linux-stable.git/include/linux/kvm_types.h, branch v5.3.8

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 503

2019-06-19T15:09:56+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license this
  program is distributed in the hope that it will be useful but
  without any warranty without even the implied warranty of
  merchantability or fitness for a particular purpose see the gnu
  general public license for more details you should have received a
  copy of the gnu general public license along with this program if
  not write to the free software foundation 51 franklin street fifth
  floor boston ma 02110 1301 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Kate Stewart 
Reviewed-by: Allison Randal 
Reviewed-by: Enrico Weigelt 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081207.308909165@linutronix.de
Signed-off-by: Greg Kroah-Hartman

kvm: rename pfn_t to kvm_pfn_t

2016-01-16T01:56:32+00:00

To date, we have implemented two I/O usage models for persistent memory,
PMEM (a persistent "ram disk") and DAX (mmap persistent memory into
userspace).  This series adds a third, DAX-GUP, that allows DAX mappings
to be the target of direct-i/o.  It allows userspace to coordinate
DMA/RDMA from/to persistent memory.

The implementation leverages the ZONE_DEVICE mm-zone that went into
4.3-rc1 (also discussed at kernel summit) to flag pages that are owned
and dynamically mapped by a device driver.  The pmem driver, after
mapping a persistent memory range into the system memmap via
devm_memremap_pages(), arranges for DAX to distinguish pfn-only versus
page-backed pmem-pfns via flags in the new pfn_t type.

The DAX code, upon seeing a PFN_DEV+PFN_MAP flagged pfn, flags the
resulting pte(s) inserted into the process page tables with a new
_PAGE_DEVMAP flag.  Later, when get_user_pages() is walking ptes it keys
off _PAGE_DEVMAP to pin the device hosting the page range active.
Finally, get_page() and put_page() are modified to take references
against the device driver established page mapping.

Finally, this need for "struct page" for persistent memory requires
memory capacity to store the memmap array.  Given the memmap array for a
large pool of persistent may exhaust available DRAM introduce a
mechanism to allocate the memmap from persistent memory.  The new
"struct vmem_altmap *" parameter to devm_memremap_pages() enables
arch_add_memory() to use reserved pmem capacity rather than the page
allocator.

This patch (of 18):

The core has developed a need for a "pfn_t" type [1].  Move the existing
pfn_t in KVM to kvm_pfn_t [2].

[1]: https://lists.01.org/pipermail/linux-nvdimm/2015-September/002199.html
[2]: https://lists.01.org/pipermail/linux-nvdimm/2015-September/002218.html

Signed-off-by: Dan Williams 
Acked-by: Christoffer Dall 
Cc: Paolo Bonzini 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

KVM: add memslots argument to kvm_arch_memslots_updated

2015-05-26T10:40:17+00:00

Prepare for the case of multiple address spaces.

Reviewed-by: Radim Krcmar 
Signed-off-by: Paolo Bonzini

KVM: move APIC types to arch/x86/

2014-12-18T08:39:51+00:00

They are not used anymore by IA64, move them away.

Signed-off-by: Paolo Bonzini

KVM: forward declare structs in kvm_types.h

2014-08-29T14:35:53+00:00

Opaque KVM structs are useful for prototypes in asm/kvm_host.h, to avoid
"'struct foo' declared inside parameter list" warnings (and consequent
breakage due to conflicting types).

Move them from individual files to a generic place in linux/kvm_types.h.

Signed-off-by: Paolo Bonzini

KVM: Allow cross page reads and writes from cached translations.

2013-04-07T10:05:35+00:00

This patch adds support for kvm_gfn_to_hva_cache_init functions for
reads and writes that will cross a page.  If the range falls within
the same memslot, then this will be a fast operation.  If the range
is split between two memslots, then the slower kvm_read_guest and
kvm_write_guest are used.

Tested: Test against kvm_clock unit tests.

Signed-off-by: Andrew Honig 
Signed-off-by: Gleb Natapov

KVM: Add memory slot versioning and use it to provide fast guest write interface

2011-01-12T09:23:08+00:00

Keep track of memslots changes by keeping generation number in memslots
structure. Provide kvm_write_guest_cached() function that skips
gfn_to_hva() translation if memslots was not changed since previous
invocation.

Acked-by: Rik van Riel 
Signed-off-by: Gleb Natapov 
Signed-off-by: Marcelo Tosatti

KVM: Use u64 for frame data types

2010-08-02T03:39:44+00:00

For 32bit machines where the physical address width is
larger than the virtual address width the frame number types
in KVM may overflow. Fix this by changing them to u64.

[sfr: fix build on 32-bit ppc]

Signed-off-by: Joerg Roedel 
Signed-off-by: Stephen Rothwell 
Signed-off-by: Marcelo Tosatti

KVM: APIC: get rid of deliver_bitmask

2009-06-10T08:48:27+00:00

Deliver interrupt during destination matching loop.

Signed-off-by: Gleb Natapov 
Acked-by: Xiantao Zhang 
Signed-off-by: Marcelo Tosatti

KVM: Split IOAPIC structure

2009-06-10T08:48:21+00:00

Prepared for reuse ioapic_redir_entry for MSI.

Signed-off-by: Sheng Yang 
Signed-off-by: Avi Kivity