linux-stable

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-22 02:20:40 +00:00

No description

Find a file

Mark Rutland 745eec68a3 arm64: errata: Expand speculative SSBS workaround (again) [ Upstream commit `adeec61a47` ] A number of Arm Ltd CPUs suffer from errata whereby an MSR to the SSBS special-purpose register does not affect subsequent speculative instructions, permitting speculative store bypassing for a window of time. We worked around this for a number of CPUs in commits: * `7187bb7d0b` ("arm64: errata: Add workaround for Arm errata 3194386 and 3312417") * `75b3c43eab` ("arm64: errata: Expand speculative SSBS workaround") Since then, similar errata have been published for a number of other Arm Ltd CPUs, for which the same mitigation is sufficient. This is described in their respective Software Developer Errata Notice (SDEN) documents: * Cortex-A76 (MP052) SDEN v31.0, erratum 3324349 https://developer.arm.com/documentation/SDEN-885749/3100/ * Cortex-A77 (MP074) SDEN v19.0, erratum 3324348 https://developer.arm.com/documentation/SDEN-1152370/1900/ * Cortex-A78 (MP102) SDEN v21.0, erratum 3324344 https://developer.arm.com/documentation/SDEN-1401784/2100/ * Cortex-A78C (MP138) SDEN v16.0, erratum 3324346 https://developer.arm.com/documentation/SDEN-1707916/1600/ * Cortex-A78C (MP154) SDEN v10.0, erratum 3324347 https://developer.arm.com/documentation/SDEN-2004089/1000/ * Cortex-A725 (MP190) SDEN v5.0, erratum 3456106 https://developer.arm.com/documentation/SDEN-2832921/0500/ * Cortex-X1 (MP077) SDEN v21.0, erratum 3324344 https://developer.arm.com/documentation/SDEN-1401782/2100/ * Cortex-X1C (MP136) SDEN v16.0, erratum 3324346 https://developer.arm.com/documentation/SDEN-1707914/1600/ * Neoverse-N1 (MP050) SDEN v32.0, erratum 3324349 https://developer.arm.com/documentation/SDEN-885747/3200/ * Neoverse-V1 (MP076) SDEN v19.0, erratum 3324341 https://developer.arm.com/documentation/SDEN-1401781/1900/ Note that due to the manner in which Arm develops IP and tracks errata, some CPUs share a common erratum number and some CPUs have multiple erratum numbers for the same HW issue. On parts without SB, it is necessary to use ISB for the workaround. The spec_bar() macro used in the mitigation will expand to a "DSB SY; ISB" sequence in this case, which is sufficient on all affected parts. Enable the existing mitigation by adding the relevant MIDRs to erratum_spec_ssbs_list. The list is sorted alphanumerically (involving moving Neoverse-V3 after Neoverse-V2) so that this is easy to audit and potentially extend again in future. The Kconfig text is also updated to clarify the set of affected parts and the mitigation. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: James Morse <james.morse@arm.com> Cc: Will Deacon <will@kernel.org> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20240801101803.1982459-4-mark.rutland@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> [ Mark: fix conflicts in silicon-errata.rst ] Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-08-14 13:58:49 +02:00
arch	arm64: errata: Expand speculative SSBS workaround (again)	2024-08-14 13:58:49 +02:00
block
certs
crypto
Documentation	arm64: errata: Expand speculative SSBS workaround (again)	2024-08-14 13:58:49 +02:00
drivers	irqchip/loongarch-cpu: Fix return value of lpic_gsi_to_irq()	2024-08-14 13:58:47 +02:00
fs	jbd2: avoid memleak in jbd2_journal_write_metadata_buffer	2024-08-14 13:58:46 +02:00
include	net: drop bad gso csum_start and offset in virtio_net_hdr	2024-08-14 13:58:48 +02:00
init	rust: SHADOW_CALL_STACK is incompatible with Rust	2024-08-11 12:47:24 +02:00
io_uring
ipc
kernel	sched/cputime: Fix mul_u64_u64_div_u64() precision for cputime	2024-08-14 13:58:47 +02:00
lib
LICENSES
mm
net	net: drop bad gso csum_start and offset in virtio_net_hdr	2024-08-14 13:58:48 +02:00
rust
samples
scripts
security
sound	Revert "ALSA: firewire-lib: operate for period elapse event in process context"	2024-08-11 12:47:25 +02:00
tools	selftests/bpf: Fix send_signal test with nested CONFIG_PARAVIRT	2024-08-14 13:58:42 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
.rustfmt.toml
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile	Linux 6.6.45	2024-08-11 12:47:28 +02:00
README

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.