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2012-05-19linux-user: Fix stale tbs after mmapAlexander Graf
If we execute linux-user code that does the following: * A = mmap() * execute code in A * munmap(A) * B = mmap(), but mmap returns the same address as A * execute code in B we end up executing a stale cached tb that contains translated code from A, while we want new code from B. This patch adds a TB flush for mmap'ed regions, before we return them, avoiding the whole issue. It also adds a flush for munmap, so that we don't execute stale TBs instead of getting a segfault. Reported-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Riku Voipio <riku.voipio@linaro.org> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-05-01cputlb: move TLB handling to a separate fileBlue Swirl
Move TLB handling and softmmu code load helpers to cputlb.c, compile only for softmmu targets. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-21tci: GETPC() macro must return an uintptr_tStefan Weil
Change the data type of tci_tb_ptr, so GETPC() returns an uintptr_t now (like for all other TCG targets). This completes commit 2050396801ca0c8359364d61eaadece951006057 and fixes builds with TCI. Signed-off-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-14exec: provide tb_invalidate_phys_addr functionMax Filippov
Allow TB invalidation by its physical address, extract implementation from the breakpoint_invalidate function. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-14Use uintptr_t for various op related functionsBlue Swirl
Use uintptr_t instead of void * or unsigned long in several op related functions, env->mem_io_pc and GETPC() macro. Reviewed-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-07Add QEMU_NORETURN to function cpu_io_recompileStefan Weil
cpu_io_recompile terminates by calling either cpu_abort or cpu_resume_from_signal which both never return. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-07Add QEMU_NORETURN to function cpu_resume_from_signalStefan Weil
cpu_resume_from_signal terminates by calling longjmp. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-07w64: Fix data type of tb_next and other variables used for host addressesStefan Weil
QEMU host addresses must use uintptr_t to be portable for hosts with an unusual size of long (w64). tb_jmp_offset is an uint16_t value, therefore the local variable offset in function tb_set_jmp_target was changed from unsigned long to uint16_t. The type cast to long in function tb_add_jump now also uses uintptr_t. For the bit operation used here, the signedness of the type cast does not matter. Some remaining unsigned long values are either only used for ARM assembler code or will be fixed in a later patch for PPC. v2: Fix signature of tb_find_pc in exec.c, too (hint from Blue Swirl, thanks). There remain lots of other long / unsigned long in exec.c which must be replaced by uintptr_t. This will be done in a separate patch. Here only one of these type casts is fixed. v3: Also fix signature of page_unprotect. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-18softmmu templates: optionally pass CPUState to memory access functionsBlue Swirl
Optionally, make memory access helpers take a parameter for CPUState instead of relying on global env. On most targets, perform simple moves to reorder registers. On i386, switch from regparm(3) calling convention to standard stack-based version. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-03-14Rename CPUState -> CPUArchStateAndreas Färber
Scripted conversion: for file in *.[hc] hw/*.[hc] hw/kvm/*.[hc] linux-user/*.[hc] linux-user/m68k/*.[hc] bsd-user/*.[hc] darwin-user/*.[hc] tcg/*/*.[hc] target-*/cpu.h; do sed -i "s/CPUState/CPUArchState/g" $file done All occurrences of CPUArchState are expected to be replaced by QOM CPUState, once all targets are QOM'ified and common fields have been extracted. Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2012-03-08memory: get rid of cpu_register_io_memory()Avi Kivity
The return value of cpu_register_io_memory() is no longer used anywhere, so we can remove it and all associated data and code. Signed-off-by: Avi Kivity <avi@redhat.com>
2012-03-08memory: dispatch directly via MemoryRegionAvi Kivity
Instead of indirecting via io_mem_region, dispatch directly through the MemoryRegion obtained from the iotlb or phys_page_find(). Signed-off-by: Avi Kivity <avi@redhat.com>
2012-03-08memory: store section indices in iotlb instead of io indicesAvi Kivity
A step towards eliminating io indices. Signed-off-by: Avi Kivity <avi@redhat.com>
2012-01-04Direct dispatch through MemoryRegionAvi Kivity
Now that all mmio goes through MemoryRegions, we can convert io_mem_opaque to be a MemoryRegion pointer, and remove the thunks that convert from old-style CPU{Read,Write}MemoryFunc to MemoryRegionOps. Signed-off-by: Avi Kivity <avi@redhat.com> Reviewed-by: Richard Henderson <rth@twiddle.net>
2012-01-04Uninline get_page_addr_code()Avi Kivity
Its use of IO_MEM_ROM and friends will later cause #include loops; and it is too large to merit inlining. Signed-off-by: Avi Kivity <avi@redhat.com> Reviewed-by: Richard Henderson <rth@twiddle.net>
2012-01-04Avoid range comparisons on io index typesAvi Kivity
The code sometimes uses range comparisons on io indexes (e.g. index =< IO_MEM_ROM). Avoid these as they make moving to objects harder. Signed-off-by: Avi Kivity <avi@redhat.com> Reviewed-by: Richard Henderson <rth@twiddle.net>
2012-01-04memory: move mmio access to functionsAvi Kivity
Currently mmio access goes directly to the io_mem_{read,write} arrays. In preparation for eliminating them, add indirection via a function. Signed-off-by: Avi Kivity <avi@redhat.com> Reviewed-by: Richard Henderson <rth@twiddle.net>
2011-10-31tcg: Add bytecode generator for tcg interpreterStefan Weil
Unlike other tcg target code generators, this one does not generate machine code for some cpu. It generates machine independent bytecode which is interpreted later. This allows running QEMU on any host. Interpreted bytecode is slower than direct execution of generated machine code. Signed-off-by: Stefan Weil <sw@weilnetz.de>
2011-10-30exec-all: Fix void pointer arithmeticStefan Weil
Adding an offset to a void pointer works with gcc but is not allowed by the current C standards. With -pedantic, gcc complains: exec-all.h:344: error: pointer of type ‘void *’ used in arithmetic Fix this, and also replace (unsigned long) by (uintptr_t) in the same statement. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-10-21qemu-timer: move icount to cpus.cPaolo Bonzini
None of this is needed by tools, and most of it can even be made static inside cpus.c. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2011-10-01Move GETPC from dyngen-exec.h to exec-all.hBlue Swirl
GETPC() can be used even from outside of helper code. Move the macro to a more accessible location. Avoid a compile warning from redefining it in exec.c. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-10-01softmmu_header: pass CPUState to tlb_fillBlue Swirl
Pass CPUState pointer to tlb_fill() instead of architecture local cpu_single_env hacks. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-07-20Fix unassigned memory access handlingBlue Swirl
cea5f9a28faa528b6b1b117c9ab2d8828f473fef exposed bugs in unassigned memory access handling. Fix them by always passing CPUState to the handlers. Reported-by: Hervé Poussineau <hpoussin@reactos.org> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-07-12exec-all.h: Make MAX_OP_PER_INSTR large enough for target-arm's usesPeter Maydell
The target-arm frontend's worst-case TCG ops per instr is 194 (and in general many of the "load multiple registers" ARM instructions generate more than 100 TCG ops). Raise MAX_OP_PER_INSTR accordingly to avoid possible buffer overruns. Since it doesn't make any sense for the "64 bit guest on 32 bit host" case to have a smaller limit than the normal case, we collapse the two cases back into each other again. (This increase costs us about 14K in extra static buffer space and 21K of extra margin at the end of a 32MB codegen buffer.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-06-26Move cpu_has_work and cpu_pc_from_tb to cpu.hBlue Swirl
Move functions cpu_has_work() and cpu_pc_from_tb() from exec.h to cpu.h. This is needed by later patches. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-06-26cpu_loop_exit: avoid using AREG0Blue Swirl
Make cpu_loop_exit() take a parameter for CPUState instead of relying on global env. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-05-31target-alpha: Trap for unassigned and unaligned addresses.Richard Henderson
Signed-off-by: Richard Henderson <rth@twiddle.net>
2011-05-23Merge branch 's390-next' of git://repo.or.cz/qemu/agrafAurelien Jarno
* 's390-next' of git://repo.or.cz/qemu/agraf: s390x: complain when allocating ram fails s390x: fix memory detection for guests > 64GB s390x: change mapping base to allow guests > 2GB s390x: Fix debugging for unknown sigp order codes s390x: build s390x by default s390x: remove compatibility cc field s390x: Adjust GDB stub s390x: translate engine for s390x CPU s390x: Adjust internal kvm code s390x: Implement opcode helpers s390x: helper functions for system emulation s390x: Shift variables in CPUState for memset(0) s390x: keep hint on virtio managing size s390x: make kvm exported functions conditional on kvm s390x: s390x-linux-user support tcg: extend max tcg opcodes when using 64-on-32bit s390x: fix smp support for kvm
2011-05-22Delete unused tb_invalidate_page_rangeBlue Swirl
tb_invalidate_page_range() was intended to be used to invalidate an area of a TB which the guest explicitly flushes from i-cache. However, QEMU detects writes to code areas where TBs have been generated, so his has never been useful. Delete the function, adjust callers. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-05-20tcg: extend max tcg opcodes when using 64-on-32bitAlexander Graf
When running a 64 bit guest on a 32 bit host, we tend to use more TCG ops than on a 64 bit host. Reflect that in the reserved opcode amount constant. Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-20Remove unused function parameter from cpu_restore_stateStefan Weil
The previous patch removed the need for parameter puc. Is is now unused, so remove it. Cc: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Stefan Weil <weil@mail.berlios.de>
2011-04-20Remove unused function parameters from gen_pc_load and rename the functionStefan Weil
Function gen_pc_load was introduced in commit d2856f1ad4c259e5766847c49acbb4e390731bd4. The only reason for parameter searched_pc was a debug statement in target-i386/translate.c. Parameter puc was needed by target-sparc until commit d7da2a10402f1644128b66414ca8f86bdea9ae7c. Remove searched_pc from the debug statement and remove both parameters from the parameter list of gen_pc_load. As the function name gen_pc_load was also misleading, it is now called restore_state_to_opc. This new name was suggested by Peter Maydell, thanks. v2: Remove last parameter, too, and rename the function. v3: Fix [] typo in target-arm/translate.c. Fix wrong SHA1 object name in commit message (copy+paste error). Cc: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Stefan Weil <weil@mail.berlios.de>
2011-02-10Make tb_alloc staticTristan Gingold
This function is only used within exec.c, so no need to make it public. Signed-off-by: Tristan Gingold <gingold@adacore.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-23Delete useless 'extern' qualifiers for functionsBlue Swirl
'extern' qualifier is useless for function declarations. Delete them. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-12-31TCG: Improve tb_phys_hash_func()Aurelien Jarno
Most of emulated CPU have instructions aligned on 16 or 32 bits, while on others GCC tries to align the target jump location. This means that 1/2 or 3/4 of tb_phys_hash entries are never used. Update the hash function tb_phys_hash_func() to ignore the two lowest bits of the address. This brings a 6% speed-up when booting a MIPS image. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-12-21tcg-arm: fix __clear_cache() warningAurelien Jarno
Use __builtin___clear_cache() instead of __clear_cache() to avoid having to define the function as extern. Fix the following warning: | In file included from qemu/cpus.c:34: | qemu/exec-all.h: In function 'tb_set_jmp_target1': | qemu/exec-all.h:208: error: nested extern declaration of '__clear_cache' | make[1]: *** [cpus.o] Error 1 | make: *** [subdir-i386-softmmu] Error 2 Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-10-20Export qemu_ram_addr_from_hostMarcelo Tosatti
To be used by next patches. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-07-24remove dead codeJun Koi
this patch removes unused function cpu_restore_state_copy(). Signed-off-by: Jun Koi <junkoi2004@gmail.com> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2010-07-22Declare code_gen_ptr, code_gen_max_blocks 'static'Stefan Weil
Both values are only used in exec.c, so there is no need to make them globally available. Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-06-09tcg: get rid of copy_size in TCGOpDefAurelien Jarno
copy_size is a left-over from the dyngen era, remove it. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-05-11make SIG_IPI to tcg vcpu thread reliableMarcelo Tosatti
Store tcg loop exit request on a global variable, and transfer it to per-CPUState exit_request after assignment of cpu_single_env. This makes exit request signal from robust. Drop the timedlock hack. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-05-01Clean up definition of MAX_OPC_PARAMStuart Brady
MAX_OPC_PARAM is intended to refer to the maximum number of entries used in gen_opparam_buf[] for any single helper call. It is currently defined as 10, but for 32-bit archs, the correct value (with a maximum for four helper arguments) is 14, and for 64-bit archs, only 9 entries are needed. tcg_gen_callN() fills four entries with the function address, flags, number of args, etc. and on 32-bit archs uses a further two entries per argument (with a maximum of four helper arguments), plus two more for the return value. On 64-bit archs, only half as many entries are used for the args and the return value. In reality, TBs tend not to consist purely of helper calls exceeding the stated 10 gen_opparam_buf[] entries, so this would never actually be a problem on 32-bit archs, but the definition is still rather confusing. Signed-off-by: Stuart Brady <sdb@zubnet.me.uk> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-04-08remove TARGET_* defines from translate-all.cPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-04-08Shrink tb_jmp_offset to two entries, the other two are never used.Filip Navara
Signed-Off-By: Riku Voipio <riku.voipio@nokia.com> Signed-off-by: Filip Navara <filip.navara@gmail.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-03-29Compile qemu-timer only onceBlue Swirl
Arrange various declarations so that also non-CPU code can access them, adjust users. Move CPU specific code to cpus.c. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-03-17Large page TLB flushPaul Brook
QEMU uses a fixed page size for the CPU TLB. If the guest uses large pages then we effectively split these into multiple smaller pages, and populate the corresponding TLB entries on demand. When the guest invalidates the TLB by virtual address we must invalidate all entries covered by the large page. However the address used to invalidate the entry may not be present in the QEMU TLB, so we do not know which regions to clear. Implementing a full vaiable size TLB is hard and slow, so just keep a simple address/mask pair to record which addresses may have been mapped by large pages. If the guest invalidates this region then flush the whole TLB. Signed-off-by: Paul Brook <paul@codesourcery.com>
2010-03-12Fix usermode virtual address typePaul Brook
Usermode virtual addresses are abi_ulong, not target_ulong. Signed-off-by: Paul Brook <paul@codesourcery.com>
2010-03-12Disable phsyical memory handling in userspace emulation.Paul Brook
Code to handle physical memory access is not meaningful in usrmode emulation, so disable it. Signed-off-by: Paul Brook <paul@codesourcery.com>
2010-03-12Add tb_page_addr_tPaul Brook
The page tracking code in exec.c is used by both userspace and system emulation. Userspace emulation uses it to track virtual pages, and system emulation to track ram pages. Introduce a new type to hold this kind of address. Signed-off-by: Paul Brook <paul@codesourcery.com>
2010-03-01Avoid tlb_set_page in userspace emulationPaul Brook
tlb_set_page isn't meaningful for userspace emulation, so remove it. Signed-off-by: Paul Brook <paul@codesourcery.com>
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