linux/arch/arm64
James Morse ba2689234b arm64: entry: Add vectors that have the bhb mitigation sequences
Some CPUs affected by Spectre-BHB need a sequence of branches, or a
firmware call to be run before any indirect branch. This needs to go
in the vectors. No CPU needs both.

While this can be patched in, it would run on all CPUs as there is a
single set of vectors. If only one part of a big/little combination is
affected, the unaffected CPUs have to run the mitigation too.

Create extra vectors that include the sequence. Subsequent patches will
allow affected CPUs to select this set of vectors. Later patches will
modify the loop count to match what the CPU requires.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
2022-02-16 13:16:08 +00:00
..
boot sound updates for 5.17-rc1 2022-01-14 14:55:38 +01:00
configs arm64: defconfig: Enable Samsung I2C driver 2021-12-21 12:18:44 +01:00
crypto arm64: Add macro version of the BTI instruction 2021-12-14 18:12:58 +00:00
hyperv
include arm64: entry: Add vectors that have the bhb mitigation sequences 2022-02-16 13:16:08 +00:00
kernel arm64: entry: Add vectors that have the bhb mitigation sequences 2022-02-16 13:16:08 +00:00
kvm KVM: arm64: Allow indirect vectors to be used without SPECTRE_V3A 2022-02-15 17:38:25 +00:00
lib Merge branches 'for-next/misc', 'for-next/cache-ops-dzp', 'for-next/stacktrace', 'for-next/xor-neon', 'for-next/kasan', 'for-next/armv8_7-fp', 'for-next/atomics', 'for-next/bti', 'for-next/sve', 'for-next/kselftest' and 'for-next/kcsan', remote-tracking branch 'arm64/for-next/perf' into for-next/core 2022-01-05 18:14:32 +00:00
mm arm64: entry: Allow the trampoline text to occupy multiple pages 2022-02-15 17:40:28 +00:00
net bpf, arm64: Use emit_addr_mov_i64() for BPF_PSEUDO_FUNC 2022-01-05 20:43:08 +01:00
tools KVM: arm64: Workaround Cortex-A510's single-step and PAC trap errata 2022-02-03 09:22:30 +00:00
xen xen: allow pv-only hypercalls only with CONFIG_XEN_PV 2021-11-02 08:11:01 -05:00
Kbuild kbuild: use more subdir- for visiting subdirectories while cleaning 2021-10-24 13:49:46 +09:00
Kconfig KVM: arm64: Workaround Cortex-A510's single-step and PAC trap errata 2022-02-03 09:22:30 +00:00
Kconfig.debug
Kconfig.platforms ARM: SoC updates for v5.17 2022-01-10 08:10:20 -08:00
Makefile arm64/xor: use EOR3 instructions when available 2021-12-14 12:14:26 +00:00