From patchwork Mon Jun 24 09:19:19 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: 13709225 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 5AC9412FF8C; Mon, 24 Jun 2024 09:19:50 +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=1719220790; cv=none; b=kRJ4qnp4/4FOzYfMu1ufGjbpMIHJuNODkKwpoTXttPKkes4J4TnR1PfacDEiE9gcJEp5HTGzAKxHrLjd8PDAtkffcD3RocgyW4pdVQvTxyIwu4B8b4lYdFgoN5YQhx5+8HMiSOgnKO9YUHWCUSapGuH29ln90H+CmnK+FPxLn3g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719220790; c=relaxed/simple; bh=MiJu506E02sUqMejKu5a4CpTEW7a3bv6SgfhjAqtNZM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pnS/Xj03BY+9+n3wFp2MGxfpWdNnqBSzFz/hUEj1FqMjRTZbU7inGD5fQZ2EipGCxFJ7Q43bKhJN8IN0fwuHeY0FLCGqVUeAP6fLYFMdP24XTEeKWwVcwpVtVi2UWQVs8jvaN/MrmAYNVp9b5M979nLZKXe+Y8TsTwu/geqpMFo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tGYP9MFX; 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="tGYP9MFX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0936CC32782; Mon, 24 Jun 2024 09:19:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719220790; bh=MiJu506E02sUqMejKu5a4CpTEW7a3bv6SgfhjAqtNZM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tGYP9MFXOpjlu+0DM1dR1AdDd1EIvzeJ4btWbao7hqc2LxltXn0sLcJYhNUEr6Mwq 548Ptdnx09TP1zDcwf8ot2vLOXmzc+XsfW87qDZJ9XyTfh2Y+CqgWAReyjT7jtnD+j HTUEwLg8PQKYOGXUyn3xcDmJc/VSJ4wxSuhjCf35pRr4TP/yGMaphDlcvhlV9FHxl6 Z7H+J5xaMFEcDtN9+hk+Z7TEU7KdBdGcIASdwOIoYX6vfg7D9s98IIYgDG0FmlX1WV EAdlaemWJCagRjpA3E0UTHCzHWTqWVuk2PozvT1zROqQHnZmdwdrQfKCgD+1NOvOzd CFz0N1MZ5YWUw== Received: from mchehab by mail.kernel.org with local (Exim 4.97.1) (envelope-from ) id 1sLfrX-000000085bi-1s15; Mon, 24 Jun 2024 11:19:47 +0200 From: Mauro Carvalho Chehab To: Cc: Mauro Carvalho Chehab , "Borislav Petkov" , "James Morse" , "Jonathan Cameron" , "Shiju Jose" , "Tony Luck" , Alison Schofield , Ard Biesheuvel , Dave Jiang , Ira Weiny , linux-edac@vger.kernel.org, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 2/4] efi/cper: Add a new helper function to print bitmasks Date: Mon, 24 Jun 2024 11:19:19 +0200 Message-ID: X-Mailer: git-send-email 2.45.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-edac@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 | 41 +++++++++++++++++++++++++++++++++++++ include/linux/cper.h | 2 ++ 2 files changed, 43 insertions(+) diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c index 7d2cdd9e2227..4cf56657afde 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -106,6 +106,47 @@ 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; + + 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 *,