From patchwork Fri Apr 14 23:44:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 13212086 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9B5BEC77B7C for ; Fri, 14 Apr 2023 23:44:54 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.521285.809885 (Exim 4.92) (envelope-from ) id 1pnT5x-0006kf-Gk; Fri, 14 Apr 2023 23:44:45 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 521285.809885; Fri, 14 Apr 2023 23:44:45 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pnT5w-0006jJ-Sf; Fri, 14 Apr 2023 23:44:44 +0000 Received: by outflank-mailman (input) for mailman id 521285; Fri, 14 Apr 2023 23:44:43 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pnT5v-0000zb-Cg for xen-devel@lists.xenproject.org; Fri, 14 Apr 2023 23:44:43 +0000 Received: from galois.linutronix.de (galois.linutronix.de [193.142.43.55]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 53a62147-db1e-11ed-8611-37d641c3527e; Sat, 15 Apr 2023 01:44:41 +0200 (CEST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 53a62147-db1e-11ed-8611-37d641c3527e Message-ID: <20230414232310.256412375@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1681515881; 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=e1FMo66EmKhD6c9vNMbCMEr10b7nb30z1HTBJhSwsws=; b=gZ0HEhv3acCl5QBYyuBxsWswUfiT2pTSEiPx8KAuYf607AwMRXvsLBlYW5dljp8oWs/ntm Rl62blc06B+wdYag6mxiaHF4d6UazbaaiGafHMeetJ/A7Hs5RVhUzMngs/dEe59idC0O2F aA4jOVKszqOh4s2mn+PKplYpnPle5vYAOnMKw27lKXhJvIh/kbhLy4lRj7cXXA/G581Bej PsarGBYF6AEmBjKJMVj8L9q7SGw5rle2qMtTuVh6V6kezaC/bwaovVLX9d1Zsm+GX8ANmu PhMCi/IYxY/Oqm30JTDcZDBgs/Y7EGdHwcz8miDR/Arr0Wrr//IGKwmjd5YAMQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1681515881; 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=e1FMo66EmKhD6c9vNMbCMEr10b7nb30z1HTBJhSwsws=; b=4fNwIQeLJaYUXs5/LQAEGEGLbWkObI//eYOHt1swXrTx799wwKeZFlTzry5MJCiAr70s7q ypFOiCNeSLElyzBg== 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 , Juergen Gross , Boris Ostrovsky , xen-devel@lists.xenproject.org, David Woodhouse , Usama Arif , 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 Subject: [patch 17/37] x86/xen/hvm: Get rid of DEAD_FROZEN handling References: <20230414225551.858160935@linutronix.de> MIME-Version: 1.0 Date: Sat, 15 Apr 2023 01:44:41 +0200 (CEST) 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);