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Wed, 03 Jul 2024 02:46:37 -0700 (PDT) Received: from grind.dc1.ventanamicro.com ([179.193.8.43]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2c91d3bc5a1sm10278621a91.36.2024.07.03.02.46.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Jul 2024 02:46:37 -0700 (PDT) From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com, richard.henderson@linaro.org, berrange@redhat.com, eduardo@habkost.net, Daniel Henrique Barboza , Andrew Jones Subject: [PATCH 2/2] qdev, accel-system: add support to Accel globals Date: Wed, 3 Jul 2024 06:46:26 -0300 Message-ID: <20240703094626.1704990-3-dbarboza@ventanamicro.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240703094626.1704990-1-dbarboza@ventanamicro.com> References: <20240703094626.1704990-1-dbarboza@ventanamicro.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::1036; envelope-from=dbarboza@ventanamicro.com; helo=mail-pj1-x1036.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org We're not honouring KVM options that are provided by any -accel option aside from the first. In this example: qemu-system-riscv64 -accel kvm,riscv-aia=emul (...) \ -accel kvm,riscv-aia=hwaccel 'riscv-aia' will be set to 'emul', ignoring the last occurrence of the option that set 'riscv-aia' to 'hwaccel'. A failed attempt to solve this issue by setting 'merge_lists' can be found in [1]. A different approach was suggested in [2]: enable global properties for accelerators. This allows an user to override any accel setting by using '-global' and we won't need to change how '-accel' opts are handled. This is done by calling qdev_prop_set_globals() in accel_init_machine(). As done in device_post_init(), user's global props take precedence over compat props so qdev_prop_set_globals() is called after object_set_accelerator_compat_props(). qdev_prop_check_globals() is then changed to recognize TYPE_ACCEL globals as valid. Re-using the fore-mentioned example we'll be able to set riscv-aia=hwaccel by doing the following: qemu-system-riscv64 -accel kvm,riscv-aia=emul (...) \ -global kvm-accel.riscv-aia=hwaccel [1] https://lore.kernel.org/qemu-devel/20240701133038.1489043-1-dbarboza@ventanamicro.com/ [2] https://lore.kernel.org/qemu-devel/CABgObfbVJkCdpHV2uA7LGTbYEaoaizrbeG0vNo_T1ua5b=jq7Q@mail.gmail.com/ Reported-by: Andrew Jones Suggested-by: Paolo Bonzini Signed-off-by: Daniel Henrique Barboza --- accel/accel-system.c | 3 +++ hw/core/qdev-properties.c | 34 +++++++++++++++++++++++----------- 2 files changed, 26 insertions(+), 11 deletions(-) diff --git a/accel/accel-system.c b/accel/accel-system.c index f6c947dd82..40c73ec62f 100644 --- a/accel/accel-system.c +++ b/accel/accel-system.c @@ -29,6 +29,8 @@ #include "sysemu/cpus.h" #include "qemu/error-report.h" #include "accel-system.h" +#include "qapi/error.h" +#include "hw/qdev-properties.h" int accel_init_machine(AccelState *accel, MachineState *ms) { @@ -43,6 +45,7 @@ int accel_init_machine(AccelState *accel, MachineState *ms) object_unref(OBJECT(accel)); } else { object_set_accelerator_compat_props(acc->compat_props); + qdev_prop_set_globals(OBJECT(accel), &error_fatal); } return ret; } diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c index 4867d7dd9e..462a8f96e0 100644 --- a/hw/core/qdev-properties.c +++ b/hw/core/qdev-properties.c @@ -10,6 +10,7 @@ #include "qemu/cutils.h" #include "qdev-prop-internal.h" #include "qom/qom-qobject.h" +#include "qemu/accel.h" void qdev_prop_set_after_realize(DeviceState *dev, const char *name, Error **errp) @@ -894,27 +895,38 @@ int qdev_prop_check_globals(void) for (i = 0; i < global_props()->len; i++) { GlobalProperty *prop; - ObjectClass *oc; + ObjectClass *globalc, *oc; DeviceClass *dc; prop = g_ptr_array_index(global_props(), i); if (prop->used) { continue; } - oc = object_class_by_name(prop->driver); - oc = object_class_dynamic_cast(oc, TYPE_DEVICE); - if (!oc) { - warn_report("global %s.%s has invalid class name", - prop->driver, prop->property); - ret = 1; + globalc = object_class_by_name(prop->driver); + oc = object_class_dynamic_cast(globalc, TYPE_DEVICE); + if (oc) { + dc = DEVICE_CLASS(oc); + if (!dc->hotpluggable && !prop->used) { + warn_report("global %s.%s=%s not used", + prop->driver, prop->property, prop->value); + ret = 1; + } continue; } - dc = DEVICE_CLASS(oc); - if (!dc->hotpluggable && !prop->used) { + + /* + * At this point is either an accelerator global that is + * unused or an invalid global. Both set ret = 1. + */ + ret = 1; + + oc = object_class_dynamic_cast(globalc, TYPE_ACCEL); + if (oc) { warn_report("global %s.%s=%s not used", prop->driver, prop->property, prop->value); - ret = 1; - continue; + } else { + warn_report("global %s.%s has invalid class name", + prop->driver, prop->property); } } return ret;