Mark Brown 99255a2b68 arm64/ptrace: Don't enable SVE when setting streaming SVE ... commit 045aecdfcb upstream. Systems which implement SME without also implementing SVE are architecturally valid but were not initially supported by the kernel, unfortunately we missed one issue in the ptrace code. The SVE register setting code is shared between SVE and streaming mode SVE. When we set full SVE register state we currently enable TIF_SVE unconditionally, in the case where streaming SVE is being configured on a system that supports vanilla SVE this is not an issue since we always initialise enough state for both vector lengths but on a system which only support SME it will result in us attempting to restore the SVE vector length after having set streaming SVE registers. Fix this by making the enabling of SVE conditional on setting SVE vector state. If we set streaming SVE state and SVE was not already enabled this will result in a SVE access trap on next use of normal SVE, this will cause us to flush our register state but this is fine since the only way to trigger a SVE access trap would be to exit streaming mode which will cause the in register state to be flushed anyway. Fixes: e12310a0d3 ("arm64/sme: Implement ptrace support for streaming mode SVE registers") Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20230803-arm64-fix-ptrace-ssve-no-sve-v1-1-49df214bfb3e@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> [Fix up backport -- broonie] Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-08-11 12:08:26 +02:00
..
boot	arm64: dts: stratix10: fix incorrect I2C property for SCL signal	2023-08-11 12:08:20 +02:00
configs	This update includes the following changes:	2022-10-10 13:04:25 -07:00
crypto	crypto: arm64/aes-neonbs - fix crash with CFI enabled	2023-05-11 23:03:02 +09:00
hyperv	hyperv: simplify and rename generate_guest_id	2022-09-28 13:36:56 +00:00
include	arm64: sme: Use STR P to clear FFR context field in streaming SVE mode	2023-07-19 16:21:45 +02:00
kernel	arm64/ptrace: Don't enable SVE when setting streaming SVE	2023-08-11 12:08:26 +02:00
kvm	arm64: errata: Mitigate Ampere1 erratum AC03_CPU_38 at stage-2	2023-08-03 10:23:54 +02:00
lib	Networking changes for 6.0.	2022-08-03 16:29:08 -07:00
mm	arm64/mm: Convert to using lock_mm_and_find_vma()	2023-07-01 13:16:24 +02:00
net	bpf, arm64: Fix BTI type used for freplace attached functions	2023-07-27 08:50:44 +02:00
tools	arm64: errata: Mitigate Ampere1 erratum AC03_CPU_38 at stage-2	2023-08-03 10:23:54 +02:00
xen
Kbuild
Kconfig	arm64: errata: Mitigate Ampere1 erratum AC03_CPU_38 at stage-2	2023-08-03 10:23:54 +02:00
Kconfig.debug
Kconfig.platforms	ARM: SoC code changes for 6.1	2022-10-06 11:22:25 -07:00
Makefile	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00