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From: "Lee, Chun-Yi" <joeyli.kernel@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: linux-efi@vger.kernel.org, x86@kernel.org,
        keyrings@vger.kernel.org, linux-integrity@vger.kernel.org,
        "Lee, Chun-Yi" <jlee@suse.com>, Kees Cook <keescook@chromium.org>,
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        Ryan Chen <yu.chen.surf@gmail.com>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        David Howells <dhowells@redhat.com>,
        Mimi Zohar <zohar@linux.vnet.ibm.com>
Subject: [PATCH 2/6] efi: the function transfers status to string
Date: Sun,  5 Aug 2018 11:21:15 +0800
Message-Id: <20180805032119.20485-3-jlee@suse.com>
In-Reply-To: <20180805032119.20485-1-jlee@suse.com>
References: <20180805032119.20485-1-jlee@suse.com>
Sender: linux-integrity-owner@vger.kernel.org
List-ID: <linux-integrity.vger.kernel.org>

This function can be used to transfer EFI status code to string
for printing out debug message.

Cc: Kees Cook <keescook@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Chen Yu <yu.c.chen@intel.com>
Cc: Oliver Neukum <oneukum@suse.com>
Cc: Ryan Chen <yu.chen.surf@gmail.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: "Lee, Chun-Yi" <jlee@suse.com>
---
 include/linux/efi.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/include/linux/efi.h b/include/linux/efi.h
index 56add823f190..744cf92fe18e 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -1651,4 +1651,30 @@ struct linux_efi_tpm_eventlog {
 
 extern int efi_tpm_eventlog_init(void);
 
+#define EFI_STATUS_STR(_status) \
+case EFI_##_status: \
+	return "EFI_" __stringify(_status);
+
+static inline char *
+efi_status_to_str(efi_status_t status)
+{
+	switch (status) {
+	EFI_STATUS_STR(SUCCESS)
+	EFI_STATUS_STR(LOAD_ERROR)
+	EFI_STATUS_STR(INVALID_PARAMETER)
+	EFI_STATUS_STR(UNSUPPORTED)
+	EFI_STATUS_STR(BAD_BUFFER_SIZE)
+	EFI_STATUS_STR(BUFFER_TOO_SMALL)
+	EFI_STATUS_STR(NOT_READY)
+	EFI_STATUS_STR(DEVICE_ERROR)
+	EFI_STATUS_STR(WRITE_PROTECTED)
+	EFI_STATUS_STR(OUT_OF_RESOURCES)
+	EFI_STATUS_STR(NOT_FOUND)
+	EFI_STATUS_STR(ABORTED)
+	EFI_STATUS_STR(SECURITY_VIOLATION)
+	}
+
+	return "";
+}
+
 #endif /* _LINUX_EFI_H */
-- 
2.13.6