From patchwork Thu Jul 11 00:02:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Kuppuswamy Sathyanarayanan X-Patchwork-Id: 13729895 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A053510E5; Thu, 11 Jul 2024 00:02:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.15 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720656171; cv=none; b=kDiJVj7wk2LTruSGCTQ1W4y9vja1B+BCQcckLoFSyawtaslA4etGO1iBX3yrGbDnmelU7yJLTLP8nd6OD2rSzC9M5FDSGSllPtkcdTAtxQPqW4K1a5XemksUWKQQBFiDhedvyT6BK4w49Zj8SbUlQHYXWxJMR0AlUWJeLNTk8kQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720656171; c=relaxed/simple; bh=CNvKn99alv1qrOJStM18Pg4taxwCXDbEobey+C9j0rQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=D8yxn1t1P4ldIAUy/U9A/i7FU+il7t6mFWUQMPxX8rxMmYqBnrqVboyGKraTYDvQiYSersuKlKzOOI14+sEhPmh8vDVtL4ly1hPuQpS6im8D8qaPymrZLArNcjEM36rwLgpkK4GPelVPaOlVPuUyF8aKao1i5YYkLJdsf/tF1eg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=oJt7Z7cy; arc=none smtp.client-ip=192.198.163.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="oJt7Z7cy" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1720656169; x=1752192169; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=CNvKn99alv1qrOJStM18Pg4taxwCXDbEobey+C9j0rQ=; b=oJt7Z7cyEOu23OLO2Kz5kL1p4zjZIlk650ZyOR4G8KynS/16vi44uvFW k2utrfAf1W73oGXjUWBycVSxAOKPyO2BPNsH0RtUzI8/JrUKEqg6kTe4p NSQOGFEwwbWR9GMVSZXRDoDe0I8B9+y6vVkSqLpdTe1ePFX/LL4a7JtLq 0Q7cbTXVEUmFjRn+7fl+zCRSBS5z7K4AnARzO41O0rXO+1YFV2uJI5nw5 /AM1pZgBe7K/5iQUEh+ISYNJ7UUxUGTHEdGFxdTmf8fIG+gF8NsX01I9l mK1YNUEV9fQvI1ZuOD6KXXVcxUa9s+4d38cAiNVjHCVl6Xr+Y7HHCTz8a w==; X-CSE-ConnectionGUID: +hjkUOC6SauXTRhFcAjalg== X-CSE-MsgGUID: MXWELmmgRZWMxkZhpYm6sQ== X-IronPort-AV: E=McAfee;i="6700,10204,11129"; a="18153707" X-IronPort-AV: E=Sophos;i="6.09,198,1716274800"; d="scan'208";a="18153707" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jul 2024 17:02:49 -0700 X-CSE-ConnectionGUID: gfmctBzeR0KcBGpk2dPZGw== X-CSE-MsgGUID: 1XV+IBIfSAi48Ds6t2uITA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.09,198,1716274800"; d="scan'208";a="48349902" Received: from cmdeoliv-mobl.amr.corp.intel.com (HELO localhost.localdomain) ([10.125.109.234]) by fmviesa008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jul 2024 17:02:48 -0700 From: Kuppuswamy Sathyanarayanan To: Jithu Joseph , Hans de Goede , Ilpo Jarvinen Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, Steven Rostedt , Masami Hiramatsu , Ashok Raj , Tony Luck , linux-trace-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, Shankar Ravi V Subject: [PATCH v2 1/4] platform/x86/intel/ifs: Refactor MSR usage in IFS test code Date: Wed, 10 Jul 2024 17:02:30 -0700 Message-Id: <20240711000233.684642-2-sathyanarayanan.kuppuswamy@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240711000233.684642-1-sathyanarayanan.kuppuswamy@linux.intel.com> References: <20240711000233.684642-1-sathyanarayanan.kuppuswamy@linux.intel.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 IFS tests such as Scan at Field (SAF) or Structural Based Functional Test at Field (SBAF), require the user to load a test image. The image loading process is similar across these tests, with the only difference being MSR addresses used. To reuse the code between these tests, remove the hard coding of MSR addresses and allow the driver to pass the MSR addresses per IFS test (via driver device data). Add a new structure named "struct ifs_test_msrs" to specify the test-specific MSR addresses. Each IFS test will provide this structure, enabling them to reuse the common code. This is a preliminary patch in preparation for the addition of SBAF support. Reviewed-by: Ashok Raj Reviewed-by: Tony Luck Signed-off-by: Kuppuswamy Sathyanarayanan Reviewed-by: Ilpo Järvinen --- drivers/platform/x86/intel/ifs/ifs.h | 25 +++++++++++++++++++++++++ drivers/platform/x86/intel/ifs/core.c | 9 +++++++++ drivers/platform/x86/intel/ifs/load.c | 24 ++++++++++++++---------- 3 files changed, 48 insertions(+), 10 deletions(-) diff --git a/drivers/platform/x86/intel/ifs/ifs.h b/drivers/platform/x86/intel/ifs/ifs.h index 56b9f3e3cf76..738cbc7a5d00 100644 --- a/drivers/platform/x86/intel/ifs/ifs.h +++ b/drivers/platform/x86/intel/ifs/ifs.h @@ -266,6 +266,22 @@ struct ifs_test_caps { int test_num; }; +/** + * struct ifs_test_msrs - MSRs used in IFS tests + * @copy_hashes: Copy test hash data + * @copy_hashes_status: Status of copied test hash data + * @copy_chunks: Copy chunks of the test data + * @copy_chunks_status: Status of the copied test data chunks + * @test_ctrl: Control the test attributes + */ +struct ifs_test_msrs { + u32 copy_hashes; + u32 copy_hashes_status; + u32 copy_chunks; + u32 copy_chunks_status; + u32 test_ctrl; +}; + /** * struct ifs_data - attributes related to intel IFS driver * @loaded_version: stores the currently loaded ifs image version. @@ -299,6 +315,7 @@ struct ifs_work { struct ifs_device { const struct ifs_test_caps *test_caps; + const struct ifs_test_msrs *test_msrs; struct ifs_data rw_data; struct miscdevice misc; }; @@ -319,6 +336,14 @@ static inline const struct ifs_test_caps *ifs_get_test_caps(struct device *dev) return d->test_caps; } +static inline const struct ifs_test_msrs *ifs_get_test_msrs(struct device *dev) +{ + struct miscdevice *m = dev_get_drvdata(dev); + struct ifs_device *d = container_of(m, struct ifs_device, misc); + + return d->test_msrs; +} + extern bool *ifs_pkg_auth; int ifs_load_firmware(struct device *dev); int do_core_test(int cpu, struct device *dev); diff --git a/drivers/platform/x86/intel/ifs/core.c b/drivers/platform/x86/intel/ifs/core.c index 7b11198d85a1..1a7ca74abb61 100644 --- a/drivers/platform/x86/intel/ifs/core.c +++ b/drivers/platform/x86/intel/ifs/core.c @@ -40,9 +40,18 @@ static const struct ifs_test_caps array_test = { .test_num = IFS_TYPE_ARRAY_BIST, }; +static const struct ifs_test_msrs scan_msrs = { + .copy_hashes = MSR_COPY_SCAN_HASHES, + .copy_hashes_status = MSR_SCAN_HASHES_STATUS, + .copy_chunks = MSR_AUTHENTICATE_AND_COPY_CHUNK, + .copy_chunks_status = MSR_CHUNKS_AUTHENTICATION_STATUS, + .test_ctrl = MSR_SAF_CTRL, +}; + static struct ifs_device ifs_devices[] = { [IFS_TYPE_SAF] = { .test_caps = &scan_test, + .test_msrs = &scan_msrs, .misc = { .name = "intel_ifs_0", .minor = MISC_DYNAMIC_MINOR, diff --git a/drivers/platform/x86/intel/ifs/load.c b/drivers/platform/x86/intel/ifs/load.c index 39f19cb51749..ad0c107f0922 100644 --- a/drivers/platform/x86/intel/ifs/load.c +++ b/drivers/platform/x86/intel/ifs/load.c @@ -118,15 +118,17 @@ static void copy_hashes_authenticate_chunks(struct work_struct *work) union ifs_scan_hashes_status hashes_status; union ifs_chunks_auth_status chunk_status; struct device *dev = local_work->dev; + const struct ifs_test_msrs *msrs; int i, num_chunks, chunk_size; struct ifs_data *ifsd; u64 linear_addr, base; u32 err_code; ifsd = ifs_get_data(dev); + msrs = ifs_get_test_msrs(dev); /* run scan hash copy */ - wrmsrl(MSR_COPY_SCAN_HASHES, ifs_hash_ptr); - rdmsrl(MSR_SCAN_HASHES_STATUS, hashes_status.data); + wrmsrl(msrs->copy_hashes, ifs_hash_ptr); + rdmsrl(msrs->copy_hashes_status, hashes_status.data); /* enumerate the scan image information */ num_chunks = hashes_status.num_chunks; @@ -147,8 +149,8 @@ static void copy_hashes_authenticate_chunks(struct work_struct *work) linear_addr = base + i * chunk_size; linear_addr |= i; - wrmsrl(MSR_AUTHENTICATE_AND_COPY_CHUNK, linear_addr); - rdmsrl(MSR_CHUNKS_AUTHENTICATION_STATUS, chunk_status.data); + wrmsrl(msrs->copy_chunks, linear_addr); + rdmsrl(msrs->copy_chunks_status, chunk_status.data); ifsd->valid_chunks = chunk_status.valid_chunks; err_code = chunk_status.error_code; @@ -180,6 +182,7 @@ static int copy_hashes_authenticate_chunks_gen2(struct device *dev) union ifs_scan_hashes_status_gen2 hashes_status; union ifs_chunks_auth_status_gen2 chunk_status; u32 err_code, valid_chunks, total_chunks; + const struct ifs_test_msrs *msrs; int i, num_chunks, chunk_size; union meta_data *ifs_meta; int starting_chunk_nr; @@ -189,10 +192,11 @@ static int copy_hashes_authenticate_chunks_gen2(struct device *dev) int retry_count; ifsd = ifs_get_data(dev); + msrs = ifs_get_test_msrs(dev); if (need_copy_scan_hashes(ifsd)) { - wrmsrl(MSR_COPY_SCAN_HASHES, ifs_hash_ptr); - rdmsrl(MSR_SCAN_HASHES_STATUS, hashes_status.data); + wrmsrl(msrs->copy_hashes, ifs_hash_ptr); + rdmsrl(msrs->copy_hashes_status, hashes_status.data); /* enumerate the scan image information */ chunk_size = hashes_status.chunk_size * SZ_1K; @@ -212,8 +216,8 @@ static int copy_hashes_authenticate_chunks_gen2(struct device *dev) } if (ifsd->generation >= IFS_GEN_STRIDE_AWARE) { - wrmsrl(MSR_SAF_CTRL, INVALIDATE_STRIDE); - rdmsrl(MSR_CHUNKS_AUTHENTICATION_STATUS, chunk_status.data); + wrmsrl(msrs->test_ctrl, INVALIDATE_STRIDE); + rdmsrl(msrs->copy_chunks_status, chunk_status.data); if (chunk_status.valid_chunks != 0) { dev_err(dev, "Couldn't invalidate installed stride - %d\n", chunk_status.valid_chunks); @@ -234,9 +238,9 @@ static int copy_hashes_authenticate_chunks_gen2(struct device *dev) chunk_table[1] = linear_addr; do { local_irq_disable(); - wrmsrl(MSR_AUTHENTICATE_AND_COPY_CHUNK, (u64)chunk_table); + wrmsrl(msrs->copy_chunks, (u64)chunk_table); local_irq_enable(); - rdmsrl(MSR_CHUNKS_AUTHENTICATION_STATUS, chunk_status.data); + rdmsrl(msrs->copy_chunks_status, chunk_status.data); err_code = chunk_status.error_code; } while (err_code == AUTH_INTERRUPTED_ERROR && --retry_count);