From 5febf432df1cfa5b25d99b54c32103fafbdd0eb9 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda Date: Sun, 16 Aug 2026 15:32:33 +0200 Subject: kbuild: rust: keep Rust objects out of Clang LTO with inline helpers Under `CONFIG_LTO_CLANG` + `CONFIG_RUST_INLINE_HELPERS`, one may hit `objtool` errors such as: vmlinux.o: error: objtool: _R..._3Gsp4boot+0xd6a: can't find jump dest instruction at .text._R..._3Gsp4boot+0x1dfd The reason is that in such builds, the Clang invocation that compiles the combined Rust plus helpers bitcode emits LLVM bitcode (again) -- the final code generation happens in the linker's LTO step, which the `-mllvm` trap options passed to Clang do not reach. This, in turn, means that unreachable traps are missing, and the impossible paths do not merely fallthrough to the next symbol, but past the end of their own section, since LTO builds place each function in its own section. Thus filter `CC_FLAGS_LTO` out of the Clang invocation, so that it always emits machine code directly, with the traps in place. Assisted-by: LLM Cc: Gary Guo Cc: Boqun Feng Cc: Alice Ryhl Cc: Matthew Maurer Cc: Josh Poimboeuf Cc: Peter Zijlstra Cc: stable@vger.kernel.org Fixes: 3a2486cc1da5 ("kbuild: rust: provide an option to inline C helpers into Rust") Acked-by: Gary Guo Link: https://patch.msgid.link/20260816133233.197500-2-ojeda@kernel.org Signed-off-by: Miguel Ojeda --- drivers/phy/mediatek/Kconfig | 100 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 drivers/phy/mediatek/Kconfig (limited to 'drivers/phy/mediatek/Kconfig') diff --git a/drivers/phy/mediatek/Kconfig b/drivers/phy/mediatek/Kconfig new file mode 100644 index 000000000..ba6461350 --- /dev/null +++ b/drivers/phy/mediatek/Kconfig @@ -0,0 +1,100 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Phy drivers for Mediatek devices +# +config PHY_MTK_PCIE + tristate "MediaTek PCIe-PHY Driver" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on OF + select GENERIC_PHY + help + Say 'Y' here to add support for MediaTek PCIe PHY driver. + This driver create the basic PHY instance and provides initialize + callback for PCIe GEN3 port, it supports software efuse + initialization. + +config PHY_MTK_XFI_TPHY + tristate "MediaTek 10GE SerDes XFI T-PHY driver" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on OF + select GENERIC_PHY + help + Say 'Y' here to add support for MediaTek XFI T-PHY driver. + The driver provides access to the Ethernet SerDes T-PHY supporting + 1GE and 2.5GE modes via the LynxI PCS, and 5GE and 10GE modes + via the USXGMII PCS found in MediaTek SoCs with 10G Ethernet. + +config PHY_MTK_TPHY + tristate "MediaTek T-PHY Driver" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on OF && OF_ADDRESS + depends on HAS_IOMEM + select GENERIC_PHY + help + Say 'Y' here to add support for MediaTek T-PHY driver, + it supports multiple usb2.0, usb3.0 ports, PCIe and + SATA, and meanwhile supports two version T-PHY which have + different banks layout, the T-PHY with shared banks between + multi-ports is first version, otherwise is second version, + so you can easily distinguish them by banks layout. + +config PHY_MTK_UFS + tristate "MediaTek UFS M-PHY driver" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on OF + select GENERIC_PHY + help + Support for UFS M-PHY on MediaTek chipsets. + Enable this to provide vendor-specific probing, + initialization, power on and power off flow of + specified M-PHYs. + +config PHY_MTK_XSPHY + tristate "MediaTek XS-PHY Driver" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on OF && OF_ADDRESS + depends on HAS_IOMEM + select GENERIC_PHY + help + Enable this to support the SuperSpeedPlus XS-PHY transceiver for + USB3.1 GEN2 controllers on MediaTek chips. The driver supports + multiple USB2.0, USB3.1 GEN2 ports. + +config PHY_MTK_HDMI + tristate "MediaTek HDMI-PHY Driver" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on COMMON_CLK + depends on OF + depends on REGULATOR + select GENERIC_PHY + help + Support HDMI PHY for Mediatek SoCs. + +config PHY_MTK_MIPI_CSI_0_5 + tristate "MediaTek MIPI CSI CD-PHY v0.5 Driver" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on OF + select GENERIC_PHY + help + Enable this to support the MIPI CSI CD-PHY receiver version 0.5. + The driver supports multiple CSI cdphy ports simultaneously. + + To compile this driver as a module, choose M here: the + module will be called phy-mtk-mipi-csi-0-5. + +config PHY_MTK_MIPI_DSI + tristate "MediaTek MIPI-DSI Driver" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on COMMON_CLK + depends on OF + select GENERIC_PHY + help + Support MIPI DSI for Mediatek SoCs. + +config PHY_MTK_DP + tristate "MediaTek DP-PHY Driver" + depends on ARCH_MEDIATEK || COMPILE_TEST + depends on OF + select GENERIC_PHY + help + Support DisplayPort PHY for MediaTek SoCs. -- cgit v1.3.1