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From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: x86@kernel.org, Peter Zijlstra <peterz@infradead.org>,
	Andy Lutomirski <luto@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Marc Zyngier <maz@kernel.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	kvm@vger.kernel.org, linux-arch@vger.kernel.org
Subject: [RFC patch 00/15] entry: Provide generic implementation for host and guest entry/exit work
Date: Thu, 19 Sep 2019 17:03:14 +0200
Message-ID: <20190919150314.054351477@linutronix.de> (raw)

When working on a way to move out the posix cpu timer expiry out of the
timer interrupt context, I noticed that KVM is not handling pending task
work before entering a guest. A quick hack was to add that to the x86 KVM
handling loop. The discussion ended with a request to make this a generic
infrastructure possible with also moving the per arch implementations of
the enter from and return to user space handling generic.

  https://lore.kernel.org/r/89E42BCC-47A8-458B-B06A-D6A20D20512C@amacapital.net

You asked for it, so don't complain that you have to review it :)

The series implements the syscall enter/exit and the general exit to
userspace work handling along with the pre guest enter functionality.

The series converts x86 and ARM64. x86 is fully tested including selftests
etc. ARM64 is only compile tested for now as my only ARM64 testbox is not
available right now.

Thanks,

	tglx

---
 /Makefile                               |    3 
 arch/Kconfig                            |    3 
 arch/arm64/Kconfig                      |    1 
 arch/arm64/include/asm/kvm_host.h       |    1 
 arch/arm64/kernel/entry.S               |   18 -
 arch/arm64/kernel/ptrace.c              |   65 ------
 arch/arm64/kernel/signal.c              |   45 ----
 arch/arm64/kernel/syscall.c             |   49 ----
 arch/x86/Kconfig                        |    1 
 arch/x86/entry/common.c                 |  265 +-------------------------
 arch/x86/entry/entry_32.S               |   13 -
 arch/x86/entry/entry_64.S               |   12 -
 arch/x86/entry/entry_64_compat.S        |   21 --
 arch/x86/include/asm/signal.h           |    1 
 arch/x86/include/asm/thread_info.h      |    9 
 arch/x86/kernel/signal.c                |    2 
 arch/x86/kvm/x86.c                      |   17 -
 b/arch/arm64/include/asm/entry-common.h |   76 +++++++
 b/arch/x86/include/asm/entry-common.h   |  104 ++++++++++
 b/include/linux/entry-common.h          |  324 ++++++++++++++++++++++++++++++++
 b/kernel/entry/common.c                 |  220 +++++++++++++++++++++
 kernel/Makefile                         |    1 
 22 files changed, 776 insertions(+), 475 deletions(-)



             reply index

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-19 15:03 Thomas Gleixner [this message]
2019-09-19 15:03 ` [RFC patch 01/15] entry: Provide generic syscall entry functionality Thomas Gleixner
2019-09-20 23:38   ` Andy Lutomirski
2019-10-20 11:49     ` Thomas Gleixner
2019-09-23  9:05   ` Mike Rapoport
2019-09-19 15:03 ` [RFC patch 02/15] x86/entry: Remove _TIF_NOHZ from _TIF_WORK_SYSCALL_ENTRY Thomas Gleixner
2019-09-20 23:39   ` Andy Lutomirski
2019-09-23 20:43     ` Thomas Gleixner
2019-09-19 15:03 ` [RFC patch 03/15] x86/entry: Use generic syscall entry function Thomas Gleixner
2019-09-20 23:41   ` Andy Lutomirski
2019-09-23  8:31     ` Peter Zijlstra
2019-09-23  8:40       ` Thomas Gleixner
2019-09-19 15:03 ` [RFC patch 04/15] arm64/entry: " Thomas Gleixner
2019-09-20 12:21   ` Catalin Marinas
2019-09-19 15:03 ` [RFC patch 05/15] entry: Provide generic syscall exit function Thomas Gleixner
2019-09-19 15:03 ` [RFC patch 06/15] x86/entry: Use generic syscall exit functionality Thomas Gleixner
2019-09-19 15:03 ` [RFC patch 07/15] arm64/syscall: Remove obscure flag check Thomas Gleixner
2019-09-20 14:29   ` Catalin Marinas
2019-09-19 15:03 ` [RFC patch 08/15] arm64/syscall: Use generic syscall exit functionality Thomas Gleixner
2019-09-19 15:03 ` [RFC patch 09/15] entry: Provide generic exit to usermode functionality Thomas Gleixner
2019-09-23  8:30   ` Peter Zijlstra
2019-09-19 15:03 ` [RFC patch 10/15] x86/entry: Move irq tracing to C code Thomas Gleixner
2019-09-23  8:47   ` Peter Zijlstra
2019-09-23 10:27     ` Thomas Gleixner
2019-09-23 11:49       ` Peter Zijlstra
2019-09-23 11:55         ` Peter Zijlstra
2019-09-23 12:10           ` Peter Zijlstra
2019-09-23 17:24             ` Andy Lutomirski
2019-09-26  2:59   ` Josh Poimboeuf
2019-09-19 15:03 ` [RFC patch 11/15] x86/entry: Use generic exit to usermode Thomas Gleixner
2019-09-19 15:03 ` [RFC patch 12/15] arm64/entry: " Thomas Gleixner
2019-09-19 15:03 ` [RFC patch 13/15] arm64/entry: Move FPU restore out of exit_to_usermode() loop Thomas Gleixner
2019-09-19 15:03 ` [RFC patch 14/15] workpending: Provide infrastructure for work before entering a guest Thomas Gleixner
2019-09-19 15:40   ` Paolo Bonzini
2019-09-20 11:48     ` Thomas Gleixner
2019-09-23 18:17   ` Andy Lutomirski
2019-09-26 11:35   ` Miroslav Benes
2019-09-19 15:03 ` [RFC patch 15/15] x86/kvm: Use GENERIC_EXIT_WORKPENDING Thomas Gleixner
2019-09-19 15:40   ` Paolo Bonzini
2019-09-20 15:12 ` [RFC patch 00/15] entry: Provide generic implementation for host and guest entry/exit work Mark Rutland
2019-09-23 20:50   ` Thomas Gleixner
2019-09-23 18:18 ` Andy Lutomirski
2019-09-24  6:50 ` Christian Borntraeger

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