From patchwork Wed May 4 06:52:19 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Kardashevskiy X-Patchwork-Id: 9011341 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5B74EBF29F for ; Wed, 4 May 2016 07:23:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 972F12027D for ; Wed, 4 May 2016 07:23:27 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7C39E2026F for ; Wed, 4 May 2016 07:23:26 +0000 (UTC) Received: from localhost ([::1]:46130 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1axr9W-0000Wk-1T for patchwork-qemu-devel@patchwork.kernel.org; Wed, 04 May 2016 03:23:22 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40094) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1axr9J-0000HM-NP for qemu-devel@nongnu.org; Wed, 04 May 2016 03:23:16 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1axr92-0005Iv-8D for qemu-devel@nongnu.org; Wed, 04 May 2016 03:23:04 -0400 Received: from e23smtp03.au.ibm.com ([202.81.31.145]:35164) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1axr91-0005EW-MD for qemu-devel@nongnu.org; Wed, 04 May 2016 03:22:52 -0400 Received: from localhost by e23smtp03.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 4 May 2016 17:22:30 +1000 X-IBM-Helo: d23dlp02.au.ibm.com X-IBM-MailFrom: aik@ozlabs.ru X-IBM-RcptTo: qemu-devel@nongnu.org;qemu-ppc@nongnu.org Received: from d23relay09.au.ibm.com (d23relay09.au.ibm.com [9.185.63.181]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id DF4C42BB006D; Wed, 4 May 2016 17:21:23 +1000 (EST) Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay09.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u447L5G750593972; Wed, 4 May 2016 17:21:13 +1000 Received: from d23av03.au.ibm.com (localhost [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u447JjOT002555; Wed, 4 May 2016 17:19:45 +1000 Received: from ozlabs.au.ibm.com (ozlabs.au.ibm.com [9.192.253.14]) by d23av03.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u447JjGv001115; Wed, 4 May 2016 17:19:45 +1000 Received: from bran.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) by ozlabs.au.ibm.com (Postfix) with ESMTP id 2A1A0A039A; Wed, 4 May 2016 16:52:36 +1000 (AEST) Received: from vpl2.ozlabs.ibm.com (vpl2.ozlabs.ibm.com [10.61.141.27]) by bran.ozlabs.ibm.com (Postfix) with ESMTP id 17B7CE3A49; Wed, 4 May 2016 16:52:36 +1000 (AEST) From: Alexey Kardashevskiy To: qemu-devel@nongnu.org Date: Wed, 4 May 2016 16:52:19 +1000 Message-Id: <1462344751-28281-8-git-send-email-aik@ozlabs.ru> X-Mailer: git-send-email 2.5.0.rc3 In-Reply-To: <1462344751-28281-1-git-send-email-aik@ozlabs.ru> References: <1462344751-28281-1-git-send-email-aik@ozlabs.ru> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16050407-0009-0000-0000-0000070D840B X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 202.81.31.145 Subject: [Qemu-devel] [PATCH qemu v16 07/19] spapr_iommu: Move table allocation to helpers X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexey Kardashevskiy , Alexander Graf , Alex Williamson , qemu-ppc@nongnu.org, Paolo Bonzini , David Gibson Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP At the moment presence of vfio-pci devices on a bus affect the way the guest view table is allocated. If there is no vfio-pci on a PHB and the host kernel supports KVM acceleration of H_PUT_TCE, a table is allocated in KVM. However, if there is vfio-pci and we do yet not KVM acceleration for these, the table has to be allocated by the userspace. At the moment the table is allocated once at boot time but next patches will reallocate it. This moves kvmppc_create_spapr_tce/g_malloc0 and their counterparts to helpers. Signed-off-by: Alexey Kardashevskiy Reviewed-by: David Gibson --- hw/ppc/spapr_iommu.c | 58 +++++++++++++++++++++++++++++++++++----------------- trace-events | 2 +- 2 files changed, 40 insertions(+), 20 deletions(-) diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c index 277f289..8132f64 100644 --- a/hw/ppc/spapr_iommu.c +++ b/hw/ppc/spapr_iommu.c @@ -75,6 +75,37 @@ static IOMMUAccessFlags spapr_tce_iommu_access_flags(uint64_t tce) } } +static uint64_t *spapr_tce_alloc_table(uint32_t liobn, + uint32_t page_shift, + uint32_t nb_table, + int *fd, + bool need_vfio) +{ + uint64_t *table = NULL; + uint64_t window_size = (uint64_t)nb_table << page_shift; + + if (kvm_enabled() && !(window_size >> 32)) { + table = kvmppc_create_spapr_tce(liobn, window_size, fd, need_vfio); + } + + if (!table) { + *fd = -1; + table = g_malloc0(nb_table * sizeof(uint64_t)); + } + + trace_spapr_iommu_new_table(liobn, table, *fd); + + return table; +} + +static void spapr_tce_free_table(uint64_t *table, int fd, uint32_t nb_table) +{ + if (!kvm_enabled() || + (kvmppc_remove_spapr_tce(table, fd, nb_table) != 0)) { + g_free(table); + } +} + /* Called from RCU critical section */ static IOMMUTLBEntry spapr_tce_translate_iommu(MemoryRegion *iommu, hwaddr addr, bool is_write) @@ -141,21 +172,13 @@ static MemoryRegionIOMMUOps spapr_iommu_ops = { static int spapr_tce_table_realize(DeviceState *dev) { sPAPRTCETable *tcet = SPAPR_TCE_TABLE(dev); - uint64_t window_size = (uint64_t)tcet->nb_table << tcet->page_shift; - if (kvm_enabled() && !(window_size >> 32)) { - tcet->table = kvmppc_create_spapr_tce(tcet->liobn, - window_size, - &tcet->fd, - tcet->need_vfio); - } - - if (!tcet->table) { - size_t table_size = tcet->nb_table * sizeof(uint64_t); - tcet->table = g_malloc0(table_size); - } - - trace_spapr_iommu_new_table(tcet->liobn, tcet, tcet->table, tcet->fd); + tcet->fd = -1; + tcet->table = spapr_tce_alloc_table(tcet->liobn, + tcet->page_shift, + tcet->nb_table, + &tcet->fd, + tcet->need_vfio); memory_region_init_iommu(&tcet->iommu, OBJECT(dev), &spapr_iommu_ops, "iommu-spapr", @@ -241,11 +264,8 @@ static void spapr_tce_table_unrealize(DeviceState *dev, Error **errp) QLIST_REMOVE(tcet, list); - if (!kvm_enabled() || - (kvmppc_remove_spapr_tce(tcet->table, tcet->fd, - tcet->nb_table) != 0)) { - g_free(tcet->table); - } + spapr_tce_free_table(tcet->table, tcet->fd, tcet->nb_table); + tcet->fd = -1; } MemoryRegion *spapr_tce_get_iommu(sPAPRTCETable *tcet) diff --git a/trace-events b/trace-events index 8350743..d96d344 100644 --- a/trace-events +++ b/trace-events @@ -1431,7 +1431,7 @@ spapr_iommu_pci_get(uint64_t liobn, uint64_t ioba, uint64_t ret, uint64_t tce) " spapr_iommu_pci_indirect(uint64_t liobn, uint64_t ioba, uint64_t tce, uint64_t iobaN, uint64_t tceN, uint64_t ret) "liobn=%"PRIx64" ioba=0x%"PRIx64" tcelist=0x%"PRIx64" iobaN=0x%"PRIx64" tceN=0x%"PRIx64" ret=%"PRId64 spapr_iommu_pci_stuff(uint64_t liobn, uint64_t ioba, uint64_t tce_value, uint64_t npages, uint64_t ret) "liobn=%"PRIx64" ioba=0x%"PRIx64" tcevalue=0x%"PRIx64" npages=%"PRId64" ret=%"PRId64 spapr_iommu_xlate(uint64_t liobn, uint64_t ioba, uint64_t tce, unsigned perm, unsigned pgsize) "liobn=%"PRIx64" 0x%"PRIx64" -> 0x%"PRIx64" perm=%u mask=%x" -spapr_iommu_new_table(uint64_t liobn, void *tcet, void *table, int fd) "liobn=%"PRIx64" tcet=%p table=%p fd=%d" +spapr_iommu_new_table(uint64_t liobn, void *table, int fd) "liobn=%"PRIx64" table=%p fd=%d" # hw/ppc/ppc.c ppc_tb_adjust(uint64_t offs1, uint64_t offs2, int64_t diff, int64_t seconds) "adjusted from 0x%"PRIx64" to 0x%"PRIx64", diff %"PRId64" (%"PRId64"s)"