When storing large contiguous ranges in phys_map, all values tend to
be the same pointers to a single MemoryRegionSection. Collapse them
by marking nodes with level > 0 as leaves. This reduces tree memory
usage dramatically.
Signed-off-by: Avi Kivity <avi@redhat.com>
Instead of considering subpage on a per-page basis, split each section
into a subpage head, multipage body, and subpage tail, and register
each separately. This simplifies the registration functions.
Signed-off-by: Avi Kivity <avi@redhat.com>
We no longer describe memory in terms of individual pages; use sections
throughout instead.
PhysPageDesc no longer used - remove.
Signed-off-by: Avi Kivity <avi@redhat.com>
If the first subpage installed in a page is RAM, then we install it as
a full page, instead of a subpage. Fix by not special casing RAM.
The issue dates to commit db7b5426a4, which introduced subpages.
Signed-off-by: Avi Kivity <avi@redhat.com>
Use an expanding vector to store nodes. Allocation is baroque to g_renew()
potentially invalidating pointers; this will be addressed later.
Signed-off-by: Avi Kivity <avi@redhat.com>
Instead of storing PhysPageDesc, store pointers to MemoryRegionSections.
The various offsets (phys_offset & ~TARGET_PAGE_MASK,
PHYS_OFFSET & TARGET_PAGE_MASK, region_offset) can all be synthesized
from the information in a MemoryRegionSection. Adjust phys_page_find()
to synthesize a PhysPageDesc.
The upshot is that phys_map now contains uniform values, so it's easier
to generate and compress.
The end result is somewhat clumsy but this will be improved as we we
propagate MemoryRegionSections throughout the code instead of transforming
them to PhysPageDesc.
The MemoryRegionSection pointers are stored as uint16_t offsets in an
array. This saves space (when we also compress node pointers) and is
more cache friendly.
Signed-off-by: Avi Kivity <avi@redhat.com>
L1 and the lower levels in l1_phys_map are equivalent, except that L1 has
a different size, and is always allocated. Simplify the code by removing
L1. This leaves us with a tree composed solely of L2 tables, but that
problem can be renamed away later.
Signed-off-by: Avi Kivity <avi@redhat.com>
Instead of incrementally building the memory map, rebuild it every time.
This allows later simplification, since the code need not consider overlaying
a previous mapping. It is also RCU friendly.
With large memory guests this can get expensive, since the operation is
O(mem size), but this will be optimized later.
As a side effect subpage and L2 leaks are fixed here.
Signed-off-by: Avi Kivity <avi@redhat.com>
Current memory listeners are incremental; that is, they are expected to
maintain their own state, and receive callbacks for changes to that state.
This patch adds support for stateless listeners; these work by receiving
a ->begin() callback (which tells them that new state is coming), a
sequence of ->region_add() and ->region_nop() callbacks, and then a
->commit() callback which signifies the end of the new state. They should
ignore ->region_del() callbacks.
Signed-off-by: Avi Kivity <avi@redhat.com>
All functionality has been moved to various MemoryListeners.
Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This transforms memory.c into a library which can then be unit tested
easily, by feeding it inputs and listening to its outputs.
Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
It can be derived from the MemoryRegion itself (which is why it is not
used there).
Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
.readonly cannot be obtained from the MemoryRegion, since it is
inherited from aliases (so you can have a MemoryRegion mapped RW
at one address and RO at another). Record it in a MemoryRegionSection
for listeners.
Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This allows reverse iteration, which in turns allows consistent ordering
among multiple listeners:
l1->add
l2->add
l2->del
l1->del
Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
memory_region_set_offset() complicates the API, and has been deprecated
since its introduction. Now that it is no longer used, remove it.
Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
memory_region_set_offset() will be going away soon, so don't use it.
Use an alias instead.
Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Fix this error:
/src/qemu/target-ppc/helper.c: In function 'booke206_tlb_to_page_size':
/src/qemu/target-ppc/helper.c:1296:14: error: variable 'tlbncfg' set but not used [-Werror=unused-but-set-variable]
Tested-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The conversion to memory regions broke lazy ROMD switching by forgetting
to update the rom_mode state variable.
Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Helpful to understand guest configurations of things like the i440FX's
PAM or the state of ROM devices.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This fixes the regression introduced by cd7a45c95e: We lost the or'ing
with the full_update flag.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Makefile, Makefile.hw, Makefile.target and libcacard/Makefile
added GLIB_CFLAGS to QEMU_CFLAGS.
Makefile.objs does this, too, and is included by all other
Makefiles, so GLIB_CFLAGS were added twice (reported by malc).
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: malc <av1474@comtv.ru>
The ARM devboard models (vexpress-a9, realview, versatilepb, etc)
were accidentally trying to set one of the arm_sysctl properties
after device init. This has now become a fatal error; set the property
before device init where it should be done instead.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* aneesh/for-upstream:
hw/9pfs: Remove O_NOATIME flag from 9pfs open() calls in readonly mode
hw/9pfs: Update MAINTAINERS file
fsdev: Fix parameter parsing for proxy helper
hw/9pfs: Fix crash when mounting with synthfs
hw/9pfs: Preserve S_ISGID
hw/9pfs: Add new security model mapped-file.
This patch was contributed by Bogdan Harjoc. I added some assertions.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
System emulation executables with SDL are typically windows
executables. Sometimes console executables are more useful,
so create both variants if linker option -mwindows was detected.
v2:
This version uses QEMU_PROGW / QEMU_PROG instead of QEMU_PROG / QEMU_PROGC.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Similarly, use the object properties also to set the default
values of the qdev properties. This requires reordering
registration and initialization.
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
qdev_prop_set is not needed anymore except for hacks, simplify it and
inline it.
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Do not poke anymore in the struct when accessing qdev properties.
Instead, ask the object to set the right value.
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Drop the special free callback. Instead, register a "regular"
release method in the non-legacy property.
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Pointer properties (except for PROP_PTR of course) should not need a
legacy counterpart. In the future, relative paths will ensure that
QEMU will support the same syntax as now for drives etc..
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
