From patchwork Thu May 4 19:02:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 13231519 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2915AC7EE2C for ; Thu, 4 May 2023 19:03:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230248AbjEDTDt (ORCPT ); Thu, 4 May 2023 15:03:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51432 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230097AbjEDTDR (ORCPT ); Thu, 4 May 2023 15:03:17 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 19D659EC6; Thu, 4 May 2023 12:02:36 -0700 (PDT) Message-ID: <20230504185937.257347750@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1683226946; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=7K79vzHgMUP9R0A/9c85ZFgwBToV4EA8CXJkDqIYiAA=; b=UC7UBpzkmxaEWM2nz/Qw6Vjvrnn6fWsNM/KnljWxV7HMtz5u7vnaAfODd1M7vTr5ktTb20 nVojYUScHcp2OqOxJ8IqsoIvsDu/7IdzIUdDuRTyFO8wPuGlIHpnfYJUn5p8bx3AiClEX1 fRskIOaKRFHPshjjQegmMKxWZJiKU/W1wNR+46su4jgsn/9Va0iMm7QqwA01siEqX7wCZg cW+AbT9hwgRm2RTXxGoRlf6T+Y7L4Mnn/bxe5uXiXqUdghVOxD2GUZ9J1ZZ4wpm572Kggb lAqMgDTfSLuvpAL4aW6s90BbYxngLSPUP8QvW4PAuFXJ0OZBFaKLB/9XRIX9dw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1683226946; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=7K79vzHgMUP9R0A/9c85ZFgwBToV4EA8CXJkDqIYiAA=; b=y1BzbUsMle0wpOLNE2p2p2IO/b5quxM8T3suQns4J8s0UcXtZFuk8jCSoUG3pH8YtIQT2K ezemL9386MNKclAg== From: Thomas Gleixner To: LKML Cc: x86@kernel.org, David Woodhouse , Andrew Cooper , Brian Gerst , Arjan van de Veen , Paolo Bonzini , Paul McKenney , Tom Lendacky , Sean Christopherson , Oleksandr Natalenko , Paul Menzel , "Guilherme G. Piccoli" , Piotr Gorski , Usama Arif , Juergen Gross , Boris Ostrovsky , xen-devel@lists.xenproject.org, Russell King , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, Catalin Marinas , Will Deacon , Guo Ren , linux-csky@vger.kernel.org, Thomas Bogendoerfer , linux-mips@vger.kernel.org, "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, Paul Walmsley , Palmer Dabbelt , linux-riscv@lists.infradead.org, Mark Rutland , Sabin Rapan , "Michael Kelley (LINUX)" Subject: [patch V2 17/38] x86/xen/hvm: Get rid of DEAD_FROZEN handling References: <20230504185733.126511787@linutronix.de> MIME-Version: 1.0 Date: Thu, 4 May 2023 21:02:25 +0200 (CEST) Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org From: Thomas Gleixner No point in this conditional voodoo. Un-initializing the lock mechanism is safe to be called unconditionally even if it was already invoked when the CPU died. Remove the invocation of xen_smp_intr_free() as that has been already cleaned up in xen_cpu_dead_hvm(). Signed-off-by: Thomas Gleixner Cc: Juergen Gross Cc: Boris Ostrovsky Cc: xen-devel@lists.xenproject.org --- arch/x86/xen/enlighten_hvm.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) --- --- a/arch/x86/xen/enlighten_hvm.c +++ b/arch/x86/xen/enlighten_hvm.c @@ -161,13 +161,12 @@ static int xen_cpu_up_prepare_hvm(unsign int rc = 0; /* - * This can happen if CPU was offlined earlier and - * offlining timed out in common_cpu_die(). + * If a CPU was offlined earlier and offlining timed out then the + * lock mechanism is still initialized. Uninit it unconditionally + * as it's safe to call even if already uninited. Interrupts and + * timer have already been handled in xen_cpu_dead_hvm(). */ - if (cpu_report_state(cpu) == CPU_DEAD_FROZEN) { - xen_smp_intr_free(cpu); - xen_uninit_lock_cpu(cpu); - } + xen_uninit_lock_cpu(cpu); if (cpu_acpi_id(cpu) != U32_MAX) per_cpu(xen_vcpu_id, cpu) = cpu_acpi_id(cpu);