"The multiplier and multiplicand are both word operands, and the result
is a long-word operand."
So compute flags on a long-word result, not on a word result.
Backports commit 4a18cd44f3c905d443c26e26bb9b09932606d1a3 from qemu
"The size of the operation can be specified as word or long.
Word length source operands are sign-extended to 32 bits for
comparison."
So comparison is always done using OS_LONG.
Backports commit 5436c29d78957a6825a93f0eb79dfab388641017 from qemu
In the user emulation code path, tlb_vaddr_to_host erronesously passed
vaddr as the guest address to be translated, instead of addr, the parameter
which actually contained the guest address.
This resulted in incorrect addresses being used when emulating block copy
(mvc/mvpg) and block clear (xc) instructions for the s390x target.
Backports commit c2a85316902e67530da9d6548139fcce73c0cac6 from qemu
Include sys/user.h for declaration of 'struct kinfo_proc'.
Add -lutil to qemu-ga link for kinfo_getproc.
Backports commit a7764f1548ef9946af30a8f96be9cef10761f0c1 from qemu
The spec can be found in Intel Software Developer Manual or in
Instruction Set Extensions Programming Reference.
Backports commit 95ea69fb46266aaa46d0c8b7f0ba8c4903dbe4e3 from qemu
The memory_dispatch field is meant to be protected by RCU so we should
use the correct primitives when accessing it. This race was flagged up
by the ThreadSanitizer.
Backports commit f35e44e7645edbb08e35b111c10c2fc57e2905c7 from qemu
The version of tcg_gen_ld8s_i64 for 32-bit systems does a load into
the low part of the return value - then attempts a sign extension into
the high part, but wrongly sets the high part to a sign extension of
itself rather than of the low part. This results in TCG internal
errors from the use of the uninitialized high part (in some GCC tests
of AArch64 NEON shift intrinsics, in particular). This patch corrects
the sign-extension logic, making it match other functions such as
tcg_gen_ld16s_i64.
Backports commit 3ff91d7e85176f8b4b131163d7fd801757a2c949 from qemu
The typedefs we use for the TCGv_i32, TCGv_i64 and TCGv_ptr
types are somewhat confusing, because we define them as
pointers to structs, but the structs themselves are never
defined. Explain in the comments a bit more clearly why
this is OK and what is going on under the hood.
Backports commit a40d4701bc9f6e6a3bbfb7b4fbe756a5b72b5df1 from qemu
This multiply has one signed input and one unsigned input,
producing the full double-width result.
Backports commit 5087abfb7dfd1d368ae6939420057036b4d8e509 from qemu
The cpu is allowed to require stricter alignment on these 8- and 16-byte
operations, and the OS is required to fix up the accesses as necessary,
so the previous code was not wrong.
However, we can easily handle this misalignment for all direct 8-byte
operations and for direct 16-byte loads.
We must retain 16-byte alignment for 16-byte stores, so that we don't have
to probe for writability of a second page before performing the first of
two 8-byte stores. We also retain 8-byte alignment for no-fault loads,
since they are rare and it's not worth extending the helpers for this.
Backports commit cb21b4da6cca1bb4e3f5fefb698fb9e4d00c8f66 from qemu
At the same time, fix a problem with stqf_asi, when
a write might access two pages.
Backports commit f939ffe5a022a8798824e2720ed5a14186fca6b6 from qemu
Now that we never call out to helpers when direct accesses can
handle an asi, remove the corresponding code in those helpers.
For ldda, this removes the entire helper.
Backports commit 918d9a2c9d36378a3cf6636018900a4731c83b9d from qemu
As used by HelenOS, presumably for ultra 2 and 3,
prior to the sun4v platform and the current twinx names.
Backports commit 34a6e13da70b2c798630a8dbd03d09f201c0198f from qemu
It's handy to have a mmu idx for physical addresses, so
that mmu disabled and physical access asis can use the
same path as normal accesses.
Backports commit af7a06bac7d3abb2da48ef3277d2a415772d2ae8 from qemu
Several helpers call helper_raise_exception directly, which requires
in turn that their callers have performed save_state. The new function
allows a TCG return address to be passed in so that we can restore
PC + NPC + flags data from that.
This fixes a bug in the usage of helper_check_align, whose callers had
not been calling save_state. It fixes another bug in which the divide
helpers used GETPC at a level other than the direct callee from TCG.
This allows the translator to avoid save_state prior to SAVE, RESTORE,
and FLUSHW instructions.
Backports commit 2f9d35fc4006122bad33f9ae3e2e51d2263e98ee from qemu
In the linux-user case all things that involve ''l1_map' and PageDesc
tweaks are protected by the memory lock (mmpa_lock). For SoftMMU mode
we previously relied on single threaded behaviour, with MTTCG we now use
the tb_lock().
As a result we need to do a little re-factoring and push the taking of
this lock up the call tree. This requires a slightly different entry for
the SoftMMU and user-mode cases from tb_invalidate_phys_range.
This also means user-mode breakpoint insertion needs to take two locks
but it hadn't taken any previously so this is an improvement.
Backpoirts commit ba051fb5e56d5ff5e4fa672d37954452e58543b2 from qemu
softmmu requires more functions to be thread-safe, because translation
blocks can be invalidated from e.g. notdirty callbacks. Probably the
same holds for user-mode emulation, it's just that no one has ever
tried to produce a coherent locking there.
This patch will guide the introduction of more tb_lock and tb_unlock
calls for system emulation.
Note that after this patch some (most) of the mentioned functions are
still called outside tb_lock/tb_unlock. The next one will rectify this.
Backports commit 7d7500d99895f888f97397ef32bb536bb0df3b74 from qemu
This adds asserts to check the locking on the various translation
engines structures. There are two sets of structures that are protected
by locks.
The first the l1map and PageDesc structures used to track which
translation blocks are associated with which physical addresses. In
user-mode this is covered by the mmap_lock.
The second case are TB context related structures which are protected by
tb_lock which is also user-mode only.
Currently the asserts do nothing in SoftMMU mode but this will change
for MTTCG.
Backports commit 301e40ed8005306c009978be295ed9a4b725178b from qemu
Make the debug define consistent with the others. The flush operation is
all about invalidating TranslationBlocks on flush events.
Also fix up the commenting on the other DEBUG for the benefit of
checkpatch.
Backports commit 955939a2b51f72bea1c200b559ea39985df5a633 from qemu
Some files contain multiple #includes of the same header file.
Removed most of those unnecessary duplicate entries using
scripts/clean-includes.
Backports commit 814bb12a561d36aeb5ae4440ad43d2b0761d76da from qemu
This patch adds a pmu=[on/off] option to enable/disable vPMU support
in guest vCPU. It allows virt tools, such as libvirt, to determine the
exsitence of vPMU and configure it. Note this option is only available
for cortex-a57/cortex-53/ host CPUs, but unavailable on ARMv7 and other
processors. Also even though "pmu=" option is available for TCG mode,
setting it doesn't turn PMU on.
Backports commit 929e754d5a621cd53f30e69b766ccf381b58d124 from qemu
