From nobody Tue May 7 21:44:10 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; dkim=fail spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1493278231334643.3041022547872; Thu, 27 Apr 2017 00:30:31 -0700 (PDT) Received: from localhost ([::1]:59177 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3dsj-0000Vg-IM for importer@patchew.org; Thu, 27 Apr 2017 03:30:29 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49560) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3drB-0007j7-HZ for qemu-devel@nongnu.org; Thu, 27 Apr 2017 03:28:54 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3drA-0005EB-Ja for qemu-devel@nongnu.org; Thu, 27 Apr 2017 03:28:53 -0400 Received: from ozlabs.org ([2401:3900:2:1::2]:35455) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d3drA-00059A-65; Thu, 27 Apr 2017 03:28:52 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 3wD7q30wJxz9s78; Thu, 27 Apr 2017 17:28:46 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1493278127; bh=uR8TyFOIvgm1CV8Hb235gVUhTmAPwMC2VYOrw+EW4Kg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AIJyBLJc3CN5lSJdnBjfLR3D8IDMykRtSZeBLbMVT/RKlE4+MQRHUZfufTPogaqjR bnrdkoISL7HRKfuGK9hojaE/QTf5fsUjdtxBfisyZhiMhA3d4p09qTx17k2Ct6X0bs +XdMabL89H49eI88necA2ozbG67G/cS55ye0Wuv8= From: David Gibson To: groug@kaod.org, clg@kaod.org, aik@ozlabs.ru, mdroth@linux.vnet.ibm.com, nikunj@linux.vnet.ibm.com Date: Thu, 27 Apr 2017 17:28:40 +1000 Message-Id: <20170427072843.8089-2-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170427072843.8089-1-david@gibson.dropbear.id.au> References: <20170427072843.8089-1-david@gibson.dropbear.id.au> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2401:3900:2:1::2 Subject: [Qemu-devel] [PATCHv3 1/4] qapi: add explicit null to string input and output visitors 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: agraf@suse.de, qemu-devel@nongnu.org, armbru@redhat.com, qemu-ppc@nongnu.org, abologna@redhat.com, David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Greg Kurz This may be used for deprecated object properties that are kept for backwards compatibility. Signed-off-by: Greg Kurz Reviewed-by: Markus Armbruster Signed-off-by: David Gibson --- qapi/string-input-visitor.c | 11 +++++++++++ qapi/string-output-visitor.c | 14 ++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/qapi/string-input-visitor.c b/qapi/string-input-visitor.c index c089491..63ae115 100644 --- a/qapi/string-input-visitor.c +++ b/qapi/string-input-visitor.c @@ -326,6 +326,16 @@ static void parse_type_number(Visitor *v, const char *= name, double *obj, *obj =3D val; } =20 +static void parse_type_null(Visitor *v, const char *name, Error **errp) +{ + StringInputVisitor *siv =3D to_siv(v); + + if (!siv->string || siv->string[0]) { + error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null", + "null"); + } +} + static void string_input_free(Visitor *v) { StringInputVisitor *siv =3D to_siv(v); @@ -349,6 +359,7 @@ Visitor *string_input_visitor_new(const char *str) v->visitor.type_bool =3D parse_type_bool; v->visitor.type_str =3D parse_type_str; v->visitor.type_number =3D parse_type_number; + v->visitor.type_null =3D parse_type_null; v->visitor.start_list =3D start_list; v->visitor.next_list =3D next_list; v->visitor.check_list =3D check_list; diff --git a/qapi/string-output-visitor.c b/qapi/string-output-visitor.c index 94ac821..5ec5352 100644 --- a/qapi/string-output-visitor.c +++ b/qapi/string-output-visitor.c @@ -266,6 +266,19 @@ static void print_type_number(Visitor *v, const char *= name, double *obj, string_output_set(sov, g_strdup_printf("%f", *obj)); } =20 +static void print_type_null(Visitor *v, const char *name, Error **errp) +{ + StringOutputVisitor *sov =3D to_sov(v); + char *out; + + if (sov->human) { + out =3D g_strdup(""); + } else { + out =3D g_strdup(""); + } + string_output_set(sov, out); +} + static void start_list(Visitor *v, const char *name, GenericList **list, size_t size, Error **errp) @@ -351,6 +364,7 @@ Visitor *string_output_visitor_new(bool human, char **r= esult) v->visitor.type_bool =3D print_type_bool; v->visitor.type_str =3D print_type_str; v->visitor.type_number =3D print_type_number; + v->visitor.type_null =3D print_type_null; v->visitor.start_list =3D start_list; v->visitor.next_list =3D next_list; v->visitor.end_list =3D end_list; --=20 2.9.3 From nobody Tue May 7 21:44:10 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; dkim=fail spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1493278353914193.61865071029104; Thu, 27 Apr 2017 00:32:33 -0700 (PDT) Received: from localhost ([::1]:59184 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3dui-00022q-EJ for importer@patchew.org; Thu, 27 Apr 2017 03:32:32 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49597) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3drD-0007jG-1b for qemu-devel@nongnu.org; Thu, 27 Apr 2017 03:28:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3drA-0005ES-Vp for qemu-devel@nongnu.org; Thu, 27 Apr 2017 03:28:55 -0400 Received: from ozlabs.org ([2401:3900:2:1::2]:37857) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d3drA-000593-8F; Thu, 27 Apr 2017 03:28:52 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 3wD7q26pHHz9s4q; Thu, 27 Apr 2017 17:28:46 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1493278126; bh=EjI/GDNgRKad6alWY4J22aEqsZEu4ZT86XaRQFltvqM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=orhWYfgmU268TIBWwLoWq0+3svnkNScXJrEBky6vydTm/iM2/Hod00Rah4DE7oozi +3CVkj15OifZZb9YvEM58Km350yifUt8n4V0tDe9BVi5NhTlusodpAzt1hGIxisFh2 qRzQOXRwWEfcQoSjsh/0z7Ws4QcfgQc0/2lkXpEM= From: David Gibson To: groug@kaod.org, clg@kaod.org, aik@ozlabs.ru, mdroth@linux.vnet.ibm.com, nikunj@linux.vnet.ibm.com Date: Thu, 27 Apr 2017 17:28:41 +1000 Message-Id: <20170427072843.8089-3-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170427072843.8089-1-david@gibson.dropbear.id.au> References: <20170427072843.8089-1-david@gibson.dropbear.id.au> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2401:3900:2:1::2 Subject: [Qemu-devel] [PATCHv3 2/4] pseries: Move CPU compatibility property to machine 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: agraf@suse.de, qemu-devel@nongnu.org, armbru@redhat.com, qemu-ppc@nongnu.org, abologna@redhat.com, David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Server class POWER CPUs have a "compat" property, which is used to set the backwards compatibility mode for the processor. However, this only makes sense for machine types which don't give the guest access to hypervisor privilege - otherwise the compatibility level is under the guest's control. To reflect this, this removes the CPU 'compat' property and instead creates a 'max-cpu-compat' property on the pseries machine. Strictly speaking this breaks compatibility, but AFAIK the 'compat' option was never (directly) used with -device or device_add. The option was used with -cpu. So, to maintain compatibility, this patch adds a hack to the cpu option parsing to strip out any compat options supplied with -cpu and set them on the machine property instead of the new removed cpu property. Signed-off-by: David Gibson --- hw/ppc/spapr.c | 6 +++- hw/ppc/spapr_cpu_core.c | 41 ++++++++++++++++++++-- hw/ppc/spapr_hcall.c | 2 +- include/hw/ppc/spapr.h | 12 ++++--- target/ppc/compat.c | 65 +++++++++++++++++++++++++++++++++++ target/ppc/cpu.h | 6 ++-- target/ppc/translate_init.c | 84 +++++++++++++----------------------------= ---- 7 files changed, 145 insertions(+), 71 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 80d12d0..547fa27 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2117,7 +2117,7 @@ static void ppc_spapr_init(MachineState *machine) machine->cpu_model =3D kvm_enabled() ? "host" : smc->tcg_default_c= pu; } =20 - ppc_cpu_parse_features(machine->cpu_model); + spapr_cpu_parse_features(spapr); =20 spapr_init_cpus(spapr); =20 @@ -2480,6 +2480,10 @@ static void spapr_machine_initfn(Object *obj) " place of standard EPOW events when p= ossible" " (required for memory hot-unplug supp= ort)", NULL); + + object_property_add(obj, "max-cpu-compat", "str", + ppc_compat_prop_get, ppc_compat_prop_set, + NULL, &spapr->max_compat_pvr, &error_fatal); } =20 static void spapr_machine_finalizefn(Object *obj) diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c index 4389ef4..ba610bc 100644 --- a/hw/ppc/spapr_cpu_core.c +++ b/hw/ppc/spapr_cpu_core.c @@ -20,6 +20,43 @@ #include "sysemu/numa.h" #include "qemu/error-report.h" =20 +void spapr_cpu_parse_features(sPAPRMachineState *spapr) +{ + /* + * Backwards compatibility hack: + + * CPUs had a "compat=3D" property which didn't make sense for + * anything except pseries. It was replaced by "max-cpu-compat" + * machine option. This supports old command lines like + * -cpu POWER8,compat=3Dpower7 + * By stripping the compat option and applying it to the machine + * before passing it on to the cpu level parser. + */ + gchar **inpieces; + int n, i; + gchar *compat_str =3D NULL; + + inpieces =3D g_strsplit(MACHINE(spapr)->cpu_model, ",", 0); + n =3D g_strv_length(inpieces); + + /* inpieces[0] is the actual model string */ + for (i =3D 0; i < n; i++) { + if (g_str_has_prefix(inpieces[i], "compat=3D")) { + compat_str =3D inpieces[i]; + } + } + + if (compat_str) { + char *val =3D compat_str + strlen("compat=3D"); + object_property_set_str(OBJECT(spapr), val, "max-cpu-compat", + &error_fatal); + } + + ppc_cpu_parse_features(MACHINE(spapr)->cpu_model); + + g_strfreev(inpieces); +} + static void spapr_cpu_reset(void *opaque) { sPAPRMachineState *spapr =3D SPAPR_MACHINE(qdev_get_machine()); @@ -70,10 +107,10 @@ static void spapr_cpu_init(sPAPRMachineState *spapr, P= owerPCCPU *cpu, /* Enable PAPR mode in TCG or KVM */ cpu_ppc_set_papr(cpu, PPC_VIRTUAL_HYPERVISOR(spapr)); =20 - if (cpu->max_compat) { + if (spapr->max_compat_pvr) { Error *local_err =3D NULL; =20 - ppc_set_compat(cpu, cpu->max_compat, &local_err); + ppc_set_compat(cpu, spapr->max_compat_pvr, &local_err); if (local_err) { error_propagate(errp, local_err); return; diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c index 9f18f75..d4dc12b 100644 --- a/hw/ppc/spapr_hcall.c +++ b/hw/ppc/spapr_hcall.c @@ -1059,7 +1059,7 @@ static target_ulong h_client_architecture_support(Pow= erPCCPU *cpu, target_ulong list =3D ppc64_phys_to_real(args[0]); target_ulong ov_table; bool explicit_match =3D false; /* Matched the CPU's real PVR */ - uint32_t max_compat =3D cpu->max_compat; + uint32_t max_compat =3D spapr->max_compat_pvr; uint32_t best_compat =3D 0; int i; sPAPROptionVector *ov1_guest, *ov5_guest, *ov5_cas_old, *ov5_updates; diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 5802f88..40d5f89 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -86,16 +86,19 @@ struct sPAPRMachineState { uint64_t rtc_offset; /* Now used only during incoming migration */ struct PPCTimebase tb; bool has_graphics; - sPAPROptionVector *ov5; /* QEMU-supported option vectors */ - sPAPROptionVector *ov5_cas; /* negotiated (via CAS) option vectors= */ - bool cas_reboot; - bool cas_legacy_guest_workaround; =20 Notifier epow_notifier; QTAILQ_HEAD(, sPAPREventLogEntry) pending_events; bool use_hotplug_event_source; sPAPREventSource *event_sources; =20 + /* ibm,client-architecture-support option negotiation */ + bool cas_reboot; + bool cas_legacy_guest_workaround; + sPAPROptionVector *ov5; /* QEMU-supported option vectors */ + sPAPROptionVector *ov5_cas; /* negotiated (via CAS) option vectors= */ + uint32_t max_compat_pvr; + /* Migration state */ int htab_save_index; bool htab_first_pass; @@ -633,6 +636,7 @@ void spapr_hotplug_req_add_by_count_indexed(sPAPRDRConn= ectorType drc_type, uint32_t count, uint32_t index= ); void spapr_hotplug_req_remove_by_count_indexed(sPAPRDRConnectorType drc_ty= pe, uint32_t count, uint32_t in= dex); +void spapr_cpu_parse_features(sPAPRMachineState *spapr); void *spapr_populate_hotplug_cpu_dt(CPUState *cs, int *fdt_offset, sPAPRMachineState *spapr); =20 diff --git a/target/ppc/compat.c b/target/ppc/compat.c index e8ec1e1..476dead 100644 --- a/target/ppc/compat.c +++ b/target/ppc/compat.c @@ -24,9 +24,11 @@ #include "sysemu/cpus.h" #include "qemu/error-report.h" #include "qapi/error.h" +#include "qapi/visitor.h" #include "cpu-models.h" =20 typedef struct { + const char *name; uint32_t pvr; uint64_t pcr; uint64_t pcr_level; @@ -38,6 +40,7 @@ static const CompatInfo compat_table[] =3D { * Ordered from oldest to newest - the code relies on this */ { /* POWER6, ISA2.05 */ + .name =3D "power6", .pvr =3D CPU_POWERPC_LOGICAL_2_05, .pcr =3D PCR_COMPAT_3_00 | PCR_COMPAT_2_07 | PCR_COMPAT_2_06 | PCR_COMPAT_2_05 | PCR_TM_DIS | PCR_VSX_DIS, @@ -45,18 +48,21 @@ static const CompatInfo compat_table[] =3D { .max_threads =3D 2, }, { /* POWER7, ISA2.06 */ + .name =3D "power7", .pvr =3D CPU_POWERPC_LOGICAL_2_06, .pcr =3D PCR_COMPAT_3_00 | PCR_COMPAT_2_07 | PCR_COMPAT_2_06 | PCR= _TM_DIS, .pcr_level =3D PCR_COMPAT_2_06, .max_threads =3D 4, }, { + .name =3D "power7+", .pvr =3D CPU_POWERPC_LOGICAL_2_06_PLUS, .pcr =3D PCR_COMPAT_3_00 | PCR_COMPAT_2_07 | PCR_COMPAT_2_06 | PCR= _TM_DIS, .pcr_level =3D PCR_COMPAT_2_06, .max_threads =3D 4, }, { /* POWER8, ISA2.07 */ + .name =3D "power8", .pvr =3D CPU_POWERPC_LOGICAL_2_07, .pcr =3D PCR_COMPAT_3_00 | PCR_COMPAT_2_07, .pcr_level =3D PCR_COMPAT_2_07, @@ -189,3 +195,62 @@ int ppc_compat_max_threads(PowerPCCPU *cpu) =20 return n_threads; } + +void ppc_compat_prop_get(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + uint32_t compat_pvr =3D *((uint32_t *)opaque); + const char *value; + + if (!compat_pvr) { + value =3D ""; + } else { + const CompatInfo *compat =3D compat_by_pvr(compat_pvr); + + g_assert(compat); + + value =3D compat->name; + } + + visit_type_str(v, name, (char **)&value, errp); +} + +void ppc_compat_prop_set(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + Error *error =3D NULL; + char *value; + uint32_t compat_pvr; + + visit_type_str(v, name, &value, &error); + if (error) { + error_propagate(errp, error); + return; + } + + if (strcmp(value, "") =3D=3D 0) { + compat_pvr =3D 0; + } else { + int i; + const CompatInfo *compat =3D NULL; + + for (i =3D 0; i < ARRAY_SIZE(compat_table); i++) { + if (strcmp(value, compat_table[i].name) =3D=3D 0) { + compat =3D &compat_table[i]; + break; + + } + } + + if (!compat) { + error_setg(errp, "Invalid compatibility mode \"%s\"", value); + goto out; + } + compat_pvr =3D compat->pvr; + } + + *((uint32_t *)opaque) =3D compat_pvr; + +out: + g_free(value); +} diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index e0ff041..e953e75 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -1185,7 +1185,6 @@ typedef struct PPCVirtualHypervisorClass PPCVirtualHy= pervisorClass; * PowerPCCPU: * @env: #CPUPPCState * @cpu_dt_id: CPU index used in the device tree. KVM uses this index too - * @max_compat: Maximal supported logical PVR from the command line * @compat_pvr: Current logical PVR, zero if in "raw" mode * * A PowerPC CPU. @@ -1197,7 +1196,6 @@ struct PowerPCCPU { =20 CPUPPCState env; int cpu_dt_id; - uint32_t max_compat; uint32_t compat_pvr; PPCVirtualHypervisor *vhyp; Object *intc; @@ -1369,6 +1367,10 @@ void ppc_set_compat(PowerPCCPU *cpu, uint32_t compat= _pvr, Error **errp); void ppc_set_compat_all(uint32_t compat_pvr, Error **errp); #endif int ppc_compat_max_threads(PowerPCCPU *cpu); +void ppc_compat_prop_get(Object *obj, Visitor *v, + const char *name, void *opaque, Error **err); +void ppc_compat_prop_set(Object *obj, Visitor *v, + const char *name, void *opaque, Error **err); #endif /* defined(TARGET_PPC64) */ =20 #include "exec/cpu-all.h" diff --git a/target/ppc/translate_init.c b/target/ppc/translate_init.c index e82e3e6..a92c825 100644 --- a/target/ppc/translate_init.c +++ b/target/ppc/translate_init.c @@ -8413,73 +8413,35 @@ POWERPC_FAMILY(POWER5P)(ObjectClass *oc, void *data) pcc->l1_icache_size =3D 0x10000; } =20 -static void powerpc_get_compat(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) -{ - char *value =3D (char *)""; - Property *prop =3D opaque; - uint32_t *max_compat =3D qdev_get_prop_ptr(DEVICE(obj), prop); - - switch (*max_compat) { - case CPU_POWERPC_LOGICAL_2_05: - value =3D (char *)"power6"; - break; - case CPU_POWERPC_LOGICAL_2_06: - value =3D (char *)"power7"; - break; - case CPU_POWERPC_LOGICAL_2_07: - value =3D (char *)"power8"; - break; - case 0: - break; - default: - error_report("Internal error: compat is set to %x", *max_compat); - abort(); - break; - } - - visit_type_str(v, name, &value, errp); -} - -static void powerpc_set_compat(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) +/* + * The CPU used to have a "compat" property which set the + * compatibility mode PVR. However, this was conceptually broken - it + * only makes sense on the pseries machine type (otherwise the guest + * owns the PCR and can control the compatibility mode itself). It's + * been replaced with the 'max-cpu-compat' property on the pseries + * machine type. For backwards compatibility, pseries specially + * parses the -cpu parameter and converts old compat=3D parameters into + * the appropriate machine parameters. This stub implementation of + * the parameter catches any uses on explicitly created CPUs. + */ +static void getset_compat_deprecated(Object *obj, Visitor *v, const char *= name, + void *opaque, Error **errp) { - Error *error =3D NULL; - char *value =3D NULL; - Property *prop =3D opaque; - uint32_t *max_compat =3D qdev_get_prop_ptr(DEVICE(obj), prop); - - visit_type_str(v, name, &value, &error); - if (error) { - error_propagate(errp, error); - return; - } - - if (strcmp(value, "power6") =3D=3D 0) { - *max_compat =3D CPU_POWERPC_LOGICAL_2_05; - } else if (strcmp(value, "power7") =3D=3D 0) { - *max_compat =3D CPU_POWERPC_LOGICAL_2_06; - } else if (strcmp(value, "power8") =3D=3D 0) { - *max_compat =3D CPU_POWERPC_LOGICAL_2_07; - } else { - error_setg(errp, "Invalid compatibility mode \"%s\"", value); - } - - g_free(value); + error_report("CPU 'compat' property is deprecated and has no effect; u= se max-cpu-compat machine property instead"); + visit_type_null(v, name, errp); } =20 -static PropertyInfo powerpc_compat_propinfo =3D { +static PropertyInfo ppc_compat_deprecated_propinfo =3D { .name =3D "str", - .description =3D "compatibility mode, power6/power7/power8", - .get =3D powerpc_get_compat, - .set =3D powerpc_set_compat, + .description =3D "compatibility mode (deprecated)", + .get =3D getset_compat_deprecated, + .set =3D getset_compat_deprecated, }; - -#define DEFINE_PROP_POWERPC_COMPAT(_n, _s, _f) \ - DEFINE_PROP(_n, _s, _f, powerpc_compat_propinfo, uint32_t) - static Property powerpc_servercpu_properties[] =3D { - DEFINE_PROP_POWERPC_COMPAT("compat", PowerPCCPU, max_compat), + { + .name =3D "compat", + .info =3D &ppc_compat_deprecated_propinfo, + }, DEFINE_PROP_END_OF_LIST(), }; =20 --=20 2.9.3 From nobody Tue May 7 21:44:10 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; dkim=fail spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1493278362162633.6824339809458; Thu, 27 Apr 2017 00:32:42 -0700 (PDT) Received: from localhost ([::1]:59185 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3duq-00028g-RB for importer@patchew.org; Thu, 27 Apr 2017 03:32:40 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49602) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3drD-0007ji-Aw for qemu-devel@nongnu.org; Thu, 27 Apr 2017 03:28:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3drA-0005DS-7r for qemu-devel@nongnu.org; Thu, 27 Apr 2017 03:28:55 -0400 Received: from ozlabs.org ([103.22.144.67]:51621) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d3dr9-000594-RF; Thu, 27 Apr 2017 03:28:52 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 3wD7q3203jz9s75; Thu, 27 Apr 2017 17:28:47 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1493278127; bh=7YaxMEpZs7LBu5mmxSBmb8dbhiEwX+9PAc6Chsff8VQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BBtMdxxDriV4hOvIoCFQbFiXA5Yvn3BndcBx1I4o/aNWlvTpyt13T2O9qFYUanDA3 BWfciXTsZjGr6cT/BS9vCstHLGhl0/nHr8TxrnZh+jJ9vcnBLTkfkM9echw4qqPulP x2Q9bD4gPWc3uBPy+Fbn+CpPgYBrjmZl00y9O5gU= From: David Gibson To: groug@kaod.org, clg@kaod.org, aik@ozlabs.ru, mdroth@linux.vnet.ibm.com, nikunj@linux.vnet.ibm.com Date: Thu, 27 Apr 2017 17:28:42 +1000 Message-Id: <20170427072843.8089-4-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170427072843.8089-1-david@gibson.dropbear.id.au> References: <20170427072843.8089-1-david@gibson.dropbear.id.au> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 103.22.144.67 Subject: [Qemu-devel] [PATCHv3 3/4] pseries: Reset CPU compatibility mode 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: agraf@suse.de, qemu-devel@nongnu.org, armbru@redhat.com, qemu-ppc@nongnu.org, abologna@redhat.com, David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Currently, the CPU compatibility mode is set when the cpu is initialized, then again when the guest negotiates features. This means if a guest negotiates a compatibility mode, then reboots, that compatibility mode will be retained across the reset. Usually that will get overridden when features are negotiated on the next boot, but it's still not really correct. This patch moves the initial set up of the compatibility mode from cpu init to reset time. The mode *is* retained if the reboot was caused by the feature negotiation (it might be important in that case, though it's unlikely). Signed-off-by: David Gibson Reviewed-by: Alexey Kardashevskiy Reviewed-by: Michael Roth --- hw/ppc/spapr.c | 2 ++ hw/ppc/spapr_cpu_core.c | 10 ---------- 2 files changed, 2 insertions(+), 10 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 547fa27..67f5106 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -1332,6 +1332,8 @@ static void ppc_spapr_reset(void) if (!spapr->cas_reboot) { spapr_ovec_cleanup(spapr->ov5_cas); spapr->ov5_cas =3D spapr_ovec_new(); + + ppc_set_compat_all(spapr->max_compat_pvr, &error_abort); } =20 fdt =3D spapr_build_fdt(spapr, rtas_addr, spapr->rtas_size); diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c index ba610bc..e810431 100644 --- a/hw/ppc/spapr_cpu_core.c +++ b/hw/ppc/spapr_cpu_core.c @@ -107,16 +107,6 @@ static void spapr_cpu_init(sPAPRMachineState *spapr, P= owerPCCPU *cpu, /* Enable PAPR mode in TCG or KVM */ cpu_ppc_set_papr(cpu, PPC_VIRTUAL_HYPERVISOR(spapr)); =20 - if (spapr->max_compat_pvr) { - Error *local_err =3D NULL; - - ppc_set_compat(cpu, spapr->max_compat_pvr, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } - } - qemu_register_reset(spapr_cpu_reset, cpu); spapr_cpu_reset(cpu); } --=20 2.9.3 From nobody Tue May 7 21:44:10 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; dkim=fail spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1493278236005494.2232861970141; Thu, 27 Apr 2017 00:30:36 -0700 (PDT) Received: from localhost ([::1]:59179 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3dso-0000Zi-Lr for importer@patchew.org; Thu, 27 Apr 2017 03:30:34 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49564) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3drB-0007j8-SU for qemu-devel@nongnu.org; Thu, 27 Apr 2017 03:28:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3drA-0005EG-Jw for qemu-devel@nongnu.org; Thu, 27 Apr 2017 03:28:53 -0400 Received: from ozlabs.org ([2401:3900:2:1::2]:46011) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d3drA-00059K-69; Thu, 27 Apr 2017 03:28:52 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 3wD7q32c1Dz9s7B; Thu, 27 Apr 2017 17:28:47 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1493278127; bh=sTBXkwXFe6HfdqjaqiOyNCAnfUnY1mUeOfg+yRlnmkk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CHcbWMReGpGq/Fk3Uifp9eTV5/gWZJg1yj1DelM6oicWAaSy6HjeCZBD9U4H3XFs9 YfArCeQkpMRLfCMF4Aq8OUjRHtqctCiI8yA/IvLNbyMYx9xaH1+eVw2RocaXtH/irV vRivnqD0CyAEGGLEetsLOkjoQCNvHt1aQSKqXgls= From: David Gibson To: groug@kaod.org, clg@kaod.org, aik@ozlabs.ru, mdroth@linux.vnet.ibm.com, nikunj@linux.vnet.ibm.com Date: Thu, 27 Apr 2017 17:28:43 +1000 Message-Id: <20170427072843.8089-5-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170427072843.8089-1-david@gibson.dropbear.id.au> References: <20170427072843.8089-1-david@gibson.dropbear.id.au> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2401:3900:2:1::2 Subject: [Qemu-devel] [PATCHv3 4/4] ppc: Rework CPU compatibility testing across migration 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: agraf@suse.de, qemu-devel@nongnu.org, armbru@redhat.com, qemu-ppc@nongnu.org, abologna@redhat.com, David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Migrating between different CPU versions is a bit complicated for ppc. A long time ago, we ensured identical CPU versions at either end by checking the PVR had the same value. However, this breaks under KVM HV, because we always have to use the host's PVR - it's not virtualized. That would mean we couldn't migrate between hosts with different PVRs, even if the CPUs are close enough to compatible in practice (sometimes identical cores with different surrounding logic have different PVRs, so this happens in practice quite often). So, we removed the PVR check, but instead checked that several flags indicating supported instructions matched. This turns out to be a bad idea, because those instruction masks are not architected information, but essentially a TCG implementation detail. So changes to qemu internal CPU modelling can break migration - this happened between qemu-2.6 and qemu-2.7. That was addressed by 146c11f1 "target-ppc: Allow eventual removal of old migration mistakes". Now, verification of CPU compatibility across a migration basically doesn't happen. We simply ignore the PVR of the incoming migration, and hope the cpu on the destination is close enough to work. Now that we've cleaned up handling of processor compatibility modes for pseries machine type, we can do better. We allow migration if: * The source and destination PVRs are for the same type of CPU, as determined by CPU class's pvr_match function OR * When the source was in a compatibility mode, and the destination CPU supports the same compatibility mode Signed-off-by: David Gibson --- target/ppc/machine.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++= +--- 1 file changed, 68 insertions(+), 3 deletions(-) diff --git a/target/ppc/machine.c b/target/ppc/machine.c index 6cb3a48..20a46c9 100644 --- a/target/ppc/machine.c +++ b/target/ppc/machine.c @@ -8,6 +8,7 @@ #include "helper_regs.h" #include "mmu-hash64.h" #include "migration/cpu.h" +#include "qapi/error.h" =20 static int cpu_load_old(QEMUFile *f, void *opaque, int version_id) { @@ -195,6 +196,30 @@ static void cpu_pre_save(void *opaque) } } =20 +/* + * Determine if a given PVR is a "close enough" match to the CPU + * object. For TCG and KVM PR it would probably be sufficient to + * require an exact PVR match. However for KVM HV the user is + * restricted to a PVR exactly matching the host CPU. The correct way + * to handle this is to put the guest into an architected + * compatibility mode. However, to allow a more forgiving transition + * and migration from before this was widely done, we allow migration + * between sufficiently similar PVRs, as determined by the CPU class's + * pvr_match() hook. + */ +static bool pvr_match(PowerPCCPU *cpu, uint32_t pvr) +{ + PowerPCCPUClass *pcc =3D POWERPC_CPU_GET_CLASS(cpu); + + if (pvr =3D=3D pcc->pvr) { + return true; + } + if (pcc->pvr_match) { + return pcc->pvr_match(pcc, pvr); + } + return false; +} + static int cpu_post_load(void *opaque, int version_id) { PowerPCCPU *cpu =3D opaque; @@ -203,10 +228,31 @@ static int cpu_post_load(void *opaque, int version_id) target_ulong msr; =20 /* - * We always ignore the source PVR. The user or management - * software has to take care of running QEMU in a compatible mode. + * If we're operating in compat mode, we should be ok as long as + * the destination supports the same compatiblity mode. + * + * Otherwise, however, we require that the destination has exactly + * the same CPU model as the source. */ - env->spr[SPR_PVR] =3D env->spr_cb[SPR_PVR].default_value; + +#if defined(TARGET_PPC64) + if (cpu->compat_pvr) { + Error *local_err =3D NULL; + + ppc_set_compat(cpu, cpu->compat_pvr, &local_err); + if (local_err) { + error_report_err(local_err); + error_free(local_err); + return -1; + } + } else +#endif + { + if (!pvr_match(cpu, env->spr[SPR_PVR])) { + return -1; + } + } + env->lr =3D env->spr[SPR_LR]; env->ctr =3D env->spr[SPR_CTR]; cpu_write_xer(env, env->spr[SPR_XER]); @@ -560,6 +606,24 @@ static const VMStateDescription vmstate_tlbmas =3D { } }; =20 +static bool compat_needed(void *opaque) +{ + PowerPCCPU *cpu =3D opaque; + + return cpu->vhyp !=3D NULL; +} + +static const VMStateDescription vmstate_compat =3D { + .name =3D "cpu/compat", + .version_id =3D 1, + .minimum_version_id =3D 1, + .needed =3D compat_needed, + .fields =3D (VMStateField[]) { + VMSTATE_UINT32(compat_pvr, PowerPCCPU), + VMSTATE_END_OF_LIST() + } +}; + const VMStateDescription vmstate_ppc_cpu =3D { .name =3D "cpu", .version_id =3D 5, @@ -613,6 +677,7 @@ const VMStateDescription vmstate_ppc_cpu =3D { &vmstate_tlb6xx, &vmstate_tlbemb, &vmstate_tlbmas, + &vmstate_compat, NULL } }; --=20 2.9.3