From patchwork Mon Feb 24 23:37:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gibson X-Patchwork-Id: 11402179 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 CDA2F138D for ; Mon, 24 Feb 2020 23:43:53 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A3E332084E for ; Mon, 24 Feb 2020 23:43:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="Pfh6D2b/" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A3E332084E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:46214 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j6NOC-0002eY-Qc for patchwork-qemu-devel@patchwork.kernel.org; Mon, 24 Feb 2020 18:43:52 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:47300) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j6NIR-0006cw-UL for qemu-devel@nongnu.org; Mon, 24 Feb 2020 18:37:57 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j6NIQ-0008B0-Fj for qemu-devel@nongnu.org; Mon, 24 Feb 2020 18:37:55 -0500 Received: from ozlabs.org ([2401:3900:2:1::2]:58809) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1j6NIQ-00087b-46; Mon, 24 Feb 2020 18:37:54 -0500 Received: by ozlabs.org (Postfix, from userid 1007) id 48RJQ6596pz9sSX; Tue, 25 Feb 2020 10:37:33 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1582587454; bh=2HMMcHS71SZcl1mdEZbUO8BqzSboB4TqxyWpdz2JwgM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Pfh6D2b/hCpTqdbe2xOgLDE1NoGtFr4CAZgf0QxMb3Q7KW65rTdeTtxxcbTxob/UK G8g9SIEomasRU+4kCF661JpmUjnHKv+qlUeBLLWzYGaAjto9xKbqOwHj6OXP69UMHL pFNofn+Ijb9IE0SM+go0J902hUzDr7wBb/B90SNI= From: David Gibson To: groug@kaod.org, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, clg@kaod.org Subject: [PATCH v6 17/18] spapr: Clean up RMA size calculation Date: Tue, 25 Feb 2020 10:37:23 +1100 Message-Id: <20200224233724.46415-18-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200224233724.46415-1-david@gibson.dropbear.id.au> References: <20200224233724.46415-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2401:3900:2:1::2 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lvivier@redhat.com, Thomas Huth , Xiao Guangrong , "Michael S. Tsirkin" , aik@ozlabs.ru, farosas@linux.ibm.com, Mark Cave-Ayland , Igor Mammedov , paulus@samba.org, Paolo Bonzini , "Edgar E. Iglesias" , David Gibson Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Move the calculation of the Real Mode Area (RMA) size into a helper function. While we're there clean it up and correct it in a few ways: * Add comments making it clearer where the various constraints come from * Remove a pointless check that the RMA fits within Node 0 (we've just clamped it so that it does) Signed-off-by: David Gibson --- hw/ppc/spapr.c | 59 ++++++++++++++++++++++++++++++-------------------- 1 file changed, 35 insertions(+), 24 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 6e9f15f64d..f0354b699d 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2648,6 +2648,40 @@ static PCIHostState *spapr_create_default_phb(void) return PCI_HOST_BRIDGE(dev); } +static hwaddr spapr_rma_size(SpaprMachineState *spapr, Error **errp) +{ + MachineState *machine = MACHINE(spapr); + hwaddr rma_size = machine->ram_size; + hwaddr node0_size = spapr_node0_size(machine); + + /* RMA has to fit in the first NUMA node */ + rma_size = MIN(rma_size, node0_size); + + /* + * VRMA access is via a special 1TiB SLB mapping, so the RMA can + * never exceed that + */ + rma_size = MIN(rma_size, TiB); + + /* + * Clamp the RMA size based on machine type. This is for + * migration compatibility with older qemu versions, which limited + * the RMA size for complicated and mostly bad reasons. + */ + if (smc->rma_limit) { + spapr->rma_size = MIN(spapr->rma_size, smc->rma_limit); + } + + if (rma_size < (MIN_RMA_SLOF * MiB)) { + error_setg(errp, +"pSeries SLOF firmware requires >= %ldMiB guest RMA (Real Mode Area)", + MIN_RMA_SLOF); + return -1; + } + + return rma_size; +} + /* pSeries LPAR / sPAPR hardware init */ static void spapr_machine_init(MachineState *machine) { @@ -2660,7 +2694,6 @@ static void spapr_machine_init(MachineState *machine) int i; MemoryRegion *sysmem = get_system_memory(); MemoryRegion *ram = g_new(MemoryRegion, 1); - hwaddr node0_size = spapr_node0_size(machine); long load_limit, fw_size; char *filename; Error *resize_hpt_err = NULL; @@ -2700,22 +2733,7 @@ static void spapr_machine_init(MachineState *machine) exit(1); } - spapr->rma_size = node0_size; - - /* - * Clamp the RMA size based on machine type. This is for - * migration compatibility with older qemu versions, which limited - * the RMA size for complicated and mostly bad reasons. - */ - if (smc->rma_limit) { - spapr->rma_size = MIN(spapr->rma_size, smc->rma_limit); - } - - if (spapr->rma_size > node0_size) { - error_report("Numa node 0 has to span the RMA (%#08"HWADDR_PRIx")", - spapr->rma_size); - exit(1); - } + spapr->rma_size = spapr_rma_size(spapr, &error_fatal); /* Setup a load limit for the ramdisk leaving room for SLOF and FDT */ load_limit = MIN(spapr->rma_size, RTAS_MAX_ADDR) - FW_OVERHEAD; @@ -2954,13 +2972,6 @@ static void spapr_machine_init(MachineState *machine) } } - if (spapr->rma_size < MIN_RMA_SLOF) { - error_report( - "pSeries SLOF firmware requires >= %ldMiB guest RMA (Real Mode Area memory)", - MIN_RMA_SLOF / MiB); - exit(1); - } - if (kernel_filename) { uint64_t lowaddr = 0;