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2020-03-16memory: Fix start offset for bitmap log_clear hookMatt Borgerson1-4/+5
Currently only the final page offset is being passed to the `log_clear` hook via `memory_region_clear_dirty_bitmap` after it is used as an iterator in `cpu_physical_memory_test_and_clear_dirty`. This patch corrects the start address and size of the region. Signed-off-by: Matt Borgerson <contact@mborgerson.com> Reviewed-by: Peter Xu <peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-27Memory: Only call ramblock_ptr when needed in qemu_ram_writebackAnthony PERARD1-2/+2
It is possible that a ramblock doesn't have memory that QEMU can access, this is the case with the Xen hypervisor. In order to avoid to trigger an assert, only call ramblock_ptr() when needed in qemu_ram_writeback(). This should fix migration of Xen guests that was broken with bd108a44bc29 ("migration: ram: Switch to ram block writeback"). Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20191219154323.325255-1-anthony.perard@citrix.com>
2020-02-25Merge branch 'exec_rw_const_v4' of https://github.com/philmd/qemu into HEADPaolo Bonzini1-31/+36
2020-02-25Merge tag 'patchew/20200219160953.13771-1-imammedo@redhat.com' of ↵Paolo Bonzini1-58/+6
https://github.com/patchew-project/qemu into HEAD This series removes ad hoc RAM allocation API (memory_region_allocate_system_memory) and consolidates it around hostmem backend. It allows to * resolve conflicts between global -mem-prealloc and hostmem's "policy" option, fixing premature allocation before binding policy is applied * simplify complicated memory allocation routines which had to deal with 2 ways to allocate RAM. * reuse hostmem backends of a choice for main RAM without adding extra CLI options to duplicate hostmem features. A recent case was -mem-shared, to enable vhost-user on targets that don't support hostmem backends [1] (ex: s390) * move RAM allocation from individual boards into generic machine code and provide them with prepared MemoryRegion. * clean up deprecated NUMA features which were tied to the old API (see patches) - "numa: remove deprecated -mem-path fallback to anonymous RAM" - (POSTPONED, waiting on libvirt side) "forbid '-numa node,mem' for 5.0 and newer machine types" - (POSTPONED) "numa: remove deprecated implicit RAM distribution between nodes" Introduce a new machine.memory-backend property and wrapper code that aliases global -mem-path and -mem-alloc into automatically created hostmem backend properties (provided memory-backend was not set explicitly given by user). A bulk of trivial patches then follow to incrementally convert individual boards to using machine.memory-backend provided MemoryRegion. Board conversion typically involves: * providing MachineClass::default_ram_size and MachineClass::default_ram_id so generic code could create default backend if user didn't explicitly provide memory-backend or -m options * dropping memory_region_allocate_system_memory() call * using convenience MachineState::ram MemoryRegion, which points to MemoryRegion allocated by ram-memdev On top of that for some boards: * missing ram_size checks are added (typically it were boards with fixed ram size) * ram_size fixups are replaced by checks and hard errors, forcing user to provide correct "-m" values instead of ignoring it and continuing running. After all boards are converted, the old API is removed and memory allocation routines are cleaned up.
2020-02-22exec: keep ram block across fork when using qtestAlexander Bulekov1-2/+10
Ram blocks were marked MADV_DONTFORK breaking fuzzing-tests which execute each test-input in a forked process. Signed-off-by: Alexander Bulekov <alxndr@bu.edu> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Darren Kenny <darren.kenny@oracle.com> Message-id: 20200220041118.23264-14-alxndr@bu.edu Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2020-02-20exec: Let cpu_[physical]_memory API use a boolean 'is_write' argumentPhilippe Mathieu-Daudé1-5/+5
The 'is_write' argument is either 0 or 1. Convert it to a boolean type. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-20Avoid address_space_rw() with a constant is_write argumentPeter Maydell1-2/+2
The address_space_rw() function allows either reads or writes depending on the is_write argument passed to it; this is useful when the direction of the access is determined programmatically (as for instance when handling the KVM_EXIT_MMIO exit reason). Under the hood it just calls either address_space_write() or address_space_read_full(). We also use it a lot with a constant is_write argument, though, which has two issues: * when reading "address_space_rw(..., 1)" this is less immediately clear to the reader as being a write than "address_space_write(...)" * calling address_space_rw() bypasses the optimization in address_space_read() that fast-paths reads of a fixed length This commit was produced with the included Coccinelle script scripts/coccinelle/exec_rw_const.cocci. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Laurent Vivier <lvivier@redhat.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Message-Id: <20200218112457.22712-1-peter.maydell@linaro.org> [PMD: Update macvm_set_cr0() reported by Laurent Vivier] Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-20Let address_space_rw() calls pass a boolean 'is_write' argumentPhilippe Mathieu-Daudé1-2/+2
Since its introduction in commit ac1970fbe8, address_space_rw() takes a boolean 'is_write' argument. Fix the codebase by using an explicit boolean type. This commit was produced with the included Coccinelle script scripts/coccinelle/exec_rw_const. Inspired-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-20exec: Let address_space_unmap() use a boolean 'is_write' argumentPhilippe Mathieu-Daudé1-2/+2
The 'is_write' argument is either 0 or 1. Convert it to a boolean type. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-20exec: Let the cpu_[physical]_memory API use void pointer argumentsPhilippe Mathieu-Daudé1-3/+5
As we are only dealing with a blob buffer, use a void pointer argument. This will let us simplify other APIs. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-20exec: Let the address_space API use void pointer argumentsPhilippe Mathieu-Daudé1-5/+6
As we are only dealing with a blob buffer, use a void pointer argument. This will let us simplify other APIs. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-20exec: Let flatview API take void pointer argumentsPhilippe Mathieu-Daudé1-6/+8
Only flatview_[read/write]_continue use a byte pointer to increment an offset. For the users, we are only dealing with a blob buffer. Use a void pointer argument. This will let us simplify the address_space API in the next commit. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-20exec: Rename ram_ptr variablePhilippe Mathieu-Daudé1-10/+10
As we are going to use a different 'ptr' variable, rename the 'ram pointer' variable. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-19hostmem: fix strict bind policyIgor Mammedov1-11/+0
When option -mem-prealloc is used with one or more memory-backend objects, created backends may not obey configured bind policy or creation may fail after kernel attempts to move pages according to bind policy. Reason is in file_ram_alloc(), which will pre-allocate any descriptor based RAM if global mem_prealloc != 0 and that happens way before bind policy is applied to memory range. One way to fix it would be to extend memory_region_foo() API and add more invariants that could broken later due implicit dependencies that's hard to track. Another approach is to drop adhoc main RAM allocation and consolidate it around memory-backend. That allows to have single place that allocates guest RAM (main and memdev) in the same way and then global mem_prealloc could be replaced by backend's property[s] that will affect created memory-backend objects but only in correct order this time. With main RAM now converted to hostmem backends, there is no point in keeping global mem_prealloc around, so alias -mem-prealloc to "memory-backend.prealloc=on" machine compat[*] property and make mem_prealloc a local variable to only stir registration of compat property. *) currently user accessible -global works only with DEVICE based objects and extra work is needed to make it work with hostmem backends. But that is convenience option and out of scope of this already huge refactoring. Hence machine compat properties were used. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Message-Id: <20200219160953.13771-78-imammedo@redhat.com>
2020-02-19exec: drop bogus mem_path from qemu_ram_alloc_from_fd()Igor Mammedov1-2/+2
Function will report error that will mention global mem_path, which was valid the only if legacy -mem-path was used and only in case of main RAM. However it doesn't work with hostmem backends (for example: " qemu: -object memory-backend-file,id=ram0,size=128M,mem-path=foo: backing store (null) size 0x200000 does not match 'size' option 0x8000000 ") and couldn't possibly work in general FD case the function is supposed to handle. Taking in account that main RAM was converted into memory-backend-foo object, there is no point in printing file name (from inappropriate place) as failing path is a part of backend's error message. Hence drop bogus mem_path usage from qemu_ram_alloc_from_fd(), it's a job of its user to add file name to error message if applicable. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20200219160953.13771-75-imammedo@redhat.com>
2020-02-19exec: cleanup qemu_minrampagesize()/qemu_maxrampagesize()Igor Mammedov1-45/+4
Since all RAM is backed by hostmem backends, drop global -mem-path invariant and simplify code. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20200219160953.13771-74-imammedo@redhat.com>
2020-02-13Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20200212' into stagingPeter Maydell1-8/+7
Fix breakpoint invalidation. Add support for tcg helpers with 7 arguments. Add support for gvec helpers with 5 arguments. # gpg: Signature made Thu 13 Feb 2020 00:21:34 GMT # gpg: using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F # gpg: issuer "richard.henderson@linaro.org" # gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full] # Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A 05C0 64DF 38E8 AF7E 215F * remotes/rth/tags/pull-tcg-20200212: tcg: Add tcg_gen_gvec_5_ptr tcg: Add support for a helper with 7 arguments exec: flush CPU TB cache in breakpoint_invalidate Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-02-12exec: do not define use_icount for user-mode emulationPaolo Bonzini1-4/+4
use_icount is also defined by stubs/cpu-get-icount.c, we do not need to have a useless definition in exec.c. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: <20200204161036.20889-1-pbonzini@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2020-02-11exec: flush CPU TB cache in breakpoint_invalidateMax Filippov1-8/+7
When a breakpoint is inserted at location for which there's currently no virtual to physical translation no action is taken on CPU TB cache. If a TB for that virtual address already exists but is not visible ATM the breakpoint won't be hit next time an instruction at that address will be executed. Flush entire CPU TB cache in breakpoint_invalidate to force re-translation of all TBs for the breakpoint address. This change fixes the following scenario: - linux user application is running - a breakpoint is inserted from QEMU gdbstub for a user address that is not currently present in the target CPU TLB - an instruction at that address is executed, but the external debugger doesn't get control. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Message-Id: <20191127220602.10827-2-jcmvbkbc@gmail.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-01-20misc: use QEMU_IS_ALIGNEDMarc-André Lureau1-2/+2
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Stefan Berger <stefanb@linux.ibm.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2020-01-15tcg: Search includes from the project root source directoryPhilippe Mathieu-Daudé1-1/+1
We currently search both the root and the tcg/ directories for tcg files: $ git grep '#include "tcg/' | wc -l 28 $ git grep '#include "tcg[^/]' | wc -l 94 To simplify the preprocessor search path, unify by expliciting the tcg/ directory. Patch created mechanically by running: $ for x in \ tcg.h tcg-mo.h tcg-op.h tcg-opc.h \ tcg-op-gvec.h tcg-gvec-desc.h; do \ sed -i "s,#include \"$x\",#include \"tcg/$x\"," \ $(git grep -l "#include \"$x\""); \ done Acked-by: David Gibson <david@gibson.dropbear.id.au> (ppc parts) Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200101112303.20724-2-philmd@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-12-20Merge remote-tracking branch ↵Peter Maydell1-2/+2
'remotes/stsquad/tags/pull-tesing-and-misc-191219-1' into staging Various testing and logging updates - test tci with Travis - enable multiarch testing in Travis - default to out-of-tree builds - make changing logfile safe via RCU - remove redundant tests - remove gtester test from docker - convert DEBUG_MMAP to tracepoints - remove hand rolled glob function - trigger tcg re-configure when needed # gpg: Signature made Thu 19 Dec 2019 08:24:08 GMT # gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44 # gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full] # Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44 * remotes/stsquad/tags/pull-tesing-and-misc-191219-1: (25 commits) tests/tcg: ensure we re-configure if configure.sh is updated trace: replace hand-crafted pattern_glob with g_pattern_match_simple linux-user: convert target_munmap debug to a tracepoint linux-user: log page table changes under -d page linux-user: add target_mmap_complete tracepoint linux-user: convert target_mmap debug to tracepoint linux-user: convert target_mprotect debug to tracepoint travis.yml: Remove the redundant clang-with-MAIN_SOFTMMU_TARGETS entry docker: gtester is no longer used Added tests for close and change of logfile. Add use of RCU for qemu_logfile. qemu_log_lock/unlock now preserves the qemu_logfile handle. Add a mutex to guarantee single writer to qemu_logfile handle. Cleaned up flow of code in qemu_set_log(), to simplify and clarify. Fix double free issue in qemu_set_log_filename(). ci: build out-of-tree travis.yml: Enable builds on arm64, ppc64le and s390x tests/test-util-filemonitor: Skip test on non-x86 Travis containers tests/hd-geo-test: Skip test when images can not be created iotests: Skip test 079 if it is not possible to create large files ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-12-20Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell1-4/+3
* More uses of RCU_READ_LOCK_GUARD (Dave, myself) * QOM doc improvments (Greg) * Cleanups from the Meson conversion (Marc-André) * Support for multiple -accel options (myself) * Many x86 machine cleanup (Philippe, myself) * tests/migration-test cleanup (Juan) * PC machine removal and next round of deprecation (Thomas) * kernel-doc integration (Peter, myself) # gpg: Signature made Wed 18 Dec 2019 01:35:02 GMT # gpg: using RSA key BFFBD25F78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full] # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [full] # 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: (87 commits) vga: cleanup mapping of VRAM for non-PCI VGA hw/display: Remove "rombar" hack from vga-pci and vmware_vga hw/pci: Remove the "command_serr_enable" property hw/audio: Remove the "use_broken_id" hack from the AC97 device hw/i386: Remove the deprecated machines 0.12 up to 0.15 hw/pci-host: Add Kconfig entry to select the IGD Passthrough Host Bridge hw/pci-host/i440fx: Extract the IGD passthrough host bridge device hw/pci-host/i440fx: Use definitions instead of magic values hw/pci-host/i440fx: Use size_t to iterate over ARRAY_SIZE() hw/pci-host/i440fx: Extract PCII440FXState to "hw/pci-host/i440fx.h" hw/pci-host/i440fx: Correct the header description Fix some comment spelling errors. target/i386: remove unused pci-assign codes WHPX: refactor load library migration: check length directly to make sure the range is aligned memory: include MemoryListener documentation and some missing function parameters docs: add memory API reference memory.h: Silence kernel-doc complaints docs: Create bitops.rst as example of kernel-docs bitops.h: Silence kernel-doc complaints ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-12-18qemu_log_lock/unlock now preserves the qemu_logfile handle.Robert Foley1-2/+2
qemu_log_lock() now returns a handle and qemu_log_unlock() receives a handle to unlock. This allows for changing the handle during logging and ensures the lock() and unlock() are for the same file. Also in target/tilegx/translate.c removed the qemu_log_lock()/unlock() calls (and the log("\n")), since the translator can longjmp out of the loop if it attempts to translate an instruction in an inaccessible page. Signed-off-by: Robert Foley <robert.foley@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20191118211528.3221-5-robert.foley@linaro.org>
2019-12-18exec: Fix file_ram_alloc() error API violationsMarkus Armbruster1-2/+4
When os_mem_prealloc() fails, file_ram_alloc() calls qemu_ram_munmap() and returns null. Except it doesn't when its @errp argument is null, because it checks for failure with (errp && *errp). Introduced in commit 056b68af77 "fix qemu exit on memory hotplug when allocation fails at prealloc time". No caller actually passes null. Fix anyway: splice in a local Error *err, and error_propagate(). Cc: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Message-Id: <20191204093625.14836-6-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2019-12-18migration: check length directly to make sure the range is alignedWei Yang1-4/+3
Since the start addr is already checked, to make sure the range is aligned, checking the length is enough. Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20190712032704.7826-1-richardw.yang@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-12-16Memory: Enable writeback for given memory regionBeata Michalska1-0/+36
Add an option to trigger memory writeback to sync given memory region with the corresponding backing store, case one is available. This extends the support for persistent memory, allowing syncing on-demand. Signed-off-by: Beata Michalska <beata.michalska@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20191121000843.24844-3-beata.michalska@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-10-30Merge remote-tracking branch ↵Peter Maydell1-0/+2
'remotes/stsquad/tags/pull-tcg-plugins-281019-4' into staging TCG Plugins initial implementation - use --enable-plugins @ configure - low impact introspection (-plugin empty.so to measure overhead) - plugins cannot alter guest state - example plugins included in source tree (tests/plugins) - -d plugin to enable plugin output in logs - check-tcg runs extra tests when plugins enabled - documentation in docs/devel/plugins.rst # gpg: Signature made Mon 28 Oct 2019 15:13:23 GMT # gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44 # gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full] # Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44 * remotes/stsquad/tags/pull-tcg-plugins-281019-4: (57 commits) travis.yml: enable linux-gcc-debug-tcg cache MAINTAINERS: add me for the TCG plugins code scripts/checkpatch.pl: don't complain about (foo, /* empty */) .travis.yml: add --enable-plugins tests include/exec: wrap cpu_ldst.h in CONFIG_TCG accel/stubs: reduce headers from tcg-stub tests/plugin: add hotpages to analyse memory access patterns tests/plugin: add instruction execution breakdown tests/plugin: add a hotblocks plugin tests/tcg: enable plugin testing tests/tcg: drop test-i386-fprem from TESTS when not SLOW tests/tcg: move "virtual" tests to EXTRA_TESTS tests/tcg: set QEMU_OPTS for all cris runs tests/tcg/Makefile.target: fix path to config-host.mak tests/plugin: add sample plugins linux-user: support -plugin option vl: support -plugin option plugin: add qemu_plugin_outs helper plugin: add qemu_plugin_insn_disas helper plugin: expand the plugin_init function to include an info block ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-10-29Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20191028' into stagingPeter Maydell1-34/+0
Improvements for TARGET_PAGE_BITS_VARY Fix for TCI ld16u_i64. Fix for segv on icount execute from i/o memory. Two misc cleanups. # gpg: Signature made Mon 28 Oct 2019 14:55:08 GMT # gpg: using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F # gpg: issuer "richard.henderson@linaro.org" # gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full] # Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A 05C0 64DF 38E8 AF7E 215F * remotes/rth/tags/pull-tcg-20191028: translate-all: Remove tb_alloc translate-all: fix uninitialized tb->orig_tb cputlb: Fix tlb_vaddr_to_host exec: Cache TARGET_PAGE_MASK for TARGET_PAGE_BITS_VARY exec: Promote TARGET_PAGE_MASK to target_long exec: Restrict TARGET_PAGE_BITS_VARY assert to CONFIG_DEBUG_TCG exec: Use const alias for TARGET_PAGE_BITS_VARY configure: Detect compiler support for __attribute__((alias)) exec: Split out variable page size support to exec-vary.c cpu: use ROUND_UP() to define xxx_PAGE_ALIGN cputlb: ensure _cmmu helper functions follow the naming standard tci: Add implementation for INDEX_op_ld16u_i64 Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-10-28cpu: hook plugin vcpu eventsEmilio G. Cota1-0/+2
Signed-off-by: Emilio G. Cota <cota@braap.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
2019-10-28exec: Split out variable page size support to exec-vary.cRichard Henderson1-34/+0
The next patch will play a trick with "const" that will confuse the compiler about the uses of target_page_bits within exec.c. Moving everything to a new file prevents this confusion. No functional change so far. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-10-26core: replace getpagesize() with qemu_real_host_page_sizeWei Yang1-3/+3
There are three page size in qemu: real host page size host page size target page size All of them have dedicate variable to represent. For the last two, we use the same form in the whole qemu project, while for the first one we use two forms: qemu_real_host_page_size and getpagesize(). qemu_real_host_page_size is defined to be a replacement of getpagesize(), so let it serve the role. [Note] Not fully tested for some arch or device. Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Message-Id: <20191013021145.16011-3-richardw.yang@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-10-11rcu: Use automatic rc_read unlock in core memory/exec codeDr. David Alan Gilbert1-68/+48
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20191007143642.301445-6-dgilbert@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2019-10-04memory: allow memory_region_register_iommu_notifier() to failEric Auger1-2/+8
Currently, when a notifier is attempted to be registered and its flags are not supported (especially the MAP one) by the IOMMU MR, we generally abruptly exit in the IOMMU code. The failure could be handled more nicely in the caller and especially in the VFIO code. So let's allow memory_region_register_iommu_notifier() to fail as well as notify_flag_changed() callback. All sites implementing the callback are updated. This patch does not yet remove the exit(1) in the amd_iommu code. in SMMUv3 we turn the warning message into an error message saying that the assigned device would not work properly. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-10-03replay: don't synchronize memory operations in replay modePavel Dovgalyuk1-2/+11
Commit 9458a9a1df1a4c719e24512394d548c1fc7abd22 added synchronization of vCPU and migration operations through calling run_on_cpu operation. However, in replay mode this synchronization is unneeded, because I/O and vCPU threads are already synchronized. This patch disables such synchronization for record/replay mode. Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@gmail.com>
2019-09-25cputlb: Pass retaddr to tb_check_watchpointRichard Henderson1-1/+1
Fixes the previous TLB_WATCHPOINT patches because we are currently failing to set cpu->mem_io_pc with the call to cpu_check_watchpoint. Pass down the retaddr directly because it's readily available. Fixes: 50b107c5d61 Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-09-25cputlb: Remove tb_invalidate_phys_page_range is_cpu_write_accessRichard Henderson1-2/+2
All callers pass false to this argument. Remove it and pass the constant on to tb_invalidate_phys_page_range__locked. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-09-25cputlb: Merge and move memory_notdirty_write_{prepare,complete}Richard Henderson1-44/+0
Since 9458a9a1df1a, all readers of the dirty bitmaps wait for the rcu lock, which means that they wait until the end of any executing TranslationBlock. As a consequence, there is no need for the actual access to happen in between the _prepare and _complete. Therefore, we can improve things by merging the two functions into notdirty_write and dropping the NotDirtyInfo structure. In addition, the only users of notdirty_write are in cputlb.c, so move the merged function there. Pass in the CPUIOTLBEntry from which the ram_addr_t may be computed. Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-09-25cputlb: Partially inline memory_region_section_get_iotlbRichard Henderson1-19/+3
There is only one caller, tlb_set_page_with_attrs. We cannot inline the entire function because the AddressSpaceDispatch structure is private to exec.c, and cannot easily be moved to include/exec/memory-internal.h. Compute is_ram and is_romd once within tlb_set_page_with_attrs. Fold the number of tests against these predicates. Compute cpu_physical_memory_is_clean outside of the tlb lock region. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-09-25cputlb: Move NOTDIRTY handling from I/O path to TLB pathRichard Henderson1-50/+0
Pages that we want to track for NOTDIRTY are RAM. We do not really need to go through the I/O path to handle them. Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-09-25cputlb: Move ROM handling from I/O path to TLB pathRichard Henderson1-40/+1
It does not require going through the whole I/O path in order to discard a write. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-09-25exec: Adjust notdirty tracingRichard Henderson1-0/+3
The memory_region_tb_read tracepoint is unreachable, since notdirty is supposed to apply only to writes. The memory_region_tb_write tracepoint is mis-named, because notdirty is not only used for TB invalidation. It is also used for e.g. VGA RAM updates and migration. Replace memory_region_tb_write with memory_notdirty_write_access, and place it in memory_notdirty_write_prepare where it can catch all of the instances. Add memory_notdirty_set_dirty to log when we no longer intercept writes to a page. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-09-16memory: fetch pmem size in get_file_size()Stefan Hajnoczi1-1/+33
Neither stat(2) nor lseek(2) report the size of Linux devdax pmem character device nodes. Commit 314aec4a6e06844937f1677f6cba21981005f389 ("hostmem-file: reject invalid pmem file sizes") added code to hostmem-file.c to fetch the size from sysfs and compare against the user-provided size=NUM parameter: if (backend->size > size) { error_setg(errp, "size property %" PRIu64 " is larger than " "pmem file \"%s\" size %" PRIu64, backend->size, fb->mem_path, size); return; } It turns out that exec.c:qemu_ram_alloc_from_fd() already has an equivalent size check but it skips devdax pmem character devices because lseek(2) returns 0: if (file_size > 0 && file_size < size) { error_setg(errp, "backing store %s size 0x%" PRIx64 " does not match 'size' option 0x" RAM_ADDR_FMT, mem_path, file_size, size); return NULL; } This patch moves the devdax pmem file size code into get_file_size() so that we check the memory size in a single place: qemu_ram_alloc_from_fd(). This simplifies the code and makes it more general. This also fixes the problem that hostmem-file only checks the devdax pmem file size when the pmem=on parameter is given. An unchecked size=NUM parameter can lead to SIGBUS in QEMU so we must always fetch the file size for Linux devdax pmem character device nodes. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20190830093056.12572-1-stefanha@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-09-16exec.c: add a check between constants to see whether we could skipWei Yang1-1/+2
The maximum level is defined as P_L2_LEVELS and skip is defined with 6 bits, which means if P_L2_LEVELS < (1 << 6), skip never exceeds the boundary. Since this check is between two constants, which leverages compiler to optimize the code based on different configuration. Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Message-Id: <20190321082555.21118-7-richardw.yang@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-09-16exec.c: correct the maximum skip value during compactWei Yang1-1/+1
skip is defined with 6 bits. So the maximum value should be (1 << 6). Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Message-Id: <20190321082555.21118-6-richardw.yang@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-09-16exec.c: subpage->sub_section is already initialized to 0Wei Yang1-5/+5
In subpage_init(), we will set subpage->sub_section to PHYS_SECTION_UNASSIGNED by subpage_register. Since PHYS_SECTION_UNASSIGNED is defined to be 0, and we allocate subpage with g_malloc0, this means subpage->sub_section is already initialized to 0. This patch removes the redundant setup for a new subpage and also fix the code style. Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Message-Id: <20190321082555.21118-5-richardw.yang@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-09-16exec.c: get nodes_nb_alloc with one MAX calculationWei Yang1-2/+1
The purpose of these two MAX here is to get the maximum of these three variables: A: map->nodes_nb + nodes B: map->nodes_nb_alloc C: alloc_hint We can write it like MAX(A, B, C). Since the if condition says A > B, this means MAX(A, B, C) = MAX(A, C). This patch just simplify the calculation a bit. Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Message-Id: <20190321082555.21118-4-richardw.yang@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-09-16exec.c: replace hwaddr with uint64_t for better understandingWei Yang1-2/+2
Function phys_page_set() and phys_page_set_level() 's argument *nb* stands for number of pages to set instead of hardware address. This would be more proper to use uint64_t instead of hwaddr for its type. Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Message-Id: <20190321082555.21118-2-richardw.yang@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-09-04Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20190903' into stagingPeter Maydell1-137/+40
Allow page table bit to swap endianness. Reorganize watchpoints out of i/o path. Return host address from probe_write / probe_access. # gpg: Signature made Tue 03 Sep 2019 16:47:50 BST # gpg: using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F # gpg: issuer "richard.henderson@linaro.org" # gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full] # Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A 05C0 64DF 38E8 AF7E 215F * remotes/rth/tags/pull-tcg-20190903: (36 commits) tcg: Factor out probe_write() logic into probe_access() tcg: Make probe_write() return a pointer to the host page s390x/tcg: Pass a size to probe_write() in do_csst() hppa/tcg: Call probe_write() also for CONFIG_USER_ONLY mips/tcg: Call probe_write() for CONFIG_USER_ONLY as well tcg: Enforce single page access in probe_write() tcg: Factor out CONFIG_USER_ONLY probe_write() from s390x code s390x/tcg: Fix length calculation in probe_write_access() s390x/tcg: Use guest_addr_valid() instead of h2g_valid() in probe_write_access() tcg: Check for watchpoints in probe_write() cputlb: Handle watchpoints via TLB_WATCHPOINT cputlb: Remove double-alignment in store_helper cputlb: Fix size operand for tlb_fill on unaligned store exec: Factor out cpu_watchpoint_address_matches cputlb: Fold TLB_RECHECK into TLB_INVALID_MASK exec: Factor out core logic of check_watchpoint() exec: Move user-only watchpoint stubs inline target/sparc: sun4u Invert Endian TTE bit target/sparc: Add TLB entry with attributes cputlb: Byte swap memory transaction attribute ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-09-03cputlb: Handle watchpoints via TLB_WATCHPOINTRichard Henderson1-107/+7
The raising of exceptions from check_watchpoint, buried inside of the I/O subsystem, is fundamentally broken. We do not have the helper return address with which we can unwind guest state. Replace PHYS_SECTION_WATCH and io_mem_watch with TLB_WATCHPOINT. Move the call to cpu_check_watchpoint into the cputlb helpers where we do have the helper return address. This allows watchpoints on RAM to bypass the full i/o access path. Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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