feat(gicv5): add support for building with gicv5

The Generic Interrupt Controller v5 (GICv5) is the next generation of
Arm interrupt controllers. It is a clean slate design and has native
support fo

feat(gicv5): add support for building with gicv5

The Generic Interrupt Controller v5 (GICv5) is the next generation of
Arm interrupt controllers. It is a clean slate design and has native
support for the latest Armv9 features. As such it is entirely backwards
incompatible with GICv3/v4.

This patch adds the necessary boilerplate to select a build with GICv5.
The GIC has always had two parts. BL31 deals directly with the CPU
interface while platform code is responsible for managing the IRI. In v5
this split is formalised and the CPU interface, FEAT_GCIE, may be
implemented on its own. So reflect this split in our code with
ENABLE_FEAT_GCIE which only affects BL31 and the GICv5 IRI lies in the
generic GIC driver.

No actual functionality yet.

Change-Id: I97a0c3ba708877c213e50e7ef148e3412aa2af90
Co-developed-by: Achin Gupta <achin.gupta@arm.com>
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>

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Merge "fix(build): remove SUPPORT_STACK_MEMTAG" into integration

fix(build): remove SUPPORT_STACK_MEMTAG

This flag enables the memtag sanitizer in clang. However, for this to
work, other generic and platform-specific logic is required that was
never implemented.

fix(build): remove SUPPORT_STACK_MEMTAG

This flag enables the memtag sanitizer in clang. However, for this to
work, other generic and platform-specific logic is required that was
never implemented. So in effect, the feature is half-baked and at best a
simple test (of which we have plenty in tftf) or a NOP at worst.

So remove the option to simplify code a little.

Change-Id: Iab4150871c89545d813c5ae14be67bf6459d051a
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>

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Merge "feat(cpufeat): add support for FEAT_PAUTH_LR" into integration

feat(cpufeat): add support for FEAT_PAUTH_LR

This patch enables FEAT_PAUTH_LR at EL3 on systems that support it when
the new ENABLE_FEAT_PAUTH_LR flag is set.

Currently, PAUTH_LR is only supported

feat(cpufeat): add support for FEAT_PAUTH_LR

This patch enables FEAT_PAUTH_LR at EL3 on systems that support it when
the new ENABLE_FEAT_PAUTH_LR flag is set.

Currently, PAUTH_LR is only supported by arm clang compiler and not GCC.

Change-Id: I7db1e34b661ed95cad75850b62878ac5d98466ea
Signed-off-by: John Powell <john.powell@arm.com>

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Merge "feat(rmmd): add FEAT_MEC support" into integration

feat(rmmd): add FEAT_MEC support

This patch provides architectural support for further use of
Memory Encryption Contexts (MEC) by declaring the necessary
registers, bits, masks, helpers and values a

feat(rmmd): add FEAT_MEC support

This patch provides architectural support for further use of
Memory Encryption Contexts (MEC) by declaring the necessary
registers, bits, masks, helpers and values and modifying the
necessary registers to enable FEAT_MEC.

Signed-off-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
Signed-off-by: Juan Pablo Conde <juanpablo.conde@arm.com>
Change-Id: I670dbfcef46e131dcbf3a0b927467ebf6f438fa4

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Merge changes I3d950e72,Id315a8fe,Ib62e6e9b,I1d0475b2 into integration

* changes:
perf(cm): drop ZCR_EL3 saving and some ISBs and replace them with root context
perf(psci): get PMF timestamps wi

Merge changes I3d950e72,Id315a8fe,Ib62e6e9b,I1d0475b2 into integration

* changes:
perf(cm): drop ZCR_EL3 saving and some ISBs and replace them with root context
perf(psci): get PMF timestamps with no cache flushes if possible
perf(amu): greatly simplify AMU context management
perf(mpmm): greatly simplify MPMM enablement

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perf(amu): greatly simplify AMU context management

The current code is incredibly resilient to updates to the spec and
has worked quite well so far. However, recent implementations expose a
weakness

perf(amu): greatly simplify AMU context management

The current code is incredibly resilient to updates to the spec and
has worked quite well so far. However, recent implementations expose a
weakness in that this is rather slow. A large part of it is written in
assembly, making it opaque to the compiler for optimisations. The
future proofness requires reading registers that are effectively
`volatile`, making it even harder for the compiler, as well as adding
lots of implicit barriers, making it hard for the microarchitecutre to
optimise as well.

We can make a few assumptions, checked by a few well placed asserts, and
remove a lot of this burden. For a start, at the moment there are 4
group 0 counters with static assignments. Contexting them is a trivial
affair that doesn't need a loop. Similarly, there can only be up to 16
group 1 counters. Contexting them is a bit harder, but we can do with a
single branch with a falling through switch. If/when both of these
change, we have a pair of asserts and the feature detection mechanism to
guard us against pretending that we support something we don't.

We can drop contexting of the offset registers. They are fully
accessible by EL2 and as such are its responsibility to preserve on
powerdown.

Another small thing we can do, is pass the core_pos into the hook.
The caller already knows which core we're running on, we don't need to
call this non-trivial function again.

Finally, knowing this, we don't really need the auxiliary AMUs to be
described by the device tree. Linux doesn't care at the moment, and any
information we need for EL3 can be neatly placed in a simple array.

All of this, combined with lifting the actual saving out of assembly,
reduces the instructions to save the context from 180 to 40, including a
lot fewer branches. The code is also much shorter and easier to read.

Also propagate to aarch32 so that the two don't diverge too much.

Change-Id: Ib62e6e9ba5be7fb9fb8965c8eee148d5598a5361
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>

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Merge "feat(mops): enable FEAT_MOPS in EL3 when INIT_UNUSED_NS_EL2=1" into integration

feat(mops): enable FEAT_MOPS in EL3 when INIT_UNUSED_NS_EL2=1

FEAT_MOPS, mandatory from Arm v8.8, is typically managed in EL2.
However, in configurations where NS_EL2 is not enabled,
EL3 must set th

feat(mops): enable FEAT_MOPS in EL3 when INIT_UNUSED_NS_EL2=1

FEAT_MOPS, mandatory from Arm v8.8, is typically managed in EL2.
However, in configurations where NS_EL2 is not enabled,
EL3 must set the HCRX_EL2.MSCEn bit to 1 to enable the feature.

This patch ensures FEAT_MOPS is enabled by setting HCRX_EL2.MSCEn to 1.

Change-Id: Ic4960e0cc14a44279156b79ded50de475b3b21c5
Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>

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Merge "feat(fpmr): disable FPMR trap" into integration

feat(fpmr): disable FPMR trap

This patch enables support of FEAT_FPMR by enabling access
to FPMR register. It achieves it by setting the EnFPM bit of
SCR_EL3. This feature is currently enabled for N

feat(fpmr): disable FPMR trap

This patch enables support of FEAT_FPMR by enabling access
to FPMR register. It achieves it by setting the EnFPM bit of
SCR_EL3. This feature is currently enabled for NS world only.

Reference:
https://developer.arm.com/documentation/109697/2024_09/
Feature-descriptions/The-Armv9-5-architecture-extension?lang=en

Change-Id: I580c409b9b22f8ead0737502280fb9093a3d5dd2
Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>

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Merge "fix(build): correct feature assignment for ARM v8.8 compliance" into integration

fix(build): correct feature assignment for ARM v8.8 compliance

Correct feature list assignment to apply ARM v8.7 features
to `armv8-8-a-feats` instead of `armv8-7-a-feats` for ARM v8.8
compliance.
T

fix(build): correct feature assignment for ARM v8.8 compliance

Correct feature list assignment to apply ARM v8.7 features
to `armv8-8-a-feats` instead of `armv8-7-a-feats` for ARM v8.8
compliance.
This was highlighted during the build of TC4 with ARM_ARCH_MAJOR=8
and ARM_ARCH_MINOR=8.

Change-Id: I6c48a3ffa2f1e18d5e4a6484a823c9112dddd751
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>

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Merge "feat(cpufeat): add ENABLE_FEAT_LS64_ACCDATA" into integration

feat(cpufeat): add ENABLE_FEAT_LS64_ACCDATA

Armv8.6 introduced the FEAT_LS64 extension, which provides a 64 *byte*
store instruction. A related instruction is ST64BV0, which will replace
the lowest

feat(cpufeat): add ENABLE_FEAT_LS64_ACCDATA

Armv8.6 introduced the FEAT_LS64 extension, which provides a 64 *byte*
store instruction. A related instruction is ST64BV0, which will replace
the lowest 32 bits of the data with a value taken from the ACCDATA_EL1
system register (so that EL0 cannot alter them).
Using that ST64BV0 instruction and accessing the ACCDATA_EL1 system
register is guarded by two SCR_EL3 bits, which we should set to avoid a
trap into EL3, when lower ELs use one of those.

Add the required bits and pieces to make this feature usable:
- Add the ENABLE_FEAT_LS64_ACCDATA build option (defaulting to 0).
- Add the CPUID and SCR_EL3 bit definitions associated with FEAT_LS64.
- Add a feature check to check for the existing four variants of the
LS64 feature and detect future extensions.
- Add code to save and restore the ACCDATA_EL1 register on
secure/non-secure context switches.
- Enable the feature with runtime detection for FVP and Arm FPGA.

Please note that the *basic* FEAT_LS64 feature does not feature any trap
bits, it's only the addition of the ACCDATA_EL1 system register that
adds these traps and the SCR_EL3 bits.

Change-Id: Ie3e2ca2d9c4fbbd45c0cc6089accbb825579138a
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

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Merge "feat(d128): add support for FEAT_D128" into integration

Merge "fix(mte): remove deprecated CTX_INCLUDE_MTE_REGS/FEAT_MTE" into integration

feat(d128): add support for FEAT_D128

This patch disables trapping to EL3 when the FEAT_D128
specific registers are accessed by setting the SCR_EL3.D128En bit.

If FEAT_D128 is implemented, then FEA

feat(d128): add support for FEAT_D128

This patch disables trapping to EL3 when the FEAT_D128
specific registers are accessed by setting the SCR_EL3.D128En bit.

If FEAT_D128 is implemented, then FEAT_SYSREG128 is implemented.
With FEAT_SYSREG128 certain system registers are treated as 128-bit,
so we should be context saving and restoring 128-bits instead of 64-bit
when FEAT_D128 is enabled.

FEAT_SYSREG128 adds support for MRRS and MSRR instruction which
helps us to read write to 128-bit system register.
Refer to Arm Architecture Manual for further details.

Change the FVP platform to default to handling this as a dynamic option
so the right decision can be made by the code at runtime.

Change-Id: I1a53db5eac29e56c8fbdcd4961ede3abfcb2411a
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>

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fix(mte): remove deprecated CTX_INCLUDE_MTE_REGS/FEAT_MTE

Remove all instances of macros CTX_INCLUDE_MTE_REGS and FEAT_MTE
since these have been deprecated in v2.11

Change-Id: I7838a865755326f03668

fix(mte): remove deprecated CTX_INCLUDE_MTE_REGS/FEAT_MTE

Remove all instances of macros CTX_INCLUDE_MTE_REGS and FEAT_MTE
since these have been deprecated in v2.11

Change-Id: I7838a865755326f03668e43768140929a2d9e418
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>

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Merge "feat(sctlr2): add support for FEAT_SCTLR2" into integration

Merge "feat(the): add support for FEAT_THE" into integration

feat(sctlr2): add support for FEAT_SCTLR2

Arm v8.9 introduces FEAT_SCTLR2, adding SCTLR2_ELx registers.
Support this, context switching the registers and disabling
traps so lower ELs can access the

feat(sctlr2): add support for FEAT_SCTLR2

Arm v8.9 introduces FEAT_SCTLR2, adding SCTLR2_ELx registers.
Support this, context switching the registers and disabling
traps so lower ELs can access the new registers.

Change the FVP platform to default to handling this as a dynamic option
so the right decision can be made by the code at runtime.

Change-Id: I0c4cba86917b6b065a7e8dd6af7daf64ee18dcda
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>

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feat(the): add support for FEAT_THE

Arm v8.9 introduces FEAT_THE, adding Translation Hardening Extension
Read-Check-Write mask registers, RCWMASK_EL1 and RCWSMASK_EL1.
Support this, context switchin

feat(the): add support for FEAT_THE

Arm v8.9 introduces FEAT_THE, adding Translation Hardening Extension
Read-Check-Write mask registers, RCWMASK_EL1 and RCWSMASK_EL1.
Support this, context switching the registers and disabling
traps so lower ELs can access the new registers.

Change the FVP platform to default to handling this as a dynamic option
so the right decision can be made by the code at runtime.

Change-Id: I8775787f523639b39faf61d046ef482f73b2a562
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>

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