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qcom: Reduce boot time by avoiding unnecessary initialization and probes #128

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qcom: Reduce boot time by avoiding unnecessary initialization and probes #128

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5044572
mach-snapdragon: skip redundant SCSI rescan for capsule updates
aswinm94 Aug 25, 2026
244f14a
efi_loader: skip fs probe for non-ESP GPT partitions
aswinm94 Aug 25, 2026
ae85b89
configs: qcom: disable malloc pool zero-init on boot
aswinm94 Aug 25, 2026
c8827d9
arm: mach-snapdragon: use cache-aligned buffer for FIT FAT read
aswinm94 Aug 25, 2026
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3 changes: 2 additions & 1 deletion arch/arm/mach-snapdragon/capsule_update.c
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Original file line number Diff line number Diff line change
Expand Up @@ -624,7 +624,8 @@ void qcom_configure_capsule_updates(void)
}
memset(partitions, 0, sizeof(qcom_partitions));

if (IS_ENABLED(CONFIG_SCSI)) {
if (IS_ENABLED(CONFIG_SCSI) && !uclass_id_count(UCLASS_SCSI)) {
/* Scan for SCSI devices, unless already scanned earlier in boot */
ret = scsi_scan(false);
if (ret) {
debug("Failed to scan SCSI devices: %d\n", ret);
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3 changes: 2 additions & 1 deletion arch/arm/mach-snapdragon/qcom_fit_multidtb.c
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Expand Up @@ -17,6 +17,7 @@
#include <lmb.h>
#include <log.h>
#include <malloc.h>
#include <memalign.h>
#include <part.h>
#include <linux/errno.h>
#include <linux/kernel.h>
Expand Down Expand Up @@ -642,7 +643,7 @@ static int qcom_load_fit_image(const char *filename, const char *partname,
if (!ret) {
fat_size(filename, &file_size);

fit_buf = malloc(file_size);
fit_buf = malloc_cache_aligned(file_size);
if (!fit_buf)
return -ENOMEM;

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1 change: 1 addition & 0 deletions configs/qcom_defconfig
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Expand Up @@ -18,6 +18,7 @@ CONFIG_BUTTON_CMD=y
CONFIG_FIT=y
CONFIG_FIT_VERBOSE=y
CONFIG_QCOM_FIT_MULTIDTB=y
# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
CONFIG_BOOTSTD_FULL=y
# CONFIG_BOOTMETH_VBE is not set
CONFIG_BOOTDELAY=1
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4 changes: 4 additions & 0 deletions lib/efi_loader/efi_disk.c
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Expand Up @@ -529,8 +529,12 @@ static efi_status_t efi_disk_add_dev(
/*
* On partitions or whole disks without partitions install the
* simple file system protocol if a file system is available.
*
* Skip the filesystem probe for non-ESP GPT partitions: only the ESP
* is ever opened as a filesystem before boot.
*/
if ((part || desc->part_type == PART_TYPE_UNKNOWN) &&
(!part_info || (part_info->bootable & PART_EFI_SYSTEM_PARTITION)) &&
efi_fs_exists(desc, part)) {
ret = efi_create_simple_file_system(desc, part, diskobj->dp,
&diskobj->volume);
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