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Add support for v8 page table walks. This supports stage 1 translations
for 4KB, 16KB and 64KB page sizes starting with 0 or 1 level.
Signed-off-by: Rob Herring <rob.herring@linaro.org>
[PMM: fix style nits, fold in 16/64K page support patch, use
arm_el_is_aa64() to decide whether to do 64 bit page table walk]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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The current A32/T32 decoder bases its "is VFP/Neon enabled?" check
on the FPSCR.EN bit. This is correct if EL1 is AArch32, but for
an AArch64 EL1 the logic is different: it must act as if FPSCR.EN
is always set. Instead, trapping must happen according to CPACR
bits for cp10/cp11; these cover all of FP/Neon, including the
FPSCR/FPSID/MVFR register accesses which FPSCR.EN does not affect.
Add support for CPACR checks (which are also required for ARMv7,
but were unimplemented because Linux happens not to use them)
and make sure they generate exceptions with the correct syndrome.
We actually return incorrect syndrome information for cases
where FP is disabled but the specific instruction bit pattern
is unallocated: strictly these should be the Uncategorized
exception, not a "SIMD disabled" exception. This should be
mostly harmless, and the structure of the A32/T32 VFP/Neon
decoder makes it painful to put the 'FP disabled?' checks in
the right places.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Because unallocated encodings generate different exception syndrome
information from traps due to FP being disabled, we can't do a single
"is fp access disabled" check at a high level in the decode tree.
To help in catching bugs where the access check was forgotten in some
code path, we set this flag when the access check is done, and assert
that it is set at the point where we actually touch the FP regs.
This requires us to pass the DisasContext to the vec_reg_offset
and fp_reg_offset functions.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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For the A64 instruction set, the only FP/Neon disable trap
is the CPACR FPEN bits, which may indicate "enabled", "disabled"
or "disabled for EL0". Add a bit to the AArch64 tb flags indicating
whether FP/Neon access is currently enabled and make the decoder
emit code to raise exceptions on use of FP/Neon insns if it is not.
We use a new flag in DisasContext rather than borrowing the
existing vfp_enabled flag because the A32/T32 decoder is going
to need both.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
I'm aware this is a rather hard to review patch; sorry.
I have done an exhaustive check that we have fp access checks
in all code paths with the aid of the assertions added in the
next patch plus the code-coverage hack patch I posted to the
list earlier.
For the record, this patch is correct for all commits up to:
target-arm: A64: Implement remaining 3-same instructions
If we add further SIMD instructions before this patch hits
master, it will need additional fp access check hunks...
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Add new helpers exception_with_syndrome (for generating an exception
with syndrome information) and exception_uncategorized (for generating
an exception with "Unknown or Uncategorized Reason", which have a syndrome
register value of zero), and use them to generate the correct syndrome
information for exceptions which are raised directly from generated code.
This patch includes moving the A32/T32 gen_exception_insn functions
further up in the source file; they will be needed for "VFP/Neon disabled"
exception generation later.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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For exceptions taken to AArch64, if a coprocessor/system register
access fails due to a trap or enable bit then the syndrome information
must include details of the failing instruction (crn/crm/opc1/opc2
fields, etc). Make the decoder construct the syndrome information
at translate time so it can be passed at runtime to the access-check
helper function and used as required.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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For AArch32 exceptions, the only information provided about
the cause of an exception is the individual exception type (data
abort, undef, etc), which we store in env->exception_index. For
AArch64, the CPU provides much more detail about the cause of
the exception, which can be found in the syndrome register.
Create a set of fields in CPUARMState which must be filled in
whenever an exception is raised, so that exception entry can
correctly fill in the syndrome register for the guest.
This includes the information which in AArch32 appears in
the DFAR and IFAR (fault address registers) and the DFSR
and IFSR (fault status registers) for data aborts and
prefetch aborts, since if we end up taking the MMU fault
to AArch64 rather than AArch32 this will need to end up
in different system registers.
This patch does a refactoring which moves the setting of the
AArch32 DFAR/DFSR/IFAR/IFSR from the point where the exception
is raised to the point where it is taken. (This is no change
for cores with an MMU, retains the existing clearly incorrect
behaviour for ARM946 of trashing the MP access permissions
registers which share the c5_data and c5_insn state fields,
and has no effect for v7M because we don't implement its
MPU fault status or address registers.)
As a side effect of the cleanup we fix a bug in the AArch64
linux-user mode code where we were passing a 64 bit fault
address through the 32 bit c6_data/c6_insn fields: it now
goes via the always-64-bit exception.vaddress.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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There are various situations where we need to behave differently
depending on whether a given exception level is in AArch64 or
AArch32 state. The state of the current exception level is stored
in env->aarch64, but there's no equivalent guest-visible architected
state bits for the status of the exception levels "above" the
current one which may still affect execution. At the moment we
only support EL1 (ie no EL2 or EL3) and insist that AArch64
capable CPUs run with EL1 in AArch64 state, but these may change
in the future, so abstract out the "what state is this?" check
into a utility function which can be enhanced later if necessary.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Implement the AArch64 view of the CPACR. The AArch64
CPACR is defined to have a lot of RES0 bits, but since
the architecture defines that RES0 bits may be implemented
as reads-as-written and we know that a v8 CPU will have
no registered coprocessors for cp0..cp13 we can safely
implement the whole register this way.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Implement the MSR (immediate) instructions, which can update the
PSTATE SP and DAIF fields.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Implement the DAIF system register which is a view of the
DAIF bits in PSTATE.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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To avoid complication in code that otherwise would not need to
care about whether EL1 is AArch32 or AArch64, we should store
the interrupt mask bits (CPSR.AIF in AArch32 and PSTATE.DAIF
in AArch64) in one place consistently regardless of EL1's mode.
Since AArch64 has an extra enable bit (D for debug exceptions)
which isn't visible in AArch32, this means we need to keep
the enables in env->pstate. (This is also consistent with the
general approach we're taking that we handle 32 bit CPUs as
being like AArch64/ARMv8 CPUs but which only run in 32 bit mode.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Implement the WFI instruction for A64; this just involves wiring
up the instruction, and adding a gen_a64_set_pc_im() which was
accidentally omitted from the A64 decoder top loop.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Emit the correct MMU index information for loads and stores from
A64 code, rather than hardwiring it to "always kernel mode",
by storing the exception level in the TB flags, and make
cpu_mmu_index() return the right answer when the CPU is in
AArch64 mode.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Define a dummy version of the AArch64 OSLAR_EL1 system register
which just ignores writes. Linux will always write to this (it
is the OS lock used for debugging), but we don't support debug.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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In AArch64 the breakpoint and watchpoint registers are mandatory, so the
kernel always accesses them on bootup. Implement dummy versions, which
read as written but have no actual effect.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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Implement the AArch64-specific ID and feature registers. Although
many of these are currently not used by the architecture (and so
always zero for all implementations), we define the full set of
fields in the ARMCPU struct for symmetry.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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Implement the AArch64 view of the generic timer system registers.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Implement the AArch64 MPIDR system register.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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Implement the AArch64 TTBR* registers. For v7 these were already 64 bits
to handle LPAE, but implemented as two separate uint32_t fields.
Combine them into a single uint64_t which can be used for all purposes.
Since this requires touching every use, take the opportunity to rename
the field to the architectural name.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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Implement the A64 view of the VBAR system register.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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Implement the AArch64 TCR_EL1, which is the 64 bit view of
the AArch32 TTBCR. (The uses of the bits in the register are
completely different, but in any given situation the CPU will
always interpret them one way or the other. In fact for QEMU EL1
is always 64 bit, but we share the state field because this
is the correct mapping to permit a future implementation of EL2.)
We also make the AArch64 view the 'master' as far as migration
and reset is concerned.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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Implement the AArch64 view of the system control register SCTLR_EL1.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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Implement the AArch64 memory attribute registers. Since QEMU doesn't
model caches it does not need to care about memory attributes at all,
and we can simply make these read-as-written.
We did not previously implement the AArch32 versions of the MAIR
registers, which went unnoticed because of the overbroad TLB_LOCKDOWN
reginfo definition; provide them now to keep the 64<->32 register
relationship clear.
We already provided AMAIR registers for 32 bit as simple RAZ/WI;
extend that to provide a 64 bit RAZ/WI AMAIR_EL1.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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We don't support letting the guest do debug, but Linux prods the
monitor debug system control register anyway, so implement a dummy
RAZ/WI version.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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Implement the AArch64 TLB invalidate operations. This is
the full set of TLBI ops defined for a CPU which doesn't
implement EL2 or EL3.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Implement all the AArch64 cache invalidate and clean ops
(which are all NOPs since QEMU doesn't emulate the cache).
The only remaining unimplemented cache op is DC ZVA.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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Implement the AArch64 view of the MIDR system register
(for AArch64 it is a simple constant, unlike the complicated
mess that TI925 imposes on the 32-bit view).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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Implement the CurrentEL sysreg.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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Make the cache ID system registers (CLIDR, CSSELR, CCSIDR, CTR)
visible to AArch64. These are mostly simple 64-bit extensions of the
existing 32 bit system registers and so can share reginfo definitions.
CTR needs to have a split definition, but we can clean up the
temporary user-mode implementation in favour of using the CPU-specified
reset value, and implement the system-mode-required semantics of
restricting its EL0 accessibility if SCTLR.UCT is not set.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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The raw read and write functions were using the ARM_CP_64BIT flag in
ri->type to determine whether to treat the register's state field as
uint32_t or uint64_t; however AArch64 register info structs don't use
that flag. Abstract out the "how big is the field?" test into a
function and fix it to work for AArch64 registers. For this to work
we must ensure that the reginfo structs put into the hashtable have
the correct state field for their use, not the placeholder STATE_BOTH.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Implement the PMULL instruction; this is the last unimplemented insn
in the three-reg-diff group.
Note that PMULL with size 3 is considered part of the AES part
of the crypto extensions (see the ID_AA64ISAR0_EL1 register definition
in the v8 ARM ARM), so it isn't necessary to burn an extra feature
bit on it, even though we're using more feature bits than a single
"crypto extension present/not present" toggle.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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'remotes/pmaydell/tags/pull-target-arm-20140220' into staging
target-arm queue:
* Fix a bug causing an assertion in the NVIC on ARMv7M models
* More A64 Neon instructions
* Refactor cpreg API to separate out access check functions, as
groundwork for AArch64 system mode
* Fix bug in linux-user A64 store-exclusive of XZR
# gpg: Signature made Thu 20 Feb 2014 11:12:57 GMT using RSA key ID 14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
* remotes/pmaydell/tags/pull-target-arm-20140220: (30 commits)
linux-user: AArch64: Fix exclusive store of the zero register
target-arm: A64: Implement unprivileged load/store
target-arm: A64: Implement narrowing three-reg-diff operations
target-arm: A64: Implement the wide 3-reg-different operations
target-arm: A64: Add most remaining three-reg-diff widening ops
target-arm: A64: Add opcode comments to disas_simd_three_reg_diff
target-arm: A64: Implement store-exclusive for system mode
target-arm: Fix incorrect type for value argument to write_raw_cp_reg
target-arm: Remove failure status return from read/write_raw_cp_reg
target-arm: Remove unnecessary code now read/write fns can't fail
target-arm: Drop success/fail return from cpreg read and write functions
target-arm: Convert miscellaneous reginfo structs to accessfn
target-arm: Convert generic timer reginfo to accessfn
target-arm: Convert performance monitor reginfo to accessfn
target-arm: Split cpreg access checks out from read/write functions
target-arm: Stop underdecoding ARM946 PRBS registers
target-arm: Log bad system register accesses with LOG_UNIMP
target-arm: Remove unused ARMCPUState sr substruct
target-arm: Restrict check_ap() use of S and R bits to v6 and earlier
target-arm: Define names for SCTLR bits
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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'remotes/stefanha/tags/qtest-monitor-process-pull-request' into staging
qtest resource cleanup pull request
# gpg: Signature made Wed 19 Feb 2014 14:46:34 GMT using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35 775A 9CA4 ABB3 81AB 73C8
* remotes/stefanha/tags/qtest-monitor-process-pull-request:
qtest: kill QEMU process on g_assert() failure
qtest: make QEMU our direct child process
qtest: drop unused child_pid field
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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into staging
Tracing pull request
# gpg: Signature made Wed 19 Feb 2014 15:42:20 GMT using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35 775A 9CA4 ABB3 81AB 73C8
* remotes/stefanha/tags/tracing-pull-request:
trace-events: Fix typo in "offset"
Add ust generated files to .gitignore
Update documentation for LTTng ust tracing
Adapt Makefiles to the new LTTng ust interface
Modified the tracetool framework for LTTng 2.x
Fix configure script for LTTng 2.x
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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This fixes a target-i386 emulation regression
# gpg: Signature made Wed 19 Feb 2014 15:42:12 GMT using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
* remotes/kevin/tags/for-upstream:
target-i386: Fix I/O bitmap checks for in/out
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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* remotes/riku/linux-user-for-upstream:
linux-user: Fix error handling in target_to_host_semarray()
linux-user: Implement BLKPG ioctl
linux-user: Fix error handling in lock_iovec()
linux-user/signal.c: Don't pass sigaction uninitialised sa_flags
linux-user/elfload.c: Avoid calling g_free() on uninitialized data
linux-user: sync syscall numbers upto 3.13
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Win32 doesn't have a cpuid.h, and MacOSX may have one but without
the __cpuid() function we use, which means that commit 9d2eec20
broke the build for those platforms. Fix this by tightening up
our configure cpuid.h check to test that the functions we need
are present, and adding some missing #ifdef guards in
tcg/i386/tcg-target.c.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
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- xhci improvements and fixes.
- uhci bugfix.
- cleanups.
# gpg: Signature made Tue 18 Feb 2014 15:48:10 GMT using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg: aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg: aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
* remotes/kraxel/tags/pull-usb-3:
xhci: use DPRINTF() instead of fprintf(stderr, ...)
xhci: switch debug printf to tracepoint
xhci iso: allow for some latency
xhci iso: fix time calculation
uhci: invalidate queue on device address changes
xhci: fix overflow in usb_xhci_post_load
usb: Remove magic constants from device bmAttributes
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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* remotes/rth/tcg-next:
tcg/i386: Use SHLX/SHRX/SARX instructions
tcg/i386: Use ANDN instruction
tcg/i386: Add tcg_out_vex_modrm
tcg/i386: Move TCG_CT_CONST_* to tcg-target.c
disas/i386: Disassemble ANDN/SHLX/SHRX/SHAX
tcg/optimize: Add more identity simplifications
tcg/optimize: Optmize ANDC X,Y,Y to MOV X,0
tcg/optimize: Simply some logical ops to NOT
tcg/optimize: Handle known-zeros masks for ANDC
tcg/optimize: add known-zero bits compute for load ops
tcg/optimize: improve known-zero bits for 32-bit ops
tcg/optimize: fix known-zero bits optimization
tcg/optimize: fix known-zero bits for right shift ops
tcg-arm: The shift count of op_rotl_i32 is in args[2] not args[1].
TCG: Fix 32-bit host allocation typo
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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into staging
QOM infrastructure fixes and device conversions
* QTest cleanups and test cases for PCI NICs
* NAND fix for "info qtree"
* Cleanup and extension of QOM machine tests
* IndustryPack test cases and conversion to QOM realize
* I2C cleanups
* Cleanups of legacy qdev properties
# gpg: Signature made Mon 17 Feb 2014 22:15:37 GMT using RSA key ID 3E7E013F
# gpg: Good signature from "Andreas Färber <afaerber@suse.de>"
# gpg: aka "Andreas Färber <afaerber@suse.com>"
* remotes/afaerber/tags/qom-devices-for-peter: (49 commits)
qtest: Include system headers before user headers
qapi: Refine human printing of sizes
qdev: Use QAPI type names for properties
qdev: Add enum property types to QAPI schema
block: Handle "rechs" and "large" translation options
qdev: Remove hex8/32/64 property types
qdev: Remove most legacy printers
qdev: Use human mode in "info qtree"
qapi: Add human mode to StringOutputVisitor
qdev: Inline qdev_prop_parse()
qdev: Legacy properties are just strings
qdev: Legacy properties are now read-only
qdev: Remove legacy parsers for hex8/32/64
qdev: Sizes are now parsed by StringInputVisitor
qapi: Add size parser to StringInputVisitor
qtest: Don't segfault with invalid -qtest option
ipack: Move IndustryPack out of hw/char/
ipoctal232: QOM parent field cleanup
ipack: QOM parent field cleanup for IPackDevice
ipack: QOM parent field cleanup for IPackBus
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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* remotes/qmp-unstable/queue/qmp:
monitor: Add object_add class argument completion.
monitor: Add object_del id argument completion.
monitor: Add device_add device argument completion.
monitor: Add device_del id argument completion.
qmp: expose list of supported character device backends
Use error_is_set() only when necessary
QMP: allow JSON dict arguments in qmp-shell
hmp: migrate command (without -d) now blocks correctly
Conflicts:
blockdev.c
[PMM: resolved trivial conflict in blockdev.c]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Signed-off-by: Janne Grunau <j@jannau.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Implement the unprivileged load and store instructions.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
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Implement the narrowing three-reg-diff operations: ADDHN,
RADDHN, SUBHN and RSUBHN.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
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Implement the wide three-reg-different operations:
SADDW, UADDW, SSUBW and USUBW.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
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Add the remainder of the 64x64->128 operations in the three-reg-diff
category except for PMULL, PMULL2.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
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The opcode switch in disas_simd_three_reg_diff() is missing the
customary comments indicating which cases correspond to which
instructions. Add them.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
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System mode store-exclusive use a different code path to usermode ones;
implement this missing code, in a similar way to the 32 bit version.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
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The write_raw_cp_reg's value argument should be a uint64_t, since
that's what all its callers hand it and what all the functions it
calls take. A (harmless) typo meant we were accidentally declaring
it as int64_t.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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