From patchwork Tue Feb 7 19:42:01 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Edgar E. Iglesias" X-Patchwork-Id: 9560957 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C58036047A for ; Tue, 7 Feb 2017 19:44:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B5DD128446 for ; Tue, 7 Feb 2017 19:44:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A6E8B28485; Tue, 7 Feb 2017 19:44:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.6 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, RCVD_IN_SORBS_SPAM, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2BC2528446 for ; Tue, 7 Feb 2017 19:44:16 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cbBeW-0002NM-Tf; Tue, 07 Feb 2017 19:42:12 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cbBeW-0002Mk-2I for xen-devel@lists.xen.org; Tue, 07 Feb 2017 19:42:12 +0000 Received: from [85.158.139.211] by server-1.bemta-5.messagelabs.com id 63/43-01971-3132A985; Tue, 07 Feb 2017 19:42:11 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrNIsWRWlGSWpSXmKPExsVyMfS6s66Q8qw Ig7uvDS2WfFzM4sDocXT3b6YAxijWzLyk/IoE1ozO54tZCvYJVXy8co25gbGLv4uRi0NIYAKj xLYTc9hBHBaBlywSL2f8YQJxJAT6WSV2Nn1m7GLkBHJiJOZuXcUGYZdLLJ11kRnEFhJQlzj9b gcbhD2DSWLeJgkQm03ARGLvnwdMILaIgLTEtc+XweYwC/hK3Nx5HCwuLGAq0f//H2sXIwfQZl WJj/1yIGFeAQ+J91eamSFWyUncPNcJZnMKeEp8WT6RBWKVh8T8lasYJzAKLGBkWMWoUZxaVJZ apGtsoJdUlJmeUZKbmJmja2hgqpebWlycmJ6ak5hUrJecn7uJERhY9QwMjDsYJ6zyO8QoycGk JMpbKTArQogvKT+lMiOxOCO+qDQntfgQowwHh5IEb6QSUE6wKDU9tSItMwcY4jBpCQ4eJRHeC JA0b3FBYm5xZjpE6hSjJUdP1+mXTBynboDIPbsuv2QSYsnLz0uVEue9rAjUIADSkFGaBzcOFo eXGGWlhHkZGRgYhHgKUotyM0tQ5V8xinMwKgnz2oCs5cnMK4Hb+groICagg7ZdmQZyUEkiQkq qgbH1yjrt3KSCT2HBcbs6LBPUGzp07p9elu05U3m9xjfVnr6rf9lWerg/tzrld9SvLpLPNvHm zmInvg/c0uoyjBe+PqupX9e23oZT6tyR1P9+a8WNZurmTlntwpG5ykNx467eWfEvFyq8crW5I +9+hb3u9ll/Np3271kWB2QM5fZY3lpw0fU6qxJLcUaioRZzUXEiAMsP11y+AgAA X-Env-Sender: edgar.iglesias@gmail.com X-Msg-Ref: server-11.tower-206.messagelabs.com!1486496530!65963623!1 X-Originating-IP: [209.85.215.67] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 9.1.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 65460 invoked from network); 7 Feb 2017 19:42:10 -0000 Received: from mail-lf0-f67.google.com (HELO mail-lf0-f67.google.com) (209.85.215.67) by server-11.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 7 Feb 2017 19:42:10 -0000 Received: by mail-lf0-f67.google.com with SMTP id q89so7529726lfi.1 for ; Tue, 07 Feb 2017 11:42:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Ruw6vM593WUO7ocsmUIu93R4z/jKrf6kjl/tnsLJ4Fk=; b=BhNVe7x9QtLFe7tiHH7bX6m11oQkGvqV8bjPhH6rup+rlredNN/yENaVE7yTMLTIY4 4iuS/fR5uRlMQsyrerQykp5KX/UJ0EaafzaLV9tH3qSgwRxRvJHkkpJteL3Z70ZXgRMW cZC8pPBvIw1GueHIbqmCHl/2J9uHyqvfaJi4dtYN60btWdZwHZAGoxBjFCJ5cfgSla4b xE+leMHChvn8wf0O8/+7Kg5HqhPVhT/a+3rO950hhRBxLcO9uIfbWCwZAwwpCEqETu9J HK3ipdlrWW1ZEq2m+iTbx/P1LYqjIOlfFLBhYDdVGNgZfbVTmzf1YAmbJdj8j0YQVQ5o e/Zw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Ruw6vM593WUO7ocsmUIu93R4z/jKrf6kjl/tnsLJ4Fk=; b=mZO8Mvl6Ual68iuDEcXpYQL76QixPQhvFcMl9rKH3tuRHqy/ysQ0cyVfOex6DHWCBX rj7UCyvoiSNkY/6DdWkITax/STpElDTBZCv9rROWEUNpuxUIHd1bKcyjUUGl1WUewnZ3 jw7qCWU0A2LtLY7zMQvxztya7CpjEYkRMir01isTJDnVLWLLoJi3qlEbOeDKlAAkMaZG 0uW4hkJsEaZ2pTZA41vWVCRZTR8gUn6UUWdIHsF8BpRY8AaonUOXStlb+LUbqUh/IvKg /PJpukdKue6Dv9q7DyMlb/kM9vDM+B6q9ybLkUw3UzWy5KBM9YlxpvkUGfB06KwGSgsq Jv3A== X-Gm-Message-State: AIkVDXL9rowL/BWhu8yHvavxsEzu+J8KjkyhOD5fFp6FIPVHLWO8RTJGx0cjLk2fqoC8yw== X-Received: by 10.25.79.79 with SMTP id a15mr6491738lfk.58.1486496530128; Tue, 07 Feb 2017 11:42:10 -0800 (PST) Received: from localhost (81-231-233-234-no56.tbcn.telia.com. [81.231.233.234]) by smtp.gmail.com with ESMTPSA id j11sm1611278lfd.23.2017.02.07.11.42.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 07 Feb 2017 11:42:09 -0800 (PST) From: "Edgar E. Iglesias" To: xen-devel@lists.xen.org Date: Tue, 7 Feb 2017 20:42:01 +0100 Message-Id: <1486496525-14637-3-git-send-email-edgar.iglesias@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1486496525-14637-1-git-send-email-edgar.iglesias@gmail.com> References: <1486496525-14637-1-git-send-email-edgar.iglesias@gmail.com> Cc: edgar.iglesias@xilinx.com, julien.grall@arm.com, sstabellini@kernel.org Subject: [Xen-devel] [RFC v2 2/6] xen/arm: Introduce platform_hvc X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: "Edgar E. Iglesias" Introduce platform_hvc as a way to handle hypercalls that Xen does not know about in a platform specific way. This is particularly useful for implementing the SiP (SoC implementation specific) service calls. Signed-off-by: Edgar E. Iglesias --- xen/arch/arm/platform.c | 8 ++++++++ xen/arch/arm/traps.c | 3 +++ xen/include/asm-arm/platform.h | 5 +++++ 3 files changed, 16 insertions(+) diff --git a/xen/arch/arm/platform.c b/xen/arch/arm/platform.c index 0af6d57..90ea6b8 100644 --- a/xen/arch/arm/platform.c +++ b/xen/arch/arm/platform.c @@ -127,6 +127,14 @@ void platform_poweroff(void) platform->poweroff(); } +bool platform_hvc(struct cpu_user_regs *regs) +{ + if ( platform && platform->hvc ) + return platform->hvc(regs); + + return false; +} + bool_t platform_has_quirk(uint32_t quirk) { uint32_t quirks = 0; diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c index c5a4d41..33950d9 100644 --- a/xen/arch/arm/traps.c +++ b/xen/arch/arm/traps.c @@ -44,6 +44,7 @@ #include #include #include +#include #include "decode.h" #include "vtimer.h" @@ -1430,6 +1431,8 @@ static void do_trap_psci(struct cpu_user_regs *regs) } break; default: + if ( platform_hvc(regs) ) + return; domain_crash_synchronous(); return; } diff --git a/xen/include/asm-arm/platform.h b/xen/include/asm-arm/platform.h index 08010ba..4d51f0a 100644 --- a/xen/include/asm-arm/platform.h +++ b/xen/include/asm-arm/platform.h @@ -26,6 +26,10 @@ struct platform_desc { void (*reset)(void); /* Platform power-off */ void (*poweroff)(void); + /* Platform specific HVC handler. + * Returns true if the call was handled and false if not. + */ + bool (*hvc)(struct cpu_user_regs *regs); /* * Platform quirks * Defined has a function because a platform can support multiple @@ -55,6 +59,7 @@ int platform_cpu_up(int cpu); #endif void platform_reset(void); void platform_poweroff(void); +bool platform_hvc(struct cpu_user_regs *regs); bool_t platform_has_quirk(uint32_t quirk); bool_t platform_device_is_blacklisted(const struct dt_device_node *node);