From nobody Thu Nov 28 08:42:34 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1693818761041620.5067810168065; Mon, 4 Sep 2023 02:12:41 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qd5Yj-0003VH-Lm; Mon, 04 Sep 2023 05:07:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qd5Yb-0003Cn-6A; Mon, 04 Sep 2023 05:07:41 -0400 Received: from mail.ozlabs.org ([2404:9400:2221:ea00::3] helo=gandalf.ozlabs.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qd5YY-0003qU-GI; Mon, 04 Sep 2023 05:07:40 -0400 Received: from gandalf.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) by gandalf.ozlabs.org (Postfix) with ESMTP id 4RfN7s3kK2z4x09; Mon, 4 Sep 2023 19:07:37 +1000 (AEST) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4RfN7q30tRz4wxN; Mon, 4 Sep 2023 19:07:35 +1000 (AEST) From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-ppc@nongnu.org, qemu-devel@nongnu.org Cc: Daniel Henrique Barboza , Nicholas Piggin , Pavel Dovgalyuk , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PULL 23/35] spapr: Fix machine reset deadlock from replay-record Date: Mon, 4 Sep 2023 11:06:18 +0200 Message-ID: <20230904090630.725952-24-clg@kaod.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230904090630.725952-1-clg@kaod.org> References: <20230904090630.725952-1-clg@kaod.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2404:9400:2221:ea00::3; envelope-from=SRS0=kZzc=EU=kaod.org=clg@ozlabs.org; helo=gandalf.ozlabs.org X-Spam_score_int: -39 X-Spam_score: -4.0 X-Spam_bar: ---- X-Spam_report: (-4.0 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1693818763029100001 From: Nicholas Piggin When the machine is reset to load a new snapshot while being debugged with replay-record, it is done from another thread, so the CPU does not run the register setting operations. Set CPU registers directly in machine reset. Cc: Pavel Dovgalyuk Signed-off-by: Nicholas Piggin Signed-off-by: C=C3=A9dric Le Goater --- include/hw/ppc/spapr.h | 1 + target/ppc/cpu.h | 1 + hw/ppc/spapr.c | 20 ++++++++++++++++++-- target/ppc/compat.c | 19 +++++++++++++++++++ 4 files changed, 39 insertions(+), 2 deletions(-) diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 538b2dfb8996..f47e8419a575 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -1012,6 +1012,7 @@ bool spapr_check_pagesize(SpaprMachineState *spapr, h= waddr pagesize, #define SPAPR_OV5_XIVE_BOTH 0x80 /* Only to advertise on the platform = */ =20 void spapr_set_all_lpcrs(target_ulong value, target_ulong mask); +void spapr_init_all_lpcrs(target_ulong value, target_ulong mask); hwaddr spapr_get_rtas_addr(void); bool spapr_memory_hot_unplug_supported(SpaprMachineState *spapr); =20 diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index 77113521acfd..173e4c351a41 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -1504,6 +1504,7 @@ int ppc_set_compat(PowerPCCPU *cpu, uint32_t compat_p= vr, Error **errp); =20 #if !defined(CONFIG_USER_ONLY) int ppc_set_compat_all(uint32_t compat_pvr, Error **errp); +int ppc_init_compat_all(uint32_t compat_pvr, Error **errp); #endif int ppc_compat_max_vthreads(PowerPCCPU *cpu); void ppc_compat_add_property(Object *obj, const char *name, diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 07e91e380077..c0b0ada121f9 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -1322,6 +1322,22 @@ void spapr_set_all_lpcrs(target_ulong value, target_= ulong mask) } } =20 +/* May be used when the machine is not running */ +void spapr_init_all_lpcrs(target_ulong value, target_ulong mask) +{ + CPUState *cs; + CPU_FOREACH(cs) { + PowerPCCPU *cpu =3D POWERPC_CPU(cs); + CPUPPCState *env =3D &cpu->env; + target_ulong lpcr; + + lpcr =3D env->spr[SPR_LPCR]; + lpcr &=3D ~(LPCR_HR | LPCR_UPRT); + ppc_store_lpcr(cpu, lpcr); + } +} + + static bool spapr_get_pate(PPCVirtualHypervisor *vhyp, PowerPCCPU *cpu, target_ulong lpid, ppc_v3_pate_t *entry) { @@ -1583,7 +1599,7 @@ int spapr_reallocate_hpt(SpaprMachineState *spapr, in= t shift, Error **errp) } /* We're setting up a hash table, so that means we're not radix */ spapr->patb_entry =3D 0; - spapr_set_all_lpcrs(0, LPCR_HR | LPCR_UPRT); + spapr_init_all_lpcrs(0, LPCR_HR | LPCR_UPRT); return 0; } =20 @@ -1661,7 +1677,7 @@ static void spapr_machine_reset(MachineState *machine= , ShutdownCause reason) spapr_ovec_cleanup(spapr->ov5_cas); spapr->ov5_cas =3D spapr_ovec_new(); =20 - ppc_set_compat_all(spapr->max_compat_pvr, &error_fatal); + ppc_init_compat_all(spapr->max_compat_pvr, &error_fatal); =20 /* * This is fixing some of the default configuration of the XIVE diff --git a/target/ppc/compat.c b/target/ppc/compat.c index 7949a24f5a15..ebef2cccecf3 100644 --- a/target/ppc/compat.c +++ b/target/ppc/compat.c @@ -229,6 +229,25 @@ int ppc_set_compat_all(uint32_t compat_pvr, Error **er= rp) return 0; } =20 +/* To be used when the machine is not running */ +int ppc_init_compat_all(uint32_t compat_pvr, Error **errp) +{ + CPUState *cs; + + CPU_FOREACH(cs) { + PowerPCCPU *cpu =3D POWERPC_CPU(cs); + int ret; + + ret =3D ppc_set_compat(cpu, compat_pvr, errp); + + if (ret < 0) { + return ret; + } + } + + return 0; +} + int ppc_compat_max_vthreads(PowerPCCPU *cpu) { const CompatInfo *compat =3D compat_by_pvr(cpu->compat_pvr); --=20 2.41.0