From 2bc6b218717b9d08f466f88209251d54bc09b207 Mon Sep 17 00:00:00 2001 From: Fuad Tabba Date: Tue, 22 Sep 2026 19:14:30 +0100 Subject: arm64/boot: Disable trapping of PMZR_EL0 writes to EL2 __init_el2_fgt2() writes one mask to both HDFGRTR2_EL2 and HDFGWTR2_EL2. PMZR_EL0 is write-only, so its trap bit, nPMZR_EL0, exists only in HDFGWTR2_EL2 and is therefore never set: a PMZR_EL0 write from the host traps to EL2, where the nVHE hypervisor has no handler and BUG()s. The kernel never writes PMZR_EL0, but kernel.perf_user_access=1 has the PMU driver set PMUSERENR_EL0.UEN for a task with a user-read event, so a write from EL0 reaches the trap and takes the host down without a panic message. Accumulate the HDFGWTR2_EL2 bits separately, as __init_el2_fgt() already does for HDFGWTR_EL2, and set nPMZR_EL0 with the other FEAT_PMUv3p9 bits. Fixes: 858c7bfcb35e1 ("arm64/boot: Enable EL2 requirements for FEAT_PMUv3p9") Cc: stable@vger.kernel.org Signed-off-by: Fuad Tabba Reviewed-by: Anshuman Khandual Reviewed-by: Oliver Upton Signed-off-by: Will Deacon --- drivers/android/Kconfig | 65 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 drivers/android/Kconfig (limited to 'drivers/android/Kconfig') diff --git a/drivers/android/Kconfig b/drivers/android/Kconfig new file mode 100644 index 000000000..606a9d07f --- /dev/null +++ b/drivers/android/Kconfig @@ -0,0 +1,65 @@ +# SPDX-License-Identifier: GPL-2.0 +menu "Android" + +config ANDROID_BINDER_IPC + bool "Android Binder IPC Driver" + depends on MMU + depends on NET + default n + help + Binder is used in Android for both communication between processes, + and remote method invocation. + + This means one Android process can call a method/routine in another + Android process, using Binder to identify, invoke and pass arguments + between said processes. + +config ANDROID_BINDER_IPC_RUST + bool "Rust version of Android Binder IPC Driver" + depends on RUST && MMU && NET && !ANDROID_BINDER_IPC + help + This enables the Rust implementation of the Binder driver. + + Binder is used in Android for both communication between processes, + and remote method invocation. + + This means one Android process can call a method/routine in another + Android process, using Binder to identify, invoke and pass arguments + between said processes. + +config ANDROID_BINDERFS + bool "Android Binderfs filesystem" + depends on ANDROID_BINDER_IPC + default n + help + Binderfs is a pseudo-filesystem for the Android Binder IPC driver + which can be mounted per-ipc namespace allowing to run multiple + instances of Android. + Each binderfs mount initially only contains a binder-control device. + It can be used to dynamically allocate new binder IPC devices via + ioctls. + +config ANDROID_BINDER_DEVICES + string "Android Binder devices" + depends on ANDROID_BINDER_IPC || ANDROID_BINDER_IPC_RUST + default "binder,hwbinder,vndbinder" + help + Default value for the binder.devices parameter. + + The binder.devices parameter is a comma-separated list of strings + that specifies the names of the binder device nodes that will be + created. Each binder device has its own context manager, and is + therefore logically separated from the other devices. + +config ANDROID_BINDER_ALLOC_KUNIT_TEST + tristate "KUnit Tests for Android Binder Alloc" if !KUNIT_ALL_TESTS + depends on ANDROID_BINDER_IPC && KUNIT + default KUNIT_ALL_TESTS + help + This feature builds the binder alloc KUnit tests. + + Each test case runs using a pared-down binder_alloc struct and + test-specific freelist, which allows this KUnit module to be loaded + for testing without interfering with a running system. + +endmenu -- cgit v1.3.1