[PATCH v3 17/28] arm64/sve: Preserve SVE registers around kernel-mode NEON use

[PATCH v3 00/28] ARM Scalable Vector Extension (SVE) · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 01/28] regset: Add support for dynamically sized regsets · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
Re: [PATCH v3 01/28] regset: Add support for dynamically sized regsets · Catalin Marinas <catalin.marinas@arm.com> · 2017-10-11
Re: [PATCH v3 01/28] regset: Add support for dynamically sized regsets · Dave Martin <Dave.Martin@arm.com> · 2017-10-11
[PATCH v3 02/28] arm64: KVM: Hide unsupported AArch64 CPU features from guests · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 02/28] arm64: KVM: Hide unsupported AArch64 CPU features from guests · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 02/28] arm64: KVM: Hide unsupported AArch64 CPU features from guests · Marc Zyngier <hidden> · 2017-10-11
[PATCH v3 02/28] arm64: KVM: Hide unsupported AArch64 CPU features from guests · Christoffer Dall <hidden> · 2017-10-17
[PATCH v3 02/28] arm64: KVM: Hide unsupported AArch64 CPU features from guests · Marc Zyngier <hidden> · 2017-10-17
[PATCH v3 02/28] arm64: KVM: Hide unsupported AArch64 CPU features from guests · Christoffer Dall <hidden> · 2017-10-18
[PATCH v3 02/28] arm64: KVM: Hide unsupported AArch64 CPU features from guests · Dave.Martin@arm.com (Dave Martin) · 2017-10-18
[PATCH v3 02/28] arm64: KVM: Hide unsupported AArch64 CPU features from guests · Christoffer Dall <hidden> · 2017-10-18
[PATCH v3 03/28] arm64: efi: Add missing Kconfig dependency on KERNEL_MODE_NEON · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 03/28] arm64: efi: Add missing Kconfig dependency on KERNEL_MODE_NEON · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 03/28] arm64: efi: Add missing Kconfig dependency on KERNEL_MODE_NEON · Dave.Martin@arm.com (Dave Martin) · 2017-10-11
[PATCH v3 04/28] arm64: Port deprecated instruction emulation to new sysctl interface · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 04/28] arm64: Port deprecated instruction emulation to new sysctl interface · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 05/28] arm64: fpsimd: Simplify uses of {set, clear}_ti_thread_flag() · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 05/28] arm64: fpsimd: Simplify uses of {set, clear}_ti_thread_flag() · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 06/28] arm64/sve: System register and exception syndrome definitions · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 06/28] arm64/sve: System register and exception syndrome definitions · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 07/28] arm64/sve: Low-level SVE architectural state manipulation functions · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 07/28] arm64/sve: Low-level SVE architectural state manipulation functions · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 07/28] arm64/sve: Low-level SVE architectural state manipulation functions · Dave.Martin@arm.com (Dave Martin) · 2017-10-11
[PATCH v3 08/28] arm64/sve: Kconfig update and conditional compilation support · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 08/28] arm64/sve: Kconfig update and conditional compilation support · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 09/28] arm64/sve: Signal frame and context structure definition · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 09/28] arm64/sve: Signal frame and context structure definition · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 10/28] arm64/sve: Low-level CPU setup · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 10/28] arm64/sve: Low-level CPU setup · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 11/28] arm64/sve: Core task context handling · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 11/28] arm64/sve: Core task context handling · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 11/28] arm64/sve: Core task context handling · Dave.Martin@arm.com (Dave Martin) · 2017-10-12
[PATCH v3 11/28] arm64/sve: Core task context handling · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-13
[PATCH v3 11/28] arm64/sve: Core task context handling · Dave.Martin@arm.com (Dave Martin) · 2017-10-13
[PATCH v3 12/28] arm64/sve: Support vector length resetting for new processes · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 12/28] arm64/sve: Support vector length resetting for new processes · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 13/28] arm64/sve: Signal handling support · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 13/28] arm64/sve: Signal handling support · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 13/28] arm64/sve: Signal handling support · Dave.Martin@arm.com (Dave Martin) · 2017-10-12
[PATCH v3 13/28] arm64/sve: Signal handling support · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-13
[PATCH v3 13/28] arm64/sve: Signal handling support · Dave.Martin@arm.com (Dave Martin) · 2017-10-13
[PATCH v3 14/28] arm64/sve: Backend logic for setting the vector length · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 14/28] arm64/sve: Backend logic for setting the vector length · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 15/28] arm64: cpufeature: Move sys_caps_initialised declarations · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 15/28] arm64: cpufeature: Move sys_caps_initialised declarations · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 16/28] arm64/sve: Probe SVE capabilities and usable vector lengths · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 16/28] arm64/sve: Probe SVE capabilities and usable vector lengths · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-11
[PATCH v3 16/28] arm64/sve: Probe SVE capabilities and usable vector lengths · Suzuki.Poulose@arm.com (Suzuki K Poulose) · 2017-10-12
[PATCH v3 16/28] arm64/sve: Probe SVE capabilities and usable vector lengths · Dave.Martin@arm.com (Dave Martin) · 2017-10-16
[PATCH v3 16/28] arm64/sve: Probe SVE capabilities and usable vector lengths · Suzuki.Poulose@arm.com (Suzuki K Poulose) · 2017-10-16
[PATCH v3 16/28] arm64/sve: Probe SVE capabilities and usable vector lengths · Dave.Martin@arm.com (Dave Martin) · 2017-10-16
[PATCH v3 16/28] arm64/sve: Probe SVE capabilities and usable vector lengths · Suzuki.Poulose@arm.com (Suzuki K Poulose) · 2017-10-16
[PATCH v3 16/28] arm64/sve: Probe SVE capabilities and usable vector lengths · Dave.Martin@arm.com (Dave Martin) · 2017-10-16
[PATCH v3 16/28] arm64/sve: Probe SVE capabilities and usable vector lengths · Suzuki.Poulose@arm.com (Suzuki K Poulose) · 2017-10-16
[PATCH v3 17/28] arm64/sve: Preserve SVE registers around kernel-mode NEON use · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 17/28] arm64/sve: Preserve SVE registers around kernel-mode NEON use · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-12
[PATCH v3 18/28] arm64/sve: Preserve SVE registers around EFI runtime service calls · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 18/28] arm64/sve: Preserve SVE registers around EFI runtime service calls · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-12
[PATCH v3 19/28] arm64/sve: ptrace and ELF coredump support · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 19/28] arm64/sve: ptrace and ELF coredump support · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-12
[PATCH v3 19/28] arm64/sve: ptrace and ELF coredump support · Dave.Martin@arm.com (Dave Martin) · 2017-10-13
[PATCH v3 19/28] arm64/sve: ptrace and ELF coredump support · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-18
[PATCH v3 19/28] arm64/sve: ptrace and ELF coredump support · Dave.Martin@arm.com (Dave Martin) · 2017-10-18
[PATCH v3 20/28] arm64/sve: Add prctl controls for userspace vector length management · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 20/28] arm64/sve: Add prctl controls for userspace vector length management · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-12
[PATCH v3 21/28] arm64/sve: Add sysctl to set the default vector length for new processes · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 21/28] arm64/sve: Add sysctl to set the default vector length for new processes · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-12
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · Marc Zyngier <hidden> · 2017-10-11
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · Dave.Martin@arm.com (Dave Martin) · 2017-10-12
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · Marc Zyngier <hidden> · 2017-10-12
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · Dave.Martin@arm.com (Dave Martin) · 2017-10-13
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · Marc Zyngier <hidden> · 2017-10-13
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · Dave.Martin@arm.com (Dave Martin) · 2017-10-13
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-12
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · Christoffer Dall <hidden> · 2017-10-17
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · Dave.Martin@arm.com (Dave Martin) · 2017-10-17
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · Christoffer Dall <hidden> · 2017-10-18
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · Dave.Martin@arm.com (Dave Martin) · 2017-10-18
[PATCH v3 22/28] arm64/sve: KVM: Prevent guests from using SVE · Christoffer Dall <hidden> · 2017-10-18
[PATCH v3 23/28] arm64/sve: KVM: Treat guest SVE use as undefined instruction execution · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 23/28] arm64/sve: KVM: Treat guest SVE use as undefined instruction execution · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-12
[PATCH v3 23/28] arm64/sve: KVM: Treat guest SVE use as undefined instruction execution · Christoffer Dall <hidden> · 2017-10-17
[PATCH v3 24/28] arm64/sve: KVM: Hide SVE from CPU features exposed to guests · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 24/28] arm64/sve: KVM: Hide SVE from CPU features exposed to guests · Marc Zyngier <hidden> · 2017-10-11
[PATCH v3 24/28] arm64/sve: KVM: Hide SVE from CPU features exposed to guests · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-12
[PATCH v3 24/28] arm64/sve: KVM: Hide SVE from CPU features exposed to guests · Christoffer Dall <hidden> · 2017-10-17
[PATCH v3 24/28] arm64/sve: KVM: Hide SVE from CPU features exposed to guests · Dave.Martin@arm.com (Dave Martin) · 2017-10-17
[PATCH v3 24/28] arm64/sve: KVM: Hide SVE from CPU features exposed to guests · Marc Zyngier <hidden> · 2017-10-17
[PATCH v3 24/28] arm64/sve: KVM: Hide SVE from CPU features exposed to guests · Dave.Martin@arm.com (Dave Martin) · 2017-10-17
[PATCH v3 24/28] arm64/sve: KVM: Hide SVE from CPU features exposed to guests · Christoffer Dall <hidden> · 2017-10-18
[PATCH v3 24/28] arm64/sve: KVM: Hide SVE from CPU features exposed to guests · Dave.Martin@arm.com (Dave Martin) · 2017-10-18
[PATCH v3 24/28] arm64/sve: KVM: Hide SVE from CPU features exposed to guests · Christoffer Dall <hidden> · 2017-10-18
[PATCH v3 25/28] arm64/sve: Detect SVE and activate runtime support · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 25/28] arm64/sve: Detect SVE and activate runtime support · Suzuki.Poulose@arm.com (Suzuki K Poulose) · 2017-10-11
[PATCH v3 25/28] arm64/sve: Detect SVE and activate runtime support · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-12
[PATCH v3 26/28] arm64/sve: Add documentation · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[PATCH v3 26/28] arm64/sve: Add documentation · Szabolcs Nagy <hidden> · 2017-10-11
[PATCH v3 26/28] arm64/sve: Add documentation · Dave.Martin@arm.com (Dave Martin) · 2017-10-11
[PATCH v3 26/28] arm64/sve: Add documentation · Szabolcs Nagy <hidden> · 2017-10-11
[PATCH v3 26/28] arm64/sve: Add documentation · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-13
[PATCH v3 26/28] arm64/sve: Add documentation · Dave.Martin@arm.com (Dave Martin) · 2017-10-13
[PATCH v3 26/28] arm64/sve: Add documentation · catalin.marinas@arm.com (Catalin Marinas) · 2017-10-18
[PATCH v3 26/28] arm64/sve: Add documentation · Dave.Martin@arm.com (Dave Martin) · 2017-10-13
[RFC PATCH v3 27/28] arm64: signal: Report signal frame size to userspace via auxv · Dave.Martin@arm.com (Dave Martin) · 2017-10-10
[RFC PATCH v3 27/28] arm64: signal: Report signal frame size to userspace via auxv · Szabolcs Nagy <hidden> · 2017-10-11
[RFC PATCH v3 27/28] arm64: signal: Report signal frame size to userspace via auxv · Dave.Martin@arm.com (Dave P Martin) · 2017-10-11
[RFC PATCH v3 28/28] arm64/sve: signal: Include SVE when computing AT_MINSIGSTKSZ · Dave.Martin@arm.com (Dave Martin) · 2017-10-10

STALE3151d REVIEWED: 3 (3M)

From: catalin.marinas@arm.com (Catalin Marinas)
Date: 2017-10-12 10:15:48
Also in: kvmarm, linux-arch

On Tue, Oct 10, 2017 at 07:38:34PM +0100, Dave P Martin wrote:

Kernel-mode NEON will corrupt the SVE vector registers, due to the
way they alias the FPSIMD vector registers in the hardware.

This patch ensures that any live SVE register content for the task
is saved by kernel_neon_begin().  The data will be restored in the
usual way on return to userspace.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Ard Biesheuvel <redacted>
Reviewed-by: Alex Benn?e <redacted>

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>

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