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From 7dec74695751b70a8a86eb647062e7d5a5157446 Mon Sep 17 00:00:00 2001
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From: Jan Janssen <medhefgo@web.de>
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Date: Sun, 27 Nov 2022 13:56:18 +0100
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Subject: [PATCH] boot: Only do full driver initialization in VMs
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Doing the reconnect dance on some real firmware creates huge delays on
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boot. This should not be needed anymore as we now ask the firmware to
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make console devices and xbootldr partitions available explicitly in a
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more targeted fashion.
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Fixes: #25510
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(cherry picked from commit f6d59e2ebfc1bf50683a2e640aad501c372a50e4)
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Related: #2138081
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---
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src/boot/efi/boot.c | 6 ------
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src/boot/efi/vmm.c | 4 ++++
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2 files changed, 4 insertions(+), 6 deletions(-)
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diff --git a/src/boot/efi/boot.c b/src/boot/efi/boot.c
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index e182ee7840..5944451e6a 100644
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--- a/src/boot/efi/boot.c
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+++ b/src/boot/efi/boot.c
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@@ -2662,12 +2662,6 @@ EFI_STATUS efi_main(EFI_HANDLE image, EFI_SYSTEM_TABLE *sys_table) {
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/* Uncomment the next line if you need to wait for debugger. */
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// debug_break();
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- /* The firmware may skip initializing some devices for the sake of a faster boot. This is especially
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- * true for fastboot enabled firmwares. But this means that things we use like input devices or the
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- * xbootldr partition may not be available yet. Reconnect all drivers should hopefully make the
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- * firmware initialize everything we need. */
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- (void) reconnect_all_drivers();
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-
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err = BS->OpenProtocol(image,
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&LoadedImageProtocol,
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(void **)&loaded_image,
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diff --git a/src/boot/efi/vmm.c b/src/boot/efi/vmm.c
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index b1bfd778fc..2260b217b7 100644
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--- a/src/boot/efi/vmm.c
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+++ b/src/boot/efi/vmm.c
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@@ -83,6 +83,10 @@ EFI_STATUS vmm_open(EFI_HANDLE *ret_vmm_dev, EFI_FILE **ret_vmm_dir) {
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assert(ret_vmm_dev);
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assert(ret_vmm_dir);
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+ /* Make sure all file systems have been initialized. Only do this in VMs as this is slow
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+ * on some real firmwares. */
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+ (void) reconnect_all_drivers();
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+
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/* find all file system handles */
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err = BS->LocateHandleBuffer(ByProtocol, &FileSystemProtocol, NULL, &n_handles, &handles);
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if (err != EFI_SUCCESS)
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