Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757390Ab1F0I2b (ORCPT ); Mon, 27 Jun 2011 04:28:31 -0400 Received: from mga14.intel.com ([143.182.124.37]:21556 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757319Ab1F0I0K (ORCPT ); Mon, 27 Jun 2011 04:26:10 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.65,431,1304319600"; d="scan'208";a="19009141" From: Huang Ying To: Len Brown Cc: linux-kernel@vger.kernel.org, Andi Kleen , Tony Luck , ying.huang@intel.com, linux-acpi@vger.kernel.org, mjg59@srcf.ucam.org Subject: [PATCH -v2 4/4] ACPI, APEI, Add WHEA _OSC support Date: Mon, 27 Jun 2011 16:26:00 +0800 Message-Id: <1309163160-3201-5-git-send-email-ying.huang@intel.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1309163160-3201-1-git-send-email-ying.huang@intel.com> References: <1309163160-3201-1-git-send-email-ying.huang@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2723 Lines: 78 APEI firmware first mode must be turned on explicitly on some machines, otherwise there may be no GHES hardware error record for hardware error notification. APEI bit in generic _OSC call can be used to do that, but on some machine, a special WHEA _OSC call must be used. This patch adds the support to that WHEA _OSC call. Signed-off-by: Huang Ying --- drivers/acpi/apei/apei-base.c | 26 ++++++++++++++++++++++++++ drivers/acpi/apei/apei-internal.h | 2 ++ drivers/acpi/apei/ghes.c | 10 ++++++++++ 3 files changed, 38 insertions(+) --- a/drivers/acpi/apei/apei-base.c +++ b/drivers/acpi/apei/apei-base.c @@ -604,3 +604,29 @@ struct dentry *apei_get_debugfs_dir(void return dapei; } EXPORT_SYMBOL_GPL(apei_get_debugfs_dir); + +int apei_osc_setup(void) +{ + static u8 whea_uuid_str[] = "ed855e0c-6c90-47bf-a62a-26de0fc5ad5c"; + acpi_handle handle; + u32 capbuf[3]; + struct acpi_osc_context context = { + .uuid_str = whea_uuid_str, + .rev = 1, + .cap.length = sizeof(capbuf), + .cap.pointer = capbuf, + }; + + capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; + capbuf[OSC_SUPPORT_TYPE] = 0; + capbuf[OSC_CONTROL_TYPE] = 0; + + if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)) + || ACPI_FAILURE(acpi_run_osc(handle, &context))) + return -EIO; + else { + kfree(context.ret.pointer); + return 0; + } +} +EXPORT_SYMBOL_GPL(apei_osc_setup); --- a/drivers/acpi/apei/apei-internal.h +++ b/drivers/acpi/apei/apei-internal.h @@ -124,4 +124,6 @@ void apei_estatus_print(const char *pfx, const struct acpi_hest_generic_status *estatus); int apei_estatus_check_header(const struct acpi_hest_generic_status *estatus); int apei_estatus_check(const struct acpi_hest_generic_status *estatus); + +int apei_osc_setup(void); #endif --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -681,6 +681,16 @@ static int __init ghes_init(void) if (rc) goto err_ioremap_exit; + rc = apei_osc_setup(); + if (rc == 0 && osc_sb_apei_support_acked) + pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit and WHEA _OSC.\n"); + else if (rc == 0 && !osc_sb_apei_support_acked) + pr_info(GHES_PFX "APEI firmware first mode is enabled by WHEA _OSC.\n"); + else if (rc && osc_sb_apei_support_acked) + pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit.\n"); + else + pr_info(GHES_PFX "Failed to enable APEI firmware first mode.\n"); + return 0; err_ioremap_exit: ghes_ioremap_exit(); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/