Paul Mackerras
aa04b4cc5b
KVM: PPC: Allocate RMAs (Real Mode Areas) at boot for use by guests ...
This adds infrastructure which will be needed to allow book3s_hv KVM to
run on older POWER processors, including PPC970, which don't support
the Virtual Real Mode Area (VRMA) facility, but only the Real Mode
Offset (RMO) facility. These processors require a physically
contiguous, aligned area of memory for each guest. When the guest does
an access in real mode (MMU off), the address is compared against a
limit value, and if it is lower, the address is ORed with an offset
value (from the Real Mode Offset Register (RMOR)) and the result becomes
the real address for the access. The size of the RMA has to be one of
a set of supported values, which usually includes 64MB, 128MB, 256MB
and some larger powers of 2.
Since we are unlikely to be able to allocate 64MB or more of physically
contiguous memory after the kernel has been running for a while, we
allocate a pool of RMAs at boot time using the bootmem allocator. The
size and number of the RMAs can be set using the kvm_rma_size=xx and
kvm_rma_count=xx kernel command line options.
KVM exports a new capability, KVM_CAP_PPC_RMA, to signal the availability
of the pool of preallocated RMAs. The capability value is 1 if the
processor can use an RMA but doesn't require one (because it supports
the VRMA facility), or 2 if the processor requires an RMA for each guest.
This adds a new ioctl, KVM_ALLOCATE_RMA, which allocates an RMA from the
pool and returns a file descriptor which can be used to map the RMA. It
also returns the size of the RMA in the argument structure.
Having an RMA means we will get multiple KMV_SET_USER_MEMORY_REGION
ioctl calls from userspace. To cope with this, we now preallocate the
kvm->arch.ram_pginfo array when the VM is created with a size sufficient
for up to 64GB of guest memory. Subsequently we will get rid of this
array and use memory associated with each memslot instead.
This moves most of the code that translates the user addresses into
host pfns (page frame numbers) out of kvmppc_prepare_vrma up one level
to kvmppc_core_prepare_memory_region. Also, instead of having to look
up the VMA for each page in order to check the page size, we now check
that the pages we get are compound pages of 16MB. However, if we are
adding memory that is mapped to an RMA, we don't bother with calling
get_user_pages_fast and instead just offset from the base pfn for the
RMA.
Typically the RMA gets added after vcpus are created, which makes it
inconvenient to have the LPCR (logical partition control register) value
in the vcpu->arch struct, since the LPCR controls whether the processor
uses RMA or VRMA for the guest. This moves the LPCR value into the
kvm->arch struct and arranges for the MER (mediated external request)
bit, which is the only bit that varies between vcpus, to be set in
assembly code when going into the guest if there is a pending external
interrupt request.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2011-07-12 13:16:57 +03:00
backlight: new driver for the ADP8870 backlight devices
2011-06-15 20:03:59 -07:00
Documentation: update cgroupfs mount point
2011-06-15 21:52:50 -07:00
ACPI: Split out custom_method functionality into an own driver
2011-05-29 01:50:40 -04:00
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into devel-stable
2011-05-25 21:47:48 +01:00
Blackfin: document SPI CS limitations with CPHA=0
2010-08-06 12:55:52 -04:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
cciss: add cciss_tape_cmds module paramter
2011-05-06 08:23:59 -06:00
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
Documentation: fix cgroup blkio throttle filenames
2011-07-06 13:17:51 -07:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
[CPUFREQ] Add documentation for sampling_down_factor
2011-03-16 17:54:31 -04:00
docs: update the development process document
2011-03-25 14:30:31 -06:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
Merge branches 'devel', 'devel-stable' and 'fixes' into for-linus
2011-05-27 22:59:57 +01:00
Merge git://git.infradead.org/mtd-2.6
2011-05-27 20:06:53 -07:00
driver core: remove the driver-model structures from the documentation
2011-05-06 18:01:05 -07:00
Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
2011-04-07 11:14:49 -07:00
lkdtm: add debugfs access and loosen KPROBE ties
2010-03-06 11:26:32 -08:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
rcu: Use softirq to address performance regression
2011-06-14 15:25:39 -07:00
firmware: Update hotplug script
2010-08-05 13:53:34 -07:00
HID: Move hiddev.txt to the new Documentation/hid directory
2011-03-22 11:43:51 +01:00
hwmon: (k10temp) Update documentation for Fam12h
2011-07-03 13:32:54 +02:00
i2c-i801: SMBus patch for Intel Panther Point DeviceIDs
2011-05-24 20:58:49 +02:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
Input: elantech - describe further the protocol
2011-05-16 22:48:24 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
2011-05-25 16:55:55 -07:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
HOWTO: sync up Documentaion/ja_JP/HOWTO
2011-04-19 16:53:45 -07:00
Merge branch 'kconfig-for-40' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6
2011-05-25 16:54:01 -07:00
kdump: update kexec-tools URL and Vivek's email
2010-11-25 14:36:38 +01:00
Docs/Kconfig: Update: osdl.org -> linuxfoundation.org
2010-11-15 23:50:13 +01:00
acer-wmi: Delete out-of-date documentation
2011-05-27 12:36:46 -04:00
Documentation: consolidate leds files to leds/ subdir
2011-04-04 17:51:47 -07:00
kbuild: introduce HDR_ARCH_LIST for headers_install_all
2010-12-14 22:16:19 +01:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
mmc: MMC boot partitions support.
2011-05-24 21:01:21 -04:00
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Merge branch 'docs-move' of git://git.kernel.org/pub/scm/linux/kernel/git/rdunlap/linux-docs
2011-05-27 10:25:02 -07:00
NFC: Driver for NXP Semiconductors PN544 NFC chip.
2011-01-13 08:03:19 -08:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
pcmcia: use autoconfiguration feature for ioports and iomem
2010-09-29 17:20:24 +02:00
PM / Runtime: Update documentation regarding driver removal
2011-07-02 14:27:11 +02:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
pps: add parallel port PPS signal generator
2011-01-13 08:03:21 -08:00
Kernel documentation for the PTI feature.
2011-05-13 16:31:00 -07:00
ptp: Added a brand new class driver for ptp clocks.
2011-05-23 13:01:00 -07:00
rapidio: add RapidIO documentation
2011-03-23 19:46:41 -07:00
rcu: Decrease memory-barrier usage based on semi-formal proof
2011-05-26 09:42:23 -07:00
Documentation: fix minor typos/spelling
2011-04-04 17:51:47 -07:00
Documentation: update cgroupfs mount point
2011-06-15 21:52:50 -07:00
[SCSI] megaraid_sas: Version and Changelog update
2011-05-24 12:36:06 -04:00
Create Documentation/security/,
2011-05-19 15:59:38 -07:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
sh: clkfwk: Kill off unused clk_set_rate_ex().
2010-11-15 18:25:12 +09:00
Merge branch 'topic/hda' into for-linus
2011-05-22 10:01:35 +02:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
coredump: add support for exe_file in core name
2011-05-26 17:12:36 -07:00
[SCSI] tcm_mod_builder.py: Fix generated *_drop_nodeacl() handler
2011-03-23 11:36:45 -05:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
thermal: Add event notification to thermal framework
2011-01-12 00:08:35 -05:00
doc: timers-howto: fix a typo ("unsgined")
2011-05-17 10:52:02 +02:00
sched: Get rid of lock_depth
2011-04-24 13:18:38 +02:00
USB: Fix up URB error codes to reflect implementation.
2011-06-17 11:28:21 -07:00
[media] uvcvideo: Add driver documentation
2011-05-20 09:30:36 -03:00
KVM: PPC: Allocate RMAs (Real Mode Areas) at boot for use by guests
2011-07-12 13:16:57 +03:00
Documentation: update cgroupfs mount point
2011-06-15 21:52:50 -07:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
x86, gart: Rename pci-gart_64.c to amd_gart_64.c
2011-05-10 17:22:06 +02:00
Translated Documentation/email-clients.txt
2011-05-06 17:59:20 -07:00
add random binaries to .gitignore
2010-04-08 11:34:34 +02:00
Merge branch 'docs-security' into docs-move
2011-05-20 09:10:04 -07:00
Documentation/atomic_ops.txt: avoid volatile in sample code
2011-05-26 17:12:34 -07:00
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
documentation: fix almost duplicate filenames (IO/io-mapping.txt)
2010-07-20 17:49:30 +00:00
mm: convert mm->cpu_vm_cpumask into cpumask_var_t
2011-05-25 08:39:21 -07:00
Documentation/Changes: minor corrections
2011-03-22 17:44:17 -07:00
Document Linux's circular buffering capabilities
2010-03-24 16:31:22 -07:00
scripts/coccinelle: update for compatability with Coccinelle 0.2.4
2010-12-03 12:27:01 +01:00
Documentation: update CodingStyle memory allocators
2011-07-06 13:17:51 -07:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
topology/sysfs: Provide book id and siblings attributes
2010-09-09 20:41:25 +02:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
2010-10-28 09:35:11 -07:00
Documentation: DMA-API-HOWTO.txt: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN
2010-08-14 11:56:46 -07:00
dma-mapping: remove dma_is_consistent API
2010-08-11 08:59:21 -07:00
dmaengine: Add API documentation for slave dma usage
2011-05-25 14:49:20 -07:00
Documentation: update dontdiff file
2011-05-23 15:14:11 -07:00
Merge branch 'docs-next' of git://git.lwn.net/linux-2.6
2011-03-27 19:46:59 -07:00
Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
2011-04-07 11:14:49 -07:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
Documentation/email-clients.txt: update Thunderbird docs with wordwrap plugin
2011-01-13 08:03:15 -08:00
Documentation/feature-removal-schedule.txt: remove ns_cgroup from feature-removal-schedule.txt
2011-06-15 20:04:02 -07:00
flex_array: flex_array_prealloc takes a number of elements, not an end
2011-04-28 16:12:47 -04:00
Revert "gpiolib: annotate gpio-intialization with __must_check"
2011-01-13 17:26:46 -08:00
Documentation: update LXR web link
2011-05-23 15:14:11 -07:00
drivers: hwspinlock: add framework
2011-02-17 09:52:03 -08:00
init/main.c: improve usability in case of init binary failure
2010-03-06 11:26:29 -08:00
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
Documentation/iostats.txt: bit-size reference etc.
2011-03-23 20:44:18 +01:00
IPMI: Add the document description of ipmi_get_smi_info
2010-12-14 00:22:00 -05:00
bitmap, irq: add smp_affinity_list interface to /proc/irq
2011-05-25 08:39:45 -07:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
docbook: warn on unused doc entries
2010-09-11 16:49:21 -07:00
Documentation: update kernel-docs.txt
2011-01-06 09:59:38 -08:00
usb-storage: redo incorrect reads
2011-06-07 09:05:42 -07:00
Documentation: update kmemleak supported archs
2011-06-15 21:52:50 -07:00
kobject: documentation: Update to refer to kset-example.c.
2010-03-19 07:12:20 -07:00
tree-wide: fix comment/printk typos
2010-11-01 15:38:34 -04:00
kref: Fix typo in kref documentation
2011-03-07 13:20:05 -08:00
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
Documentation: Add statistics about nested locks
2011-05-28 17:03:29 +02:00
take coda-private headers out of include/linux
2011-01-12 20:02:48 -05:00
[media] Remove the old V4L1 v4lgrab.c file
2010-12-29 08:17:12 -02:00
md:Documentation/md.txt - fix typo
2011-06-09 11:43:04 +10:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
smp: Document transitivity for memory barriers.
2011-03-04 08:05:49 -08:00
memory hotplug: Allow memory blocks to span multiple memory sections
2011-02-03 16:08:57 -08:00
mutex: Fix annotations to include it in kernel-locking docbook
2010-09-03 08:19:51 +02:00
panic: Add taint flag TAINT_FIRMWARE_WORKAROUND ('I')
2010-05-19 08:37:43 +01:00
Documentation/padata.txt: fix typos etc.
2010-08-11 08:59:18 -07:00
Documentation: update printk-formats.txt
2011-06-15 21:52:50 -07:00
Documentation: remove anticipatory scheduler info
2010-11-11 12:09:59 +01:00
Document the rfkill sysfs ABI
2010-03-10 17:09:33 -05:00
variable name fix to Documentation/rt-mutex-design.txt
2010-06-05 17:39:09 +02:00
RTC: Fix up rtc.txt documentation to reflect changes to generic rtc layer
2011-03-09 11:25:10 -08:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
update email address
2010-07-19 10:56:54 +02:00
locking: Remove deprecated lock initializers
2011-01-27 12:30:38 +01:00
doc: stable_api_nonsense.txt: fix paragraph to make more sense.
2011-03-30 12:02:05 +02:00
Documentation: -stable rules: upstream commit ID requirement reworded
2010-04-22 15:24:56 -07:00
Documentation: update SubmitChecklist for O=objdir and kconfig testing
2010-05-24 07:31:20 -07:00
Fix common misspellings
2011-03-31 11:26:23 -03:00
Documentation: update GregKH links
2011-05-23 15:14:11 -07:00
Fix typos in comments
2010-03-16 11:47:56 +01:00
documentation: update sysrq.txt magic sysrq keys
2010-10-26 17:32:41 -07:00
Documentation: fix vgaarbiter.txt typos etc.
2011-05-23 15:14:11 -07:00
Documentation/volatile-considered-harmful.txt: correct cpu_relax() documentation
2010-03-24 16:31:20 -07:00
workqueue: Document debugging tricks
2011-03-31 13:40:42 +02:00
decompressors: add XZ decompressor module
2011-01-13 08:03:24 -08:00
aa04b4cc5b
