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[2003:fa:af0b:b200:9c49:4783:8afc:41b6]) by smtp.gmail.com with ESMTPSA id 18-20020a170906201200b00846734faa9asm3925625ejo.164.2023.01.09.09.25.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Jan 2023 09:25:02 -0800 (PST) From: Bernhard Beschow To: qemu-devel@nongnu.org Cc: John G Johnson , Richard Henderson , Igor Mammedov , Elena Ufimtseva , Ani Sinha , Eduardo Habkost , Gerd Hoffmann , Jagannathan Raman , "Michael S. Tsirkin" , Paolo Bonzini , John Snow , Aurelien Jarno , qemu-ppc@nongnu.org, Jiaxun Yang , qemu-block@nongnu.org, Peter Maydell , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , =?utf-8?q?Phil?= =?utf-8?q?ippe_Mathieu-Daud=C3=A9?= , Marcel Apfelbaum , qemu-arm@nongnu.org, =?utf-8?q?Herv=C3=A9_Poussineau?= , Bernhard Beschow , Mark Cave-Ayland Subject: [PATCH v6 10/33] hw/intc/i8259: Introduce i8259 proxy TYPE_ISA_PIC Date: Mon, 9 Jan 2023 18:23:23 +0100 Message-Id: <20230109172347.1830-11-shentey@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230109172347.1830-1-shentey@gmail.com> References: <20230109172347.1830-1-shentey@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::636; envelope-from=shentey@gmail.com; helo=mail-ej1-x636.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, FREEMAIL_FROM=0.001, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Having an i8259 proxy allows for ISA PICs to be created and wired up in southbridges. This is especially interesting for PIIX3 for two reasons: First, the southbridge doesn't need to care about the virtualization technology used (KVM, TCG, Xen) due to in-IRQs (where devices get attached) and out-IRQs (which will trigger the IRQs of the respective virtualization technology) are separated. Second, since the in-IRQs are populated with fully initialized qemu_irq's, they can already be wired up inside PIIX3. Cc: Mark Cave-Ayland Signed-off-by: Bernhard Beschow Reviewed-by: Michael S. Tsirkin Reviewed-by: Mark Cave-Ayland Reviewed-by: Philippe Mathieu-Daudé --- include/hw/intc/i8259.h | 18 ++++++++++++++++++ hw/intc/i8259.c | 27 +++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/include/hw/intc/i8259.h b/include/hw/intc/i8259.h index a0e34dd990..7fb403971c 100644 --- a/include/hw/intc/i8259.h +++ b/include/hw/intc/i8259.h @@ -1,6 +1,24 @@ #ifndef HW_I8259_H #define HW_I8259_H +#include "qom/object.h" +#include "hw/isa/isa.h" +#include "qemu/typedefs.h" + +#define TYPE_ISA_PIC "isa-pic" +OBJECT_DECLARE_SIMPLE_TYPE(ISAPICState, ISA_PIC) + +/* + * TYPE_ISA_PIC is currently a PIC proxy which allows for interrupt wiring in + * a virtualization technology agnostic way. + */ +struct ISAPICState { + DeviceState parent_obj; + + qemu_irq in_irqs[ISA_NUM_IRQS]; + qemu_irq out_irqs[ISA_NUM_IRQS]; +}; + /* i8259.c */ extern PICCommonState *isa_pic; diff --git a/hw/intc/i8259.c b/hw/intc/i8259.c index 0261f087b2..e99d02136d 100644 --- a/hw/intc/i8259.c +++ b/hw/intc/i8259.c @@ -455,9 +455,36 @@ static const TypeInfo i8259_info = { .class_size = sizeof(PICClass), }; +static void isapic_set_irq(void *opaque, int irq, int level) +{ + ISAPICState *s = opaque; + + qemu_set_irq(s->out_irqs[irq], level); +} + +static void isapic_init(Object *obj) +{ + ISAPICState *s = ISA_PIC(obj); + + qdev_init_gpio_in(DEVICE(s), isapic_set_irq, ISA_NUM_IRQS); + qdev_init_gpio_out(DEVICE(s), s->out_irqs, ISA_NUM_IRQS); + + for (int i = 0; i < ISA_NUM_IRQS; ++i) { + s->in_irqs[i] = qdev_get_gpio_in(DEVICE(s), i); + } +} + +static const TypeInfo isapic_info = { + .name = TYPE_ISA_PIC, + .parent = TYPE_DEVICE, + .instance_size = sizeof(ISAPICState), + .instance_init = isapic_init, +}; + static void pic_register_types(void) { type_register_static(&i8259_info); + type_register_static(&isapic_info); } type_init(pic_register_types)