to comment.
PAGE_TABLE_ISOLATION will also need to, given an ASID, know which hardware
ASID to flush for the userspace mapping.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: David Laight <David.Laight@aculab.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Eduardo Valentin <eduval@amazon.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: aliguori@amazon.com
Cc: daniel.gruss@iaik.tugraz.at
Cc: hughd@google.com
Cc: keescook@google.com
Cc: linux-mm@kvack.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
1 parent cb0a914
Raw File
Tip revision: dd95f1a4b5ca904c78e6a097091eb21436478abb authored by Dave Hansen on 04 December 2017, 14:07:56 UTC
x86/mm: Put MMU to hardware ASID translation in one place
Tip revision: dd95f1a
Kconfig
menuconfig SAMPLES
	bool "Sample kernel code"
	help
	  You can build and test sample kernel code here.

if SAMPLES

config SAMPLE_TRACE_EVENTS
	tristate "Build trace_events examples -- loadable modules only"
	depends on EVENT_TRACING && m
	help
	  This build trace event example modules.

config SAMPLE_TRACE_PRINTK
        tristate "Build trace_printk module - tests various trace_printk formats"
	depends on EVENT_TRACING && m
	help
	 This builds a module that calls trace_printk() and can be used to
	 test various trace_printk() calls from a module.

config SAMPLE_KOBJECT
	tristate "Build kobject examples -- loadable modules only"
	depends on m
	help
	  This config option will allow you to build a number of
	  different kobject sample modules showing how to use kobjects,
	  ksets, and ktypes properly.

	  If in doubt, say "N" here.

config SAMPLE_KPROBES
	tristate "Build kprobes examples -- loadable modules only"
	depends on KPROBES && m
	help
	  This build several kprobes example modules.

config SAMPLE_KRETPROBES
	tristate "Build kretprobes example -- loadable modules only"
	default m
	depends on SAMPLE_KPROBES && KRETPROBES

config SAMPLE_HW_BREAKPOINT
	tristate "Build kernel hardware breakpoint examples -- loadable module only"
	depends on HAVE_HW_BREAKPOINT && m
	help
	  This builds kernel hardware breakpoint example modules.

config SAMPLE_KFIFO
	tristate "Build kfifo examples -- loadable modules only"
	depends on m
	help
	  This config option will allow you to build a number of
	  different kfifo sample modules showing how to use the
	  generic kfifo API.

	  If in doubt, say "N" here.

config SAMPLE_KDB
	tristate "Build kdb command example -- loadable modules only"
	depends on KGDB_KDB && m
	help
	  Build an example of how to dynamically add the hello
	  command to the kdb shell.

config SAMPLE_RPMSG_CLIENT
	tristate "Build rpmsg client sample -- loadable modules only"
	depends on RPMSG && m
	help
	  Build an rpmsg client sample driver, which demonstrates how
	  to communicate with an AMP-configured remote processor over
	  the rpmsg bus.

config SAMPLE_LIVEPATCH
	tristate "Build live patching sample -- loadable modules only"
	depends on LIVEPATCH && m
	help
	  Builds a sample live patch that replaces the procfs handler
	  for /proc/cmdline to print "this has been live patched".

config SAMPLE_CONFIGFS
	tristate "Build configfs patching sample -- loadable modules only"
	depends on CONFIGFS_FS && m
	help
	  Builds a sample configfs interface.

config SAMPLE_CONNECTOR
	tristate "Build connector sample -- loadable modules only"
	depends on CONNECTOR && m
	help
	  When enabled, this builds both a sample kernel module for
	  the connector interface and a user space tool to communicate
	  with it.
	  See also Documentation/connector/connector.txt

config SAMPLE_SECCOMP
	tristate "Build seccomp sample code -- loadable modules only"
	depends on SECCOMP_FILTER && m
	help
	  Build samples of seccomp filters using various methods of
	  BPF filter construction.

config SAMPLE_BLACKFIN_GPTIMERS
	tristate "Build blackfin gptimers sample code -- loadable modules only"
	depends on BLACKFIN && BFIN_GPTIMERS && m
	help
	  Build samples of blackfin gptimers sample module.

config SAMPLE_VFIO_MDEV_MTTY
	tristate "Build VFIO mtty example mediated device sample code -- loadable modules only"
	depends on VFIO_MDEV_DEVICE && m
	help
	  Build a virtual tty sample driver for use as a VFIO
	  mediated device

config SAMPLE_STATX
	bool "Build example extended-stat using code"
	depends on BROKEN
	help
	  Build example userspace program to use the new extended-stat syscall.

endif # SAMPLES
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