This both advertises that we support four counters and enables them
because the pmu_num_counters() reads this value from PMCR.
Backports commit ac689a2e5155d129acaa39603e2a7a29abd90d89 from qemu
The instruction event is only enabled when icount is used, cycles are
always supported. Always defining get_cycle_count (but altering its
behavior depending on CONFIG_USER_ONLY) allows us to remove some
CONFIG_USER_ONLY #defines throughout the rest of the code.
Backports commit b2e2372511946fae86fbb8709edec7a41c6f3167 from qemu
Add arrays to hold the registers, the definitions themselves, access
functions, and logic to reset counters when PMCR.P is set. Update
filtering code to support counters other than PMCCNTR. Support migration
with raw read/write functions.
Backports commit 5ecdd3e47cadae83a62dc92b472f1fe163b56f59 from qemu
This commit doesn't add any supported events, but provides the framework
for adding them. We store the pm_event structs in a simple array, and
provide the mapping from the event numbers to array indexes in the
supported_event_map array. Because the value of PMCEID[01] depends upon
which events are supported at runtime, generate it dynamically.
Backports commit 57a4a11b2b281bb548b419ca81bfafb214e4c77a from qemu
This is immediately necessary for the PMUv3 implementation to check
ID_DFR0.PerfMon to enable/disable specific features, but defines the
full complement of fields for possible future use elsewhere.
Backports commit beceb99c0c1218d0b55cc04ce6ef77579d3416cb from qemu
Rename arm_ccnt_enabled to pmu_counter_enabled, and add logic to only
return 'true' if the specified counter is enabled and neither prohibited
or filtered.
Backports commit 033614c47de78409ad3fb39bb7bd1483b71c6789 from qemu
Because of the PMU's design, many register accesses have side effects
which are inter-related, meaning that the normal method of saving CP
registers can result in inconsistent state. These side-effects are
largely handled in pmu_op_start/finish functions which can be called
before and after the state is saved/restored. By doing this and adding
raw read/write functions for the affected registers, we avoid
migration-related inconsistencies.
Backports relevant parts of commit
980ebe87053792a5bdefaa87777c40914fd4f673 from qemu
pmccntr_read and pmccntr_write contained duplicate code that was already
being handled by pmccntr_sync. Consolidate the duplicated code into two
functions: pmccntr_op_start and pmccntr_op_finish. Add a companion to
c15_ccnt in CPUARMState so that we can simultaneously save both the
architectural register value and the last underlying cycle count - this
ensures time isn't lost and will also allow us to access the 'old'
architectural register value in order to detect overflows in later
patches.
Backports commit 5d05b9d462666ed21b7fef61aa45dec9aaa9f0ff from qemu
Add 4 attributes that controls the EL1 enable bits, as we may not
always want to turn on pointer authentication with -cpu max.
However, by default they are enabled.
Backports relevant parts of commit
1ae9cfbd470bffb8d9bacd761344e9b5e8adecb6 from qemu.
This is the main crypto routine, an implementation of QARMA.
This matches, as much as possible, ARM pseudocode.
Backports commit 990870b205ddfdba3fd3c1321e6083005ef59d1a from qemu
This is not really functional yet, because the crypto is not yet
implemented. This, however follows the AddPAC pseudo function.
Backports commit 63ff0ca94cb84764d2aee45b37c5502a54811dab from qemu
This is not really functional yet, because the crypto is not yet
implemented. This, however follows the Auth pseudo function.
Backports commit a7bfa086c973a51fc18116c9d2e22a0e0069edba from qemu
Stripping out the authentication data does not require any crypto,
it merely requires the virtual address parameters.
Backports commit 04d13549fa10bb9775a90701e4e6fd0a2cbf83cb from qemu
The arm_regime_tbi{0,1} functions are replacable with the new function
by giving the lowest and highest address.
Backports commit 5d8634f5a3a8474525edcfd581a659830e9e97c0 from qemu
Use TBID in aa64_va_parameters depending on the data parameter.
This automatically updates all existing users of the function.
Backports commit 8220af7e4d34c858898fbfe55943aeea8f4e875f from qemu
We need to reuse this from helper-a64.c. Provide a stub
definition for CONFIG_USER_ONLY. This matches the stub
definitions that we removed for arm_regime_tbi{0,1} before.
Backports commit bf0be433878935e824479e8ae890493e1fb646ed from qemu
We will shortly want to talk about TBI as it relates to data.
Passing around a pair of variables is less convenient than a
single variable.
Backports commit 476a4692f06e381117fb7ad0d04d37c9c2612198 from qemu
Split out functions to extract the virtual address parameters.
Let the functions choose T0 or T1 address space half, if present.
Extract (most of) the control bits that vary between EL or Tx.
Backports commit ba97be9f4a4ecaf16a1454dc669e5f3d935d3b63 from qemu
While we could expose stage_1_mmu_idx, the combination is
probably going to be more useful.
Backports commit 64be86ab1b5ef10b660a4230ee7f27c0da499043 from qemu
The pattern
ARMMMUIdx mmu_idx = core_to_arm_mmu_idx(env, cpu_mmu_index(env, false));
is computing the full ARMMMUIdx, stripping off the ARM bits,
and then putting them back.
Avoid the extra two steps with the appropriate helper function.
Backports commit 50494a279dab22a015aba9501a94fcc3cd52140e from qemu
Not that there are any stores involved, but why argue with ARM's
naming convention.
Backports commit bd889f4810839a2b68e339696ccf7c406cd62879 from qemu
Now properly signals unallocated for REV64 with SF=0.
Allows for the opcode2 field to be decoded shortly.
Backports commit 18de2813c35e359621a24a0a2a77570e83cb73b9 from qemu
The cryptographic internals are stubbed out for now,
but the enable and trap bits are checked.
Backports commit 0d43e1a2d29a05f7b0d5629caaff18733cbdf3bb from qemu
There are 5 bits of state that could be added, but to save
space within tbflags, add only a single enable bit.
Helpers will determine the rest of the state at runtime.
Backports commit 0816ef1bfcd3ac53e7454b62ca436727887f6056 from qemu
In U-boot, we switch from S-SVC -> Mon -> Hyp mode when we want to
enter Hyp mode. The change into Hyp mode is done by doing an
exception return from Mon. This doesn't work with current QEMU.
The problem is that in bad_mode_switch() we refuse to allow
the change of mode.
Note that bad_mode_switch() is used to do validation for two situations:
(1) changes to mode by instructions writing to CPSR.M
(ie not exception take/return) -- this corresponds to the
Armv8 Arm ARM pseudocode Arch32.WriteModeByInstr
(2) changes to mode by exception return
Attempting to enter or leave Hyp mode via case (1) is forbidden in
v8 and UNPREDICTABLE in v7, and QEMU is correct to disallow it
there. However, we're already doing that check at the top of the
bad_mode_switch() function, so if that passes then we should allow
the case (2) exception return mode changes to switch into Hyp mode.
We want to test whether we're trying to return to the nonexistent
"secure Hyp" mode, so we need to look at arm_is_secure_below_el3()
rather than arm_is_secure(), since the latter is always true if
we're in Mon (EL3).
Backports commit 2d2a4549cc29850aab891495685a7b31f5254b12 from qemu
Some functionality is dependent on the Python version
detected/configured on configure. While it's possible to run the
Python version later and check for the version, doing it once is
preferable. Also, it's a relevant information to keep in build logs,
as the overall behavior of the build can be affected by it.
Backports commit 755ee70ff758584b8b6190b2cab4b480402af201 from qemu
GCC 8 introduced the -Wstringop-truncation checker to detect truncation by
the strncat and strncpy functions (closely related to -Wstringop-overflow,
which detect buffer overflow by string-modifying functions declared in
<string.h>).
In tandem of -Wstringop-truncation, the "nonstring" attribute was added:
The nonstring variable attribute specifies that an object or member
declaration with type array of char, signed char, or unsigned char,
or pointer to such a type is intended to store character arrays that
do not necessarily contain a terminating NUL. This is useful in detecting
uses of such arrays or pointers with functions that expect NUL-terminated
strings, and to avoid warnings when such an array or pointer is used as
an argument to a bounded string manipulation function such as strncpy.
From the GCC manual: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-nonstring-variable-attribute
Add the QEMU_NONSTRING macro which checks if the compiler supports this
attribute.
Backports commit 1daff2f8193496b0e5e0ab56dc48c570c81f804e from qemu
Hyper-V .feat_names are, unlike hardware features, commented out and it is
not obvious why we do that. Document the current status quo.
Backports commit abd5fc4c862d033a989552914149f01c9476bb16 from qemu
It was found that QMP users of QEMU (e.g. libvirt) may need
HV_CPUID_ENLIGHTMENT_INFO.EAX/HV_CPUID_NESTED_FEATURES.EAX information. In
particular, 'hv_tlbflush' and 'hv_evmcs' enlightenments are only exposed in
HV_CPUID_ENLIGHTMENT_INFO.EAX.
HV_CPUID_NESTED_FEATURES.EAX is exposed for two reasons: convenience
(we don't need to export it from hyperv_handle_properties() and as
future-proof for Enlightened MSR-Bitmap, PV EPT invalidation and
direct virtual flush features.
Backports commit a2b107dbbd342ff2077aa5af705efaf68c375459 from qemu
