From patchwork Fri Sep 28 09:45:44 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Mackerras X-Patchwork-Id: 10619249 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5087915A6 for ; Fri, 28 Sep 2018 09:46:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 439E72AB2B for ; Fri, 28 Sep 2018 09:46:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 381342ACE2; Fri, 28 Sep 2018 09:46:26 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C81912AB2B for ; Fri, 28 Sep 2018 09:46:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729333AbeI1QJU (ORCPT ); Fri, 28 Sep 2018 12:09:20 -0400 Received: from ozlabs.org ([203.11.71.1]:32849 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729158AbeI1QJT (ORCPT ); Fri, 28 Sep 2018 12:09:19 -0400 Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPSA id 42M6JF5Ygjz9sjD; Fri, 28 Sep 2018 19:46:21 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=ozlabs.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ozlabs.org; s=201707; t=1538127981; bh=VO5KFNeHVbXIcs6X5rY3qfAsY7zEtJGU/nppBeKAghs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WWk7w2p1Su04lXxzvmfz6q1/54+Hxcmf6wmJuVVmzPX9+fnQreotFByAY92JW1h1J Kksl6kJa80aqgMlywy8tpcIkCTv4QThsdQTZoZq5HA8rXGOVQ81n9nTRo7NE8OVn3j JB5pwgF3wnSnxX1BRc56PRXnRdcweFiMbDGmL8FVVtlsZdXV38eJpAlG7O2emECKq/ 0CaV8xzOtiR/qeexywN05wwa3+MidRjx+sHOAM8XQZ7DCMlPAZp4O8wMToIEWSVOLW /Hgt5Ab7qjAp8eqcruNDGDkA9exFNrrsvCgek4GLvEbjvNpAsU52Mg0r+CVbtMdcJ5 wyM6LRvmwx9Xw== From: Paul Mackerras To: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org Cc: linuxppc-dev@ozlabs.org, David Gibson Subject: [PATCH v2 14/33] KVM: PPC: Book3S HV: Clear partition table entry on vm teardown Date: Fri, 28 Sep 2018 19:45:44 +1000 Message-Id: <1538127963-15645-15-git-send-email-paulus@ozlabs.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1538127963-15645-1-git-send-email-paulus@ozlabs.org> References: <1538127963-15645-1-git-send-email-paulus@ozlabs.org> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Suraj Jitindar Singh When destroying a VM we return the LPID to the pool, however we never zero the partition table entry. This is instead done when we reallocate the LPID. Zero the partition table entry on VM teardown before returning the LPID to the pool. This means if we were running as a nested hypervisor the real hypervisor could use this to determine when it can free resources. Reviewed-by: David Gibson Signed-off-by: Suraj Jitindar Singh Signed-off-by: Paul Mackerras --- arch/powerpc/kvm/book3s_hv.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 0ad5541..b8703be 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -4501,13 +4501,19 @@ static void kvmppc_core_destroy_vm_hv(struct kvm *kvm) kvmppc_free_vcores(kvm); - kvmppc_free_lpid(kvm->arch.lpid); if (kvm_is_radix(kvm)) kvmppc_free_radix(kvm); else kvmppc_free_hpt(&kvm->arch.hpt); + /* Perform global invalidation and return lpid to the pool */ + if (cpu_has_feature(CPU_FTR_ARCH_300)) { + kvm->arch.process_table = 0; + kvmppc_setup_partition_table(kvm); + } + kvmppc_free_lpid(kvm->arch.lpid); + kvmppc_free_pimap(kvm); }