linux/arch/arm64
Dave Martin 5043694eb8 arm64/sve: Document firmware support requirements in Kconfig
Use of SVE by EL2 and below requires explicit support in the
firmware.  There is no means to hide the presence of SVE from EL2,
so a kernel configured with CONFIG_ARM64_SVE=y will typically not
work correctly on SVE capable hardware unless the firmware does
include the appropriate support.

This is not expected to pose a problem in the wild, since platform
integrators are responsible for ensuring that they ship up-to-date
firmware to support their hardware.  However, developers may hit
the issue when using mismatched compoments.

In order to draw attention to the issue and how to solve it, this
patch adds some Kconfig text giving a brief explanation and details
of compatible firmware versions.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-03-26 12:29:35 +01:00
..
boot ARM: SoC device tree updates for 4.16 2018-02-01 16:07:54 -08:00
configs ARM: SoC platform updates for 4.16 2018-02-01 16:17:40 -08:00
crypto crypto: arm64/sha512 - fix/improve new v8.2 Crypto Extensions code 2018-01-26 01:10:36 +11:00
include arm64: fpsimd: Fix bad si_code for undiagnosed SIGFPE 2018-03-20 10:03:11 +00:00
kernel arm64: fpsimd: Fix bad si_code for undiagnosed SIGFPE 2018-03-20 10:03:11 +00:00
kvm arm64: Add missing Falkor part number for branch predictor hardening 2018-02-12 11:28:45 +00:00
lib arm64: lse: Pass -fomit-frame-pointer to out-of-line ll/sc atomics 2018-03-06 18:52:32 +00:00
mm arm64: signal: Ensure si_code is valid for all fault signals 2018-03-09 13:58:36 +00:00
net bpf, arm64: fix out of bounds access in tail call 2018-02-22 16:06:28 -08:00
xen arm64: mm: Add additional parameter to uaccess_ttbr0_disable 2018-01-17 13:57:49 +01:00
Kconfig arm64/sve: Document firmware support requirements in Kconfig 2018-03-26 12:29:35 +01:00
Kconfig.debug
Kconfig.platforms
Makefile arm64/kernel: don't ban ADRP to work around Cortex-A53 erratum #843419 2018-03-09 13:21:53 +00:00