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=-9.3 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 94982C2BA12 for ; Fri, 3 Apr 2020 13:53:34 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 44CD3206E9 for ; Fri, 3 Apr 2020 13:53:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="qAHW1Yit" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 44CD3206E9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 48v1cB35qpzDqcQ for ; Sat, 4 Apr 2020 00:53:30 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:4864:20::541; helo=mail-pg1-x541.google.com; envelope-from=npiggin@gmail.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=qAHW1Yit; dkim-atps=neutral Received: from mail-pg1-x541.google.com (mail-pg1-x541.google.com [IPv6:2607:f8b0:4864:20::541]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 48v11c5xndzDrfT for ; Sat, 4 Apr 2020 00:27:00 +1100 (AEDT) Received: by mail-pg1-x541.google.com with SMTP id c23so3515617pgj.3 for ; Fri, 03 Apr 2020 06:27:00 -0700 (PDT) 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 :mime-version:content-transfer-encoding; bh=rFpUU+o0mzvW30vjII+BqNpnNgyGiMXC6vjgaoJYz/A=; b=qAHW1YitfbFANghV1k8Qo077xx3mCXz6Kz6WOKehcgfNKVGZB9me+pNmesbYsRdXRh Se15WSARlcXJiuAMJ+B9w6RjC3C//870h3UgguxxKMxnmD07c0FxDLNeJqisKw6GgT51 2lb7l617RJPf8mTmTI77csBlmLNpErxYw0TB5hPRDUV6IISl9rQAc9dsyba2vg9G5rmR jHC6TnmLp3QiDxQDslR6+1qJRQu2mFPfv2wcTi1RZ3Bgr4AsMn+X03WKazmT8iwA/Rkp kZfCWSlWQxLDHaFjiSsJ14hrLrfFQx81W6F6iZ2+p0j9v4WaEZxJYAhUEf5a5nXLd2Rr qnfw== 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:mime-version:content-transfer-encoding; bh=rFpUU+o0mzvW30vjII+BqNpnNgyGiMXC6vjgaoJYz/A=; b=LXZA1FOeodQwJNCJjbMCRroyCLY894HqLiEqSK1wwvk6jt7jPhBBBaxW1KwDMtZhR3 cciHbF4TRzz5IGlcE+odXQLDNFK4GV4hrMWPYeYuOrWYCfoqmALZDMttbvjf0S3djLpH x69TkWaTCiFzExnUseslqkIRGcL+YbXKsufX/0WDLYZNDDIgHZ/NQrYlTnadvjMkj/7Y /QgxbLhWfXLQcVStVsPyNfs15yHAMA39cPBSpOON3RJAxD0DS1ZutftQlNqCWScqiCIn q4ZmzzDi+Hw7BSb7eQ9e7fvLTkYdM9II/Z8RabDW1yvAxf8UEWKa6F56C1zpLuxYL8oc Ap+g== X-Gm-Message-State: AGi0PubRJD+2te/p6A+Byn4q0s0u4EvhulO3p4KAQc1sNchi2ynivEDd /9WamfN+h21yBCqYsyAE2aZGvkyu X-Google-Smtp-Source: APiQypKrrQxn9KADeGqymB7ZsQkRrLQwYSOCVMjzQBV298pIyEYYDjaR6pWgHzjacPPe3X9sRzIiDQ== X-Received: by 2002:a65:5881:: with SMTP id d1mr8183378pgu.378.1585920417467; Fri, 03 Apr 2020 06:26:57 -0700 (PDT) Received: from bobo.ozlabs.ibm.com (60-241-117-97.tpgi.com.au. [60.241.117.97]) by smtp.gmail.com with ESMTPSA id o65sm5941422pfg.187.2020.04.03.06.26.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Apr 2020 06:26:57 -0700 (PDT) From: Nicholas Piggin To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 05/14] powerpc/pseries/ras: avoid calling rtas_token in NMI paths Date: Fri, 3 Apr 2020 23:26:13 +1000 Message-Id: <20200403132622.130394-6-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200403132622.130394-1-npiggin@gmail.com> References: <20200403132622.130394-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mahesh Salgaonkar , Ganesh Goudar , Mahesh Salgaonkar , Nicholas Piggin Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" In the interest of reducing code and possible failures in the machine check and system reset paths, grab the "ibm,nmi-interlock" token at init time. Reviewed-by: Mahesh Salgaonkar Signed-off-by: Nicholas Piggin --- arch/powerpc/include/asm/firmware.h | 1 + arch/powerpc/platforms/pseries/ras.c | 2 +- arch/powerpc/platforms/pseries/setup.c | 13 ++++++++++--- 3 files changed, 12 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/include/asm/firmware.h b/arch/powerpc/include/asm/firmware.h index ca33f4ef6cb4..6003c2e533a0 100644 --- a/arch/powerpc/include/asm/firmware.h +++ b/arch/powerpc/include/asm/firmware.h @@ -128,6 +128,7 @@ extern void machine_check_fwnmi(void); /* This is true if we are using the firmware NMI handler (typically LPAR) */ extern int fwnmi_active; +extern int ibm_nmi_interlock_token; extern unsigned int __start___fw_ftr_fixup, __stop___fw_ftr_fixup; diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c index 1d7f973c647b..c74d5e740922 100644 --- a/arch/powerpc/platforms/pseries/ras.c +++ b/arch/powerpc/platforms/pseries/ras.c @@ -458,7 +458,7 @@ static struct rtas_error_log *fwnmi_get_errinfo(struct pt_regs *regs) */ static void fwnmi_release_errinfo(void) { - int ret = rtas_call(rtas_token("ibm,nmi-interlock"), 0, 1, NULL); + int ret = rtas_call(ibm_nmi_interlock_token, 0, 1, NULL); if (ret != 0) printk(KERN_ERR "FWNMI: nmi-interlock failed: %d\n", ret); } diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 0c8421dd01ab..b582198be284 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -83,6 +83,7 @@ unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT_4K); EXPORT_SYMBOL(CMO_PageSize); int fwnmi_active; /* TRUE if an FWNMI handler is present */ +int ibm_nmi_interlock_token; static void pSeries_show_cpuinfo(struct seq_file *m) { @@ -113,9 +114,14 @@ static void __init fwnmi_init(void) struct slb_entry *slb_ptr; size_t size; #endif + int ibm_nmi_register_token; - int ibm_nmi_register = rtas_token("ibm,nmi-register"); - if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE) + ibm_nmi_register_token = rtas_token("ibm,nmi-register"); + if (ibm_nmi_register_token == RTAS_UNKNOWN_SERVICE) + return; + + ibm_nmi_interlock_token = rtas_token("ibm,nmi-interlock"); + if (WARN_ON(ibm_nmi_interlock_token == RTAS_UNKNOWN_SERVICE)) return; /* If the kernel's not linked at zero we point the firmware at low @@ -123,7 +129,8 @@ static void __init fwnmi_init(void) system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START; machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START; - if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr, + if (0 == rtas_call(ibm_nmi_register_token, 2, 1, NULL, + system_reset_addr, machine_check_addr)) fwnmi_active = 1; -- 2.23.0