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>, Will Deacon <will@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
kvm@vger.kernel.org, linux-arch@vger.kernel.org,
Mike Rapoport <rppt@linux.ibm.com>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Miroslav Benes <mbenes@suse.cz>
Subject: [patch V2 00/17] entry: Provide generic implementation for host and guest entry/exit work
Date: Wed, 23 Oct 2019 14:27:05 +0200 [thread overview]
Message-ID: <20191023122705.198339581@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
The series implements the syscall enter/exit and the general exit to
userspace work handling along with the pre guest enter functionality.
Changes vs. RFC version:
- Dropped ARM64 conversion as requested by ARM64 folks
- Addressed various review comments (Peter, Andy, Mike, Paolo, Josh,
Miroslav)
- Picked up, fixed and completed Peter's patch which makes interrupt
enable/disable symmetric in trap handlers
- Completed the removal of irq disabling / irq tracing from low level
ASM code
- Moved KVM specific parts of the enter guest mode handling to KVM
(Paolo)
The series is also available from git:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP/core.entry
Thanks,
tglx
RFC version: https://lore.kernel.org/r/20190919150314.054351477@linutronix.de
---
/Makefile | 3
arch/Kconfig | 3
arch/x86/Kconfig | 1
arch/x86/entry/calling.h | 12 +
arch/x86/entry/common.c | 264 ++------------------------------
arch/x86/entry/entry_32.S | 41 ----
arch/x86/entry/entry_64.S | 32 ---
arch/x86/entry/entry_64_compat.S | 30 ---
arch/x86/include/asm/irqflags.h | 8
arch/x86/include/asm/paravirt.h | 9 -
arch/x86/include/asm/signal.h | 1
arch/x86/include/asm/thread_info.h | 9 -
arch/x86/kernel/signal.c | 2
arch/x86/kernel/traps.c | 33 ++--
arch/x86/kvm/x86.c | 17 --
arch/x86/mm/fault.c | 7
b/arch/x86/include/asm/entry-common.h | 104 ++++++++++++
b/arch/x86/kvm/Kconfig | 1
b/include/linux/entry-common.h | 280 ++++++++++++++++++++++++++++++++++
b/kernel/entry/common.c | 184 ++++++++++++++++++++++
include/linux/kvm_host.h | 64 +++++++
kernel/Makefile | 1
virt/kvm/Kconfig | 3
23 files changed, 735 insertions(+), 374 deletions(-)
next reply other threads:[~2019-10-23 12:27 UTC|newest]
Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-23 12:27 Thomas Gleixner [this message]
2019-10-23 12:27 ` [patch V2 00/17] entry: Provide generic implementation for host and guest entry/exit work Thomas Gleixner
2019-10-23 12:27 ` [patch V2 01/17] x86/entry/32: Remove unused resume_userspace label Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 13:43 ` Sean Christopherson
2019-10-23 13:43 ` Sean Christopherson
2019-11-06 15:26 ` Alexandre Chartre
2019-11-06 15:26 ` Alexandre Chartre
2019-10-23 12:27 ` [patch V2 02/17] x86/entry/64: Remove pointless jump in paranoid_exit Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 13:45 ` Sean Christopherson
2019-10-23 13:45 ` Sean Christopherson
2019-11-06 15:29 ` Alexandre Chartre
2019-11-06 15:29 ` Alexandre Chartre
2019-10-23 12:27 ` [patch V2 03/17] x86/traps: Remove pointless irq enable from do_spurious_interrupt_bug() Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 13:52 ` Sean Christopherson
2019-10-23 13:52 ` Sean Christopherson
2019-10-23 21:31 ` Josh Poimboeuf
2019-10-23 21:31 ` Josh Poimboeuf
2019-10-23 22:35 ` Thomas Gleixner
2019-10-23 22:35 ` Thomas Gleixner
2019-10-23 22:49 ` Josh Poimboeuf
2019-10-23 22:49 ` Josh Poimboeuf
2019-10-23 23:18 ` Thomas Gleixner
2019-10-23 23:18 ` Thomas Gleixner
2019-11-06 15:33 ` Alexandre Chartre
2019-11-06 15:33 ` Alexandre Chartre
2019-10-23 12:27 ` [patch V2 04/17] x86/entry: Make DEBUG_ENTRY_ASSERT_IRQS_OFF available for 32bit Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 14:16 ` Sean Christopherson
2019-10-23 14:16 ` Sean Christopherson
2019-11-06 15:50 ` Alexandre Chartre
2019-11-06 15:50 ` Alexandre Chartre
2019-10-23 12:27 ` [patch V2 05/17] x86/traps: Make interrupt enable/disable symmetric in C code Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 14:16 ` Sean Christopherson
2019-10-23 14:16 ` Sean Christopherson
2019-10-23 22:01 ` Josh Poimboeuf
2019-10-23 22:01 ` Josh Poimboeuf
2019-10-23 23:23 ` Thomas Gleixner
2019-10-23 23:23 ` Thomas Gleixner
2019-11-06 16:19 ` Alexandre Chartre
2019-11-06 16:19 ` Alexandre Chartre
2019-10-23 12:27 ` [patch V2 06/17] x86/entry/32: Remove redundant interrupt disable Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 14:17 ` Sean Christopherson
2019-10-23 14:17 ` Sean Christopherson
2019-11-08 10:41 ` Alexandre Chartre
2019-11-08 10:41 ` Alexandre Chartre
2019-10-23 12:27 ` [patch V2 07/17] x86/entry/64: " Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 14:20 ` Sean Christopherson
2019-10-23 14:20 ` Sean Christopherson
2019-10-23 22:06 ` Josh Poimboeuf
2019-10-23 22:06 ` Josh Poimboeuf
2019-10-23 23:52 ` Thomas Gleixner
2019-10-23 23:52 ` Thomas Gleixner
2019-10-24 16:18 ` Andy Lutomirski
2019-10-24 16:18 ` Andy Lutomirski
2019-10-24 20:52 ` Thomas Gleixner
2019-10-24 20:52 ` Thomas Gleixner
2019-10-24 20:59 ` Thomas Gleixner
2019-10-24 20:59 ` Thomas Gleixner
2019-10-24 21:21 ` Peter Zijlstra
2019-10-24 21:21 ` Peter Zijlstra
2019-10-24 21:24 ` Andy Lutomirski
2019-10-24 21:24 ` Andy Lutomirski
2019-10-24 22:33 ` Thomas Gleixner
2019-10-24 22:33 ` Thomas Gleixner
2019-11-08 11:07 ` Alexandre Chartre
2019-11-08 11:07 ` Alexandre Chartre
2019-10-23 12:27 ` [patch V2 08/17] x86/entry: Move syscall irq tracing to C code Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 21:30 ` Andy Lutomirski
2019-10-23 21:30 ` Andy Lutomirski
2019-10-23 21:35 ` Andy Lutomirski
2019-10-23 21:35 ` Andy Lutomirski
2019-10-23 23:31 ` Thomas Gleixner
2019-10-23 23:31 ` Thomas Gleixner
2019-10-23 23:16 ` Thomas Gleixner
2019-10-23 23:16 ` Thomas Gleixner
2019-10-24 16:24 ` Andy Lutomirski
2019-10-24 16:24 ` Andy Lutomirski
2019-10-24 17:40 ` Peter Zijlstra
2019-10-24 17:40 ` Peter Zijlstra
2019-10-24 20:54 ` Thomas Gleixner
2019-10-24 20:54 ` Thomas Gleixner
2019-10-23 12:27 ` [patch V2 09/17] x86/entry: Remove _TIF_NOHZ from _TIF_WORK_SYSCALL_ENTRY Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2020-01-06 4:11 ` Frederic Weisbecker
2020-01-06 4:11 ` Frederic Weisbecker
2019-10-23 12:27 ` [patch V2 10/17] entry: Provide generic syscall entry functionality Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 12:27 ` [patch V2 11/17] x86/entry: Use generic syscall entry function Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 12:27 ` [patch V2 12/17] entry: Provide generic syscall exit function Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 12:27 ` [patch V2 13/17] x86/entry: Use generic syscall exit functionality Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 12:27 ` [patch V2 14/17] entry: Provide generic exit to usermode functionality Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 21:34 ` Andy Lutomirski
2019-10-23 21:34 ` Andy Lutomirski
2019-10-23 23:20 ` Thomas Gleixner
2019-10-23 23:20 ` Thomas Gleixner
2019-10-23 12:27 ` [patch V2 15/17] x86/entry: Use generic exit to usermode Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 12:27 ` [patch V2 16/17] kvm/workpending: Provide infrastructure for work before entering a guest Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 14:55 ` Sean Christopherson
2019-10-23 14:55 ` Sean Christopherson
2019-10-23 12:27 ` [patch V2 17/17] x86/kvm: Use generic exit to guest work function Thomas Gleixner
2019-10-23 12:27 ` Thomas Gleixner
2019-10-23 14:48 ` Sean Christopherson
2019-10-23 14:48 ` Sean Christopherson
2019-10-23 14:37 ` [patch V2 00/17] entry: Provide generic implementation for host and guest entry/exit work Peter Zijlstra
2019-10-23 14:37 ` Peter Zijlstra
2019-10-23 21:20 ` Josh Poimboeuf
2019-10-23 21:20 ` Josh Poimboeuf
2019-10-29 11:28 ` Will Deacon
2019-10-29 11:28 ` Will Deacon
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