From 5f5251591ad0e9ae2e446eca48e27ac251c0d14b Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Wed, 12 Sep 2018 20:32:05 +0200
Subject: [PATCH] efi/x86: Call efi_parse_options() from efi_main()
Before this commit we were only calling efi_parse_options() from
make_boot_params(), but make_boot_params() only gets called if the
kernel gets booted directly as an EFI executable. So when booted through
e.g. grub we ended up not parsing the commandline in the boot code.
This makes the drivers/firmware/efi/libstub code ignore the "quiet"
commandline argument resulting in the following message being printed:
"EFI stub: UEFI Secure Boot is enabled."
Despite the quiet request. This commits adds an extra call to
efi_parse_options() to efi_main() to make sure that the options are
always processed. This fixes quiet not working.
This also fixes the libstub code ignoring nokaslr and efi=nochunk.
Reported-by: Peter Robinson <pbrobinson@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
arch/x86/boot/compressed/eboot.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index e98522e..8aa6f96 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -918,6 +918,7 @@ struct boot_params *efi_main(struct efi_config *c,
struct desc_struct *desc;
void *handle;
efi_system_table_t *_table;
+ unsigned long cmdline_paddr;
bool is64;
efi_early = c;
@@ -937,6 +938,15 @@ struct boot_params *efi_main(struct efi_config *c,
else
setup_boot_services32(efi_early);
+ /*
+ * make_boot_params() may have been called before efi_main(), in which
+ * case this is the second time we parse the cmdline. This is ok,
+ * parsing the cmdline multiple times does not have side-effects.
+ */
+ cmdline_paddr = ((u64)hdr->cmd_line_ptr |
+ ((u64)boot_params->ext_cmd_line_ptr << 32));
+ efi_parse_options((char *)cmdline_paddr);
+
/*
* If the boot loader gave us a value for secure_boot then we use that,
* otherwise we ask the BIOS.
--
2.19.0.rc1