From patchwork Mon Jul 8 11:18:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 811204 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 2D24D39FD7; Mon, 8 Jul 2024 11:19:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720437554; cv=none; b=pRWq2imM3r/Ms0ynZJSAoctMt84TlOGt5jz8pTvQP8wowAtfH1ZlXOKnTRAaHKAMn7hRqgS8Gf7ZO7aPvnNkfTthfIldn0/+YnA+LIBVipHsV377qoICHHIBoyvi2Wu7PnBNAbK7mSkcZAl7G4I1k0Qt2rQvmfxfii6iq4NQ428= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720437554; c=relaxed/simple; bh=jPOSGw8h3LTxme7xAjF29NTRuS0fIgaE9Bx1xOw0o50=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fL6U7JJLX+FiSbuJKZJKhw74+F3gTHndVN0RZmJt67Hs84JoGT+QijNWpXo+D6DUTo9SUwpbJFuMAPju0H/Ia68ne8wPZztDgwo1UBZx78ouPsY1oP7ymOpGB0VgMqbsYPnrFeO/8G2NhGjgFntrguXc1g42esinAzw+/AD8eFw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=maSieSA3; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="maSieSA3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0198FC4AF0A; Mon, 8 Jul 2024 11:19:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1720437554; bh=jPOSGw8h3LTxme7xAjF29NTRuS0fIgaE9Bx1xOw0o50=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=maSieSA3JmSQKEQVd7NmXYm1z4re/L6AIb6EHSiN4eX+qAitt8hy9+nXm8Bcf7j14 CakCb7I8I6AAFmIYk/Ycj26X/VRL3fV+qiiTf8ubDflqrnqCeH6U3ZZ1UodHie5msR IexZlvcwsr8bOdGQPDNqNiQP2YQaSxLMYNqKWeVH8lBnn+kHkZFEQ/nPu2r+1QZvMC merwvShAHvMZhGqjnBREw2V+sTg6A0XClU47gJpfb4VCtMcfLu3UlAGWABQuOkT1Xe 4/C/lIgHPmLPz4FXF257dTTHueBafdXcBAqSrXaM9L4Ju6tcrKqnjqpC2rtqj/zUdM AiidmZoznoy7g== Received: from mchehab by mail.kernel.org with local (Exim 4.97.1) (envelope-from ) id 1sQmOl-00000001SQl-2bki; Mon, 08 Jul 2024 13:19:11 +0200 From: Mauro Carvalho Chehab To: Borislav Petkov , Tony Luck Cc: Mauro Carvalho Chehab , "Ard Biesheuvel" , "James Morse" , "Jonathan Cameron" , "Len Brown" , "Rafael J. Wysocki" , "Shiju Jose" , Alison Schofield , Ira Weiny , linux-acpi@vger.kernel.org, linux-edac@vger.kernel.org, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/6] efi/cper: Add a new helper function to print bitmasks Date: Mon, 8 Jul 2024 13:18:13 +0200 Message-ID: X-Mailer: git-send-email 2.45.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sender: Mauro Carvalho Chehab Sometimes it is desired to produce a single log line for errors. Add a new helper function for such purpose. Signed-off-by: Mauro Carvalho Chehab --- drivers/firmware/efi/cper.c | 43 +++++++++++++++++++++++++++++++++++++ include/linux/cper.h | 2 ++ 2 files changed, 45 insertions(+) diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c index 7d2cdd9e2227..f8c8a15cd527 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -106,6 +106,49 @@ void cper_print_bits(const char *pfx, unsigned int bits, printk("%s\n", buf); } +/* + * cper_bits_to_str - return a string for set bits + * @buf: buffer to store the output string + * @buf_size: size of the output string buffer + * @bits: bit mask + * @strs: string array, indexed by bit position + * @strs_size: size of the string array: @strs + * @mask: a continuous bitmask used to detect the first valid bit of the + * bitmap. + * + * Add to @buf the bitmask in hexadecimal. Then, for each set bit in @bits + * mask, add the corresponding string describing the bit in @strs to @buf. + */ +char *cper_bits_to_str(char *buf, int buf_size, unsigned long bits, + const char * const strs[], unsigned int strs_size) +{ + int len = buf_size; + char *str = buf; + int i, size; + + *buf = '\0'; + + for_each_set_bit(i, &bits, strs_size) { + if (!(bits & (1U << (i)))) + continue; + + if (*buf && len > 0) { + *str = '|'; + len--; + str++; + } + + size = strscpy(str, strs[i], len); + if (size < 0) + break; + + len -= size; + str += size; + } + return buf; +} +EXPORT_SYMBOL_GPL(cper_bits_to_str); + static const char * const proc_type_strs[] = { "IA32/X64", "IA64", diff --git a/include/linux/cper.h b/include/linux/cper.h index 265b0f8fc0b3..c2f14b916bfb 100644 --- a/include/linux/cper.h +++ b/include/linux/cper.h @@ -584,6 +584,8 @@ const char *cper_mem_err_type_str(unsigned int); const char *cper_mem_err_status_str(u64 status); void cper_print_bits(const char *prefix, unsigned int bits, const char * const strs[], unsigned int strs_size); +char *cper_bits_to_str(char *buf, int buf_size, unsigned long bits, + const char * const strs[], unsigned int strs_size); void cper_mem_err_pack(const struct cper_sec_mem_err *, struct cper_mem_err_compact *); const char *cper_mem_err_unpack(struct trace_seq *,