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Convert IO_MEM_{RAM,ROM,UNASSIGNED,NOTDIRTY} to MemoryRegions
Convert the fixed-address IO_MEM_RAM, IO_MEM_ROM, IO_MEM_UNASSIGNED,and IO_MEM_NOTDIRTY io handlers to MemoryRegions. These aren't realregions, since they are never added to the memory hierarchy, but they...
Convert IO_MEM_SUBPAGE_RAM to be a MemoryRegion
Signed-off-by: Avi Kivity <avi@redhat.com>Reviewed-by: Richard Henderson <rth@twiddle.net>
Remove IO_MEM_SUBPAGE
Replace with a MemoryRegion flag.
Drop IO_MEM_ROMD
Unlike ->readonly, ->readable is not inherited from aliase, so we can simplyquery the memory region.
Remove IO_MEM_SHIFT
We no longer use any of the lower bits of a ram_addr, so we might as welluse them for the io table index. This increases the number of potentialI/O handlers by a factor of 8.
vmstate, memory: decouple vmstate from memory API
Currently creating a memory region automatically registers it forlive migration. This differs from other state (which is enumeratedin a VMStateDescription structure) and ties the live migration codeinto the memory core....
Remove cpu_get_physical_page_desc()
No longer used.
Signed-off-by: Avi Kivity <avi@redhat.com>
memory: remove CPUPhysMemoryClient
memory: move obsolete exec.c functions to a private header
This will help avoid accidental usage.
memory, xen: pass MemoryRegion to xen_ram_alloc()
Currently xen_ram_alloc() relies on ram_addr, which is going away.Give it something else to use as a cookie.
exec.c: Fix subpage memory access to RAM MemoryRegion
Commit 95c318f5e1f88d7e5bcc6deac17330fd4806a2d3 (Fix segfault in mmiosubpage handling code.) prevented a segfault by making all subpageregistrations over an existing memory page perform an unassigned access....
fix spelling in main directory
Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Merge remote-tracking branch 'agraf/xen-next' into staging
move WORDS_ALIGNED to qemu-common.h
This is not a CPU interface, and a configure test would not be tooprecise. So just add it to qemu-common.h.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
cpu-common: Have a ram_addr_t of uint64 with Xen.
In Xen case, memory can be bigger than the host memory. that mean a32bits host (and QEMU) should be able to handle a RAM address of 64bits.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>Signed-off-by: Alexander Graf <agraf@suse.de>
Avoid CPU endian memory accesses in devices
Don't compile virtio.c in hwlib, it depends on memory accessesperformed in CPU endianness.
Make loads and stores in CPU endianness unavailable to devicesand poison them to avoid further bugs.
Acked-by: Alexander Graf <agraf@suse.de>...
qemu_ram_ptr_length: take ram_addr_t as arguments
qemu_ram_ptr_length should take ram_addr_t as argument rather thantarget_phys_addr_t because is doing comparisons with RAMBlock addresses.
cpu_physical_memory_map should create a ram_addr_t address to pass to...
exec: add endian specific phys ld/st functions
Device code some times needs to access physical memory and does thatthrough the ld./st._phys functions. However, these are the exact samefunctions that the CPU uses to access memory, which means they willbe endianness swapped depending on the target CPU....
exec.c: refactor cpu_physical_memory_map
Introduce qemu_ram_ptr_length that takes an address and a size asparameters rather than just an address.
Refactor cpu_physical_memory_map so that we call qemu_ram_ptr_length onlyonce rather than calling qemu_get_ram_ptr one time per page....
exec: Implement qemu_ram_free_from_ptr()
Required for regions mapped via qemu_ram_alloc_from_ptr(). VFIOand ivshmem will make use of this to remove mappings when devicesare hot unplugged.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Introduce qemu_put_ram_ptr
This function allows to unlock a ram_ptr give by qemu_get_ram_ptr. Aftera call to qemu_put_ram_ptr, the pointer may be unmap from QEMU whenused with Xen.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>Acked-by: Alexander Graf <agraf@suse.de>...
Merge remote branch 'origin/master' into pci
Conflicts: exec.c
cpu-common: Modify cpu_physical_memory_read and cpu_physical_memory_write
A lot of calls don't operate on bytes but on words or on structured data.So instead of a pointer to uint8_t, a void pointer is the better choice.
This allows removing many type casts....
cpu: add set_memory flag to request dirty logging
Pass the flag to all cpu notifiers, doingnothing at this point. Will be used byfollow-up patches.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Add qemu_ram_remap
qemu_ram_remap() unmaps the specified RAM pages, then re-maps thesepages again. This is used by KVM HWPoison support to clear HWPoisonedpage tables across guest rebooting, so that a new page may beallocated later to recover the memory error....
Introduce log_start/log_stop in CPUPhysMemoryClient
In order to use log_start/log_stop with Xen as well in the vga code,this two operations have been put in CPUPhysMemoryClient.
The two new functions cpu_physical_log_start,cpu_physical_log_stop areused in hw/vga.c and replace the kvm_log_start/stop. With this, vga does...
exec: introduce endianness swapped mmio
The way we're currently modeling mmio is too simplified. We assume thatevery device has the same endianness as the target CPU. In reality,most devices are little endian (all PCI and ISA ones I'm aware of). Someare big endian (special system devices) and a very little fraction is...
migration: stable ram block ordering
This makes ram block ordering under migration stable, ordered by offset.This is especially useful for migration to exec, for debugging.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>Tested-by: Jason Wang <jasowang@redhat.com>
Export qemu_ram_addr_from_host
To be used by next patches.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>Signed-off-by: Avi Kivity <avi@redhat.com>
Add qemu_ram_alloc_from_ptr function
Provide a function to add an allocated region of memory to the qemu RAM.
This patch is copied from Marcelo's qemu_ram_map() in qemu-kvm and given theclearer name qemu_ram_alloc_from_ptr().
Signed-off-by: Cam Macdonell <cam@cs.ualberta.ca>...
qemu_ram_alloc: Add DeviceState and name parameters
These will be used to generate unique id strings for ramblocks. The namefield is required, the device pointer is optional as most callers don'thave a device. When there's no device or the device isn't a child of...
Remove IO_MEM_SUBWIDTH.
Greatly simplify the subpage implementation by not supportingmultiple devices at the same address at different widths. Wedon't need full copies of mem_read/mem_write/opaque for eachaddress, only a single index back into the main io_mem_* arrays....
move targphys.h and hw/poison.h inclusion to cpu-common.h
With more files from outside the hw/ directory being placed intolibhw, avoid the need to include hw/hw.h for the sake of targ_phys_addr_t.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
tcg: initial ia64 support
Compile pci only once
Move coalesced_mmio declarations to a more accessible location.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Disable phsyical memory handling in userspace emulation.
Code to handle physical memory access is not meaningful in usrmode emulation,so disable it.
Signed-off-by: Paul Brook <paul@codesourcery.com>
qemu: memory notifiers
This adds notifiers for phys memory changes: a set of callbacks thatvhost can register and update kernel accordingly. Down the road, kvmcode can be switched to use these as well, instead of calling kvm codedirectly from exec.c as is done now....
Revert "Get rid of _t suffix"
In the very least, a change like this requires discussion on the list.
The naming convention is goofy and it causes a massive merge problem. Somethinglike this must be presented on the list first so people can provide input...
Get rid of _t suffix
Some not so obvious bits, slirp and Xen were left alone for the timebeing.
Signed-off-by: malc <av1474@comtv.ru>
Make CPURead/WriteFunc structure 'const'
Unbreak large mem support by removing kqemu
kqemu introduces a number of restrictions on the i386 target. The worst is thatit prevents large memory from working in the default build.
Furthermore, kqemu is fundamentally flawed in a number of ways. It relies on...
Remove io_index argument from cpu_register_io_memory()
The parameter is always zero except when registering the three internalio regions (ROM, unassigned, notdirty). Remove the parameter to reducethe API's power, thus facilitating future change.
Signed-off-by: Avi Kivity <avi@redhat.com>...
Hardware convenience library
The only target dependency for most hardware is sizeof(target_phys_addr_t).Build these files into a convenience library, and use that instead ofbuilding for every target.
Remove and poison various target specific macros to avoid bogus target...