Commit Graph

86 Commits

Author SHA1 Message Date
Rob Herring 2b1dc0666e arm64: Rename ARM64_WORKAROUND_2966298
commit 546b7cde9b1dd36089649101b75266564600ffe5 upstream.

In preparation to apply ARM64_WORKAROUND_2966298 for multiple errata,
rename the kconfig and capability. No functional change.

Cc: stable@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20240110-arm-errata-a510-v1-1-d02bc51aeeee@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-01-31 16:17:01 -08:00
Rob Herring 6e3ae2927b arm64: errata: Add Cortex-A520 speculative unprivileged load workaround
commit 471470bc70 upstream.

Implement the workaround for ARM Cortex-A520 erratum 2966298. On an
affected Cortex-A520 core, a speculatively executed unprivileged load
might leak data from a privileged load via a cache side channel. The
issue only exists for loads within a translation regime with the same
translation (e.g. same ASID and VMID). Therefore, the issue only affects
the return to EL0.

The workaround is to execute a TLBI before returning to EL0 after all
loads of privileged data. A non-shareable TLBI to any address is
sufficient.

The workaround isn't necessary if page table isolation (KPTI) is
enabled, but for simplicity it will be. Page table isolation should
normally be disabled for Cortex-A520 as it supports the CSV3 feature
and the E0PD feature (used when KASLR is enabled).

Cc: stable@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230921194156.1050055-2-robh@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-10-10 22:00:39 +02:00
Kristina Martsenko b0fe378674 arm64: cpufeature: Fix CLRBHB and BC detection
commit 479965a2b7 upstream.

ClearBHB support is indicated by the CLRBHB field in ID_AA64ISAR2_EL1.
Following some refactoring the kernel incorrectly checks the BC field
instead. Fix the detection to use the right field.

(Note: The original ClearBHB support had it as FTR_HIGHER_SAFE, but this
patch uses FTR_LOWER_SAFE, which seems more correct.)

Also fix the detection of BC (hinted conditional branches) to use
FTR_LOWER_SAFE, so that it is not reported on mismatched systems.

Fixes: 356137e68a ("arm64/sysreg: Make BHB clear feature defines match the architecture")
Fixes: 8fcc8285c0 ("arm64/sysreg: Convert ID_AA64ISAR2_EL1 to automatic generation")
Cc: stable@vger.kernel.org
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230912133429.2606875-1-kristina.martsenko@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-10-10 22:00:37 +02:00
Oliver Upton cde7f2fd63 arm64: errata: Mitigate Ampere1 erratum AC03_CPU_38 at stage-2
[ Upstream commit 6df696cd9b ]

AmpereOne has an erratum in its implementation of FEAT_HAFDBS that
required disabling the feature on the design. This was done by reporting
the feature as not implemented in the ID register, although the
corresponding control bits were not actually RES0. This does not align
well with the requirements of the architecture, which mandates these
bits be RES0 if HAFDBS isn't implemented.

The kernel's use of stage-1 is unaffected, as the HA and HD bits are
only set if HAFDBS is detected in the ID register. KVM, on the other
hand, relies on the RES0 behavior at stage-2 to use the same value for
VTCR_EL2 on any cpu in the system. Mitigate the non-RES0 behavior by
leaving VTCR_EL2.HA clear on affected systems.

Cc: stable@vger.kernel.org
Cc: D Scott Phillips <scott@os.amperecomputing.com>
Cc: Darren Hart <darren@os.amperecomputing.com>
Acked-by: D Scott Phillips <scott@os.amperecomputing.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20230609220104.1836988-2-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-08-03 10:23:54 +02:00
Mark Brown e1567b4f0e arm64/sysreg: Fix typo in SCTR_EL1.SPINTMASK
SPINTMASK was typoed as SPINMASK, fix it.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20221005181642.711734-1-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-10-07 14:30:11 +01:00
Catalin Marinas c704cf27a1 Merge branch 'for-next/alternatives' into for-next/core
* for-next/alternatives:
  : Alternatives (code patching) improvements
  arm64: fix the build with binutils 2.27
  arm64: avoid BUILD_BUG_ON() in alternative-macros
  arm64: alternatives: add shared NOP callback
  arm64: alternatives: add alternative_has_feature_*()
  arm64: alternatives: have callbacks take a cap
  arm64: alternatives: make alt_region const
  arm64: alternatives: hoist print out of __apply_alternatives()
  arm64: alternatives: proton-pack: prepare for cap changes
  arm64: alternatives: kvm: prepare for cap changes
  arm64: cpufeature: make cpus_have_cap() noinstr-safe
2022-09-30 09:18:22 +01:00
Catalin Marinas b23ec74cbd Merge branches 'for-next/doc', 'for-next/sve', 'for-next/sysreg', 'for-next/gettimeofday', 'for-next/stacktrace', 'for-next/atomics', 'for-next/el1-exceptions', 'for-next/a510-erratum-2658417', 'for-next/defconfig', 'for-next/tpidr2_el0' and 'for-next/ftrace', remote-tracking branch 'arm64/for-next/perf' into for-next/core
* arm64/for-next/perf:
  arm64: asm/perf_regs.h: Avoid C++-style comment in UAPI header
  arm64/sve: Add Perf extensions documentation
  perf: arm64: Add SVE vector granule register to user regs
  MAINTAINERS: add maintainers for Alibaba' T-Head PMU driver
  drivers/perf: add DDR Sub-System Driveway PMU driver for Yitian 710 SoC
  docs: perf: Add description for Alibaba's T-Head PMU driver

* for-next/doc:
  : Documentation/arm64 updates
  arm64/sve: Document our actual ABI for clearing registers on syscall

* for-next/sve:
  : SVE updates
  arm64/sysreg: Add hwcap for SVE EBF16

* for-next/sysreg: (35 commits)
  : arm64 system registers generation (more conversions)
  arm64/sysreg: Fix a few missed conversions
  arm64/sysreg: Convert ID_AA64AFRn_EL1 to automatic generation
  arm64/sysreg: Convert ID_AA64DFR1_EL1 to automatic generation
  arm64/sysreg: Convert ID_AA64FDR0_EL1 to automatic generation
  arm64/sysreg: Use feature numbering for PMU and SPE revisions
  arm64/sysreg: Add _EL1 into ID_AA64DFR0_EL1 definition names
  arm64/sysreg: Align field names in ID_AA64DFR0_EL1 with architecture
  arm64/sysreg: Add defintion for ALLINT
  arm64/sysreg: Convert SCXTNUM_EL1 to automatic generation
  arm64/sysreg: Convert TIPDR_EL1 to automatic generation
  arm64/sysreg: Convert ID_AA64PFR1_EL1 to automatic generation
  arm64/sysreg: Convert ID_AA64PFR0_EL1 to automatic generation
  arm64/sysreg: Convert ID_AA64MMFR2_EL1 to automatic generation
  arm64/sysreg: Convert ID_AA64MMFR1_EL1 to automatic generation
  arm64/sysreg: Convert ID_AA64MMFR0_EL1 to automatic generation
  arm64/sysreg: Convert HCRX_EL2 to automatic generation
  arm64/sysreg: Standardise naming of ID_AA64PFR1_EL1 SME enumeration
  arm64/sysreg: Standardise naming of ID_AA64PFR1_EL1 BTI enumeration
  arm64/sysreg: Standardise naming of ID_AA64PFR1_EL1 fractional version fields
  arm64/sysreg: Standardise naming for MTE feature enumeration
  ...

* for-next/gettimeofday:
  : Use self-synchronising counter access in gettimeofday() (if FEAT_ECV)
  arm64: vdso: use SYS_CNTVCTSS_EL0 for gettimeofday
  arm64: alternative: patch alternatives in the vDSO
  arm64: module: move find_section to header

* for-next/stacktrace:
  : arm64 stacktrace cleanups and improvements
  arm64: stacktrace: track hyp stacks in unwinder's address space
  arm64: stacktrace: track all stack boundaries explicitly
  arm64: stacktrace: remove stack type from fp translator
  arm64: stacktrace: rework stack boundary discovery
  arm64: stacktrace: add stackinfo_on_stack() helper
  arm64: stacktrace: move SDEI stack helpers to stacktrace code
  arm64: stacktrace: rename unwind_next_common() -> unwind_next_frame_record()
  arm64: stacktrace: simplify unwind_next_common()
  arm64: stacktrace: fix kerneldoc comments

* for-next/atomics:
  : arm64 atomics improvements
  arm64: atomic: always inline the assembly
  arm64: atomics: remove LL/SC trampolines

* for-next/el1-exceptions:
  : Improve the reporting of EL1 exceptions
  arm64: rework BTI exception handling
  arm64: rework FPAC exception handling
  arm64: consistently pass ESR_ELx to die()
  arm64: die(): pass 'err' as long
  arm64: report EL1 UNDEFs better

* for-next/a510-erratum-2658417:
  : Cortex-A510: 2658417: remove BF16 support due to incorrect result
  arm64: errata: remove BF16 HWCAP due to incorrect result on Cortex-A510
  arm64: cpufeature: Expose get_arm64_ftr_reg() outside cpufeature.c
  arm64: cpufeature: Force HWCAP to be based on the sysreg visible to user-space

* for-next/defconfig:
  : arm64 defconfig updates
  arm64: defconfig: Add Coresight as module
  arm64: Enable docker support in defconfig
  arm64: defconfig: Enable memory hotplug and hotremove config
  arm64: configs: Enable all PMUs provided by Arm

* for-next/tpidr2_el0:
  : arm64 ptrace() support for TPIDR2_EL0
  kselftest/arm64: Add coverage of TPIDR2_EL0 ptrace interface
  arm64/ptrace: Support access to TPIDR2_EL0
  arm64/ptrace: Document extension of NT_ARM_TLS to cover TPIDR2_EL0
  kselftest/arm64: Add test coverage for NT_ARM_TLS

* for-next/ftrace:
  : arm64 ftraces updates/fixes
  arm64: ftrace: fix module PLTs with mcount
  arm64: module: Remove unused plt_entry_is_initialized()
  arm64: module: Make plt_equals_entry() static
2022-09-30 09:17:57 +01:00
Mark Rutland 4c0bd995d7 arm64: alternatives: have callbacks take a cap
Today, callback alternatives are special-cased within
__apply_alternatives(), and are applied alongside patching for system
capabilities as ARM64_NCAPS is not part of the boot_capabilities feature
mask.

This special-casing is less than ideal. Giving special meaning to
ARM64_NCAPS for this requires some structures and loops to use
ARM64_NCAPS + 1 (AKA ARM64_NPATCHABLE), while others use ARM64_NCAPS.
It's also not immediately clear callback alternatives are only applied
when applying alternatives for system-wide features.

To make this a bit clearer, changes the way that callback alternatives
are identified to remove the special-casing of ARM64_NCAPS, and to allow
callback alternatives to be associated with a cpucap as with all other
alternatives.

New cpucaps, ARM64_ALWAYS_BOOT and ARM64_ALWAYS_SYSTEM are added which
are always detected alongside boot cpu capabilities and system
capabilities respectively. All existing callback alternatives are made
to use ARM64_ALWAYS_SYSTEM, and so will be patched at the same point
during the boot flow as before.

Subsequent patches will make more use of these new cpucaps.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Joey Gouly <joey.gouly@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20220912162210.3626215-7-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-16 17:15:03 +01:00
James Morse 1bdb0fbb2e arm64: errata: remove BF16 HWCAP due to incorrect result on Cortex-A510
Cortex-A510's erratum #2658417 causes two BF16 instructions to return the
wrong result in rare circumstances when a pair of A510 CPUs are using
shared neon hardware.

The two instructions affected are BFMMLA and VMMLA, support for these is
indicated by the BF16 HWCAP. Remove it on affected platforms.

Signed-off-by: James Morse <james.morse@arm.com>
Link: https://lore.kernel.org/r/20220909165938.3931307-4-james.morse@arm.com
[catalin.marinas@arm.com: add revision to the Kconfig help; remove .type]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-16 15:23:50 +01:00
Mark Brown 10453bf149 arm64/sysreg: Convert ID_AA64AFRn_EL1 to automatic generation
Convert ID_AA64AFRn_EL1 to automatic generation as per DDI0487I.a, no
functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220910163354.860255-7-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-16 12:38:58 +01:00
Mark Brown c65c617806 arm64/sysreg: Convert ID_AA64DFR1_EL1 to automatic generation
Convert ID_AA64FDR1_EL1 to automatic generation as per DDI0487I.a, no
functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220910163354.860255-6-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-16 12:38:58 +01:00
Mark Brown e62a2d2610 arm64/sysreg: Convert ID_AA64FDR0_EL1 to automatic generation
Convert ID_AA64DFR0_EL1 to automatic generation as per DDI0487I.a, no
functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220910163354.860255-5-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-16 12:38:58 +01:00
Mark Brown 3e9ae1ce50 arm64/sysreg: Add defintion for ALLINT
The FEAT_NMI extension adds a new system register ALLINT for controlling
NMI related interrupt masking, add a definition of this register as per
DDI0487H.a.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20220905225425.1871461-29-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-09 10:59:07 +01:00
Mark Brown b1179b75e9 arm64/sysreg: Convert SCXTNUM_EL1 to automatic generation
Convert SCXTNUM_EL1 to automatic generation as per DDI0487H.a, no
functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20220905225425.1871461-28-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-09 10:59:06 +01:00
Mark Brown 0a45f3980d arm64/sysreg: Convert TIPDR_EL1 to automatic generation
Convert TPIDR_EL1 to automatic generation as per DDI0487H.a, no functional
changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20220905225425.1871461-27-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-09 10:59:06 +01:00
Mark Brown ef4ba5a635 arm64/sysreg: Convert ID_AA64PFR1_EL1 to automatic generation
Convert ID_AA64PFR1_EL1 to be automatically generated as per DDI04187H.a,
no functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20220905225425.1871461-26-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-09 10:59:06 +01:00
Mark Brown cea08f2bf4 arm64/sysreg: Convert ID_AA64PFR0_EL1 to automatic generation
Automatically generate the constants for ID_AA64PFR0_EL1 as per DDI0487I.a,
no functional changes. The generic defines for the ELx fields are left in
place as they remain useful.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20220905225425.1871461-25-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-09 10:59:06 +01:00
Mark Brown cfa3a6c55b arm64/sysreg: Convert ID_AA64MMFR2_EL1 to automatic generation
Convert ID_AA64MMFR2_EL1 defines to automatic generation as per DDI0487H.a,
no functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20220905225425.1871461-24-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-09 10:59:05 +01:00
Kristina Martsenko 7d751b313d arm64/sysreg: Convert ID_AA64MMFR1_EL1 to automatic generation
Convert ID_AA64MMFR1_EL1 to be automatically generated as per DDI0487H.a
plus ECBHB which was RES0 in DDI0487H.a but has been subsequently
defined and is already present in mainline. No functional changes.

Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20220905225425.1871461-23-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-09 10:59:05 +01:00
Mark Brown 0b7ed4d8f5 arm64/sysreg: Convert ID_AA64MMFR0_EL1 to automatic generation
Automatically generate most of the defines for ID_AA64MMFR0_EL1 mostly as
per DDI0487H.a. Due to the large amount of MixedCase in this register which
isn't really consistent with either the kernel style or the majority of the
architecture the use of upper case is preserved. We also leave in place a
number of min/max/default value definitions which don't flow from the
architecture definitions.

No functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20220905225425.1871461-22-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-09 10:59:05 +01:00
Mark Brown cfaa32108a arm64/sysreg: Convert HCRX_EL2 to automatic generation
Convert HCRX_EL2 to be automatically generated as per DDI04187H.a, n
functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20220905225425.1871461-21-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-09 10:59:05 +01:00
Mark Brown 4c8b18af25 arm64/sysreg: Describe ID_AA64SMFR0_EL1.SMEVer as an enumeration
As with the corresponding SVE field ID_AA64ZFR0_EL1.SVEVer and other ID
register fields the SMEVer field should be identified as an enumeration
but it is currently described as a plain field (most likely due to there
presently being only one possible value). Update it to be an enumeration
as one would expect. No functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20220905225425.1871461-3-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-09-09 10:59:02 +01:00
Ionela Voinescu e89d120c4b arm64: errata: add detection for AMEVCNTR01 incrementing incorrectly
The AMU counter AMEVCNTR01 (constant counter) should increment at the same
rate as the system counter. On affected Cortex-A510 cores, AMEVCNTR01
increments incorrectly giving a significantly higher output value. This
results in inaccurate task scheduler utilization tracking and incorrect
feedback on CPU frequency.

Work around this problem by returning 0 when reading the affected counter
in key locations that results in disabling all users of this counter from
using it either for frequency invariance or as FFH reference counter. This
effect is the same to firmware disabling affected counters.

Details on how the two features are affected by this erratum:

 - AMU counters will not be used for frequency invariance for affected
   CPUs and CPUs in the same cpufreq policy. AMUs can still be used for
   frequency invariance for unaffected CPUs in the system. Although
   unlikely, if no alternative method can be found to support frequency
   invariance for affected CPUs (cpufreq based or solution based on
   platform counters) frequency invariance will be disabled. Please check
   the chapter on frequency invariance at
   Documentation/scheduler/sched-capacity.rst for details of its effect.

 - Given that FFH can be used to fetch either the core or constant counter
   values, restrictions are lifted regarding any of these counters
   returning a valid (!0) value. Therefore FFH is considered supported
   if there is a least one CPU that support AMUs, independent of any
   counters being disabled or affected by this erratum. Clarifying
   comments are now added to the cpc_ffh_supported(), cpu_read_constcnt()
   and cpu_read_corecnt() functions.

The above is achieved through adding a new erratum: ARM64_ERRATUM_2457168.

Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: James Morse <james.morse@arm.com>
Link: https://lore.kernel.org/r/20220819103050.24211-1-ionela.voinescu@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
2022-08-23 11:06:48 +01:00
Will Deacon 92867739e3 Merge branch 'for-next/cpufeature' into for-next/core
* for-next/cpufeature:
  arm64/hwcap: Support FEAT_EBF16
  arm64/cpufeature: Store elf_hwcaps as a bitmap rather than unsigned long
  arm64/hwcap: Document allocation of upper bits of AT_HWCAP
  arm64: trap implementation defined functionality in userspace
2022-07-25 10:58:10 +01:00
Will Deacon 618ff55eec Merge branch 'for-next/sysregs' into for-next/core
* for-next/sysregs: (28 commits)
  arm64/sysreg: Convert ID_AA64ZFR0_EL1 to automatic generation
  arm64/sysreg: Convert ID_AA64SMFR0_EL1 to automatic generation
  arm64/sysreg: Convert LORID_EL1 to automatic generation
  arm64/sysreg: Convert LORC_EL1 to automatic generation
  arm64/sysreg: Convert LORN_EL1 to automatic generation
  arm64/sysreg: Convert LOREA_EL1 to automatic generation
  arm64/sysreg: Convert LORSA_EL1 to automatic generation
  arm64/sysreg: Convert ID_AA64ISAR2_EL1 to automatic generation
  arm64/sysreg: Convert ID_AA64ISAR1_EL1 to automatic generation
  arm64/sysreg: Convert GMID to automatic generation
  arm64/sysreg: Convert DCZID_EL0 to automatic generation
  arm64/sysreg: Convert CTR_EL0 to automatic generation
  arm64/sysreg: Add _EL1 into ID_AA64ISAR2_EL1 definition names
  arm64/sysreg: Add _EL1 into ID_AA64ISAR1_EL1 definition names
  arm64/sysreg: Remove defines for RPRES enumeration
  arm64/sysreg: Standardise naming for ID_AA64ZFR0_EL1 fields
  arm64/sysreg: Standardise naming for ID_AA64SMFR0_EL1 enums
  arm64/sysreg: Standardise naming for WFxT defines
  arm64/sysreg: Make BHB clear feature defines match the architecture
  arm64/sysreg: Align pointer auth enumeration defines with architecture
  ...
2022-07-25 10:57:37 +01:00
James Morse 44b3834b2e arm64: errata: Remove AES hwcap for COMPAT tasks
Cortex-A57 and Cortex-A72 have an erratum where an interrupt that
occurs between a pair of AES instructions in aarch32 mode may corrupt
the ELR. The task will subsequently produce the wrong AES result.

The AES instructions are part of the cryptographic extensions, which are
optional. User-space software will detect the support for these
instructions from the hwcaps. If the platform doesn't support these
instructions a software implementation should be used.

Remove the hwcap bits on affected parts to indicate user-space should
not use the AES instructions.

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: James Morse <james.morse@arm.com>
Link: https://lore.kernel.org/r/20220714161523.279570-3-james.morse@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-19 19:27:01 +01:00
Mark Brown 3bbeca9930 arm64/sysreg: Convert ID_AA64ZFR0_EL1 to automatic generation
Convert ID_AA64ZFR0_EL1 to automatic register generation as per DDI0487H.a,
no functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-29-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:48 +01:00
Mark Brown 2bc589bd64 arm64/sysreg: Convert ID_AA64SMFR0_EL1 to automatic generation
Convert ID_AA64SMFR0_EL1 to automatic register generation as per DDI0487H.a,
no functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-28-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:47 +01:00
Mark Brown 12c897b4ff arm64/sysreg: Convert LORID_EL1 to automatic generation
Convert LORID_EL1 to automatic register generation as per DDI0487H.a, no
functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-27-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:47 +01:00
Mark Brown 41cc24e0c8 arm64/sysreg: Convert LORC_EL1 to automatic generation
Convert LORC_EL1 to automatic register generation as per DDI0487H.a, no
functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-26-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:47 +01:00
Mark Brown cdf428f79b arm64/sysreg: Convert LORN_EL1 to automatic generation
Convert LORN_EL1 to automatic register generation as per DDI0487H.a, no
functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-25-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:47 +01:00
Mark Brown 0d879f7a32 arm64/sysreg: Convert LOREA_EL1 to automatic generation
Convert LOREA_EL1 to automatic register generation as per DDI0487H.a, no
functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-24-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:47 +01:00
Mark Brown 464ca8df62 arm64/sysreg: Convert LORSA_EL1 to automatic generation
Convert LORSA_EL1 to automatic register generation as per DDI0487H.a, no
functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-23-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:47 +01:00
Mark Brown 8fcc8285c0 arm64/sysreg: Convert ID_AA64ISAR2_EL1 to automatic generation
Automatically generate defines for ID_AA64ISAR2_EL1, using the definitions
in DDI0487H.a. No functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-22-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:47 +01:00
Mark Brown f7b5115cc3 arm64/sysreg: Convert ID_AA64ISAR1_EL1 to automatic generation
Automatically generate defines for ID_AA64ISAR1_EL1, using the definitions
in DDI0487H.a. No functional changes.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-21-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:47 +01:00
Mark Brown d1b60bed63 arm64/sysreg: Convert GMID to automatic generation
Automatically generate the register definitions for GMID as per DDI0487H.a,
no functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-20-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:47 +01:00
Mark Brown 5589083d80 arm64/sysreg: Convert DCZID_EL0 to automatic generation
Convert DCZID_EL0 to automatic register generation as per DDI0487H.a, no
functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-19-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:47 +01:00
Mark Brown 9a3634d023 arm64/sysreg: Convert CTR_EL0 to automatic generation
Convert CTR_EL0 to automatic register generation as per DDI0487H.a, no
functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-18-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:47 +01:00
Mark Brown f43ff28651 arm64/sysreg: Allow leading blanks on comments in sysreg file
Currently we only accept comments where the # is placed at the start of a
line, allow leading blanks so we can format comments inside definitions in
a more pleasing manner.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220704170302.2609529-4-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-05 11:45:45 +01:00
Kristina Martsenko 3a46b352a3 arm64: trap implementation defined functionality in userspace
The Arm v8.8 extension adds a new control FEAT_TIDCP1 that allows the
kernel to disable all implementation-defined system registers and
instructions in userspace. This can improve robustness against covert
channels between processes, for example in cases where the firmware or
hardware didn't disable that functionality by default.

The kernel does not currently support any implementation-defined
features, as there are no hwcaps for any such features, so disable all
imp-def features unconditionally. Any use of imp-def instructions will
result in a SIGILL being delivered to the process (same as for undefined
instructions).

Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20220622115424.683520-1-kristina.martsenko@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
2022-06-23 18:40:38 +01:00
Alejandro Tafalla ce253b8573 arm64/sysreg: Fix typo in Enum element regex
In the awk script, there was a typo with the comparison operator when
checking if the matched pattern is inside an Enum block.
This prevented the generation of the whole sysreg-defs.h header.

Fixes: 66847e0618 ("arm64: Add sysreg header generation scripting")
Signed-off-by: Alejandro Tafalla <atafalla@dnyon.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220609204220.12112-1-atafalla@dnyon.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-06-10 16:23:48 +01:00
Linus Torvalds bf9095424d S390:
* ultravisor communication device driver
 
 * fix TEID on terminating storage key ops
 
 RISC-V:
 
 * Added Sv57x4 support for G-stage page table
 
 * Added range based local HFENCE functions
 
 * Added remote HFENCE functions based on VCPU requests
 
 * Added ISA extension registers in ONE_REG interface
 
 * Updated KVM RISC-V maintainers entry to cover selftests support
 
 ARM:
 
 * Add support for the ARMv8.6 WFxT extension
 
 * Guard pages for the EL2 stacks
 
 * Trap and emulate AArch32 ID registers to hide unsupported features
 
 * Ability to select and save/restore the set of hypercalls exposed
   to the guest
 
 * Support for PSCI-initiated suspend in collaboration with userspace
 
 * GICv3 register-based LPI invalidation support
 
 * Move host PMU event merging into the vcpu data structure
 
 * GICv3 ITS save/restore fixes
 
 * The usual set of small-scale cleanups and fixes
 
 x86:
 
 * New ioctls to get/set TSC frequency for a whole VM
 
 * Allow userspace to opt out of hypercall patching
 
 * Only do MSR filtering for MSRs accessed by rdmsr/wrmsr
 
 AMD SEV improvements:
 
 * Add KVM_EXIT_SHUTDOWN metadata for SEV-ES
 
 * V_TSC_AUX support
 
 Nested virtualization improvements for AMD:
 
 * Support for "nested nested" optimizations (nested vVMLOAD/VMSAVE,
   nested vGIF)
 
 * Allow AVIC to co-exist with a nested guest running
 
 * Fixes for LBR virtualizations when a nested guest is running,
   and nested LBR virtualization support
 
 * PAUSE filtering for nested hypervisors
 
 Guest support:
 
 * Decoupling of vcpu_is_preempted from PV spinlocks
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
 "S390:

   - ultravisor communication device driver

   - fix TEID on terminating storage key ops

  RISC-V:

   - Added Sv57x4 support for G-stage page table

   - Added range based local HFENCE functions

   - Added remote HFENCE functions based on VCPU requests

   - Added ISA extension registers in ONE_REG interface

   - Updated KVM RISC-V maintainers entry to cover selftests support

  ARM:

   - Add support for the ARMv8.6 WFxT extension

   - Guard pages for the EL2 stacks

   - Trap and emulate AArch32 ID registers to hide unsupported features

   - Ability to select and save/restore the set of hypercalls exposed to
     the guest

   - Support for PSCI-initiated suspend in collaboration with userspace

   - GICv3 register-based LPI invalidation support

   - Move host PMU event merging into the vcpu data structure

   - GICv3 ITS save/restore fixes

   - The usual set of small-scale cleanups and fixes

  x86:

   - New ioctls to get/set TSC frequency for a whole VM

   - Allow userspace to opt out of hypercall patching

   - Only do MSR filtering for MSRs accessed by rdmsr/wrmsr

  AMD SEV improvements:

   - Add KVM_EXIT_SHUTDOWN metadata for SEV-ES

   - V_TSC_AUX support

  Nested virtualization improvements for AMD:

   - Support for "nested nested" optimizations (nested vVMLOAD/VMSAVE,
     nested vGIF)

   - Allow AVIC to co-exist with a nested guest running

   - Fixes for LBR virtualizations when a nested guest is running, and
     nested LBR virtualization support

   - PAUSE filtering for nested hypervisors

  Guest support:

   - Decoupling of vcpu_is_preempted from PV spinlocks"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (199 commits)
  KVM: x86: Fix the intel_pt PMI handling wrongly considered from guest
  KVM: selftests: x86: Sync the new name of the test case to .gitignore
  Documentation: kvm: reorder ARM-specific section about KVM_SYSTEM_EVENT_SUSPEND
  x86, kvm: use correct GFP flags for preemption disabled
  KVM: LAPIC: Drop pending LAPIC timer injection when canceling the timer
  x86/kvm: Alloc dummy async #PF token outside of raw spinlock
  KVM: x86: avoid calling x86 emulator without a decoded instruction
  KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak
  x86/fpu: KVM: Set the base guest FPU uABI size to sizeof(struct kvm_xsave)
  s390/uv_uapi: depend on CONFIG_S390
  KVM: selftests: x86: Fix test failure on arch lbr capable platforms
  KVM: LAPIC: Trace LAPIC timer expiration on every vmentry
  KVM: s390: selftest: Test suppression indication on key prot exception
  KVM: s390: Don't indicate suppression on dirtying, failing memop
  selftests: drivers/s390x: Add uvdevice tests
  drivers/s390/char: Add Ultravisor io device
  MAINTAINERS: Update KVM RISC-V entry to cover selftests support
  RISC-V: KVM: Introduce ISA extension register
  RISC-V: KVM: Cleanup stale TLB entries when host CPU changes
  RISC-V: KVM: Add remote HFENCE functions based on VCPU requests
  ...
2022-05-26 14:20:14 -07:00
Mark Brown dffdeade18 arm64/sysreg: Generate definitions for FAR_ELx
Convert FAR_ELx to automatic register generation as per DDI0487H.a. In the
architecture these registers have a single field "named" as "Faulting
Virtual Address for synchronous exceptions taken to ELx" occupying the
entire register, in order to fit in with the requirement to describe the
contents of the register I have created a single field named ADDR.

No functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220520161639.324236-7-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-05-20 18:49:58 +01:00
Mark Brown 01baa57ad6 arm64/sysreg: Generate definitions for DACR32_EL2
Convert DACR32_EL2 to automatic register generation as per DDI0487H.a, no
functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220520161639.324236-6-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-05-20 18:49:58 +01:00
Mark Brown 8bd354b305 arm64/sysreg: Generate definitions for CSSELR_EL1
Convert CSSELR_EL1 to automatic generation as per DDI0487H.a, no functional
change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220520161639.324236-5-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-05-20 18:49:58 +01:00
Mark Brown b5c0f1051d arm64/sysreg: Generate definitions for CPACR_ELx
Convert the CPACR system register definitions to be automatically generated
using the definitions in DDI0487H.a. The kernel does have some additional
definitions for subfields of SMEN, FPEN and ZEN which are not identified as
distinct subfields in the architecture so the definitions are not updated
as part of this patch.

No functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220520161639.324236-4-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-05-20 18:49:29 +01:00
Mark Brown 8c12e22c9f arm64/sysreg: Generate definitions for CONTEXTIDR_ELx
Convert the various CONTEXTIDR_ELx register definitions to be automatically
generated following the definitions in DDI0487H.a. No functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220520161639.324236-3-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-05-20 18:47:47 +01:00
Mark Brown af65ea977b arm64/sysreg: Generate definitions for CLIDR_EL1
Convert CLIDR_EL1 to be automatically generated with definition as per
DDI0487H.a. No functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220520161639.324236-2-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-05-20 18:47:47 +01:00
Mark Brown 89e9fb3274 arm64/sve: Generate ZCR definitions
Convert the various ZCR instances to automatic generation, no functional
changes expected.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220510161208.631259-13-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-05-16 19:50:21 +01:00
Mark Brown 11e12a91c1 arm64/sme: Generate defintions for SVCR
Convert SVCR to automatic generation, no functional change.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220510161208.631259-12-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-05-16 19:50:21 +01:00