59 lines
2.1 KiB
Diff
59 lines
2.1 KiB
Diff
From 69d303f3860b4127343613785ceb5d52fa715321 Mon Sep 17 00:00:00 2001
|
|
From: Leah Rowe <leah@libreboot.org>
|
|
Date: Sun, 16 May 2021 00:16:30 +0100
|
|
Subject: [PATCH 1/1] Add runtime option: etc/only-load-option-roms (load, but
|
|
don't run)
|
|
|
|
From anecdotal reports, sometimes it is useful; I've heard of instances where
|
|
certain Nvidia graphics cards can, if using the nouveau driver on a GNU+Linux
|
|
system, be used without running any option ROM, but where the option ROM has
|
|
certain data tables in it that the driver can use.
|
|
|
|
If set to 1, this will disable *all* option ROM loading, even SeaVGABIOS. It
|
|
also affects CSM. In practise, the only time someone would ever use this is if
|
|
they were using a graphics card in the above scenario. Such a use-case is
|
|
incredibly rare.
|
|
|
|
If set to 0, the normal behaviour can be observed (load, and execute). The
|
|
run time option etc/pci-optionrom-exec will still be in effect.
|
|
|
|
Signed-off-by: Leah Rowe <leah@libreboot.org>
|
|
---
|
|
src/optionroms.c | 6 +++++-
|
|
1 file changed, 5 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/src/optionroms.c b/src/optionroms.c
|
|
index e906ab9..db5e893 100644
|
|
--- a/src/optionroms.c
|
|
+++ b/src/optionroms.c
|
|
@@ -23,7 +23,7 @@
|
|
#include "util.h" // get_pnp_offset
|
|
#include "tcgbios.h" // tpm_*
|
|
|
|
-static int EnforceChecksum, S3ResumeVga, RunPCIroms;
|
|
+static int EnforceChecksum, S3ResumeVga, RunPCIroms, OnlyLoadOptionRoms;
|
|
|
|
|
|
/****************************************************************
|
|
@@ -34,6 +34,9 @@ static int EnforceChecksum, S3ResumeVga, RunPCIroms;
|
|
static void
|
|
__callrom(struct rom_header *rom, u16 offset, u16 bdf)
|
|
{
|
|
+ if (OnlyLoadOptionRoms)
|
|
+ return;
|
|
+
|
|
u16 seg = FLATPTR_TO_SEG(rom);
|
|
dprintf(1, "Running option rom at %04x:%04x\n", seg, offset);
|
|
|
|
@@ -461,6 +464,7 @@ vgarom_setup(void)
|
|
EnforceChecksum = romfile_loadint("etc/optionroms-checksum", 1);
|
|
S3ResumeVga = romfile_loadint("etc/s3-resume-vga-init", CONFIG_QEMU);
|
|
RunPCIroms = romfile_loadint("etc/pci-optionrom-exec", 2);
|
|
+ OnlyLoadOptionRoms = romfile_loadint("etc/only-load-option-roms", 0);
|
|
ScreenAndDebug = romfile_loadint("etc/screen-and-debug", 1);
|
|
|
|
// Clear option rom memory
|
|
--
|
|
2.25.1
|
|
|