From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 3949BC43603 for ; Wed, 18 Dec 2019 09:37:05 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0FEB7218AC for ; Wed, 18 Dec 2019 09:37:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0FEB7218AC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=rt-rk.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:51746 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ihVlP-00071e-U9 for qemu-devel@archiver.kernel.org; Wed, 18 Dec 2019 04:37:03 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:44630) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ihVjw-0005QO-Uf for qemu-devel@nongnu.org; Wed, 18 Dec 2019 04:35:34 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ihVju-0001BK-Ce for qemu-devel@nongnu.org; Wed, 18 Dec 2019 04:35:32 -0500 Received: from mx2.rt-rk.com ([89.216.37.149]:34219 helo=mail.rt-rk.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ihVju-0005fI-0S for qemu-devel@nongnu.org; Wed, 18 Dec 2019 04:35:30 -0500 Received: from localhost (localhost [127.0.0.1]) by mail.rt-rk.com (Postfix) with ESMTP id 4351B1A153B; Wed, 18 Dec 2019 10:34:20 +0100 (CET) X-Virus-Scanned: amavisd-new at rt-rk.com Received: from rtrkw493-lin.domain.local (rtrkw493-lin.domain.local [10.10.14.93]) by mail.rt-rk.com (Postfix) with ESMTPSA id EBD4F1A1D9B; Wed, 18 Dec 2019 10:34:19 +0100 (CET) From: Filip Bozuta To: qemu-devel@nongnu.org Subject: [PATCH v4 3/6] linux-user: Add support for getting/setting RTC periodic interrupt and epoch using ioctls Date: Wed, 18 Dec 2019 10:34:09 +0100 Message-Id: <1576661652-2870-4-git-send-email-Filip.Bozuta@rt-rk.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1576661652-2870-1-git-send-email-Filip.Bozuta@rt-rk.com> References: <1576661652-2870-1-git-send-email-Filip.Bozuta@rt-rk.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 89.216.37.149 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: laurent@vivier.eu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This patch implements functionalities of following ioctls: RTC_IRQP_READ, RTC_IRQP_SET - Getting/Setting IRQ rate Read and set the frequency for periodic interrupts, for RTCs that support periodic interrupts. The periodic interrupt must be separately enabled or disabled using the RTC_PIE_ON, RTC_PIE_OFF requests. The third ioctl's argument is an unsigned long * or an unsigned long, respectively. The value is the frequency in interrupts per second. The set of allow=E2=80=90 able frequencies is the multiples of two in the range 2 to 8192. Only a privileged process (i.e., one having the CAP_SYS_RESOURCE capability) can set frequencies above the value specified in /proc/sys/dev/rtc/max-user-freq. (This file contains the value 64 by default.) RTC_EPOCH_READ, RTC_EPOCH_SET - Getting/Setting epoch Many RTCs encode the year in an 8-bit register which is either interpreted as an 8-bit binary number or as a BCD number. In both cases, the number is interpreted relative to this RTC's Epoch. The RTC's Epoch is initialized to 1900 on most systems but on Alpha and MIPS it might also be initialized to 1952, 1980, or 2000, depending on the value of an RTC register for the year. With some RTCs, these operations can be used to read or to set the RTC's Epoch, respectively. The third ioctl's argument is an unsigned long * or an unsigned long, respectively, and the value returned (or assigned) is the Epoch. To set the RTC's Epoch the process must be privileged (i.e., have the CAP_SYS_TIME capability). Implementation notes: All ioctls in this patch have a pointer to 'ulong' as their third argument. That is the reason why corresponding parts of added code in linux-user/syscall_defs.h contain special handling related to 'ulong' type: they use 'abi_ulong' type to make sure that ioctl's code is calculated correctly for both 32-bit and 64-bit targets. Also, 'MK_PTR(TYPE_ULONG)' is used for the similar reason in linux-user/ioctls.h. Signed-off-by: Filip Bozuta --- linux-user/ioctls.h | 4 ++++ linux-user/syscall_defs.h | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h index f472794..accbdee 100644 --- a/linux-user/ioctls.h +++ b/linux-user/ioctls.h @@ -81,6 +81,10 @@ IOCTL(RTC_ALM_SET, IOC_W, MK_PTR(MK_STRUCT(STRUCT_rtc_time))) IOCTL(RTC_RD_TIME, IOC_R, MK_PTR(MK_STRUCT(STRUCT_rtc_time))) IOCTL(RTC_SET_TIME, IOC_W, MK_PTR(MK_STRUCT(STRUCT_rtc_time))) + IOCTL(RTC_IRQP_READ, IOC_R, MK_PTR(TYPE_ULONG)) + IOCTL(RTC_IRQP_SET, IOC_W, TYPE_ULONG) + IOCTL(RTC_EPOCH_READ, IOC_R, MK_PTR(TYPE_ULONG)) + IOCTL(RTC_EPOCH_SET, IOC_W, TYPE_ULONG) =20 IOCTL(BLKROSET, IOC_W, MK_PTR(TYPE_INT)) IOCTL(BLKROGET, IOC_R, MK_PTR(TYPE_INT)) diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h index f0bf09d..bbfa935 100644 --- a/linux-user/syscall_defs.h +++ b/linux-user/syscall_defs.h @@ -776,6 +776,10 @@ struct target_pollfd { #define TARGET_RTC_ALM_SET TARGET_IOW('p', 0x07, struct rtc_tim= e) #define TARGET_RTC_RD_TIME TARGET_IOR('p', 0x09, struct rtc_tim= e) #define TARGET_RTC_SET_TIME TARGET_IOW('p', 0x0a, struct rtc_tim= e) +#define TARGET_RTC_IRQP_READ TARGET_IOR('p', 0x0b, abi_ulong) +#define TARGET_RTC_IRQP_SET TARGET_IOW('p', 0x0c, abi_ulong) +#define TARGET_RTC_EPOCH_READ TARGET_IOR('p', 0x0d, abi_ulong) +#define TARGET_RTC_EPOCH_SET TARGET_IOW('p', 0x0e, abi_ulong) =20 #if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_SH4)= || \ defined(TARGET_XTENSA) --=20 2.7.4