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Subject[PATCH v11 00/19] KVM: arm64: Optimise FPSIMD context switching
Date
Note: Most of these patches are Arm-specific.  People not Cc'd on the
whole series can find it in the linux-arm-kernel archive [2].

Git: see [3]

This series aims to improve the way FPSIMD context is handled by KVM.
Changes since the previous v10 [1] are minor, but one patch has been
split.

** To Catalin Marinas, Alex Bennée: **

I have retained your Reviewed-bys on patches 7 and 8: these were split
from patch 7 of v9. Although the code is (almost) the same as noted
below, I advise you to take a look.

(all) reviewers please note:

* Patches 7 and 8 have been split from the previous patch 7, since
the update to INIT_THREAD_INFO is logically a fix and deserves
a Fixes: tag.

I have also moved the definition of INIT_THREAD_INFO to after the
TIF_* definitions that it now depends on (mysteriously this wasn't
causing a compile error anyway, but I've not dug into why).

* Other changes are all additions or rewordings of comments, and
amendments commit messages.

Cheers
---Dave

[1] [PATCH v10 00/18] KVM: arm64: Optimise FPSIMD context switching
http://lists.infradead.org/pipermail/linux-arm-kernel/2018-May/579899.html

[2] linux-arm-kernel archive
http://lists.infradead.org/pipermail/linux-arm-kernel/2018-May/thread.html

[3] http://linux-arm.org/git?p=linux-dm.git;a=shortlog;h=refs/heads/kvm-vhe-fpsimd/v11

Christoffer Dall (1):
KVM: arm/arm64: Introduce kvm_arch_vcpu_run_pid_change

Dave Martin (18):
arm64: fpsimd: Fix TIF_FOREIGN_FPSTATE after invalidating cpu regs
thread_info: Add update_thread_flag() helpers
arm64: Use update{,_tsk}_thread_flag()
KVM: arm64: Convert lazy FPSIMD context switch trap to C
arm64: fpsimd: Generalise context saving for non-task contexts
arm64: fpsimd: Avoid FPSIMD context leakage for the init task
arm64: fpsimd: Eliminate task->mm checks
arm64/sve: Refactor user SVE trap maintenance for external use
KVM: arm64: Repurpose vcpu_arch.debug_flags for general-purpose flags
KVM: arm64: Optimise FPSIMD handling to reduce guest/host thrashing
arm64/sve: Move read_zcr_features() out of cpufeature.h
arm64/sve: Switch sve_pffr() argument from task to thread
arm64/sve: Move sve_pffr() to fpsimd.h and make inline
KVM: arm64: Save host SVE context as appropriate
KVM: arm64: Remove eager host SVE state saving
KVM: arm64: Remove redundant *exit_code changes in fpsimd_guest_exit()
KVM: arm64: Fold redundant exit code checks out of fixup_guest_exit()
KVM: arm64: Invoke FPSIMD context switch trap from C

arch/arm/include/asm/kvm_host.h | 10 +-
arch/arm64/Kconfig | 7 ++
arch/arm64/include/asm/cpufeature.h | 29 ------
arch/arm64/include/asm/fpsimd.h | 21 +++++
arch/arm64/include/asm/kvm_asm.h | 3 -
arch/arm64/include/asm/kvm_host.h | 45 +++++++--
arch/arm64/include/asm/processor.h | 15 ++-
arch/arm64/include/asm/thread_info.h | 13 +--
arch/arm64/kernel/fpsimd.c | 177 +++++++++++++++++------------------
arch/arm64/kernel/ptrace.c | 1 +
arch/arm64/kvm/Kconfig | 1 +
arch/arm64/kvm/Makefile | 2 +-
arch/arm64/kvm/debug.c | 8 +-
arch/arm64/kvm/fpsimd.c | 110 ++++++++++++++++++++++
arch/arm64/kvm/hyp/debug-sr.c | 6 +-
arch/arm64/kvm/hyp/entry.S | 43 ---------
arch/arm64/kvm/hyp/hyp-entry.S | 19 ----
arch/arm64/kvm/hyp/switch.c | 124 ++++++++++++++++--------
arch/arm64/kvm/hyp/sysreg-sr.c | 4 +-
arch/arm64/kvm/sys_regs.c | 9 +-
include/linux/kvm_host.h | 9 ++
include/linux/sched.h | 6 ++
include/linux/thread_info.h | 11 +++
virt/kvm/Kconfig | 3 +
virt/kvm/arm/arm.c | 14 ++-
virt/kvm/kvm_main.c | 7 +-
26 files changed, 437 insertions(+), 260 deletions(-)
create mode 100644 arch/arm64/kvm/fpsimd.c

--
2.1.4

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