fix(cpus): workaround for Cortex-A715 erratum 3711916

Cortex-A715 erratum 3711916 is a Cat B erratum that applies to
revisions r0p0, r1p0, r1p1, r1p2 and r1p3, and is still open.

SDEN documentation

fix(cpus): workaround for Cortex-A715 erratum 3711916

Cortex-A715 erratum 3711916 is a Cat B erratum that applies to
revisions r0p0, r1p0, r1p1, r1p2 and r1p3, and is still open.

SDEN documentation:
https://developer.arm.com/documentation/SDEN-2148827

Change-Id: Iad149a2c02a804b3f4f0f2f5b89e866675cb4093
Signed-off-by: John Powell <john.powell@arm.com>

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fix(cpus): workaround for Cortex-A715 erratum 2376701

Cortex-A715 erratum 2376701 is a Cat B erratum that applies to
revisions r0p0 and r1p0, and is fixed in r1p1.

This workaround is not expected t

fix(cpus): workaround for Cortex-A715 erratum 2376701

Cortex-A715 erratum 2376701 is a Cat B erratum that applies to
revisions r0p0 and r1p0, and is fixed in r1p1.

This workaround is not expected to have a significant performance
impact.

SDEN documentation:
https://developer.arm.com/documentation/SDEN-2148827

Change-Id: Idcd2a07d269d55534dc5faa59c454d37426f2cfa
Signed-off-by: John Powell <john.powell@arm.com>

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fix(cpus): workaround for Cortex-A715 erratum 2409570

Cortex-A715 erratum 2409570 is a Cat B erratum that applies to
revisions r0p0 and r1p0, and is fixed in r1p1.

This workaround could have a sign

fix(cpus): workaround for Cortex-A715 erratum 2409570

Cortex-A715 erratum 2409570 is a Cat B erratum that applies to
revisions r0p0 and r1p0, and is fixed in r1p1.

This workaround could have a significant performance impact for
software that relies heavily on using store-release instructions.

This workaround only applies to r1p0, r0p0 has a different
workaround but is not used in production hardware so has not been
implemented.

SDEN documentation:
https://developer.arm.com/documentation/SDEN-2148827

Change-Id: Id9429831525b842779d7b7e60f103c93be4acd67
Signed-off-by: John Powell <john.powell@arm.com>

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feat(cpus): add support for Neoverse-N2 prefetcher

To get accurate and repeatable L2 cache performance metrics,
the L2 region prefetcher must be disabled. This prevents
speculative fetches from inte

feat(cpus): add support for Neoverse-N2 prefetcher

To get accurate and repeatable L2 cache performance metrics,
the L2 region prefetcher must be disabled. This prevents
speculative fetches from interfering with the measurements.

This patch adds a build-time option, NEOVERSE_N2_PREFETCHER_DISABLE,
to set the PF_DIS bit (bit 15) in the CPUECTLR_EL1 register for this
purpose.

Change-Id: Ie7ab9e84bb29d042d0bb2ec697e0c1e39ad5032e
Signed-off-by: Rohit Ner <rohitner@google.com>

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Merge "feat(cpus): enable Maximum Power Mitigation Mechanism" into integration

Merge "feat(cpus): add support for venom cpu" into integration

feat(cpus): enable Maximum Power Mitigation Mechanism

Add Maximum Power Mitigation Mechanism(MPMM) for Veymont and Caddo
CPUs.

Change-Id: I4beedd9b95e0fe4069d9cfbf8c0211ccbcaf7f90
Signed-off-by: Go

feat(cpus): enable Maximum Power Mitigation Mechanism

Add Maximum Power Mitigation Mechanism(MPMM) for Veymont and Caddo
CPUs.

Change-Id: I4beedd9b95e0fe4069d9cfbf8c0211ccbcaf7f90
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>

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fix(security): add clrbhb support

TF-A mitigates spectre-bhb(CVE-2022-23960) issue with loop
workaround based on - https://developer.arm.com/documentation/110280/latest/

On platforms that support `

fix(security): add clrbhb support

TF-A mitigates spectre-bhb(CVE-2022-23960) issue with loop
workaround based on - https://developer.arm.com/documentation/110280/latest/

On platforms that support `clrbhb` instruction it is recommended to
use `clrbhb` instruction instead of the loop workaround.

Ref- https://developer.arm.com/documentation/102898/0108/

Change-Id: Ie6e56e96378503456a1617d5e5d51bc64c2e0f0b
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>

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fix(security): remove CVE_2022_23960 Cortex-X4

Cortex-X4 has ECBHB implemented and is protected against X-Context
attacks.

Ref: https://developer.arm.com/documentation/110280/latest/
TRM: https://d

fix(security): remove CVE_2022_23960 Cortex-X4

Cortex-X4 has ECBHB implemented and is protected against X-Context
attacks.

Ref: https://developer.arm.com/documentation/110280/latest/
TRM: https://developer.arm.com/documentation/102484/0003/The-Cortex-X4--core/Supported-standards-and-specifications?lang=en

Remove WORKAROUND_CVE_2022_23960 for Cortex-X4 to avoid accidental
enabling of this workaround and using loop workaround.

This was accidentally added with
commit@8c87becbc64f2e233ac905aa006d5e15a63a9a8b

Change-Id: I23f5fa748377a920340b3c5a6584ccfadeea901a
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>

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fix(security): remove CVE_2022_23960 Neoverse V3

Neoverse V3 has ECBHB implemented and is protected against X-Context
attacks.

Ref: https://developer.arm.com/documentation/110280/latest/
TRM: https

fix(security): remove CVE_2022_23960 Neoverse V3

Neoverse V3 has ECBHB implemented and is protected against X-Context
attacks.

Ref: https://developer.arm.com/documentation/110280/latest/
TRM: https://developer.arm.com/documentation/107734/0002/The-Neoverse--V3--core/Supported-standards-and-specifications?lang=en

Remove WORKAROUND_CVE_2022_23960 to avoid accidental enabling of this
workaround and using loop workaround.

This was accidentally added with
commit@c2a15217c3053117f4d39233002cb1830fa96670

Change-Id: I13b27c04c3da5ec80fa79422b4ef4fee64738caa
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>

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fix(security): remove CVE_2022_23960 Cortex-A720

Cortex-A720 has ECBHB implemented and is protected against X-Context
attacks.

Ref: https://developer.arm.com/documentation/110280/latest/
TRM: https

fix(security): remove CVE_2022_23960 Cortex-A720

Cortex-A720 has ECBHB implemented and is protected against X-Context
attacks.

Ref: https://developer.arm.com/documentation/110280/latest/
TRM: https://developer.arm.com/documentation/102530/0002/The-Cortex-A720--core/Supported-standards-and-specifications?lang=en

Remove WORKAROUND_CVE_2022_23960 for Cortex-A720 to avoid accidental
enabling of this workaround and using loop workaround.

This was accidentally added with
commit@c2a15217c3053117f4d39233002cb1830fa96670

Change-Id: I3c68b5f5d85ede37a6a039369de8ed2aa9205395
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>

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feat(cpus): add support for venom cpu

Add basic CPU library code to support Venom CPU

Change-Id: I84d4cb77b175812811a17e55b4b290585e05d216
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>

Merge "feat(cpus): add support for Dionysus cpu library" into integration

fix(build): set ERRATA_SPECULATIVE_AT after platform.mk

This was introduced in
289737419: fix(build): align the cpu-ops flags with all others

That patch reduced cpu-ops.mk to an elaborate defaults.

fix(build): set ERRATA_SPECULATIVE_AT after platform.mk

This was introduced in
289737419: fix(build): align the cpu-ops flags with all others

That patch reduced cpu-ops.mk to an elaborate defaults.mk and moved it
before platform.mk was evaluated. However, that patch missed the
ERRATA_SPECULATIVE_AT setting which must happen after platform.mk,
otherwise its value will not reflect errata state. So put it in the main
Makefile with other similar flag settings after platform.mk.

Change-Id: I221dab39c417531c5a148886d3e29709ba8b51a8
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>

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feat(cpus): add support for Dionysus cpu library

Add basic CPU library code to support the Dionysus CPU.

Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
Change-Id: I4e6b3c7e7369b7cbf0

feat(cpus): add support for Dionysus cpu library

Add basic CPU library code to support the Dionysus CPU.

Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
Change-Id: I4e6b3c7e7369b7cbf0e18d295e5ef5352f621e44

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fix(build): align the cpu-ops flags with all others

Since the cpu-ops file was created we've obtained the constraints.mk and
cflags.mk files and we also have the defaults.mk. The cpu-ops file is
not

fix(build): align the cpu-ops flags with all others

Since the cpu-ops file was created we've obtained the constraints.mk and
cflags.mk files and we also have the defaults.mk. The cpu-ops file is
not much different to these three, just much more complex. This patch
keeps the complicated bit in cpu-ops.mk but it makes it behave like
defaults.mk. The non-complicated bits (like cross referencing and
compiler flags) go to their corresponding files. This centralises
responsibilities and makes it nicer to keep track of.

The reason for doing this untangling is that the order of defaulting,
cross referencing, and compiler flag selection is significant and we can
run into problems where seemingly identical lines of code produce
different outcomes.

Change-Id: Id4b7714e432a0d628d33412836fd5c93f0488970
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>

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Merge changes from topic "gr/cpu_lib" into integration

* changes:
feat(cpus): add support for caddo cpu
feat(cpus): add support for veymont cpu

Merge changes Id711e387,I531a2ee1,Ic5b48514,I81f5f663,I6c529c13, ... into integration

* changes:
refactor(romlib): absorb WRAPPER_FLAGS into LDFLAGS
fix(build): simplify the -target options
fe

Merge changes Id711e387,I531a2ee1,Ic5b48514,I81f5f663,I6c529c13, ... into integration

* changes:
refactor(romlib): absorb WRAPPER_FLAGS into LDFLAGS
fix(build): simplify the -target options
feat(build): allow full LTO builds with clang
refactor(build): make sorting of sections generic
feat(build): use clang as a linker
fix(build): correctly detect that an option is missing with ld_option
feat(build): pass cflags to the linker when LTO is enabled

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Merge changes from topic "gr/spectre_bhb_updates" into integration

* changes:
fix(security): fix Neoverse V2 CVE-2022-23960
fix(security): fix Cortex-X3 CVE-2022-23960
fix(security): fix Corte

Merge changes from topic "gr/spectre_bhb_updates" into integration

* changes:
fix(security): fix Neoverse V2 CVE-2022-23960
fix(security): fix Cortex-X3 CVE-2022-23960
fix(security): fix Cortex-A715 CVE-2022-23960
fix(security): fix spectre bhb loop count for Cortex-A720

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feat(cpus): add support for caddo cpu

Add basic CPU library code to support Caddo CPU

Change-Id: I4b431771ebe6f23eb02f3301ff656cfcd4956f81
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>

feat(cpus): add support for veymont cpu

Add basic CPU library code to support Veymont CPU

Change-Id: I44db5650e7c9cf8fcc368c935574f4702c373dae
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>

feat(build): use clang as a linker

To support LTO, the gcc binary is used as a compiler, assembler, and
linker. Do the same for clang and enable LTO builds with it as a side
effect.

This simplifies

feat(build): use clang as a linker

To support LTO, the gcc binary is used as a compiler, assembler, and
linker. Do the same for clang and enable LTO builds with it as a side
effect.

This simplifies code quite a bit as the gcc/clang different is much
smaller. Support for ld/lld (if overriden with LD) is maintained.

This is a good time to convert tabs to spaces to conform to make's
expectations on syntax.

Change-Id: I6c529c1393f7e9e8046ed537f871fc3ad91d599a
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>

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feat(build): pass cflags to the linker when LTO is enabled

Usually, both compiling and linking happen by calling the top level
gcc/clang binary. Also, both compilers quite specifically tell us to
pa

feat(build): pass cflags to the linker when LTO is enabled

Usually, both compiling and linking happen by calling the top level
gcc/clang binary. Also, both compilers quite specifically tell us to
pass the same flags to the compilation and linking stages when we enable
LTO. This is crucial for things like the undefined behaviour sanitiser.
Anecdotally, in working on this, there have been a fair few errors that
the compiler has only been able to catch due to warning flags being
passed to the linker and building with LTO.

This patch puts the contents of TF_CFLAGS into TF_LDFLAGS when LTO is
enabled. This is easier said than done, however, as we support building
with clang and linking with gcc (or vice versa), so CFLAGS that are
discovered for one will not work for the other. This patch works around
this by splitting all flags into a per-compiler variable. Then CFLAGS
and LDFLAGS get the contents of the correct one.

Some notable side effects: CPPFLAGS and TF_CFLAGS_$(ARCH) become empty
and are removed, although expanding them is kept as platforms set them.
Some flags become duplicate and are removed form TF_LDFLAGS (eg -O1).

The errata (--fix) flags are kept as-is but moved to cpu-ops.mk for
consistency. This is because they currently don't work with LTO and will
be addressed in a later patch.

Finally, ERROR_DEPRECATED's flags are also identical on all compilers so
don't maintain a difference.

Change-Id: I3630729ee5f474c09d4722cd0ede6845e1725d95
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>

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refactor: fix workaround order for Cortex-A720

One of the Cortex-A720 errata was below the CVE workaround, this
moves it up to the correct place.

Change-Id: I6770567a9580973ceedb5911f0a495391ef9e83

refactor: fix workaround order for Cortex-A720

One of the Cortex-A720 errata was below the CVE workaround, this
moves it up to the correct place.

Change-Id: I6770567a9580973ceedb5911f0a495391ef9e839
Signed-off-by: John Powell <john.powell@arm.com>

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fix(cpus): workaround for Cortex-A720 erratum 2729604

Cortex-A720 erratum 2729604 is a Cat B erratum that applies to
revisions r0p0 and r0p1, and is fixed in r0p2.

This workaround might impact perf

fix(cpus): workaround for Cortex-A720 erratum 2729604

Cortex-A720 erratum 2729604 is a Cat B erratum that applies to
revisions r0p0 and r0p1, and is fixed in r0p2.

This workaround might impact performance of workloads heavily
relying on floating point division or square root operations.

SDEN documentation:
https://developer.arm.com/documentation/SDEN-2439421

Change-Id: I4567d75ba9f17146d0d7bc5cdb622bb63efadc3c
Signed-off-by: John Powell <john.powell@arm.com>

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