Commit graph

27 commits

Author SHA1 Message Date
Jan Kiszka b93c24ba31
memory: Add global-locking property to memory regions
This introduces the memory region property "global_locking". It is true
by default. By setting it to false, a device model can request BQL-free
dispatching of region accesses to its r/w handlers. The actual BQL
break-up will be provided in a separate patch.

Backports commit 196ea13104f802c508e57180b2a0d2b3418989a3 from qemu
2018-02-17 15:23:16 -05:00
Stefan Hajnoczi fc7b95d06a
memory: replace cpu_physical_memory_reset_dirty() with test-and-clear
The cpu_physical_memory_reset_dirty() function is sometimes used
together with cpu_physical_memory_get_dirty(). This is not atomic since
two separate accesses to the dirty memory bitmap are made.

Turn cpu_physical_memory_reset_dirty() and
cpu_physical_memory_clear_dirty_range_type() into the atomic
cpu_physical_memory_test_and_clear_dirty().

Backports commit 03eebc9e3246b9b3f5925aa41f7dfd7c1e467875 from qemu
2018-02-13 11:25:45 -05:00
Paolo Bonzini c82ea2b20b
memory: track DIRTY_MEMORY_CODE in mr->dirty_log_mask
DIRTY_MEMORY_CODE is only needed for TCG. By adding it directly to
mr->dirty_log_mask, we avoid testing for TCG everywhere a region is
checked for the enabled/disabled state of dirty logging.

Backports commit 677e7805cf95f3b2bca8baf0888d1ebed7f0c606 from qemu
2018-02-13 08:55:42 -05:00
Paolo Bonzini e3d1cef8fb
memory: prepare for multiple bits in the dirty log mask
When the dirty log mask will also cover other bits than DIRTY_MEMORY_VGA,
some listeners may be interested in the overall zero/non-zero value of
the dirty log mask; others may be interested in the value of single bits.

For this reason, always call log_start/log_stop if bits have respectively
appeared or disappeared, and pass the old and new values of the dirty log
mask so that listeners can distinguish the kinds of change.

For example, KVM checks if dirty logging used to be completely disabled
(in log_start) or is now completely disabled (in log_stop). On the
other hand, Xen has to check manually if DIRTY_MEMORY_VGA changed,
since that is the only bit it cares about.

Backports commit b2dfd71c4843a762f2befe702adb249cf55baf66 from qemu
2018-02-13 08:52:23 -05:00
Paolo Bonzini 1551573acc
memory: differentiate memory_region_is_logging and memory_region_get_dirty_log_mask
For now memory regions only track DIRTY_MEMORY_VGA individually, but
this will change soon. To support this, split memory_region_is_logging
in two functions: one that returns a given bit from dirty_log_mask,
and one that returns the entire mask. memory_region_is_logging gets an
extra parameter so that the compiler flags misuse.

While VGA-specific users (including the Xen listener!) will want to keep
checking that bit, KVM and vhost check for "any bit except migration"
(because migration is handled via the global start/stop listener
callbacks).

Backports commit 2d1a35bef0ed96b3f23535e459c552414ccdbafd from qemu
2018-02-13 08:41:44 -05:00
Peter Maydell df0fac6b6a
exec.c: Add new address_space_ld*/st* functions
Add new address_space_ld*/st* functions which allow transaction
attributes and error reporting for basic load and stores. These
are named to be in line with the address_space_read/write/rw
buffer operations.

The existing ld/st*_phys functions are now wrappers around
the new functions.

Backports commit 500131154d677930fce35ec3a6f0b5a26bcd2973 from qemu
2018-02-12 19:22:47 -05:00
Peter Maydell b94c89e559
exec.c: Make address_space_rw take transaction attributes
Make address_space_rw take transaction attributes, rather
than always using the 'unspecified' attributes.

Backports commit 5c9eb0286c819c1836220a32f2e1a7b5004ac79a from qemu
2018-02-12 19:04:09 -05:00
Peter Maydell 825e74410f
memory: Replace io_mem_read/write with memory_region_dispatch_read/write
Rather than retaining io_mem_read/write as simple wrappers around
the memory_region_dispatch_read/write functions, make the latter
public and change all the callers to use them, since we need to
touch all the callsites anyway to add MemTxAttrs and MemTxResult
support. Delete io_mem_read and io_mem_write entirely.

(All the callers currently pass MEMTXATTRS_UNSPECIFIED
and convert the return value back to bool or ignore it.)

Backports commit 3b6434953934e6d4a776ed426d8c6d6badee176f from qemu
2018-02-12 17:26:52 -05:00
Peter Maydell b2962f4613
memory: Define API for MemoryRegionOps to take attrs and return status
Define an API so that devices can register MemoryRegionOps whose read
and write callback functions are passed an arbitrary pointer to some
transaction attributes and can return a success-or-failure status code.
This will allow us to model devices which:
* behave differently for ARM Secure/NonSecure memory accesses
* behave differently for privileged/unprivileged accesses
* may return a transaction failure (causing a guest exception)
for erroneous accesses

This patch defines the new API and plumbs the attributes parameter through
to the memory.c public level functions io_mem_read() and io_mem_write(),
where it is currently dummied out.

The success/failure response indication is also propagated out to
io_mem_read() and io_mem_write(), which retain the old-style
boolean true-for-error return.

Backports commit cc05c43ad942165ecc6ffd39e41991bee43af044 from qemu
2018-02-12 17:17:27 -05:00
Nguyen Anh Quynh 6ea39f7d5a merge msvc with master 2017-02-24 10:39:36 +08:00
Nguyen Anh Quynh a95fdbc5aa cleanup qemu/include/exec/memory.h 2017-01-22 23:21:47 +08:00
Nguyen Anh Quynh 5de0785a1b cleanup qemu/memory.c 2017-01-22 23:07:17 +08:00
xorstream 770c5616e2 Automated leading tab to spaces conversion. 2017-01-21 12:28:22 +11:00
xorstream fac6a66860 platform.h move #3 2017-01-21 00:13:21 +11:00
xorstream b0ae2138fb Merge remote-tracking branch 'unicorn-engine/master' into msvc_native 2017-01-20 22:37:51 +11:00
Nguyen Anh Quynh ac68745a9c we dont need to handle VGA & Migration memories 2017-01-20 17:03:39 +08:00
Nguyen Anh Quynh a7fca49f7a delete qemu/include/qemu/notify.h 2017-01-20 14:47:41 +08:00
xorstream 1aeaf5c40d This code should now build the x86_x64-softmmu part 2. 2017-01-19 22:50:28 +11:00
Nguyen Anh Quynh 8b030ae51a fix for issue #523 2016-08-27 21:49:11 +08:00
Ryan Hileman 230cbd5330 add permissions to map_ptr api 2015-11-28 11:28:31 -08:00
Ryan Hileman 6d21ebabea implement host-controlled memory mapping for #261 2015-11-27 23:30:36 -08:00
Chris Eagle 6beb1b8a13 intermediate commit, working unmap of complete blocks, still need sub-blocks, and cross block 2015-08-29 21:17:30 -07:00
Nguyen Anh Quynh 3b5df362d7 chmod -x <some source code> 2015-08-28 18:12:56 +08:00
Chris Eagle 9530b2daff Remove MemoryBlock struct by consolidating in MemoryRegion. add new API uc_mem_protect. Add regress/mem_protect.c. Drop UC_PROT_EXEC for time being 2015-08-27 23:19:32 -07:00
Chris Eagle 686acb7e6e Detect all occurences of write to read only page. Add callback capability on write to read only. Add new error type UC_ERR_MEM_WRITE_RO and new access type UC_MEM_WRITE_RO for use in callback 2015-08-27 18:03:17 -07:00
Chris Eagle 00944b6cde Add ability to mark memory are read only. Add new API uc_mem_map_ex to allow permissions to be passed. Change MemoryBlock to track created MemoryRegions. Add regress/ro_mem_test.c 2015-08-26 13:29:54 -07:00
Nguyen Anh Quynh 344d016104 import 2015-08-21 15:04:50 +08:00