Introduce a config option where the user can enable support for adding/removing device tree nodes using a device tree binary overlay.
Update SUPPORT.md and CHANGELOG.md to state the Device Tree Overlays support for Arm. Signed-off-by: Vikram Garhwal <[email protected]> Acked-by: Henry Wang <[email protected]> Reviewed-by: Michal Orzel <[email protected]> Acked-by: Stefano Stabellini <[email protected]> --- Changes from v9: Fix style. Changes from v7: Add this feature as "experimental support" in CHANGELOG.md --- --- CHANGELOG.md | 2 ++ SUPPORT.md | 6 ++++++ xen/arch/arm/Kconfig | 5 +++++ 3 files changed, 13 insertions(+) diff --git a/CHANGELOG.md b/CHANGELOG.md index 2516526589..24636b8eaf 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -27,6 +27,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) - On Arm, add suport for Firmware Framework for Arm A-profile (FF-A) Mediator (Tech Preview) - Add Intel Hardware P-States (HWP) cpufreq driver. + - On Arm, experimental support for dynamic addition/removal of Xen device tree + nodes using a device tree overlay binary (.dtbo). ### Removed - On x86, the "pku" command line option has been removed. It has never diff --git a/SUPPORT.md b/SUPPORT.md index 6ce0ec29b0..3461f5cf2f 100644 --- a/SUPPORT.md +++ b/SUPPORT.md @@ -855,6 +855,12 @@ xen/arch/arm/tee/ffa.c for limitations. Status: Supported +### Device Tree Overlays + +Add/Remove device tree nodes using a device tree overlay binary (.dtbo). + + Status, ARM: Experimental + ### ARM: Guest ACPI support Status: Supported diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig index 57bd1d01d7..650aca99ac 100644 --- a/xen/arch/arm/Kconfig +++ b/xen/arch/arm/Kconfig @@ -92,6 +92,11 @@ config HAS_ITS bool "GICv3 ITS MSI controller support (UNSUPPORTED)" if UNSUPPORTED depends on GICV3 && !NEW_VGIC && !ARM_32 +config OVERLAY_DTB + bool "DTB overlay support (UNSUPPORTED)" if UNSUPPORTED + help + Dynamic addition/removal of Xen device tree nodes using a dtbo. + config HVM def_bool y -- 2.17.1
