From patchwork Wed Dec 7 21:48:14 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tyler Baicar X-Patchwork-Id: 9465341 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 39961607D2 for ; Wed, 7 Dec 2016 21:51:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 204682858A for ; Wed, 7 Dec 2016 21:51:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 14E562858D; Wed, 7 Dec 2016 21:51:42 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8EADE2858A for ; Wed, 7 Dec 2016 21:51:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933064AbcLGVsx (ORCPT ); Wed, 7 Dec 2016 16:48:53 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:37732 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932423AbcLGVst (ORCPT ); Wed, 7 Dec 2016 16:48:49 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 1635B61673; Wed, 7 Dec 2016 21:48:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1481147329; bh=Jcr+qEQ6FARn4RZV/5mYR1Oa+VhT8egtK6ioEVfT8fM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kwMSKYiv1fo6V/tOa+ojFaGng38ByLGdk2JIGgDpDKYkTbnnjYpoPpD5tiARqP1Oe VJUvWPxy9DpTX4L3TwSHCdtfM0Z0tULHwYyIpxBe8ZJ5Hna3TRDxrY+XzFI8vTcDkq lmMlGgboL7hNVqrdBJVsAQm1Fc1KsoOlrK8E/mQU= Received: from tbaicar-lnx.qualcomm.com (unknown [129.46.14.132]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: tbaicar@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id EDB8C61673; Wed, 7 Dec 2016 21:48:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1481147327; bh=Jcr+qEQ6FARn4RZV/5mYR1Oa+VhT8egtK6ioEVfT8fM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=P2yCm/ONghDbknna3W/AJcr6pdnD2nMQGvy2PU1IdiQxIWaCSsOEueiGWvq65XxUf HkYe/mgC2Xb4173/1fT34z/NvoWa1XT5hLw6OBrN10D9XEzXcdc8JGsAKtbNQEo4yu lUSKaaROduOg7EpHNQ0dMCG/bQPtTWMeOggi6PlY= DMARC-Filter: OpenDMARC Filter v1.3.1 smtp.codeaurora.org EDB8C61673 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=pass smtp.mailfrom=tbaicar@codeaurora.org From: Tyler Baicar To: christoffer.dall@linaro.org, marc.zyngier@arm.com, pbonzini@redhat.com, rkrcmar@redhat.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, rjw@rjwysocki.net, lenb@kernel.org, matt@codeblueprint.co.uk, robert.moore@intel.com, lv.zheng@intel.com, nkaje@codeaurora.org, zjzhang@codeaurora.org, mark.rutland@arm.com, james.morse@arm.com, akpm@linux-foundation.org, eun.taik.lee@samsung.com, sandeepa.s.prabhu@gmail.com, labbott@redhat.com, shijie.huang@arm.com, rruigrok@codeaurora.org, paul.gortmaker@windriver.com, tn@semihalf.com, fu.wei@linaro.org, rostedt@goodmis.org, bristot@redhat.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-efi@vger.kernel.org, devel@acpica.org, Suzuki.Poulose@arm.com, punit.agrawal@arm.com, astone@redhat.com, harba@codeaurora.org, hanjun.guo@linaro.org, john.garry@huawei.com, shiju.jose@huawei.com Cc: Tyler Baicar Subject: [PATCH V6 01/10] acpi: apei: read ack upon ghes record consumption Date: Wed, 7 Dec 2016 14:48:14 -0700 Message-Id: <1481147303-7979-2-git-send-email-tbaicar@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1481147303-7979-1-git-send-email-tbaicar@codeaurora.org> References: <1481147303-7979-1-git-send-email-tbaicar@codeaurora.org> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP A RAS (Reliability, Availability, Serviceability) controller may be a separate processor running in parallel with OS execution, and may generate error records for consumption by the OS. If the RAS controller produces multiple error records, then they may be overwritten before the OS has consumed them. The Generic Hardware Error Source (GHES) v2 structure introduces the capability for the OS to acknowledge the consumption of the error record generated by the RAS controller. A RAS controller supporting GHESv2 shall wait for the acknowledgment before writing a new error record, thus eliminating the race condition. Add support for parsing of GHESv2 sub-tables as well. Signed-off-by: Tyler Baicar Signed-off-by: Jonathan (Zhixiong) Zhang Signed-off-by: Richard Ruigrok Signed-off-by: Naveen Kaje Reviewed-by: James Morse --- drivers/acpi/apei/ghes.c | 49 +++++++++++++++++++++++++++++++++++++++++++++--- drivers/acpi/apei/hest.c | 7 +++++-- include/acpi/ghes.h | 5 ++++- 3 files changed, 55 insertions(+), 6 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 60746ef..b23160d 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -45,6 +45,7 @@ #include #include +#include #include #include #include @@ -79,6 +80,10 @@ ((struct acpi_hest_generic_status *) \ ((struct ghes_estatus_node *)(estatus_node) + 1)) +#define IS_HEST_TYPE_GENERIC_V2(ghes) \ + ((struct acpi_hest_header *)ghes->generic)->type == \ + ACPI_HEST_TYPE_GENERIC_ERROR_V2 + /* * This driver isn't really modular, however for the time being, * continuing to use module_param is the easiest way to remain @@ -248,10 +253,18 @@ static struct ghes *ghes_new(struct acpi_hest_generic *generic) ghes = kzalloc(sizeof(*ghes), GFP_KERNEL); if (!ghes) return ERR_PTR(-ENOMEM); + ghes->generic = generic; + if (IS_HEST_TYPE_GENERIC_V2(ghes)) { + rc = apei_map_generic_address( + &ghes->generic_v2->read_ack_register); + if (rc) + goto err_free; + } + rc = apei_map_generic_address(&generic->error_status_address); if (rc) - goto err_free; + goto err_unmap_read_ack_addr; error_block_length = generic->error_block_length; if (error_block_length > GHES_ESTATUS_MAX_SIZE) { pr_warning(FW_WARN GHES_PFX @@ -263,13 +276,17 @@ static struct ghes *ghes_new(struct acpi_hest_generic *generic) ghes->estatus = kmalloc(error_block_length, GFP_KERNEL); if (!ghes->estatus) { rc = -ENOMEM; - goto err_unmap; + goto err_unmap_status_addr; } return ghes; -err_unmap: +err_unmap_status_addr: apei_unmap_generic_address(&generic->error_status_address); +err_unmap_read_ack_addr: + if (IS_HEST_TYPE_GENERIC_V2(ghes)) + apei_unmap_generic_address( + &ghes->generic_v2->read_ack_register); err_free: kfree(ghes); return ERR_PTR(rc); @@ -279,6 +296,9 @@ static void ghes_fini(struct ghes *ghes) { kfree(ghes->estatus); apei_unmap_generic_address(&ghes->generic->error_status_address); + if (IS_HEST_TYPE_GENERIC_V2(ghes)) + apei_unmap_generic_address( + &ghes->generic_v2->read_ack_register); } static inline int ghes_severity(int severity) @@ -648,6 +668,23 @@ static void ghes_estatus_cache_add( rcu_read_unlock(); } +static int ghes_ack_error(struct acpi_hest_generic_v2 *generic_v2) +{ + int rc; + u64 val = 0; + + rc = apei_read(&val, &generic_v2->read_ack_register); + if (rc) + return rc; + val &= generic_v2->read_ack_preserve << + generic_v2->read_ack_register.bit_offset; + val |= generic_v2->read_ack_write << + generic_v2->read_ack_register.bit_offset; + rc = apei_write(val, &generic_v2->read_ack_register); + + return rc; +} + static int ghes_proc(struct ghes *ghes) { int rc; @@ -660,6 +697,12 @@ static int ghes_proc(struct ghes *ghes) ghes_estatus_cache_add(ghes->generic, ghes->estatus); } ghes_do_proc(ghes, ghes->estatus); + + if (IS_HEST_TYPE_GENERIC_V2(ghes)) { + rc = ghes_ack_error(ghes->generic_v2); + if (rc) + return rc; + } out: ghes_clear_estatus(ghes); return 0; diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c index 792a0d9..ef725a9 100644 --- a/drivers/acpi/apei/hest.c +++ b/drivers/acpi/apei/hest.c @@ -52,6 +52,7 @@ static const int hest_esrc_len_tab[ACPI_HEST_TYPE_RESERVED] = { [ACPI_HEST_TYPE_AER_ENDPOINT] = sizeof(struct acpi_hest_aer), [ACPI_HEST_TYPE_AER_BRIDGE] = sizeof(struct acpi_hest_aer_bridge), [ACPI_HEST_TYPE_GENERIC_ERROR] = sizeof(struct acpi_hest_generic), + [ACPI_HEST_TYPE_GENERIC_ERROR_V2] = sizeof(struct acpi_hest_generic_v2), }; static int hest_esrc_len(struct acpi_hest_header *hest_hdr) @@ -146,7 +147,8 @@ static int __init hest_parse_ghes_count(struct acpi_hest_header *hest_hdr, void { int *count = data; - if (hest_hdr->type == ACPI_HEST_TYPE_GENERIC_ERROR) + if (hest_hdr->type == ACPI_HEST_TYPE_GENERIC_ERROR || + hest_hdr->type == ACPI_HEST_TYPE_GENERIC_ERROR_V2) (*count)++; return 0; } @@ -157,7 +159,8 @@ static int __init hest_parse_ghes(struct acpi_hest_header *hest_hdr, void *data) struct ghes_arr *ghes_arr = data; int rc, i; - if (hest_hdr->type != ACPI_HEST_TYPE_GENERIC_ERROR) + if (hest_hdr->type != ACPI_HEST_TYPE_GENERIC_ERROR && + hest_hdr->type != ACPI_HEST_TYPE_GENERIC_ERROR_V2) return 0; if (!((struct acpi_hest_generic *)hest_hdr)->enabled) diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h index 720446c..68f088a 100644 --- a/include/acpi/ghes.h +++ b/include/acpi/ghes.h @@ -13,7 +13,10 @@ #define GHES_EXITING 0x0002 struct ghes { - struct acpi_hest_generic *generic; + union { + struct acpi_hest_generic *generic; + struct acpi_hest_generic_v2 *generic_v2; + }; struct acpi_hest_generic_status *estatus; u64 buffer_paddr; unsigned long flags;