On 2/13/2026 4:55 PM, Ilias Apalodimas wrote:
Hi Ashwin
On Fri, 13 Feb 2026 at 13:06, Aswin Murugan
<[email protected]> wrote:
The current PSCI-based EFI runtime reset implementation is always enabled
when CONFIG_PSCI_RESET is set, but it does not support the extra arguments
required for specialized reset modes. As a result, reboot requests such as
bootloader mode or EDL mode are ignored and fall back to a normal reboot.
Add CONFIG_EFI_PSCI_RESET_RUNTIME to give platforms explicit control over
Is there anything missing and you can't use EFI_HAVE_RUNTIME_RESET?
Thanks for the feedback, Ilias
This is a kernel‑level limitation based on drivers/firmware/efi/reboot.c
[1] implementation in Linux. The efi_reboot function intentionally
ignores the reboot data string and always passes NULL to ResetSystem. As
a result, special reboot modes like "bootloader" or "recovery" aren’t
forwarded through EFI_HAVE_RUNTIME_RESET.
[1]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/firmware/efi/reboot.c?h=v6.13#n46
the PSCI-specific EFI runtime reset path. This allows a platform to disable
U-Boot's PSCI reset handler when needed so that the kernel can perform the
reset with the correct arguments for special reboot modes.
The option defaults to enabled to maintain backward compatibility with the
existing behavior.
Signed-off-by: Aswin Murugan <[email protected]>
---
Changes in v3:
- Commit message has been updated, no change in code
Changes in v2:
- As per review comments made default y for EFI_PSCI_RESET_RUNTIME config
---
drivers/firmware/psci.c | 4 ++--
lib/efi_loader/Kconfig | 8 ++++++++
2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/firmware/psci.c b/drivers/firmware/psci.c
index 2e3223e1c32..009c6153d0c 100644
--- a/drivers/firmware/psci.c
+++ b/drivers/firmware/psci.c
@@ -244,7 +244,7 @@ static void __maybe_unused do_psci_probe(void)
uclass_get_device_by_name(UCLASS_FIRMWARE, DRIVER_NAME, &dev);
}
-#if IS_ENABLED(CONFIG_EFI_LOADER) && IS_ENABLED(CONFIG_PSCI_RESET)
+#if IS_ENABLED(CONFIG_EFI_PSCI_RESET_RUNTIME)
efi_status_t efi_reset_system_init(void)
{
do_psci_probe();
@@ -266,7 +266,7 @@ void __efi_runtime EFIAPI efi_reset_system(enum
efi_reset_type reset_type,
while (1)
;
}
-#endif /* IS_ENABLED(CONFIG_EFI_LOADER) && IS_ENABLED(CONFIG_PSCI_RESET) */
+#endif /* IS_ENABLED(CONFIG_EFI_PSCI_RESET_RUNTIME) */
You also have to adjust the RT config table in
lib/efi_loader/efi_runtime.c, but I really think we should reuse
EFI_HAVE_RUNTIME_RESET
EFI_HAVE_RUNTIME_RESET is enabled by default & depends on PSCI_RESET config,
So even if i disabled EFI_HAVE_RUNTIME_RESET on defconfig it was
overridden, since PSCI_RESET is enabled it was auto enabling it, hence
introduced a new config CONFIG_EFI_PSCI_RESET_RUNTIME to control psci
based EFI runtime reset control.
Thanks,
Aswin
Cheers
/Ilias
#ifdef CONFIG_PSCI_RESET
void reset_misc(void)
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index 13e44be1d06..3882de273bb 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -106,6 +106,14 @@ config EFI_HAVE_RUNTIME_RESET
depends on ARCH_BCM283X || FSL_LAYERSCAPE || PSCI_RESET || \
SANDBOX || SYSRESET_SBI || SYSRESET_X86
+config EFI_PSCI_RESET_RUNTIME
+ bool "EFI Runtime PSCI Reset Support"
+ default y if EFI_LOADER && PSCI_RESET
+ depends on ARM_PSCI_FW
+ help
+ Enable PSCI-based reset implementation for EFI runtime services.
+ This allows the OS to reset the system through EFI runtime calls.
+
endmenu
menu "UEFI Variables"
--
2.34.1
