From patchwork Thu Dec 10 14:28:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Przywara X-Patchwork-Id: 11966011 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56CC5C433FE for ; Thu, 10 Dec 2020 19:29:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0994722EBE for ; Thu, 10 Dec 2020 19:29:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390301AbgLJT3K (ORCPT ); Thu, 10 Dec 2020 14:29:10 -0500 Received: from foss.arm.com ([217.140.110.172]:44788 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390264AbgLJOaK (ORCPT ); Thu, 10 Dec 2020 09:30:10 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 928F71396; Thu, 10 Dec 2020 06:29:24 -0800 (PST) Received: from donnerap.arm.com (donnerap.cambridge.arm.com [10.1.195.35]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 772623F718; Thu, 10 Dec 2020 06:29:23 -0800 (PST) From: Andre Przywara To: Will Deacon , Julien Thierry Cc: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, Alexandru Elisei , Marc Zyngier Subject: [PATCH kvmtool 02/21] hw/serial: Use device abstraction for FDT generator function Date: Thu, 10 Dec 2020 14:28:49 +0000 Message-Id: <20201210142908.169597-3-andre.przywara@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201210142908.169597-1-andre.przywara@arm.com> References: <20201210142908.169597-1-andre.przywara@arm.com> Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org At the moment we use the .generate_fdt_node member of the ioport ops structure to store the function pointer for the FDT node generator function. ioport__register() will then put a wrapper and this pointer into the device header. The serial device is the only device making use of this special ioport feature, so let's move this over to using the device header directly. This will allow us to get rid of this .generate_fdt_node member in the ops and simplify the code. Signed-off-by: Andre Przywara Reviewed-by: Alexandru Elisei --- hw/serial.c | 49 +++++++++++++++++++++++++++++++++++++---------- include/kvm/kvm.h | 2 ++ 2 files changed, 41 insertions(+), 10 deletions(-) diff --git a/hw/serial.c b/hw/serial.c index 13c4663e..b0465d99 100644 --- a/hw/serial.c +++ b/hw/serial.c @@ -23,6 +23,7 @@ #define UART_IIR_TYPE_BITS 0xc0 struct serial8250_device { + struct device_header dev_hdr; struct mutex mutex; u8 id; @@ -53,9 +54,20 @@ struct serial8250_device { .msr = UART_MSR_DCD | UART_MSR_DSR | UART_MSR_CTS, \ .mcr = UART_MCR_OUT2, +#ifdef CONFIG_HAS_LIBFDT +static +void serial8250_generate_fdt_node(void *fdt, struct device_header *dev_hdr, + fdt_irq_fn irq_fn); +#else +#define serial8250_generate_fdt_node NULL +#endif static struct serial8250_device devices[] = { /* ttyS0 */ [0] = { + .dev_hdr = { + .bus_type = DEVICE_BUS_IOPORT, + .data = serial8250_generate_fdt_node, + }, .mutex = MUTEX_INITIALIZER, .id = 0, @@ -66,6 +78,10 @@ static struct serial8250_device devices[] = { }, /* ttyS1 */ [1] = { + .dev_hdr = { + .bus_type = DEVICE_BUS_IOPORT, + .data = serial8250_generate_fdt_node, + }, .mutex = MUTEX_INITIALIZER, .id = 1, @@ -76,6 +92,10 @@ static struct serial8250_device devices[] = { }, /* ttyS2 */ [2] = { + .dev_hdr = { + .bus_type = DEVICE_BUS_IOPORT, + .data = serial8250_generate_fdt_node, + }, .mutex = MUTEX_INITIALIZER, .id = 2, @@ -86,6 +106,10 @@ static struct serial8250_device devices[] = { }, /* ttyS3 */ [3] = { + .dev_hdr = { + .bus_type = DEVICE_BUS_IOPORT, + .data = serial8250_generate_fdt_node, + }, .mutex = MUTEX_INITIALIZER, .id = 3, @@ -371,13 +395,14 @@ char *fdt_stdout_path = NULL; #define DEVICE_NAME_MAX_LEN 32 static -void serial8250_generate_fdt_node(struct ioport *ioport, void *fdt, - void (*generate_irq_prop)(void *fdt, - u8 irq, - enum irq_type)) +void serial8250_generate_fdt_node(void *fdt, struct device_header *dev_hdr, + fdt_irq_fn irq_fn) { char dev_name[DEVICE_NAME_MAX_LEN]; - struct serial8250_device *dev = ioport->priv; + struct serial8250_device *dev = container_of(dev_hdr, + struct serial8250_device, + dev_hdr); + u64 addr = KVM_IOPORT_AREA + dev->iobase; u64 reg_prop[] = { cpu_to_fdt64(addr), @@ -395,24 +420,26 @@ void serial8250_generate_fdt_node(struct ioport *ioport, void *fdt, _FDT(fdt_begin_node(fdt, dev_name)); _FDT(fdt_property_string(fdt, "compatible", "ns16550a")); _FDT(fdt_property(fdt, "reg", reg_prop, sizeof(reg_prop))); - generate_irq_prop(fdt, dev->irq, IRQ_TYPE_LEVEL_HIGH); + irq_fn(fdt, dev->irq, IRQ_TYPE_LEVEL_HIGH); _FDT(fdt_property_cell(fdt, "clock-frequency", 1843200)); _FDT(fdt_end_node(fdt)); } -#else -#define serial8250_generate_fdt_node NULL #endif static struct ioport_operations serial8250_ops = { .io_in = serial8250_in, .io_out = serial8250_out, - .generate_fdt_node = serial8250_generate_fdt_node, }; -static int serial8250__device_init(struct kvm *kvm, struct serial8250_device *dev) +static int serial8250__device_init(struct kvm *kvm, + struct serial8250_device *dev) { int r; + r = device__register(&dev->dev_hdr); + if (r < 0) + return r; + ioport__map_irq(&dev->irq); r = ioport__register(kvm, dev->iobase, &serial8250_ops, 8, dev); @@ -438,6 +465,7 @@ cleanup: struct serial8250_device *dev = &devices[j]; ioport__unregister(kvm, dev->iobase); + device__unregister(&dev->dev_hdr); } return r; @@ -455,6 +483,7 @@ int serial8250__exit(struct kvm *kvm) r = ioport__unregister(kvm, dev->iobase); if (r < 0) return r; + device__unregister(&dev->dev_hdr); } return 0; diff --git a/include/kvm/kvm.h b/include/kvm/kvm.h index 53373b08..ee99c28e 100644 --- a/include/kvm/kvm.h +++ b/include/kvm/kvm.h @@ -31,6 +31,8 @@ .name = #ext, \ .code = ext +typedef void (*fdt_irq_fn)(void *fdt, u8 irq, enum irq_type); + enum { KVM_VMSTATE_RUNNING, KVM_VMSTATE_PAUSED,