From: Chester Lin <clin@suse.com>
To: ardb@kernel.org, catalin.marinas@arm.com, will@kernel.org,
zohar@linux.ibm.com, dmitry.kasatkin@gmail.com, corbet@lwn.net,
mark.rutland@arm.com, vincenzo.frascino@arm.com,
samitolvanen@google.com, masahiroy@kernel.org, mingo@kernel.org
Cc: linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-integrity@vger.kernel.org, linux-doc@vger.kernel.org,
jlee@suse.com, clin@suse.com
Subject: [PATCH 2/6] efi/arm: a helper to parse secure boot param in fdt params
Date: Fri, 4 Sep 2020 15:29:01 +0800 [thread overview]
Message-ID: <20200904072905.25332-3-clin@suse.com> (raw)
In-Reply-To: <20200904072905.25332-1-clin@suse.com>
Add a helper to query the UEFI secureboot param from the chosen node in
FDT.
Signed-off-by: Chester Lin <clin@suse.com>
---
drivers/firmware/efi/fdtparams.c | 23 +++++++++++++++++++++++
include/linux/efi.h | 1 +
2 files changed, 24 insertions(+)
diff --git a/drivers/firmware/efi/fdtparams.c b/drivers/firmware/efi/fdtparams.c
index bb042ab7c2be..d58ec4119bcf 100644
--- a/drivers/firmware/efi/fdtparams.c
+++ b/drivers/firmware/efi/fdtparams.c
@@ -124,3 +124,26 @@ u64 __init efi_get_fdt_params(struct efi_memory_map_data *mm)
pr_info("UEFI not found.\n");
return 0;
}
+
+bool __init efi_secureboot_enabled_in_fdt(void)
+{
+ const void *fdt = initial_boot_params;
+ int node;
+ u32 secboot;
+
+
+ node = fdt_path_offset(fdt, "/chosen");
+
+ if (node < 0) {
+ pr_err("chosen node not found.\n");
+ return false;
+ }
+
+ if (!efi_get_fdt_prop(fdt, node, "linux,uefi-secure-boot",
+ "SECURE BOOT", &secboot, sizeof(secboot))) {
+ if (secboot)
+ return true;
+ }
+
+ return false;
+}
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 73db1ae04cef..315126b2f5e9 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -663,6 +663,7 @@ extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);
extern void efi_initialize_iomem_resources(struct resource *code_resource,
struct resource *data_resource, struct resource *bss_resource);
extern u64 efi_get_fdt_params(struct efi_memory_map_data *data);
+extern bool __init efi_secureboot_enabled_in_fdt(void);
extern struct kobject *efi_kobj;
extern int efi_reboot_quirk_mode;
--
2.26.1
next prev parent reply other threads:[~2020-09-04 7:30 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-04 7:28 [PATCH 0/6] add ima_arch support for ARM64 Chester Lin
2020-09-04 7:29 ` [PATCH 1/6] efistub: pass uefi secureboot flag via fdt params Chester Lin
2020-09-11 15:01 ` Ard Biesheuvel
2020-09-14 8:05 ` Chester Lin
2020-10-05 2:20 ` Chester Lin
2020-10-12 8:20 ` Ard Biesheuvel
2020-09-04 7:29 ` Chester Lin [this message]
2020-09-04 7:29 ` [PATCH 3/6] efi: add secure boot flag Chester Lin
2020-09-04 7:29 ` [PATCH 4/6] efi/arm: check secure boot status in efi init Chester Lin
2020-09-04 7:29 ` [PATCH 5/6] arm64/ima: add ima arch support Chester Lin
2020-09-04 11:47 ` Mimi Zohar
2020-09-04 7:29 ` [PATCH 6/6] docs/arm: add the description of uefi-secure-boot param Chester Lin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200904072905.25332-3-clin@suse.com \
--to=clin@suse.com \
--cc=ardb@kernel.org \
--cc=catalin.marinas@arm.com \
--cc=corbet@lwn.net \
--cc=dmitry.kasatkin@gmail.com \
--cc=jlee@suse.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-efi@vger.kernel.org \
--cc=linux-integrity@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=masahiroy@kernel.org \
--cc=mingo@kernel.org \
--cc=samitolvanen@google.com \
--cc=vincenzo.frascino@arm.com \
--cc=will@kernel.org \
--cc=zohar@linux.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).