linux-hardening - [PATCH v4 21/21] firmware: qcom_scm: Add multiple download mode support

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Date:   Wed, 28 Jun 2023 18:04:48 +0530
From:   Mukesh Ojha <quic_mojha@...cinc.com>
To:     <corbet@....net>, <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <keescook@...omium.org>, <tony.luck@...el.com>,
        <gpiccoli@...lia.com>, <mathieu.poirier@...aro.org>,
        <catalin.marinas@....com>, <will@...nel.org>,
        <linus.walleij@...aro.org>, <andy.shevchenko@...il.com>
CC:     <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-hardening@...r.kernel.org>,
        <linux-remoteproc@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-gpio@...r.kernel.org>,
        "Mukesh Ojha" <quic_mojha@...cinc.com>
Subject: [PATCH v4 21/21] firmware: qcom_scm: Add multiple download mode support

Currently, scm driver only supports full dump when download
mode is selected. Add support to enable minidump as well as
enable it along with fulldump.

Signed-off-by: Mukesh Ojha <quic_mojha@...cinc.com>
---
 drivers/firmware/qcom_scm.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 946cb0f76a17..52e3b613a1af 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -31,6 +31,8 @@ static u32 download_mode;
 #define SCM_HAS_BUS_CLK		BIT(2)
 
 #define QCOM_DOWNLOAD_FULLDUMP		 0x1
+#define QCOM_DOWNLOAD_MINIDUMP		 0x2
+#define QCOM_DOWNLOAD_BOTHDUMP		 (QCOM_DOWNLOAD_FULLDUMP | QCOM_DOWNLOAD_MINIDUMP)
 #define QCOM_DOWNLOAD_NODUMP		 0x0
 #define QCOM_DOWNLOAD_MODE_SHIFT	   4
 #define QCOM_DOWNLOAD_MODE_MASK		0x30
@@ -85,6 +87,8 @@ static const char * const qcom_scm_convention_names[] = {
 static const char * const download_mode_name[] = {
 	[QCOM_DOWNLOAD_NODUMP]	 = "off",
 	[QCOM_DOWNLOAD_FULLDUMP] = "full",
+	[QCOM_DOWNLOAD_MINIDUMP] = "mini",
+	[QCOM_DOWNLOAD_BOTHDUMP] = "full,mini",
 };
 
 static struct qcom_scm *__scm;
@@ -1465,7 +1469,7 @@ static const struct kernel_param_ops download_mode_param_ops = {
 
 module_param_cb(download_mode, &download_mode_param_ops, NULL, 0644);
 MODULE_PARM_DESC(download_mode,
-		"download mode: off/full are acceptable values");
+		"download mode: off/full/mini/full,mini are acceptable values");
 
 static int qcom_scm_probe(struct platform_device *pdev)
 {
-- 
2.7.4