Commit graph

4285 commits

Author SHA1 Message Date
Richard Henderson 1721e429c2
target/arm: Implement ARMv8.0-SB
Backports commit 9888bd1e20425dfe4dcca5dcd1ca2fac8e90ad19 from qemu
2019-03-05 22:35:16 -05:00
Richard Henderson a552a7b2e0
target/arm: Split out arm_sctlr
Minimize the number of places that will need updating when
the virtual host extensions are added.

Backports commit 64e40755cd41fbe8cd266cf387e42ddc57a449ef from qemu
2019-03-05 22:29:25 -05:00
Richard Henderson fa70a2bc69
target/arm: Fix PC test for LDM (exception return)
Found by inspection: Rn is the base register against which the
load began; I is the register within the mask being processed.
The exception return should of course be processed from the loaded PC.

Backports commit 9d090d17234058f55c3c439d285db78c94d7d4de from qemu
2019-03-05 22:27:38 -05:00
Lioncash 7a6f61057b
target/m68k: Correct instruction emulation
Previously we weren't even initializing the instruction table, so any
attempt at emulation would cause a segmentation fault.

This also moves the end address check after the decoding to correctly
perform exiting behavior with the new translator model.
2019-02-28 19:21:49 -05:00
Lioncash 0868015992
target/arm: Move TCGContext variable within arm_post_translate_insn into a narrower scope
This is only used within the scope of the if statement, so we can just
move it there.
2019-02-28 18:53:33 -05:00
Lioncash 15440a83c5
target/arm: Fix execution of ARM instructions
Previously we'd be checking prior to the actual decoding if we were at
the ending address. This worked fine using the old model of the
translation process in qemu. However, this causes the wrong behavior to
occur in both ARM and Thumb/Thumb-2 modes using the newer translator
model.

Given the translator itself checks for the end address already, this
needs to be placed within arm_post_translate_insn().

This prevents the emulation process being off-by-one as well when it
comes to actually executing the instructions.
2019-02-28 18:49:22 -05:00
dmarxn 7164ab5ff4
changed cpu_compue_eflags to use the updated eflags variable. Otherwise, cli/sti and popfl may break, as we get the non-updated eflags (#1057)
Backports commit 360e9c60e1feb4a93e7e43f30858e38eac2d35f2 from unicorn
2019-02-28 17:05:13 -05:00
nanoric 245d2070fe
[Fix] Add feature support for CMPXCHG16B instruction. (#983)
Backports commit 2a240079d8fa4f1c77208379338c676ac6bf18ce from unicorn
2019-02-28 17:03:08 -05:00
nanoric 9e8e5645fc
[Fix] Fix a problem that use uc_reg_write to write fs, gs has no effets in x86 64-bit mode. (#984)
Backports commit a2493a0d4121b671fe9d16e41a9bdd3307b7b1ef from unicorn.
2019-02-28 16:52:54 -05:00
BrunoPujos 1d4bfd9aca
i386: set MSR IA32_EFER to correct value at init for IA32e Mode (#1047)
Backports commit 536c4e77c4350fac3e5c2b9b57d8c16f69b934d3 from unicorn.
2019-02-28 16:49:31 -05:00
cfrantz 5ad3a0ea82
Add support for the ARM IPSR register. (#1067)
1. Create an enum name for the IPSR register.
2. Implement read and write of the IPSR via the xpsr helper functions.

Fixes #1065

Backports commit 6c319941a5462ee3a4af4593c371f5674394d6ce from unicorn.
2019-02-28 16:40:54 -05:00
dmarxn cdcd026413
target/i386: Added MXCSR register, fixed writing to FPUCW. (#1059)
* Added MXCSR register for reading and writing
* Changed writing for fpucw register, now the qemu rounding status is updated as well

Backports commit 256e7782ceafb1f8915da167040d5368c38f9585 from unicorn
2019-02-28 16:31:22 -05:00
Lioncash 2b5d424ded
target/mips: Amend botched rename 2019-02-28 16:21:09 -05:00
Mateja Marjanovic d50a1fef6b
target/mips: Preparing for adding MMI instructions
Set up MMI code to be compiled only for TARGET_MIPS64. This is
needed so that GPRs are 64 bit, and combined with MMI registers,
they will form full 128 bit registers.

Backports commit 37b9aae2e6e005e6df206a0b4804972460806166 from qemu
2019-02-28 16:15:47 -05:00
Richard Henderson fbe1ee25ff
target/arm: Enable ARMv8.2-FHM for -cpu max
Backports commit 991c05995a7bbafbebc1e4d405e947f2edcee063 from qemu
2019-02-28 15:47:03 -05:00
Richard Henderson 4ae3ff8e61
target/arm: Implement VFMAL and VFMSL for aarch32
Backports commit 87732318c5d68a366fc2d6fc394d9c20412099fa from qemu
2019-02-28 15:44:59 -05:00
Richard Henderson 625d3f3cfb
target/arm: Implement FMLAL and FMLSL for aarch64
Backports commit 0caa5af802ff622c854ff4ee2e2b8cdd135b4d73 from qemu
2019-02-28 15:36:41 -05:00
Richard Henderson 5473c3603f
target/arm: Add helpers for FMLAL
Note that float16_to_float32 rightly squashes SNaN to QNaN.
But of course pickNaNMulAdd, for ARM, selects SNaNs first.
So we have to preserve SNaN long enough for the correct NaN
to be selected. Thus float16_to_float32_by_bits.

Backports commit a4e943a716d5fac923d82df3eabc65d1e3624019 from qemu
2019-02-28 15:31:48 -05:00
Peter Maydell 82b8e97f76
target/arm: Gate "miscellaneous FP" insns by ID register field
There is a set of VFP instructions which we implement in
disas_vfp_v8_insn() and gate on the ARM_FEATURE_V8 bit.
These were all first introduced in v8 for A-profile, but in
M-profile they appeared in v7M. Gate them on the MVFR2
FPMisc field instead, and rename the function appropriately.

Backports commit c0c760afe800b60b48c80ddf3509fec413594778 from qemu
2019-02-28 15:26:27 -05:00
Peter Maydell 118a2bde5c
target/arm: Use MVFR1 feature bits to gate A32/T32 FP16 instructions
Instead of gating the A32/T32 FP16 conversion instructions on
the ARM_FEATURE_VFP_FP16 flag, switch to our new approach of
looking at ID register bits. In this case MVFR1 fields FPHP
and SIMDHP indicate the presence of these insns.

This change doesn't alter behaviour for any of our CPUs.

Backports commit 602f6e42cfbfe9278be34e9b91d2ceb695837e02 from qemu
2019-02-28 15:23:51 -05:00
Lioncash 4f210d0731
header_gen: Add float128_to_uint32 to the list
Avoids multiple definition errors.
2019-02-28 15:19:44 -05:00
Richard Henderson 11679ff3cf
softfloat: Support float_round_to_odd more places
Previously this was only supported for roundAndPackFloat64.

New support in round_canonical, round_to_int, float128_round_to_int,
roundAndPackFloat32, roundAndPackInt32, roundAndPackInt64,
roundAndPackUint64. This does not include any of the floatx80 routines,
as we do not have users for that rounding mode there.

Backports commit 5d64abb32ffe558e616545819f3e53dd66335994 from qemu
2019-02-28 15:17:38 -05:00
David Hildenbrand 7373819b1a
softfloat: Implement float128_to_uint32
Handling it just like float128_to_uint32_round_to_zero, that hopefully
is free of bugs :)

Documentation basically copied from float128_to_uint64

Backports commit e45de9922e43c1ce4f4739b62142314a13029d5c from qemu
2019-02-28 15:13:09 -05:00
David Hildenbrand 24a2bd702c
softfloat: add float128_is_{normal,denormal}
Needed on s390x, to test for the data class of a number. So it will
gain soon a user.

A number is considered normal if the exponent is neither 0 nor all 1's.
That can be checked by adding 1 to the exponent, and comparing against
>= 2 after dropping an eventual overflow into the sign bit.

While at it, convert the other floatXX_is_normal functions to use a
similar, less error prone calculation, as suggested by Richard H.

Backports commit 47393181604d507f4fe2a15a65b1eede0f974d6a from qemu
2019-02-28 15:11:50 -05:00
Lioncash b9da32241b
header_gen: Correct multiple definition errors 2019-02-27 17:03:28 -05:00
Lioncash f2ff870171
Fix arm build 2019-02-22 21:00:04 -05:00
David Hildenbrand 8583c8f1f6
include/exec/helper-head.h: support "const void *" in helper calls
Especially when dealing with out-of-line gvec helpers, it is often
helpful to specify some vector pointers as constant. E.g. when
we have two inputs and one output, marking the two inputs as consts
pointers helps to avoid bugs.

Const pointers can be specified via "cptr", however behave in TCG just
like ordinary pointers. We can specify helpers like:

DEF_HELPER_FLAGS_4(gvec_vbperm, TCG_CALL_NO_RWG, void, ptr, cptr, cptr, i32)

void HELPER(gvec_vbperm)(void *v1, const void *v2, const void *v3,
uint32_t desc)

And make sure that here, only v1 will be written (as long as const is
not casted away, of course).

Backports commit 8c6edfdd90522caa4fc429144d393aba5b99f584 from qemu
2019-02-22 19:12:09 -05:00
Richard Henderson b9156a0f55
tcg: Remove TODO file
The last update to this file was 9 years ago. In the meantime,
4 of the 6 ideas have actually been completed. The lat two do
not actually make sense anymore.

Backports commit 9e564a1dde5abc7ae4cebc115142f685d98938d7 from qemu
2019-02-22 19:10:26 -05:00
Richard Henderson c9ad233678
target/arm: Implement ARMv8.3-JSConv
Backports commit 6c1f6f2733a7692793135ea5ce72b829add99a50 from qemu
2019-02-22 19:08:57 -05:00
Richard Henderson f16dcbe226
target/arm: Rearrange Floating-point data-processing (2 regs)
There are lots of special cases within these insns. Split the
major argument decode/loading/saving into no_output (compares),
rd_is_dp, and rm_is_dp.

We still need to special case argument load for compare (rd as
input, rm as zero) and vcvt fixed (rd as input+output), but lots
of special cases do disappear.

Now that we have a full switch at the beginning, hoist the ISA
checks from the code generation.

Backports commit e80941bd64cc388554770fd72334e9e7d459a1ef from qemu
2019-02-22 18:57:25 -05:00
Richard Henderson dbe623dacc
target/arm: Split out vfp_helper.c
Move all of the fp helpers out of helper.c into a new file.
This is code movement only. Since helper.c has no copyright
header, take the one from cpu.h for the new file.

Backports commit 37356079fcdb34e13abbed8ea0c00ca880c31247 from qemu
2019-02-22 18:48:44 -05:00
Richard Henderson d6fbc0f4f3
target/arm: Restructure disas_fp_int_conv
For opcodes 0-5, move some if conditions into the structure
of a switch statement. For opcodes 6 & 7, decode everything
at once with a second switch.

Backports commit 3c3ff68492c2d00bd8cb39ed2d02bdaf5caf5cb8 from qemu
2019-02-22 18:39:08 -05:00
Aaron Lindsay OS 5c153537f5
target/arm: Stop unintentional sign extension in pmu_init
This was introduced by
commit bf8d09694ccc07487cd73d7562081fdaec3370c8
target/arm: Don't clear supported PMU events when initializing PMCEID1
and identified by Coverity (CID 1398645).

Backports commit 67da43d668320e1bcb0a0195aaf2de4ff2a001a0 from qemu
2019-02-22 18:32:10 -05:00
Peter Maydell 928f226ed6
target/arm: v8M MPU should use background region as default, not always
The "background region" for a v8M MPU is a default which will be used
(if enabled, and if the access is privileged) if the access does
not match any specific MPU region. We were incorrectly using it
always (by putting the condition at the wrong nesting level). This
meant that we would always return the default background permissions
rather than the correct permissions for a specific region, and also
that we would not return the right information in response to a
TT instruction.

Move the check for the background region to the same place in the
logic as the equivalent v8M MPUCheck() pseudocode puts it.
This in turn means we must adjust the condition we use to detect
matches in multiple regions to avoid false-positives.

Backports commit cff21316c666c8053b1f425577e324038d0ca30d from qemu
2019-02-22 18:30:44 -05:00
Markus Armbruster 6279d604d3
qapi: Prepare for system modules other than 'builtin'
The next commit wants to generate qapi-emit-events.{c.h}. To enable
that, extend QAPISchemaModularCVisitor to support additional "system
modules", i.e. modules that don't correspond to a (user-defined) QAPI
schema module.

Backports commit c2e196a9b41235a308fb6d1c516aa91ba0a807c8 from qemu
2019-02-21 09:58:54 -05:00
Markus Armbruster 5d0966ce6b
qapi: Clean up modular built-in code generation a bit
We neglect to call .visit_module() for the special module we use for
built-ins. Harmless, but clean it up anyway. The
tests/qapi-schema/*.out now show the built-in module as 'module None'.

Subclasses of QAPISchemaModularCVisitor need to ._add_module() this
special module to enable code generation for built-ins. When this
hasn't been done, QAPISchemaModularCVisitor.visit_module() does
nothing for the special module. That looks like built-ins could
accidentally be generated into the wrong module when a subclass
neglects to call ._add_module(). Can't happen, because built-ins are
all visited before any other module. But that's non-obvious. Switch
off code generation explicitly.

Rename QAPISchemaModularCVisitor._begin_module() to
._begin_user_module().

New QAPISchemaModularCVisitor._is_builtin_module(), for clarity.

Backports commit dcac64711ea906e844ae60a5927e5580f7252c1e from qemu
2019-02-21 09:56:29 -05:00
Richard Henderson 5c34cab41c
target/arm: Add missing clear_tail calls
Fortunately, the functions affected are so far only called from SVE,
so there is no tail to be cleared. But as we convert more of AdvSIMD
to gvec, this will matter.

Backports commit d8efe78e8039511b95c23d75bb48eca6873fbb0f from qemu
2019-02-15 18:15:20 -05:00
Richard Henderson f3cb92c86c
target/arm: Use vector operations for saturation
For same-sign saturation, we have tcg vector operations. We can
compute the QC bit by comparing the saturated value against the
unsaturated value.

Backports commit 89e68b575e138d0af1435f11a8ffcd8779c237bd from qemu
2019-02-15 18:14:09 -05:00
Richard Henderson 10d468f601
target/arm: Split out FPSCR.QC to a vector field
Change the representation of this field such that it is easy
to set from vector code.

Backports commit a4d5846245c5e029e5aa3945a9bda1de1c3fedbf from qemu
2019-02-15 18:04:13 -05:00
Richard Henderson 356b70e931
target/arm: Fix set of bits kept in xregs[ARM_VFP_FPSCR]
Given that we mask bits properly on set, there is no reason
to mask them again on get. We failed to clear the exception
status bits, 0x9f, which means that the wrong value would be
returned on get. Except in the (probably normal) case in which
the set clears all of the bits.

Simplify the code in set to also clear the RES0 bits.

Backports commit 18aaa59c622208743565307668a2100ab24f7de9 from qemu
2019-02-15 18:00:57 -05:00
Richard Henderson ca4bb1b4bc
target/arm: Split out flags setting from vfp compares
Minimize the code within a macro by splitting out a helper function.
Use deposit32 instead of manual bit manipulation.

Backports commit 55a889456ef78f3f9b8eae9846c2f1453b1dd77b from qemu
2019-02-15 17:59:34 -05:00
Richard Henderson 4e44043956
target/arm: Fix arm_cpu_dump_state vs FPSCR
Backports commit ec527e4eeccc31e3beadf3b61b66c61bbd873811 from qemu
2019-02-15 17:58:25 -05:00
Richard Henderson ed7c9d0710
target/arm: Remove neon min/max helpers
These are now unused.

Backports commit a5c5dc53c4688efc149b235361d2d49869e77139 from qemu
2019-02-15 17:57:18 -05:00
Richard Henderson 198befc50e
target/arm: Use tcg integer min/max primitives for neon
The 32-bit PMIN/PMAX has been decomposed to scalars,
and so can be trivially expanded inline.

Backports commit 9ecd3c5c1651fa7f9adbedff4806a2da0b50490c from qemu
2019-02-15 17:55:11 -05:00
Richard Henderson eee33bd692
target/arm: Use vector minmax expanders for aarch32
Backports commit 6f2782218230bbb33fa22f9a2f73f8a570046007 from qemu
2019-02-15 17:54:05 -05:00
Richard Henderson 96d1df966b
target/arm: Use vector minmax expanders for aarch64
Backports commit 264d2a481a6c34dfda53be3fbea66116bcef9c5a from qemu
2019-02-15 17:52:36 -05:00
Richard Henderson d147946edc
target/arm: Rely on optimization within tcg_gen_gvec_or
Since we're now handling a == b generically, we no longer need
to do it by hand within target/arm/.

Backports commit 2900847ff4c862887af750935a875059615f509a from qemu
2019-02-15 17:50:28 -05:00
Alex Bennée bf9c8499ca
target/arm: expose remaining CPUID registers as RAZ
There are a whole bunch more registers in the CPUID space which are
currently not used but are exposed as RAZ. To avoid too much
duplication we expand ARMCPRegUserSpaceInfo to understand glob
patterns so we only need one entry to tweak whole ranges of registers.

Backports commit d040242effe47850060d2ef1c461ff637d88a84d from qemu
2019-02-15 17:48:37 -05:00
Alex Bennée 890983f186
target/arm: expose MPIDR_EL1 to userspace
As this is a single register we could expose it with a simple ifdef
but we use the existing modify_arm_cp_regs mechanism for consistency.

Backports commit 522641660c3de64ed8322b8636c58625cd564a3f from qemu
2019-02-15 17:29:23 -05:00
Alex Bennée babf31dfa0
target/arm: expose CPUID registers to userspace
A number of CPUID registers are exposed to userspace by modern Linux
kernels thanks to the "ARM64 CPU Feature Registers" ABI. For QEMU's
user-mode emulation we don't need to emulate the kernels trap but just
return the value the trap would have done. To avoid too much #ifdef
hackery we process ARMCPRegInfo with a new helper (modify_arm_cp_regs)
before defining the registers. The modify routine is driven by a
simple data structure which describes which bits are exported and
which are fixed.

Backports commit 6c5c0fec29bbfe36c64eca1edfd8455be46b77c6 from qemu
2019-02-15 17:27:30 -05:00
Alex Bennée 0a51e5055f
target/arm: relax permission checks for HWCAP_CPUID registers
Although technically not visible to userspace the kernel does make
them visible via a trap and emulate ABI. We provide a new permission
mask (PL0U_R) which maps to PL0_R for CONFIG_USER builds and adjust
the minimum permission check accordingly.

Backports commit b5bd7440422bb66deaceb812bb9287a6a3cdf10c from qemu
2019-02-15 17:18:06 -05:00
Catherine Ho 841ac2b3bb
target/arm: Fix int128_make128 lo, hi order in paired_cmpxchg64_be
The lo,hi order is different from the comments. And in commit
1ec182c33379 ("target/arm: Convert to HAVE_CMPXCHG128"), it changes
the original code logic. So just restore the old code logic before this
commit:
do_paired_cmpxchg64_be():
cmpv = int128_make128(env->exclusive_high, env->exclusive_val);
newv = int128_make128(new_hi, new_lo);

This fixes a bug that would only be visible for big-endian
AArch64 guest code.

Fixes: 1ec182c33379 ("target/arm: Convert to HAVE_CMPXCHG128")

Backports commit abd5abc58c5d4c9bd23427b0998a44eb87ed47a2 from qemu
2019-02-15 17:16:55 -05:00
Peter Maydell 31813bafe2
target/arm: Implement HACR_EL2
HACR_EL2 is a register with IMPDEF behaviour, which allows
implementation specific trapping to EL2. Implement it as RAZ/WI,
since QEMU's implementation has no extra traps. This also
matches what h/w implementations like Cortex-A53 and A57 do.

Backports commit 831a2fca343ebcd6651eab9102bd7a36b77da65d from qemu
2019-02-15 17:15:41 -05:00
Aaron Lindsay OS af17f7fa59
target/arm: Fix CRn to be 14 for PMEVTYPER/PMEVCNTR
This bug was introduced in:
commit 5ecdd3e47cadae83a62dc92b472f1fe163b56f59
target/arm: Finish implementation of PM[X]EVCNTR and PM[X]EVTYPER

Backports commit 62c7ec3488fe0dcbabffd543f458914e27736115 from qemu
2019-02-15 17:12:04 -05:00
Leon Alrae 6099733fc5
target/mips: reimplement SC instruction emulation and use cmpxchg
Completely rewrite conditional stores handling. Use cmpxchg.

This eliminates need for separate implementations of SC instruction
emulation for user and system emulation.

Backports commit 33a07fa2db66376e6ee780d4a8b064dc5118cf34 from qemu
2019-02-15 17:10:16 -05:00
Leon Alrae df67716ed5
target/mips: compare virtual addresses in LL/SC sequence
Do only virtual addresses comaprisons in LL/SC sequence emulations.

Until this patch, physical addresses had been compared in SC part of
LL/SC sequence, even though such comparisons could be avoided. Getting
rid of them allows throwing away SC helpers and having common SC
implementations in user and system mode, avoiding the need for two
separate implementations selected by #ifdef CONFIG_USER_ONLY.

Correct guest software should not rely on LL/SC if they accesses the
same physical address via different virtual addresses or if page
mapping gets changed between LL/SC due to manipulating TLB entries.
MIPS Instruction Set Manual clearly says that an RMW sequence must
use the same address in the LL and SC (virtual address, physical
address, cacheability and coherency attributes must be identical).
Otherwise, the result of the SC is not predictable. This patch takes
advantage of this fact and removes the virtual->physical address
translation from SC helper.

lladdr served as Coprocessor 0 LLAddr register which captures physical
address of the most recent LL instruction, and also lladdr was used
for comparison with following SC physical address. This patch changes
the meaning of lladdr - now it will only keep the virtual address of
the most recent LL. Additionally, CP0_LLAddr field is introduced which
is the actual Coperocessor 0 LLAddr register that guest can access.

Backports commit c7c7e1e9a5e3f0a8a1dbff6e4ccfd21c2dc9f845 from qemu
2019-02-15 16:59:40 -05:00
Emilio G. Cota f31764dd5b
cputlb: update TLB entry/index after tlb_fill
We are failing to take into account that tlb_fill() can cause a
TLB resize, which renders prior TLB entry pointers/indices stale.
Fix it by re-doing the TLB entry lookups immediately after tlb_fill.

Fixes: 86e1eff8bc ("tcg: introduce dynamic TLB sizing", 2019-01-28)

Backports commit 6d967cb86d5b4a60ba15b497126b621ce9ca6609 from qemu
2019-02-12 11:48:48 -05:00
Emilio G. Cota 1b44fd94ac
exec-all: document that tlb_fill can trigger a TLB resize
Backports commit ae56a2ff92ac73782279abf8857585c34b15f509 from qemu
2019-02-12 11:38:28 -05:00
Mark Cave-Ayland 576df55076
tcg/i386: fix unsigned vector saturating arithmetic
Due to a cut/paste error in the original implementation, the unsigned
vector saturating arithmetic was erroneously being calculated as signed
vector saturating arithmetic.

Fixes: 8ffafbcec2 ("tcg/i386: Implement vector saturating arithmetic")

Backports commit 3115584d39afe8cf2a84a40549029f53792abca5 from qemu
2019-02-12 11:37:12 -05:00
Richard Henderson f7c5f0ccbe
tcg: Diagnose referenced labels that have not been emitted
Currently, a jump to a label that is not defined anywhere will
be emitted not be relocated. This results in a jump to a random
jump target. With tcg debugging, print a diagnostic to the -d op
file and abort.

This could help debug or detect errors like
c2d9644e6d ("target/arm: Fix crash on conditional instruction in an IT block")

Backports commit bef16ab4e641636b4e85c3d863b4257ce0be4e6f from qemu
2019-02-12 11:35:11 -05:00
Catherine Ho 17477ac1ca
tcg: add early clober modifier in atomic16_cmpxchg on aarch64
Without this patch, gcc might up the Input/Output registers and
cause unpredictable error.

Fixes: 1ec182c33379 ("target/arm: Convert to HAVE_CMPXCHG128")

Backports commit 7400d6938c6d455c4eba2b80c06d60c8fa5c5ba3 from qemu
2019-02-07 08:58:53 -05:00
Robert Hoo c8a49d8593
Revert "i386: Add CPUID bit for PCONFIG"
This reverts commit 5131dc433df54b37e8e918d8fba7fe10344e7a7b.
For new instruction 'PCONFIG' will not be exposed to guest.

Backports commit 712f807e1965c8f1f1da5bbec2b92a8c540e6631 from qemu
2019-02-07 08:56:40 -05:00
Paolo Bonzini 4234209a64
i386: remove the 'INTEL_PT' CPUID bit from named CPU models
Processor tracing is not yet implemented for KVM and it will be an
opt in feature requiring a special module parameter.
Disable it, because it is wrong to enable it by default and
it is impossible that no one has ever used it.

Backports commit 4c257911dcc7c4189768e9651755c849ce9db4e8 from qemu
2019-02-07 08:55:32 -05:00
Robert Hoo 2c61060ecb
i386: remove the new CPUID 'PCONFIG' from Icelake-Server CPU model
PCONFIG is not available to guests; it must be specifically enabled
using the PCONFIG_ENABLE execution control. Disable it, because
no one can ever use it.

Backports commit 76e5a4d58357b9d077afccf7f7c82e17f733b722 from qemu
2019-02-07 08:54:13 -05:00
Peter Maydell 04676ed074
target/arm: Make FPSCR/FPCR trapped-exception bits RAZ/WI
The {IOE, DZE, OFE, UFE, IXE, IDE} bits in the FPSCR/FPCR are for
enabling trapped IEEE floating point exceptions (where IEEE exception
conditions cause a CPU exception rather than updating the FPSR status
bits). QEMU doesn't implement this (and nor does the hardware we're
modelling), but for implementations which don't implement trapped
exception handling these control bits are supposed to be RAZ/WI.
This allows guest code to test for whether the feature is present
by trying to write to the bit and checking whether it sticks.

QEMU is incorrectly making these bits read as written. Make them
RAZ/WI as the architecture requires.

In particular this was causing problems for the NetBSD automatic
test suite.

Backports commit a15945d98d3a3390c3da344d1b47218e91e49d8b from qemu
2019-02-05 17:45:22 -05:00
Richard Henderson 9b0e04f3ab
target/arm: Enable TBI for user-only
This has been enabled in the linux kernel since v3.11
(commit d50240a5f6cea, 2013-09-03,
"arm64: mm: permit use of tagged pointers at EL0").

Backports commit f6a148fef63698826e69ca91cc11877ab1ed786f from qemu
2019-02-05 17:44:17 -05:00
Peter Maydell 8124b9f975
target/arm: Compute TB_FLAGS for TBI for user-only
Enables, but does not turn on, TBI for CONFIG_USER_ONLY.

Backports commit c47eaf9fc2af68cfbdbd9ae31f8e2e5ebb7022b4 from qemu
2019-02-05 17:43:11 -05:00
Richard Henderson b928902908
target/arm: Clean TBI for data operations in the translator
This will allow TBI to be used in user-only mode, as well as
avoid ping-ponging the softmmu TLB when TBI is in use. It
will also enable other armv8 extensions.

Backports commit 3a471103ac1823bafc907962dcaf6bd4fc0942a2 from qemu
2019-02-05 17:39:12 -05:00
Richard Henderson 5c6ffde710
target/arm: Add TBFLAG_A64_TBID, split out gen_top_byte_ignore
Split out gen_top_byte_ignore in preparation of handling these
data accesses; the new tbflags field is not yet honored.

Backports commit 4a9ee99db38ba513bf1e8f43665b79c60accd017 from qemu
2019-02-05 17:20:11 -05:00
Richard Henderson fbd8992e27
target/arm: Enable BTI for -cpu max
Backports commit a15daafa1cba96ff28abdfb6c860e0939655dbd1 from qemu
2019-02-05 17:15:32 -05:00
Richard Henderson 4dc5f80683
target/arm: Set btype for indirect branches
Backports commit 001d47b6efbe4795ed77366986b8ef384ab8b127 from qemu
2019-02-05 17:14:16 -05:00
Richard Henderson 11736a659b
target/arm: Reset btype for direct branches
This is all of the non-exception cases of DISAS_NORETURN.

Backports commit 358622703583d2e2967e0a93da990e747dcc3ac6 from qemu
2019-02-05 17:11:59 -05:00
Richard Henderson 88193cf7c3
target/arm: Default handling of BTYPE during translation
The branch target exception for guarded pages has high priority,
and only 8 instructions are valid for that case. Perform this
check before doing any other decode.

Clear BTYPE after all insns that neither set BTYPE nor exit via
exception (DISAS_NORETURN).

Not yet handled are insns that exit via DISAS_NORETURN for some
other reason, like direct branches.

Backports commit 51bf0d7aa91a9d4e2563240a42e6cb705cef84aa from qemu
2019-02-05 17:05:31 -05:00
Richard Henderson d594b2047f
target/arm: Cache the GP bit for a page in MemTxAttrs
Caching the bit means that we will not have to re-walk the
page tables to look up the bit during translation.

Backports commit 1bafc2ba7e6bfe89fff3503fdac8db39c973de48 from qemu
2019-02-05 17:02:19 -05:00
Richard Henderson 9c2a5963d0
exec: Add target-specific tlb bits to MemTxAttrs
These bits can be used to cache target-specific data in cputlb
read from the page tables.

Backports commit d3765835ed02f91f0c6cbb452874209a6af4a730 from qemu
2019-02-05 17:00:56 -05:00
Richard Henderson cf3ac035bc
target/arm: Add BT and BTYPE to tb->flags
Backports commit 08f1434a71ddf2bdfdb034dcd24b24464d1efd72 from qemu
2019-02-05 16:59:53 -05:00
Richard Henderson a99119ce39
target/arm: Add PSTATE.BTYPE
Place this in its own field within ENV, as that will
make it easier to reset from within TCG generated code.

With the change to pstate_read/write, exception entry
and return are automatically handled.

Backports commit f6e52eaac13b6947f4406c127e3090c898e439c9 from qemu
2019-02-05 16:57:51 -05:00
Richard Henderson 6b4f7a28b5
target/arm: Introduce isar_feature_aa64_bti
Also create field definitions for id_aa64pfr1 from ARMv8.5.

Backports commit be53b6f4d7ace2e6a018e45af825069ccb7bab66 from qemu
2019-02-05 16:56:01 -05:00
Murilo Opsfelder Araujo 0010078e4b
mmap-alloc: fix hugetlbfs misaligned length in ppc64
The commit 7197fb4058bcb68986bae2bb2c04d6370f3e7218 ("util/mmap-alloc:
fix hugetlb support on ppc64") fixed Huge TLB mappings on ppc64.

However, we still need to consider the underlying huge page size
during munmap() because it requires that both address and length be a
multiple of the underlying huge page size for Huge TLB mappings.
Quote from "Huge page (Huge TLB) mappings" paragraph under NOTES
section of the munmap(2) manual:

"For munmap(), addr and length must both be a multiple of the
underlying huge page size."

On ppc64, the munmap() in qemu_ram_munmap() does not work for Huge TLB
mappings because the mapped segment can be aligned with the underlying
huge page size, not aligned with the native system page size, as
returned by getpagesize().

This has the side effect of not releasing huge pages back to the pool
after a hugetlbfs file-backed memory device is hot-unplugged.

This patch fixes the situation in qemu_ram_mmap() and
qemu_ram_munmap() by considering the underlying page size on ppc64.

After this patch, memory hot-unplug releases huge pages back to the
pool.

Fixes: 7197fb4058bcb68986bae2bb2c04d6370f3e7218

Backports commit 53adb9d43e1abba187387a51f238e878e934c647 from qemu
2019-02-05 16:52:39 -05:00
Murilo Opsfelder Araujo 22e3feb162
mmap-alloc: unfold qemu_ram_mmap()
Unfold parts of qemu_ram_mmap() for the sake of understanding, moving
declarations to the top, and keeping architecture-specifics in the
ifdef-else blocks. No changes in the function behaviour.

Give ptr and ptr1 meaningful names:
ptr -> guardptr : pointer to the PROT_NONE guard region
ptr1 -> ptr : pointer to the mapped memory returned to caller

Backports commit 2044c3e7116eeac0449dcb4a4130cc8f8b9310da from qemu
2019-02-05 16:49:47 -05:00
Remi Denis-Courmont 0b7f1ff086
target/arm: fix decoding of B{,L}RA{A,B}
A flawed test lead to the instructions always being treated as
unallocated encodings.

Fixes: https://bugs.launchpad.net/bugs/1813460

Backports commit 1cf86a8618644beb860951ff4383457ee88a7f4a from qemu
2019-02-03 17:55:31 -05:00
Remi Denis-Courmont a20bb60f06
target/arm: fix AArch64 virtual address space size
Since QEMU does not support the ARMv8.2-LVA, Large Virtual Address,
extension (yet), the VA address space is 48-bits plus a sign bit. User
mode can only handle the positive half of the address space, so that
makes a limit of 48 bits.

(With LVA, it would be 53 and 52 bits respectively.)

The incorrectly large address space conflicts with PAuth instructions,
which use bits 48-54 and 56-63 for the pointer authentication code. This
also conflicts with (as yet unsupported by QEMU) data tagging and with
the ARMv8.5-MTE extension.

Backports commit f6768aa1b4c6a80448eabd22bb9b4123c709caea from qemu
2019-02-03 17:55:30 -05:00
Richard Henderson 932c4e8569
target/arm: Always enable pac keys for user-only
Drop the pac properties. This approach cannot work as written
because the properties are applied before arm_cpu_reset, which
zeros SCTLR_EL1 (amongst everything else).

We can re-introduce the properties if they turn out to be useful.
But since linux 5.0 enables all of the keys, they may not be.

Backports commit 276c6e813719568bdc9743e87ff8f42115006206 from qemu
2019-02-03 17:55:30 -05:00
Julia Suvorova 93acc4dc56
arm: Clarify the logic of set_pc()
Until now, the set_pc logic was unclear, which raised questions about
whether it should be used directly, applying a value to PC or adding
additional checks, for example, set the Thumb bit in Arm cpu. Let's set
the set_pc logic for “Configure the PC, as was done in the ELF file”
and implement synchronize_with_tb hook for preserving PC to cpu_tb_exec.

Backports commit 42f6ed919325413392bea247a1e6f135deb469cd from qemu
2019-02-03 17:55:30 -05:00
Richard Henderson 50cf5634da
target/arm: Enable API, APK bits in SCR, HCR
These bits become writable with the ARMv8.3-PAuth extension.

Backports commit ef682cdb4aded5c65a018e175482e875de66059d from qemu
2019-02-03 17:55:30 -05:00
Aaron Lindsay OS 0dd5bf84fc
target/arm: Send interrupts on PMU counter overflow
Whenever we notice that a counter overflow has occurred, send an
interrupt. This is made more reliable with the addition of a timer in a
follow-on commit.

Backports commit f4efb4b2a17528837cb445f9bdfaef8df4a5acf7 from qemu
2019-02-03 17:55:30 -05:00
Peter Maydell edfb13f8eb
target/arm/translate-a64: Fix mishandling of size in FCMLA decode
In disas_simd_indexed(), for the case of "complex fp", each indexable
element is a complex pair, so the total size is twice that indicated
in the 'size' field in the encoding. We were trying to do this
"double the size" operation with a left shift by 1, but this is
incorrect because the 'size' field is a MO_8/MO_16/MO_32/MO_64
value, and doubling the size should be done by a simple increment.

This meant we were mishandling FCMLA (by element) of values where
the real and imaginary parts are 32-bit floats, and would incorrectly
UNDEF this encoding. (No other insns take this code path, and for
16-bit floats it happens that 1 << 1 and 1 + 1 are both the same).

Backports commit eaefb97a8b97dbf42c016fe65b68b92f99a346f6 from qemu
2019-02-03 17:55:30 -05:00
Peter Maydell f999e06c22
target/arm/translate-a64: Fix FCMLA decoding error
The FCMLA (by element) instruction exists in the
"vector x indexed element" encoding group, but not in
the "scalar x indexed element" group. Correctly UNDEF
the unallocated encodings.

Backports commit 4dfabb6d568e6b315594d7d464dacaf3368aff60 from qemu
2019-02-03 17:55:30 -05:00
Peter Maydell eaecbe7901
target/arm/translate-a64: Don't underdecode SDOT and UDOT
In the AdvSIMD scalar x indexed element and vector x indexed element
encoding group, the SDOT and UDOT instructions are vector only,
and their opcode is unallocated in the scalar group. Correctly
UNDEF this unallocated encoding.

Backports commit 4977986ca38fb1d5357532e1a8032b984047a369 from qemu
2019-02-03 17:55:30 -05:00
Peter Maydell f7d78d9e08
target/arm/translate-a64: Don't underdecode FP insns
In the encoding groups
* floating-point data-processing (1 source)
* floating-point data-processing (2 source)
* floating-point data-processing (3 source)
* floating-point immediate
* floating-point compare
* floating-ponit conditional compare
* floating-point conditional select

bit 31 is M and bit 29 is S (and bit 30 is 0, already checked at
this point in the decode). None of these groups allocate any
encoding for M=1 or S=1. We checked this in disas_fp_compare(),
disas_fp_ccomp() and disas_fp_csel(), but missed it in disas_fp_1src(),
disas_fp_2src(), disas_fp_3src() and disas_fp_imm().

We also missed that in the fp immediate encoding the imm5 field
must be all zeroes.

Correctly UNDEF the unallocated encodings here.

Backports commit c1e20801f5ee53472dbf2757df605543f3f4ce0b from qemu
2019-02-03 17:55:29 -05:00
Peter Maydell 1128b4d77d
target/arm/translate-a64: Don't underdecode add/sub extended register
In the "add/subtract (extended register)" encoding group, the "opt"
field in bits [23:22] must be zero. Correctly UNDEF the unallocated
encodings where this field is not zero.

Backports commit 4f61106614410945b1d1c93081544ad5b13044fc from qemu
2019-02-03 17:55:29 -05:00
Peter Maydell decebb5936
target/arm/translate-a64: Don't underdecode SIMD ld/st single
In the AdvSIMD load/store single structure encodings, the
non-post-indexed case should have zeroes in [20:16] (which is the
Rm field for the post-indexed case). Bit 31 must also be zero
(a check we got right in ldst_multiple but not here). Correctly
UNDEF these unallocated encodings.

Backports commit 9c72b68ad746a51f63822cffab4d144b5957823a from qemu
2019-02-03 17:55:29 -05:00
Peter Maydell 60ccaf56ac
target/arm/translate-a64: Don't underdecode SIMD ld/st multiple
In the AdvSIMD load/store multiple structures encodings,
the non-post-indexed case should have zeroes in [20:16]
(which is the Rm field for the post-indexed case).
Correctly UNDEF the currently unallocated encodings which
have non-zeroes in those bits.

Backports commit e1f220811dbd5d85fb02ff286358f9ee6188938f from qemu
2019-02-03 17:55:29 -05:00
Peter Maydell 80248fecb6
target/arm/translate-a64: Don't underdecode PRFM
The PRFM prefetch insn in the load/store with imm9 encodings
requires idx field 0b00; we were underdecoding this by
only checking !is_unpriv (which is equivalent to idx != 2).
Correctly UNDEF the unallocated encodings where idx == 0b01
and 0b11 as well as 0b10.

Backports commit a80c4256543987ca88407349ee012a673a10a2ae from qemu
2019-02-03 17:55:29 -05:00
Peter Maydell 147269ed81
target/arm/translate-a64: Don't underdecode system instructions
The "system instructions" and "system register move" subcategories
of "branches, exception generating and system instructions" for A64
only apply if bits [23:22] are zero; other values are currently
unallocated. Correctly UNDEF these unallocated encodings.

Backports commit 08d5e3bde6b4ad32996bf69d93aa66ae43d3f3ff from qemu
2019-02-03 17:55:29 -05:00
Thomas Huth a0489c8849
target/m68k: Fix LGPL information in the file headers
It's either "GNU *Library* General Public License version 2" or
"GNU Lesser General Public License version *2.1*", but there was
no "version 2.0" of the "Lesser" license. So assume that version
2.1 is meant here.
Also some files mention the GPL instead of the LGPL after declaring
that the files are licensed under the LGPL, so change these spots to
use LGPL, too.

Backports commit d749fb85bd35f2f175a4ed3d170561e4f54f7297 from qemu
2019-02-03 17:55:29 -05:00
Thomas Huth 85bc48fecd
tcg: Fix LGPL version number
It's either "GNU *Library* General Public version 2" or "GNU Lesser
General Public version *2.1*", but there was no "version 2.0" of the
"Lesser" library. So assume that version 2.1 is meant here.

Backports commit fb0343d5b4dd4b9b9e96e563d913a3e0c709fe4e from qemu
2019-02-03 17:55:28 -05:00
Thomas Huth aa9e5f9abe
Don't talk about the LGPL if the file is licensed under the GPL
Some files claim that the code is licensed under the GPL, but then
suddenly suggest that the user should have a look at the LGPL.
That's of course non-sense, replace it with the correct GPL wording
instead.

Backports commit e361a772ffcd33675ffdd4637eea98a460dfed1b from qemu
2019-02-03 17:55:28 -05:00
Vitaly Kuznetsov d13b35769d
i386: Enable NPT and NRIPSAVE for AMD CPUs
Modern AMD CPUs support NPT and NRIPSAVE features and KVM exposes these
when present. NRIPSAVE apeared somewhere in Opteron_G3 lifetime (e.g.
QuadCore AMD Opteron 2378 has is but QuadCore AMD Opteron HE 2344 doesn't),
NPT was introduced a bit earlier.

Add the FEAT_SVM leaf to Opteron_G4/G5 and EPYC/EPYC-IBPB cpu models.

Backports commit 9fe8b7be17eaac4cfde4083000cc96747d7cf4f8 from qemu
2019-02-03 17:55:28 -05:00
Tao Xu 72afbf6d48
i386: Update stepping of Cascadelake-Server
Update the stepping from 5 to 6, in order that
the Cascadelake-Server CPU model can support AVX512VNNI
and MSR based features exposed by ARCH_CAPABILITIES.

Backports commit b0a1980384fc265d91de7e09aa5fe531a69e6288 from qemu
2019-02-03 17:55:28 -05:00