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GET /api/patches/811527/?format=api
{ "id": 811527, "url": "http://patchwork.ozlabs.org/api/patches/811527/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20170908103558.31632-19-david@gibson.dropbear.id.au/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20170908103558.31632-19-david@gibson.dropbear.id.au>", "list_archive_url": null, "date": "2017-09-08T10:35:36", "name": "[PULL,18/40] booke206: fix tlbnps for fixed size TLB", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c2cde7abf010537a8a7c3e271c5017ba7aca5ac9", "submitter": { "id": 47, "url": "http://patchwork.ozlabs.org/api/people/47/?format=api", "name": "David Gibson", "email": "david@gibson.dropbear.id.au" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20170908103558.31632-19-david@gibson.dropbear.id.au/mbox/", "series": [ { "id": 2179, "url": "http://patchwork.ozlabs.org/api/series/2179/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=2179", "date": "2017-09-08T10:35:20", "name": "[PULL,01/40] hw/ppc/spapr_drc.c: change spapr_drc_needed to use drc->dev", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/2179/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/811527/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/811527/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@bilbo.ozlabs.org", "Authentication-Results": [ "ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=<UNKNOWN>)", "ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=gibson.dropbear.id.au\n\theader.i=@gibson.dropbear.id.au header.b=\"FaBqhYcA\"; \n\tdkim-atps=neutral" ], "Received": [ "from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xpZ9r26GJz9s81\n\tfor <incoming@patchwork.ozlabs.org>;\n\tFri, 8 Sep 2017 21:00:48 +1000 (AEST)", "from localhost ([::1]:44564 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>)\n\tid 1dqH1h-0006gw-Hl\n\tfor incoming@patchwork.ozlabs.org; Fri, 08 Sep 2017 07:00:45 -0400", "from eggs.gnu.org ([2001:4830:134:3::10]:58668)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from <dgibson@ozlabs.org>) id 1dqGe5-00028i-AG\n\tfor qemu-devel@nongnu.org; Fri, 08 Sep 2017 06:36:29 -0400", "from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from <dgibson@ozlabs.org>) id 1dqGe0-0003EJ-F5\n\tfor qemu-devel@nongnu.org; Fri, 08 Sep 2017 06:36:21 -0400", "from ozlabs.org ([2401:3900:2:1::2]:54369)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from <dgibson@ozlabs.org>)\n\tid 1dqGe0-0003Bn-02; Fri, 08 Sep 2017 06:36:16 -0400", "by ozlabs.org (Postfix, from userid 1007)\n\tid 3xpYdL5f8wz9t4c; Fri, 8 Sep 2017 20:36:04 +1000 (AEST)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple;\n\td=gibson.dropbear.id.au; s=201602; t=1504866966;\n\tbh=08F7meoLgnirL0dn0DGt7ZuONGT7wTakwVjKuIjq5Wg=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=FaBqhYcAh0tyJz2J8lT/Al3TXMtlN0ikeCVvvs8LhrIeY9UcdlsemuU+DYD/dGGFv\n\tOjCLIjYXdpwdcKD5WWGITX8nU9F5d7wKzkKJ6ggRbyIXKRjjSRENjtRbtgBKGKINAF\n\t6VvaZBAwkvoLM9lkPzxb0I1cQfPISOKJmxD4aQWY=", "From": "David Gibson <david@gibson.dropbear.id.au>", "To": "peter.maydell@linaro.org", "Date": "Fri, 8 Sep 2017 20:35:36 +1000", "Message-Id": "<20170908103558.31632-19-david@gibson.dropbear.id.au>", "X-Mailer": "git-send-email 2.13.5", "In-Reply-To": "<20170908103558.31632-1-david@gibson.dropbear.id.au>", "References": "<20170908103558.31632-1-david@gibson.dropbear.id.au>", "X-detected-operating-system": "by eggs.gnu.org: Genre and OS details not\n\trecognized.", "X-Received-From": "2401:3900:2:1::2", "Subject": "[Qemu-devel] [PULL 18/40] booke206: fix tlbnps for fixed size TLB", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.21", "Precedence": "list", "List-Id": "<qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n\t<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<http://lists.nongnu.org/archive/html/qemu-devel/>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n\t<mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Cc": "qemu-devel@nongnu.org, aik@ozlabs.ru, agraf@suse.de,\n\tmdroth@linux.vnet.ibm.com,\n\tKONRAD Frederic <frederic.konrad@adacore.com>, \n\tqemu-ppc@nongnu.org, imammedo@redhat.com, sam.bobroff@au1.ibm.com,\n\tDavid Gibson <david@gibson.dropbear.id.au>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "\"Qemu-devel\"\n\t<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>" }, "content": "From: KONRAD Frederic <frederic.konrad@adacore.com>\n\nSome OS don't populate the TSIZE field when using a fixed size TLB which result\nin a 1KB TLB. When the TLB is a fixed size TLB the TSIZE field should be\nignored.\n\nFix this wrong behavior with MAV 2.0.\n\nSigned-off-by: KONRAD Frederic <frederic.konrad@adacore.com>\nSigned-off-by: David Gibson <david@gibson.dropbear.id.au>\n---\n target/ppc/cpu.h | 22 ++++++++++++++++++++++\n target/ppc/mmu_helper.c | 16 ++++++++++------\n 2 files changed, 32 insertions(+), 6 deletions(-)", "diff": "diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h\nindex 21f0ddd056..042372c5ad 100644\n--- a/target/ppc/cpu.h\n+++ b/target/ppc/cpu.h\n@@ -2491,6 +2491,28 @@ static inline uint32_t booke206_tlbnps(CPUPPCState *env, const int tlbn)\n return ret;\n }\n \n+static inline void booke206_fixed_size_tlbn(CPUPPCState *env, const int tlbn,\n+ ppcmas_tlb_t *tlb)\n+{\n+ uint8_t i;\n+ int32_t tsize = -1;\n+\n+ for (i = 0; i < 32; i++) {\n+ if ((env->spr[SPR_BOOKE_TLB0PS + tlbn]) & (1ULL << i)) {\n+ if (tsize == -1) {\n+ tsize = i;\n+ } else {\n+ return;\n+ }\n+ }\n+ }\n+\n+ /* TLBnPS unimplemented? Odd.. */\n+ assert(tsize != -1);\n+ tlb->mas1 &= ~MAS1_TSIZE_MASK;\n+ tlb->mas1 |= ((uint32_t)tsize) << MAS1_TSIZE_SHIFT;\n+}\n+\n #endif\n \n static inline bool msr_is_64bit(CPUPPCState *env, target_ulong msr)\ndiff --git a/target/ppc/mmu_helper.c b/target/ppc/mmu_helper.c\nindex f06b9382b4..2a1f9902c9 100644\n--- a/target/ppc/mmu_helper.c\n+++ b/target/ppc/mmu_helper.c\n@@ -2632,12 +2632,16 @@ void helper_booke206_tlbwe(CPUPPCState *env)\n env->spr[SPR_BOOKE_MAS3];\n tlb->mas1 = env->spr[SPR_BOOKE_MAS1];\n \n- /* MAV 1.0 only */\n- if (!(tlbncfg & TLBnCFG_AVAIL)) {\n- /* force !AVAIL TLB entries to correct page size */\n- tlb->mas1 &= ~MAS1_TSIZE_MASK;\n- /* XXX can be configured in MMUCSR0 */\n- tlb->mas1 |= (tlbncfg & TLBnCFG_MINSIZE) >> 12;\n+ if ((env->spr[SPR_MMUCFG] & MMUCFG_MAVN) == MMUCFG_MAVN_V2) {\n+ /* For TLB which has a fixed size TSIZE is ignored with MAV2 */\n+ booke206_fixed_size_tlbn(env, tlbn, tlb);\n+ } else {\n+ if (!(tlbncfg & TLBnCFG_AVAIL)) {\n+ /* force !AVAIL TLB entries to correct page size */\n+ tlb->mas1 &= ~MAS1_TSIZE_MASK;\n+ /* XXX can be configured in MMUCSR0 */\n+ tlb->mas1 |= (tlbncfg & TLBnCFG_MINSIZE) >> 12;\n+ }\n }\n \n /* Make a mask from TLB size to discard invalid bits in EPN field */\n", "prefixes": [ "PULL", "18/40" ] }