Commit Graph

754 Commits

Author SHA1 Message Date
Peter Maydell
f7b78602fd accel/tcg: Add cluster number to TCG TB hash
Include the cluster number in the hash we use to look
up TBs. This is important because a TB that is valid
for one cluster at a given physical address and set
of CPU flags is not necessarily valid for another:
the two clusters may have different views of physical
memory, or may have different CPU features (eg FPU
present or absent).

We put the cluster number in the high 8 bits of the
TB cflags. This gives us up to 256 clusters, which should
be enough for anybody. If we ever need more, or need
more bits in cflags for other purposes, we could make
tb_hash_func() take more data (and expand qemu_xxhash7()
to qemu_xxhash8()).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 20190121152218.9592-4-peter.maydell@linaro.org
2019-01-29 11:46:06 +00:00
Stefan Hajnoczi
047be4ed24 memory: add memory_region_flush_rom_device()
ROM devices go via MemoryRegionOps->write() callbacks for write
operations and do not dirty/invalidate that memory.  Device emulation
must be able to mark memory ranges that have been modified internally
(e.g. using memory_region_get_ram_ptr()).

Introduce the memory_region_flush_rom_device() API for this purpose.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20190123212234.32068-2-stefanha@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: fix block comment style]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-29 11:46:04 +00:00
Richard Henderson
e77c89fb08 cputlb: Remove static tlb sizing
Now that all tcg backends support TCG_TARGET_IMPLEMENTS_DYN_TLB,
remove the define and the old code.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-01-28 07:04:35 -08:00
Emilio G. Cota
86e1eff8bc tcg: introduce dynamic TLB sizing
Disabled in all TCG backends for now.

Tested-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <20190116170114.26802-3-cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-01-28 07:03:34 -08:00
Paolo Bonzini
eae3eb3e18 qemu/queue.h: simplify reverse access to QTAILQ
The new definition of QTAILQ does not require passing the headname,
remove it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-01-11 15:46:55 +01:00
Paolo Bonzini
b58deb344d qemu/queue.h: leave head structs anonymous unless necessary
Most list head structs need not be given a name.  In most cases the
name is given just in case one is going to use QTAILQ_LAST, QTAILQ_PREV
or reverse iteration, but this does not apply to lists of other kinds,
and even for QTAILQ in practice this is only rarely needed.  In addition,
we will soon reimplement those macros completely so that they do not
need a name for the head struct.  So clean up everything, not giving a
name except in the rare case where it is necessary.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-01-11 15:46:55 +01:00
Richard Henderson
15d7409260 tcg: Add TCG_CALL_NO_RETURN
Remember which helpers have been marked noreturn.

Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-12-26 06:40:24 +11:00
Alistair Francis
e4041f669f exec: Add RISC-V GCC poison macro
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Michael Clark <mjc@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <00d02e34f10b87fd61f8dc69ac93d1eb63df949c.1545246859.git.alistair.francis@wdc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-12-26 06:40:02 +11:00
Peter Maydell
f163448536 - Remove retranslation remenents
- Return success from patch_reloc
 - Preserve 32-bit values as zero-extended on x86_64
 - Make bswap during memory ops as optional
 - Cleanup xxhash
 - Revert constant pooling for tcg/sparc/
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Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20181216' into staging

- Remove retranslation remenents
- Return success from patch_reloc
- Preserve 32-bit values as zero-extended on x86_64
- Make bswap during memory ops as optional
- Cleanup xxhash
- Revert constant pooling for tcg/sparc/

# gpg: Signature made Mon 17 Dec 2018 03:25:21 GMT
# gpg:                using RSA key 64DF38E8AF7E215F
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>"
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-tcg-20181216: (33 commits)
  xxhash: match output against the original xxhash32
  include: move exec/tb-hash-xx.h to qemu/xxhash.h
  exec: introduce qemu_xxhash{2,4,5,6,7}
  qht-bench: document -p flag
  tcg: Drop nargs from tcg_op_insert_{before,after}
  tcg/mips: Improve the add2/sub2 command to use TCG_TARGET_REG_BITS
  tcg: Add TCG_TARGET_HAS_MEMORY_BSWAP
  tcg/optimize: Optimize bswap
  tcg: Clean up generic bswap64
  tcg: Clean up generic bswap32
  tcg/i386: Add setup_guest_base_seg for FreeBSD
  tcg/i386: Precompute all guest_base parameters
  tcg/i386: Assume 32-bit values are zero-extended
  tcg/i386: Implement INDEX_op_extr{lh}_i64_i32 for 32-bit guests
  tcg/i386: Propagate is64 to tcg_out_qemu_ld_slow_path
  tcg/i386: Propagate is64 to tcg_out_qemu_ld_direct
  tcg/s390x: Return false on failure from patch_reloc
  tcg/ppc: Return false on failure from patch_reloc
  tcg/arm: Return false on failure from patch_reloc
  tcg/aarch64: Return false on failure from patch_reloc
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-12-17 13:04:25 +00:00
Emilio G. Cota
fe656e3185 include: move exec/tb-hash-xx.h to qemu/xxhash.h
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-12-17 06:04:44 +03:00
Emilio G. Cota
c971d8fa73 exec: introduce qemu_xxhash{2,4,5,6,7}
Before moving them all to include/qemu/xxhash.h.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-12-17 06:04:44 +03:00
Peter Maydell
3c8133f973 Rename cpu_physical_memory_write_rom() to address_space_write_rom()
The API of cpu_physical_memory_write_rom() is odd, because it
takes an AddressSpace, unlike all the other cpu_physical_memory_*
access functions. Rename it to address_space_write_rom(), and
bring its API into line with address_space_write().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20181122133507.30950-3-peter.maydell@linaro.org
2018-12-14 13:30:48 +00:00
Marc-André Lureau
c26763f8ec memory: learn about non-volatile memory region
Add a new flag to mark memory region that are used as non-volatile, by
NVDIMM for example. That bit is propagated down to the flat view, and
reflected in HMP info mtree with a "nv-" prefix on the memory type.

This way, guest_phys_blocks_region_add() can skip the NV memory
regions for dumps and TCG memory clear in a following patch.

Cc: dgilbert@redhat.com
Cc: imammedo@redhat.com
Cc: pbonzini@redhat.com
Cc: guangrong.xiao@linux.intel.com
Cc: mst@redhat.com
Cc: xiaoguangrong.eric@gmail.com
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20181003114454.5662-2-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-11-06 21:35:05 +01:00
Richard Henderson
ab65110530 cputlb: Remove tlb_c.pending_flushes
This is essentially redundant with tlb_c.dirty.

Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-10-31 12:16:39 +00:00
Richard Henderson
3d1523ced6 cputlb: Filter flushes on already clean tlbs
Especially for guests with large numbers of tlbs, like ARM or PPC,
we may well not use all of them in between flush operations.
Remember which tlbs have been used since the last flush, and
avoid any useless flushing.

Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-10-31 12:16:35 +00:00
Richard Henderson
e09de0a20d cputlb: Count "partial" and "elided" tlb flushes
Our only statistic so far was "full" tlb flushes, where all mmu_idx
are flushed at the same time.

Now count "partial" tlb flushes where sets of mmu_idx are flushed,
but the set is not maximal.  Account one per mmu_idx flushed, as
that is the unit of work performed.

We don't actually count elided flushes yet, but go ahead and change
the interface presented to the monitor all at once.

Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-10-31 12:16:30 +00:00
Richard Henderson
d5363e5849 cputlb: Move env->vtlb_index to env->tlb_d.vindex
The rest of the tlb victim cache is per-tlb,
the next use index should be as well.

Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-10-31 12:16:12 +00:00
Richard Henderson
1308e02671 cputlb: Split large page tracking per mmu_idx
The set of large pages in the kernel is probably not the same
as the set of large pages in the application.  Forcing one
range to cover both will flush more often than necessary.

This allows tlb_flush_page_async_work to flush just the one
mmu_idx implicated, which in turn allows us to remove
tlb_check_page_and_flush_by_mmuidx_async_work.

Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-10-31 12:16:08 +00:00
Richard Henderson
60a2ad7d86 cputlb: Move cpu->pending_tlb_flush to env->tlb_c.pending_flush
Protect it with the tlb_lock instead of using atomics.
The move puts it in or near the same cacheline as the lock;
using the lock means we don't need a second atomic operation
in order to perform the update.  Which makes it cheap to also
update pending_flush in tlb_flush_by_mmuidx_async_work.

Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-10-31 12:16:02 +00:00
Richard Henderson
53d284554c cputlb: Move tlb_lock to CPUTLBCommon
This is the first of several moves to reduce the size of the
CPU_COMMON_TLB macro and improve some locality of refernce.

Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-10-31 12:15:28 +00:00
Peter Maydell
a2e002ff79 QEMU trivial patches collected between June and October 2018
(Thank you to Thomas Huth)
 
 v2: fix 32bit build with updated patch (v3) from Philippe Mathieu-Daudé
     built in a 32bit debian sid chroot
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Merge remote-tracking branch 'remotes/vivier2/tags/qemu-trivial-for-3.1-pull-request' into staging

QEMU trivial patches collected between June and October 2018
(Thank you to Thomas Huth)

v2: fix 32bit build with updated patch (v3) from Philippe Mathieu-Daudé
    built in a 32bit debian sid chroot

# gpg: Signature made Tue 30 Oct 2018 11:23:01 GMT
# gpg:                using RSA key F30C38BD3F2FBE3C
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>"
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>"
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>"
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/qemu-trivial-for-3.1-pull-request:
  milkymist-minimac2: Use qemu_log_mask(GUEST_ERROR) instead of error_report
  ppc: move at24c to its own CONFIG_ symbol
  hw/intc/gicv3: Remove useless parenthesis around DIV_ROUND_UP macro
  hw/pci-host: Remove useless parenthesis around DIV_ROUND_UP macro
  tests/bios-tables-test: Remove an useless cast
  xen: Use the PCI_DEVICE macro
  qobject: Catch another straggler for use of qdict_put_str()
  configure: Support pkg-config for zlib
  tests: Fix typos in comments and help message (found by codespell)
  cpu.h: fix a typo in comment
  linux-user: fix comment s/atomic_write/atomic_set/
  qemu-iotests: make 218 executable
  scripts/qemu.py: remove trailing quotes on docstring
  scripts/decodetree.py: remove unused imports
  docs/devel/testing.rst: add missing newlines after code block
  qemu-iotests: fix filename containing checks
  tests/tcg/README: fix location for lm32 tests
  memory.h: fix typos in comments
  vga_int: remove unused function protype
  configs/alpha: Remove unused CONFIG_PARALLEL_ISA switch

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-10-30 15:49:55 +00:00
Li Qiang
847b31f0d6 memory.h: fix typos in comments
Signed-off-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <1539080467-2976-1-git-send-email-liq3ea@gmail.com>
[lv: s/types/typos/]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2018-10-26 17:17:32 +02:00
Aleksandar Markovic
89a955e8df target/mips: Add disassembler support for nanoMIPS
Add disassembler support for nanoMIPS.

Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Matthew Fortune <matthew.fortune@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-25 22:13:33 +02:00
Peter Maydell
b312532fd0 * RTC fixes (Artem)
* icount fixes (Artem)
 * rr fixes (Pavel, myself)
 * hotplug cleanup (Igor)
 * SCSI fixes (myself)
 * 4.20-rc1 KVM header update (myself)
 * coalesced PIO support (Peng Hao)
 * HVF fixes (Roman B.)
 * Hyper-V refactoring (Roman K.)
 * Support for Hyper-V IPI (Vitaly)
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* RTC fixes (Artem)
* icount fixes (Artem)
* rr fixes (Pavel, myself)
* hotplug cleanup (Igor)
* SCSI fixes (myself)
* 4.20-rc1 KVM header update (myself)
* coalesced PIO support (Peng Hao)
* HVF fixes (Roman B.)
* Hyper-V refactoring (Roman K.)
* Support for Hyper-V IPI (Vitaly)

# gpg: Signature made Fri 19 Oct 2018 12:47:58 BST
# gpg:                using RSA key BFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream: (47 commits)
  replay: pass raw icount value to replay_save_clock
  target/i386: kvm: just return after migrate_add_blocker failed
  hyperv_testdev: add SynIC message and event testmodes
  hyperv: process POST_MESSAGE hypercall
  hyperv: add support for KVM_HYPERV_EVENTFD
  hyperv: process SIGNAL_EVENT hypercall
  hyperv: add synic event flag signaling
  hyperv: add synic message delivery
  hyperv: make overlay pages for SynIC
  hyperv: only add SynIC in compatible configurations
  hyperv: qom-ify SynIC
  hyperv:synic: split capability testing and setting
  i386: add hyperv-stub for CONFIG_HYPERV=n
  default-configs: collect CONFIG_HYPERV* in hyperv.mak
  hyperv: factor out arch-independent API into hw/hyperv
  hyperv: make hyperv_vp_index inline
  hyperv: split hyperv-proto.h into x86 and arch-independent parts
  hyperv: rename kvm_hv_sint_route_set_sint
  hyperv: make HvSintRoute reference-counted
  hyperv: address HvSintRoute by X86CPU pointer
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-10-19 19:01:07 +01:00
Peter Maydell
31e213e306 Queued tcg patches.
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Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20181018' into staging

Queued tcg patches.

# gpg: Signature made Fri 19 Oct 2018 07:03:20 BST
# gpg:                using RSA key 64DF38E8AF7E215F
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>"
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-tcg-20181018: (21 commits)
  cputlb: read CPUTLBEntry.addr_write atomically
  target/s390x: Check HAVE_ATOMIC128 and HAVE_CMPXCHG128 at translate
  target/s390x: Skip wout, cout helpers if op helper does not return
  target/s390x: Split do_cdsg, do_lpq, do_stpq
  target/s390x: Convert to HAVE_CMPXCHG128 and HAVE_ATOMIC128
  target/ppc: Convert to HAVE_CMPXCHG128 and HAVE_ATOMIC128
  target/arm: Check HAVE_CMPXCHG128 at translate time
  target/arm: Convert to HAVE_CMPXCHG128
  target/i386: Convert to HAVE_CMPXCHG128
  tcg: Split CONFIG_ATOMIC128
  tcg: Add tlb_index and tlb_entry helpers
  cputlb: serialize tlb updates with env->tlb_lock
  cputlb: fix assert_cpu_is_self macro
  exec: introduce tlb_init
  target/unicore32: remove tlb_flush from uc32_init_fn
  target/alpha: remove tlb_flush from alpha_cpu_initfn
  tcg: distribute tcg_time into TCG contexts
  tcg: plug holes in struct TCGProfile
  tcg: fix use of uninitialized variable under CONFIG_PROFILER
  tcg: access cpu->icount_decr.u16.high with atomics
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-10-19 16:17:32 +01:00
Peng Hao
e6d34aeea6 target-i386 : add coalesced_pio API
the primary API realization.

Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <1539795177-21038-3-git-send-email-peng.hao2@zte.com.cn>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-19 13:44:11 +02:00
Zhang Chen
13af18f222 COLO: Load dirty pages into SVM's RAM cache firstly
We should not load PVM's state directly into SVM, because there maybe some
errors happen when SVM is receving data, which will break SVM.

We need to ensure receving all data before load the state into SVM. We use
an extra memory to cache these data (PVM's ram). The ram cache in secondary side
is initially the same as SVM/PVM's memory. And in the process of checkpoint,
we cache the dirty pages of PVM into this ram cache firstly, so this ram cache
always the same as PVM's memory at every checkpoint, then we flush this cached ram
to SVM after we receive all PVM's state.

Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Signed-off-by: Zhang Chen <zhangckid@gmail.com>
Signed-off-by: Zhang Chen <chen.zhang@intel.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2018-10-19 11:15:03 +08:00
Emilio G. Cota
403f290c06 cputlb: read CPUTLBEntry.addr_write atomically
Updates can come from other threads, so readers that do not
take tlb_lock must use atomic_read to avoid undefined
behaviour (UB).

This completes the conversion to tlb_lock. This conversion results
on average in no performance loss, as the following experiments
(run on an Intel i7-6700K CPU @ 4.00GHz) show.

1. aarch64 bootup+shutdown test:

- Before:
 Performance counter stats for 'taskset -c 0 ../img/aarch64/die.sh' (10 runs):

       7487.087786      task-clock (msec)         #    0.998 CPUs utilized            ( +-  0.12% )
    31,574,905,303      cycles                    #    4.217 GHz                      ( +-  0.12% )
    57,097,908,812      instructions              #    1.81  insns per cycle          ( +-  0.08% )
    10,255,415,367      branches                  # 1369.747 M/sec                    ( +-  0.08% )
       173,278,962      branch-misses             #    1.69% of all branches          ( +-  0.18% )

       7.504481349 seconds time elapsed                                          ( +-  0.14% )

- After:
 Performance counter stats for 'taskset -c 0 ../img/aarch64/die.sh' (10 runs):

       7462.441328      task-clock (msec)         #    0.998 CPUs utilized            ( +-  0.07% )
    31,478,476,520      cycles                    #    4.218 GHz                      ( +-  0.07% )
    57,017,330,084      instructions              #    1.81  insns per cycle          ( +-  0.05% )
    10,251,929,667      branches                  # 1373.804 M/sec                    ( +-  0.05% )
       173,023,787      branch-misses             #    1.69% of all branches          ( +-  0.11% )

       7.474970463 seconds time elapsed                                          ( +-  0.07% )

2. SPEC06int:
                                              SPEC06int (test set)
                                           [Y axis: Speedup over master]
  1.15 +-+----+------+------+------+------+------+-------+------+------+------+------+------+------+----+-+
       |                                                                                                  |
   1.1 +-+.................................+++.............................+  tlb-lock-v2 (m+++x)       +-+
       |                                +++ |                   +++        tlb-lock-v3 (spinl|ck)         |
       |                    +++          |  |     +++    +++     |                           |            |
  1.05 +-+....+++...........####.........|####.+++.|......|.....###....+++...........+++....###.........+-+
       |      ###         ++#| #         |# |# ***### +++### +++#+#     |     +++     |     #|#    ###    |
     1 +-+++***+#++++####+++#++#++++++++++#++#+*+*++#++++#+#+****+#++++###++++###++++###++++#+#++++#+#+++-+
       |    *+* #    #++# ***  #   #### ***  # * *++# ****+# *| * # ****|#   |# #    #|#    #+#    # #    |
  0.95 +-+..*.*.#....#..#.*|*..#...#..#.*|*..#.*.*..#.*|.*.#.*++*.#.*++*+#.****.#....#+#....#.#..++#.#..+-+
       |    * * #    #  # *|*  #   #  # *|*  # * *  # *++* # *  * # *  * # * |* #  ++# #    # #  *** #    |
       |    * * #  ++#  # *+*  #   #  # *|*  # * *  # *  * # *  * # *  * # *++* # **** #  ++# #  * * #    |
   0.9 +-+..*.*.#...|#..#.*.*..#.++#..#.*|*..#.*.*..#.*..*.#.*..*.#.*..*.#.*..*.#.*.|*.#...|#.#..*.*.#..+-+
       |    * * #  ***  # * *  #  |#  # *+*  # * *  # *  * # *  * # *  * # *  * # *++* #   |# #  * * #    |
  0.85 +-+..*.*.#..*|*..#.*.*..#.***..#.*.*..#.*.*..#.*..*.#.*..*.#.*..*.#.*..*.#.*..*.#.****.#..*.*.#..+-+
       |    * * #  *+*  # * *  # *|*  # * *  # * *  # *  * # *  * # *  * # *  * # *  * # * |* #  * * #    |
       |    * * #  * *  # * *  # *+*  # * *  # * *  # *  * # *  * # *  * # *  * # *  * # * |* #  * * #    |
   0.8 +-+..*.*.#..*.*..#.*.*..#.*.*..#.*.*..#.*.*..#.*..*.#.*..*.#.*..*.#.*..*.#.*..*.#.*++*.#..*.*.#..+-+
       |    * * #  * *  # * *  # * *  # * *  # * *  # *  * # *  * # *  * # *  * # *  * # *  * #  * * #    |
  0.75 +-+--***##--***###-***###-***###-***###-***###-****##-****##-****##-****##-****##-****##--***##--+-+
 400.perlben401.bzip2403.gcc429.m445.gob456.hmme45462.libqua464.h26471.omnet473483.xalancbmkgeomean

  png: https://imgur.com/a/BHzpPTW

Notes:
- tlb-lock-v2 corresponds to an implementation with a mutex.
- tlb-lock-v3 corresponds to the current implementation, i.e.
  a spinlock and a single lock acquisition in tlb_set_page_with_attrs.

Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <20181016153840.25877-1-cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-10-18 19:46:53 -07:00
Richard Henderson
383beda9cf tcg: Add tlb_index and tlb_entry helpers
Isolate the computation of an index from an address into a
helper before we change that function.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
[ cota: convert tlb_vaddr_to_host; use atomic_read on addr_write ]
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <20181009175129.17888-2-cota@braap.org>
2018-10-18 18:58:10 -07:00
Emilio G. Cota
71aec3541d cputlb: serialize tlb updates with env->tlb_lock
Currently we rely on atomic operations for cross-CPU invalidations.
There are two cases that these atomics miss: cross-CPU invalidations
can race with either (1) vCPU threads flushing their TLB, which
happens via memset, or (2) vCPUs calling tlb_reset_dirty on their TLB,
which updates .addr_write with a regular store. This results in
undefined behaviour, since we're mixing regular and atomic ops
on concurrent accesses.

Fix it by using tlb_lock, a per-vCPU lock. All updaters of tlb_table
and the corresponding victim cache now hold the lock.
The readers that do not hold tlb_lock must use atomic reads when
reading .addr_write, since this field can be updated by other threads;
the conversion to atomic reads is done in the next patch.

Note that an alternative fix would be to expand the use of atomic ops.
However, in the case of TLB flushes this would have a huge performance
impact, since (1) TLB flushes can happen very frequently and (2) we
currently use a full memory barrier to flush each TLB entry, and a TLB
has many entries. Instead, acquiring the lock is barely slower than a
full memory barrier since it is uncontended, and with a single lock
acquisition we can flush the entire TLB.

Tested-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <20181009174557.16125-6-cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-10-18 18:58:10 -07:00
Emilio G. Cota
5005e2537d exec: introduce tlb_init
Paves the way for the addition of a per-TLB lock.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <20181009174557.16125-4-cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-10-18 18:58:10 -07:00
Peter Maydell
62a0db942d memory: Remove old_mmio accessors
Now that all the users of old_mmio MemoryRegion accessors
have been converted, we can remove the core code support.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180824170422.5783-2-peter.maydell@linaro.org>
Based-on: <20180802174042.29234-1-peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 19:09:14 +02:00
Hikaru Nishida
d5dbde4645 hostmem-file: make available memory-backend-file on POSIX-based hosts
Before this change, memory-backend-file object is valid for Linux hosts
only because hostmem-file.c is compiled only on Linux hosts.
However, other POSIX-based hosts (such as macOS) can support
memory-backend-file object in the same way as on Linux hosts.
This patch makes hostmem-file.c and related functions to be compiled on
all POSIX-based hosts to make available memory-backend-file on them.

Signed-off-by: Hikaru Nishida <hikarupsp@gmail.com>
Message-Id: <20180924123205.29651-1-hikarupsp@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-02 19:09:13 +02:00
Thomas Huth
a69dc537cc ppc: Remove deprecated ppcemb target
There is no known available OS for ppc around anymore that uses page
sizes below 4k, so it does not make much sense that we keep wasting
our time on building and testing the ppcemb-softmmu target. It has
been deprecated since two releases, and nobody complained, so let's
remove this now.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2018-08-28 11:31:23 +10:00
Peter Maydell
659b11e7a7 linux-user fixes:
- netlink fixes (add missing types, fix MSG_TRUNC)
 - sh4 fix (tcg state)
 - sparc32plus fix (truncate address space to 32bit)
 - add x86_64 binfmt data
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Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-3.1-pull-request' into staging

linux-user fixes:
- netlink fixes (add missing types, fix MSG_TRUNC)
- sh4 fix (tcg state)
- sparc32plus fix (truncate address space to 32bit)
- add x86_64 binfmt data

# gpg: Signature made Mon 20 Aug 2018 21:24:40 BST
# gpg:                using RSA key F30C38BD3F2FBE3C
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>"
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>"
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>"
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/linux-user-for-3.1-pull-request:
  linux-user: add QEMU_IFLA_INFO_KIND nested type for tun
  linux-user: update netlink route types
  linux-user: introduce QEMU_RTA_* to use with rtattr_type_t
  linux-user: fix recvmsg()/recvfrom() with netlink and MSG_TRUNC
  sh4: fix use_icount with linux-user
  linux-user: fix 32bit g2h()/h2g()
  qemu-binfmt-conf.sh: add x86_64 target

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-08-21 11:36:15 +01:00
Peter Maydell
55f4e79d79 pc: fixes
This includes nvdimm persistence fixes queued before the release.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

pc: fixes

This includes nvdimm persistence fixes queued before the release.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Mon 20 Aug 2018 11:38:11 BST
# gpg:                using RSA key 281F0DB8D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>"
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* remotes/mst/tags/for_upstream:
  migration/ram: ensure write persistence on loading all data to PMEM.
  migration/ram: Add check and info message to nvdimm post copy.
  mem/nvdimm: ensure write persistence to PMEM in label emulation
  hostmem-file: add the 'pmem' option
  configure: add libpmem support
  memory, exec: switch file ram allocation functions to 'flags' parameters
  memory, exec: Expose all memory block related flags.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-08-21 10:23:53 +01:00
Peter Maydell
8c1c245378 memory: Remove MMIO request_ptr APIs
Remove the obsolete MMIO request_ptr APIs; they have no
users now.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: KONRAD Frederic <frederic.konrad@adacore.com>
Message-id: 20180817114619.22354-3-peter.maydell@linaro.org
2018-08-20 11:24:32 +01:00
Laurent Vivier
3e23de1523 linux-user: fix 32bit g2h()/h2g()
sparc32plus has 64bit long type but only 32bit virtual address space.

For instance, "apt-get upgrade" failed because of a mmap()/msync()
sequence.

mmap() returned 0xff252000 but msync() used g2h(0xffffffffff252000)
to find the host address. The "(target_ulong)" in g2h() doesn't fix the
address because it is 64bit long.

This patch introduces an "abi_ptr" that is set to uint32_t
if the virtual address space is addressed using 32bit in the linux-user
case. It stays set to target_ulong with softmmu case.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20180814171217.14680-1-laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[lv: added "%" in TARGET_ABI_FMT_ptr "%"PRIx64]
2018-08-17 13:56:33 +02:00
Peter Maydell
55a7cb144d accel/tcg: Check whether TLB entry is RAM consistently with how we set it up
We set up TLB entries in tlb_set_page_with_attrs(), where we have
some logic for determining whether the TLB entry is considered
to be RAM-backed, and thus has a valid addend field. When we
look at the TLB entry in get_page_addr_code(), we use different
logic for determining whether to treat the page as RAM-backed
and use the addend field. This is confusing, and in fact buggy,
because the code in tlb_set_page_with_attrs() correctly decides
that rom_device memory regions not in romd mode are not RAM-backed,
but the code in get_page_addr_code() thinks they are RAM-backed.
This typically results in "Bad ram pointer" assertion if the
guest tries to execute from such a memory region.

Fix this by making get_page_addr_code() just look at the
TLB_MMIO bit in the code_address field of the TLB, which
tlb_set_page_with_attrs() sets if and only if the addend
field is not valid for code execution.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180713150945.12348-1-peter.maydell@linaro.org
2018-08-14 17:17:19 +01:00
Junyan He
a4de8552b2 hostmem-file: add the 'pmem' option
When QEMU emulates vNVDIMM labels and migrates vNVDIMM devices, it
needs to know whether the backend storage is a real persistent memory,
in order to decide whether special operations should be performed to
ensure the data persistence.

This boolean option 'pmem' allows users to specify whether the backend
storage of memory-backend-file is a real persistent memory. If
'pmem=on', QEMU will set the flag RAM_PMEM in the RAM block of the
corresponding memory region. If 'pmem' is set while lack of libpmem
support, a error is generated.

Signed-off-by: Junyan He <junyan.he@intel.com>
Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-08-10 13:29:39 +03:00
Junyan He
cbfc017103 memory, exec: switch file ram allocation functions to 'flags' parameters
As more flag parameters besides the existing 'share' are going to be
added to following functions
memory_region_init_ram_from_file
qemu_ram_alloc_from_fd
qemu_ram_alloc_from_file
let's switch them to use the 'flags' parameters so as to ease future
flag additions.

The existing 'share' flag is converted to the RAM_SHARED bit in ram_flags,
and other flag bits are ignored by above functions right now.

Signed-off-by: Junyan He <junyan.he@intel.com>
Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2018-08-10 13:29:39 +03:00
Junyan He
b0e5de9381 memory, exec: Expose all memory block related flags.
We need to use these flags in other files rather than just in exec.c,
For example, RAM_SHARED should be used when create a ram block from file.
We expose them the exec/memory.h

Signed-off-by: Junyan He <junyan.he@intel.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-08-10 13:29:39 +03:00
Peter Maydell
e8c858944e * IEC units series (Philippe)
* Hyper-V PV TLB flush (Vitaly)
 * git archive detection (Daniel)
 * host serial passthrough fix (David)
 * NPT support for SVM emulation (Jan)
 * x86 "info mem" and "info tlb" fix (Doug)
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.22 (GNU/Linux)
 
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* IEC units series (Philippe)
* Hyper-V PV TLB flush (Vitaly)
* git archive detection (Daniel)
* host serial passthrough fix (David)
* NPT support for SVM emulation (Jan)
* x86 "info mem" and "info tlb" fix (Doug)

# gpg: Signature made Mon 02 Jul 2018 16:18:21 BST
# gpg:                using RSA key BFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream: (50 commits)
  tcg: simplify !CONFIG_TCG handling of tb_invalidate_*
  i386/monitor.c: make addresses canonical for "info mem" and "info tlb"
  target-i386: Add NPT support
  serial: Open non-block
  bsd-user: Use the IEC binary prefix definitions
  linux-user: Use the IEC binary prefix definitions
  tests/crypto: Use the IEC binary prefix definitions
  vl: Use the IEC binary prefix definitions
  monitor: Use the IEC binary prefix definitions
  cutils: Do not include "qemu/units.h" directly
  hw/rdma: Use the IEC binary prefix definitions
  hw/virtio: Use the IEC binary prefix definitions
  hw/vfio: Use the IEC binary prefix definitions
  hw/sd: Use the IEC binary prefix definitions
  hw/usb: Use the IEC binary prefix definitions
  hw/net: Use the IEC binary prefix definitions
  hw/i386: Use the IEC binary prefix definitions
  hw/ppc: Use the IEC binary prefix definitions
  hw/mips: Use the IEC binary prefix definitions
  hw/mips/r4k: Constify params_size
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-07-02 19:07:19 +01:00
Peter Maydell
334692bce7 tcg: Define and use new tlb_hit() and tlb_hit_page() functions
The condition to check whether an address has hit against a particular
TLB entry is not completely trivial. We do this in various places, and
in fact in one place (get_page_addr_code()) we have got the condition
wrong. Abstract it out into new tlb_hit() and tlb_hit_page() inline
functions (one for a known-page-aligned address and one for an
arbitrary address), and use them in all the places where we had the
condition correct.

This is a no-behaviour-change patch; we leave fixing the buggy
code in get_page_addr_code() to a subsequent patch.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180629162122.19376-2-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-07-02 08:02:20 -07:00
Paolo Bonzini
c40d479207 tcg: simplify !CONFIG_TCG handling of tb_invalidate_*
There is no need for a stub, since tb_invalidate_phys_addr can be excised
altogether when TCG is disabled.  This is a bit cleaner since it avoids
using code that is clearly specific to user-mode emulation (it calls
mmap_lock/unlock) for the !CONFIG_TCG case.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-07-02 15:41:18 +02:00
Philippe Mathieu-Daudé
646f34fa54 tcg: Fix --disable-tcg build breakage
Fix the --disable-tcg breakage introduced by 8bca9a03ec:

    $ configure --disable-tcg
    [...]
    $ make -C i386-softmmu exec.o
    make: Entering directory 'i386-softmmu'
      CC      exec.o
    In file included from source/qemu/exec.c:62:0:
    source/qemu/include/exec/ram_addr.h:96:6: error: conflicting types for ‘tb_invalidate_phys_range’
     void tb_invalidate_phys_range(ram_addr_t start, ram_addr_t end);
          ^~~~~~~~~~~~~~~~~~~~~~~~
    In file included from source/qemu/exec.c:24:0:
    source/qemu/include/exec/exec-all.h:309:6: note: previous declaration of ‘tb_invalidate_phys_range’ was here
     void tb_invalidate_phys_range(target_ulong start, target_ulong end);
          ^~~~~~~~~~~~~~~~~~~~~~~~
    source/qemu/exec.c:1043:6: error: conflicting types for ‘tb_invalidate_phys_addr’
     void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs)
          ^~~~~~~~~~~~~~~~~~~~~~~
    In file included from source/qemu/exec.c:24:0:
    source/qemu/include/exec/exec-all.h:308:6: note: previous declaration of ‘tb_invalidate_phys_addr’ was here
     void tb_invalidate_phys_addr(target_ulong addr);
          ^~~~~~~~~~~~~~~~~~~~~~~
    make: *** [source/qemu/rules.mak:69: exec.o] Error 1
    make: Leaving directory 'i386-softmmu'

Tested to build x86_64-softmmu and i386-softmmu targets.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180629200710.27626-1-f4bug@amsat.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-07-02 13:42:05 +01:00
Alexey Kardashevskiy
fc051ae6c4 memory/hmp: Print owners/parents in "info mtree"
This adds owners/parents (which are the same, just occasionally
owner==NULL) printing for memory regions; a new '-o' flag
enabled new output.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Message-Id: <20180604032511.6980-1-aik@ozlabs.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-28 19:05:36 +02:00
Paolo Bonzini
8bca9a03ec move public invalidate APIs out of translate-all.{c,h}, clean up
Place them in exec.c, exec-all.h and ram_addr.h.  This removes
knowledge of translate-all.h (which is an internal header) from
several files outside accel/tcg and removes knowledge of
AddressSpace from translate-all.c (as it only operates on ram_addr_t).

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-28 19:05:30 +02:00
Peter Maydell
4a83bf2f33 migration/next for 20180627
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Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20180627' into staging

migration/next for 20180627

# gpg: Signature made Wed 27 Jun 2018 13:53:53 BST
# gpg:                using RSA key F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>"
# gpg:                 aka "Juan Quintela <quintela@trasno.org>"
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* remotes/juanquintela/tags/migration/20180627:
  migration: fix crash in when incoming client channel setup fails
  postcopy: drop ram_pages parameter from postcopy_ram_incoming_init()
  migration: Stop sending whole pages through main channel
  migration: Remove not needed semaphore and quit
  migration: Wait for blocking IO
  migration: Start sending messages
  migration: Create ram_save_multifd_page
  migration: Create multifd_bytes ram_counter
  migration: Synchronize multifd threads with main thread
  migration: Add block where to send/receive packets
  migration: Multifd channels always wait on the sem
  migration: Add multifd traces for start/end thread
  migration: Abstract the number of bytes sent
  migration: Calculate mbps only during transfer time
  migration: Create multifd packet
  migration: Create multipage support

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-06-28 15:31:42 +01:00
David Hildenbrand
c136180c90 postcopy: drop ram_pages parameter from postcopy_ram_incoming_init()
Not needed. Don't expose last_ram_page().

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180620202736.21399-1-david@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
2018-06-27 13:28:31 +02:00