Re: [PATCH v4 1/2] efi_loader: make EFI_HAVE_RUNTIME_RESET a user-selectable option

[Heinrich Schuchardt]

Am 24. März 2026 18:59:12 MEZ schrieb Aswin Murugan <aswin.murugan at oss.qualcomm.com>:
>From: Aswin Murugan <aswin.murugan at oss.qualcomm.com>
>
>Expose EFI_HAVE_RUNTIME_RESET as a proper Kconfig boolean with a prompt
>so platforms can explicitly enable or disable advertising the EFI reset
>runtime service.
>
>The current PSCI-based EFI runtime reset implementation is always
>enabled whenever CONFIG_PSCI_RESET is selected, but it does not support
>passing the additional arguments required for specialized reset modes.
>As a result, reboot requests such as bootloader mode or EDL mode cannot
>be propagated correctly and instead fall back to a normal reboot.
>
>By making EFI_HAVE_RUNTIME_RESET user-configurable, platforms that
>depend on extended PSCI reset can now explicitly disable EFI runtime
>reset handling even when CONFIG_PSCI_RESET is enabled, ensuring
>that the kernel retains full control of advanced reboot paths.
>
>Default behavior for existing platforms remains unchanged.
>
>Signed-off-by: Aswin Murugan <aswin.murugan at oss.qualcomm.com>

Reviewed-by: Heinrich Schuchardt <xypron.glpk at gmx.de>


>---
> lib/efi_loader/Kconfig | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
>diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
>index 13e44be1d06..31d1c4fc257 100644
>--- a/lib/efi_loader/Kconfig
>+++ b/lib/efi_loader/Kconfig
>@@ -100,8 +100,7 @@ config EFI_SET_TIME
> 	  can be used by an EFI application to adjust the real time clock.
> 
> config EFI_HAVE_RUNTIME_RESET
>-	# bool "Reset runtime service is available"
>-	bool
>+	bool "Reset runtime service"
> 	default y
> 	depends on ARCH_BCM283X || FSL_LAYERSCAPE || PSCI_RESET || \
> 		   SANDBOX || SYSRESET_SBI || SYSRESET_X86