From patchwork Thu Sep 19 15:03:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 11152799 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 03F981747 for ; Thu, 19 Sep 2019 15:11:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D11C921A49 for ; Thu, 19 Sep 2019 15:11:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389620AbfISPLQ (ORCPT ); Thu, 19 Sep 2019 11:11:16 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:50049 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728720AbfISPJu (ORCPT ); Thu, 19 Sep 2019 11:09:50 -0400 Received: from localhost ([127.0.0.1] helo=nanos.tec.linutronix.de) by Galois.linutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1iAy3w-0006n0-31; Thu, 19 Sep 2019 17:09:40 +0200 Message-Id: <20190919150314.054351477@linutronix.de> User-Agent: quilt/0.65 Date: Thu, 19 Sep 2019 17:03:14 +0200 From: Thomas Gleixner To: LKML Cc: x86@kernel.org, Peter Zijlstra , Andy Lutomirski , Catalin Marinas , Will Deacon , Mark Rutland , Marc Zyngier , Paolo Bonzini , 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 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org 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(-)