From patchwork Fri May 29 17:45:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Paul Adrian Glaubitz X-Patchwork-Id: 11579439 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E974B1392 for ; Fri, 29 May 2020 17:46:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D9D1F206A4 for ; Fri, 29 May 2020 17:46:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726944AbgE2RqJ (ORCPT ); Fri, 29 May 2020 13:46:09 -0400 Received: from outpost17.zedat.fu-berlin.de ([130.133.4.110]:47365 "EHLO outpost17.zedat.fu-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727053AbgE2RqI (ORCPT ); Fri, 29 May 2020 13:46:08 -0400 Received: from relay1.zedat.fu-berlin.de ([130.133.4.67]) by outpost.zedat.fu-berlin.de (Exim 4.93) with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (envelope-from ) id 1jej4z-002ywz-Fg; Fri, 29 May 2020 19:46:01 +0200 Received: from z6.physik.fu-berlin.de ([160.45.32.137] helo=z6) by relay1.zedat.fu-berlin.de (Exim 4.93) with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (envelope-from ) id 1jej4z-001JW2-Dp; Fri, 29 May 2020 19:46:01 +0200 Received: from glaubitz by z6 with local (Exim 4.93) (envelope-from ) id 1jej4s-00HaMe-0i; Fri, 29 May 2020 19:45:54 +0200 From: John Paul Adrian Glaubitz To: linux-sh@vger.kernel.org Cc: Rich Felker , Yoshinori Sato , Geert Uytterhoeven , Michael Karcher , linux-kernel@vger.kernel.org, John Paul Adrian Glaubitz Subject: [PATCH] sh: Implement __get_user_u64() required for 64-bit get_user() Date: Fri, 29 May 2020 19:45:41 +0200 Message-Id: <20200529174540.4189874-2-glaubitz@physik.fu-berlin.de> X-Mailer: git-send-email 2.27.0.rc2 In-Reply-To: <20200529174540.4189874-1-glaubitz@physik.fu-berlin.de> References: <20200529174540.4189874-1-glaubitz@physik.fu-berlin.de> MIME-Version: 1.0 X-Originating-IP: 160.45.32.137 X-ZEDAT-Hint: RV Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org Trying to build the kernel with CONFIG_INFINIBAND_USER_ACCESS enabled fails ERROR: "__get_user_unknown" [drivers/infiniband/core/ib_uverbs.ko] undefined! with on SH since the kernel misses a 64-bit implementation of get_user(). Implement the missing 64-bit get_user() as __get_user_u64(), matching the already existing __put_user_u64() which implements the 64-bit put_user(). Signed-off-by: John Paul Adrian Glaubitz --- arch/sh/include/asm/uaccess_32.h | 49 ++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/arch/sh/include/asm/uaccess_32.h b/arch/sh/include/asm/uaccess_32.h index 624cf55acc27..8bc1cb50f8bf 100644 --- a/arch/sh/include/asm/uaccess_32.h +++ b/arch/sh/include/asm/uaccess_32.h @@ -26,6 +26,9 @@ do { \ case 4: \ __get_user_asm(x, ptr, retval, "l"); \ break; \ + case 8: \ + __get_user_u64(x, ptr, retval); \ + break; \ default: \ __get_user_unknown(); \ break; \ @@ -66,6 +69,52 @@ do { \ extern void __get_user_unknown(void); +#if defined(CONFIG_CPU_LITTLE_ENDIAN) +#define __get_user_u64(x, addr, err) \ +({ \ +__asm__ __volatile__( \ + "1:\n\t" \ + "mov.l %2,%R1\n\t" \ + "mov.l %T2,%S1\n\t" \ + "2:\n" \ + ".section .fixup,\"ax\"\n" \ + "3:\n\t" \ + "mov #0, %1\n\t" \ + "mov.l 4f, %0\n\t" \ + "jmp @%0\n\t" \ + " mov %3, %0\n\t" \ + ".balign 4\n" \ + "4: .long 2b\n\t" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n\t" \ + ".long 1b, 3b\n\t" \ + ".previous" \ + :"=&r" (err), "=&r" (x) \ + :"m" (__m(addr)), "i" (-EFAULT), "0" (err)); }) +#else +#define __get_user_u64(x, addr, err) \ +({ \ +__asm__ __volatile__( \ + "1:\n\t" \ + "mov.l %2,%S1\n\t" \ + "mov.l %T2,%R1\n\t" \ + "2:\n" \ + ".section .fixup,\"ax\"\n" \ + "3:\n\t" \ + "mov #0, %1\n\t" \ + "mov.l 4f, %0\n\t" \ + "jmp @%0\n\t" \ + " mov %3, %0\n\t" \ + ".balign 4\n" \ + "4: .long 2b\n\t" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n\t" \ + ".long 1b, 3b\n\t" \ + ".previous" \ + :"=&r" (err), "=&r" (x) \ + :"m" (__m(addr)), "i" (-EFAULT), "0" (err)); }) +#endif + #define __put_user_size(x,ptr,size,retval) \ do { \ retval = 0; \