From patchwork Tue Jun 28 06:48:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?C=C3=A9dric_Le_Goater?= X-Patchwork-Id: 641379 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3rdxMN68hMz9sBl for ; Tue, 28 Jun 2016 16:52:48 +1000 (AEST) Received: from localhost ([::1]:34593 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bHmt4-0006Q6-Jc for incoming@patchwork.ozlabs.org; Tue, 28 Jun 2016 02:52:46 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57184) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bHmqh-0002fs-27 for qemu-devel@nongnu.org; Tue, 28 Jun 2016 02:51:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bHmpT-0004pJ-PV for qemu-devel@nongnu.org; Tue, 28 Jun 2016 02:50:18 -0400 Received: from 8.mo3.mail-out.ovh.net ([87.98.172.249]:54721) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bHmpT-0004ov-Dv for qemu-devel@nongnu.org; Tue, 28 Jun 2016 02:49:03 -0400 Received: from player772.ha.ovh.net (b7.ovh.net [213.186.33.57]) by mo3.mail-out.ovh.net (Postfix) with ESMTP id 4E4C0FF8F3D for ; Tue, 28 Jun 2016 08:49:02 +0200 (CEST) Received: from hermes.ibm.com (LFbn-1-2234-107.w90-76.abo.wanadoo.fr [90.76.55.107]) (Authenticated sender: clg@kaod.org) by player772.ha.ovh.net (Postfix) with ESMTPSA id ECB5A4C0083; Tue, 28 Jun 2016 08:48:56 +0200 (CEST) From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: David Gibson Date: Tue, 28 Jun 2016 08:48:34 +0200 Message-Id: <1467096514-18905-3-git-send-email-clg@kaod.org> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1467096514-18905-1-git-send-email-clg@kaod.org> References: <1467096514-18905-1-git-send-email-clg@kaod.org> MIME-Version: 1.0 X-Ovh-Tracer-Id: 2152157674140568550 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrfeeltddruddvgdduudegucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuqfggjfenuceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddm X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x (no timestamps) [generic] X-Received-From: 87.98.172.249 Subject: [Qemu-devel] [PATCH 2/2] ppc: Fix 64K pages support in full emulation 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: qemu-ppc@nongnu.org, qemu-devel@nongnu.org, Cedric Le Goater Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Benjamin Herrenschmidt We were always advertising only 4K & 16M. Additionally the code wasn't properly matching the page size with the PTE content, which meant we could potentially hit an incorrect PTE if the guest used multiple sizes. Finally, honor the CPU capabilities when decoding the size from the SLB so we don't try to use 64K pages on 970. This still doesn't add support for MPSS (Multiple Page Sizes per Segment) Signed-off-by: Benjamin Herrenschmidt [clg: fixed checkpatch.pl errors commits 61a36c9b5a12 and 1114e712c998 reworked the hpte code doing insertion/removal in hw/ppc/spapr_hcall.c. The hunks modifying these areas were removed. ] Signed-off-by: Cédric Le Goater --- target-ppc/cpu-qom.h | 3 +++ target-ppc/mmu-hash64.c | 39 +++++++++++++++++++++++++++++++++++---- target-ppc/translate_init.c | 22 +++++++++++++++++++--- 3 files changed, 57 insertions(+), 7 deletions(-) diff --git a/target-ppc/cpu-qom.h b/target-ppc/cpu-qom.h index 0fad2def0a94..286410502f6d 100644 --- a/target-ppc/cpu-qom.h +++ b/target-ppc/cpu-qom.h @@ -70,18 +70,21 @@ enum powerpc_mmu_t { #define POWERPC_MMU_64 0x00010000 #define POWERPC_MMU_1TSEG 0x00020000 #define POWERPC_MMU_AMR 0x00040000 +#define POWERPC_MMU_64K 0x00080000 /* 64 bits PowerPC MMU */ POWERPC_MMU_64B = POWERPC_MMU_64 | 0x00000001, /* Architecture 2.03 and later (has LPCR) */ POWERPC_MMU_2_03 = POWERPC_MMU_64 | 0x00000002, /* Architecture 2.06 variant */ POWERPC_MMU_2_06 = POWERPC_MMU_64 | POWERPC_MMU_1TSEG + | POWERPC_MMU_64K | POWERPC_MMU_AMR | 0x00000003, /* Architecture 2.06 "degraded" (no 1T segments) */ POWERPC_MMU_2_06a = POWERPC_MMU_64 | POWERPC_MMU_AMR | 0x00000003, /* Architecture 2.07 variant */ POWERPC_MMU_2_07 = POWERPC_MMU_64 | POWERPC_MMU_1TSEG + | POWERPC_MMU_64K | POWERPC_MMU_AMR | 0x00000004, /* Architecture 2.07 "degraded" (no 1T segments) */ POWERPC_MMU_2_07a = POWERPC_MMU_64 | POWERPC_MMU_AMR diff --git a/target-ppc/mmu-hash64.c b/target-ppc/mmu-hash64.c index ed353b2d1539..fa26ad2e875b 100644 --- a/target-ppc/mmu-hash64.c +++ b/target-ppc/mmu-hash64.c @@ -450,9 +450,31 @@ void ppc_hash64_stop_access(PowerPCCPU *cpu, uint64_t token) } } +/* Returns the effective page shift or 0. MPSS isn't supported yet so + * this will always be the slb_pshift or 0 + */ +static uint32_t ppc_hash64_pte_size_decode(uint64_t pte1, uint32_t slb_pshift) +{ + switch (slb_pshift) { + case 12: + return 12; + case 16: + if ((pte1 & 0xf000) == 0x1000) { + return 16; + } + return 0; + case 24: + if ((pte1 & 0xff000) == 0) { + return 24; + } + return 0; + } + return 0; +} + static hwaddr ppc_hash64_pteg_search(PowerPCCPU *cpu, hwaddr hash, - bool secondary, target_ulong ptem, - ppc_hash_pte64_t *pte) + uint32_t slb_pshift, bool secondary, + target_ulong ptem, ppc_hash_pte64_t *pte) { CPUPPCState *env = &cpu->env; int i; @@ -472,6 +494,13 @@ static hwaddr ppc_hash64_pteg_search(PowerPCCPU *cpu, hwaddr hash, if ((pte0 & HPTE64_V_VALID) && (secondary == !!(pte0 & HPTE64_V_SECONDARY)) && HPTE64_V_COMPARE(pte0, ptem)) { + uint32_t pshift = ppc_hash64_pte_size_decode(pte1, slb_pshift); + if (pshift == 0) { + continue; + } + /* We don't do anything with pshift yet as qemu TLB only deals + * with 4K pages anyway + */ pte->pte0 = pte0; pte->pte1 = pte1; ppc_hash64_stop_access(cpu, token); @@ -525,7 +554,8 @@ static hwaddr ppc_hash64_htab_lookup(PowerPCCPU *cpu, " vsid=" TARGET_FMT_lx " ptem=" TARGET_FMT_lx " hash=" TARGET_FMT_plx "\n", env->htab_base, env->htab_mask, vsid, ptem, hash); - pte_offset = ppc_hash64_pteg_search(cpu, hash, 0, ptem, pte); + pte_offset = ppc_hash64_pteg_search(cpu, hash, slb->sps->page_shift, + 0, ptem, pte); if (pte_offset == -1) { /* Secondary PTEG lookup */ @@ -535,7 +565,8 @@ static hwaddr ppc_hash64_htab_lookup(PowerPCCPU *cpu, " hash=" TARGET_FMT_plx "\n", env->htab_base, env->htab_mask, vsid, ptem, ~hash); - pte_offset = ppc_hash64_pteg_search(cpu, ~hash, 1, ptem, pte); + pte_offset = ppc_hash64_pteg_search(cpu, ~hash, slb->sps->page_shift, 1, + ptem, pte); } return pte_offset; diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c index 4820c0bc99fb..d7860fd7f8ee 100644 --- a/target-ppc/translate_init.c +++ b/target-ppc/translate_init.c @@ -10301,8 +10301,8 @@ static void ppc_cpu_initfn(Object *obj) if (pcc->sps) { env->sps = *pcc->sps; } else if (env->mmu_model & POWERPC_MMU_64) { - /* Use default sets of page sizes */ - static const struct ppc_segment_page_sizes defsps = { + /* Use default sets of page sizes. We don't support MPSS */ + static const struct ppc_segment_page_sizes defsps_4k = { .sps = { { .page_shift = 12, /* 4K */ .slb_enc = 0, @@ -10314,7 +10314,23 @@ static void ppc_cpu_initfn(Object *obj) }, }, }; - env->sps = defsps; + static const struct ppc_segment_page_sizes defsps_64k = { + .sps = { + { .page_shift = 12, /* 4K */ + .slb_enc = 0, + .enc = { { .page_shift = 12, .pte_enc = 0 } } + }, + { .page_shift = 16, /* 64K */ + .slb_enc = 0x110, + .enc = { { .page_shift = 16, .pte_enc = 1 } } + }, + { .page_shift = 24, /* 16M */ + .slb_enc = 0x100, + .enc = { { .page_shift = 24, .pte_enc = 0 } } + }, + }, + }; + env->sps = (env->mmu_model & POWERPC_MMU_64K) ? defsps_64k : defsps_4k; } #endif /* defined(TARGET_PPC64) */