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/platform/Makefile | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 drivers/platform/Makefile (limited to 'drivers/platform/Makefile') diff --git a/drivers/platform/Makefile b/drivers/platform/Makefile new file mode 100644 index 000000000..fa322e7f8 --- /dev/null +++ b/drivers/platform/Makefile @@ -0,0 +1,17 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for linux/drivers/platform +# + +obj-$(CONFIG_X86) += x86/ +obj-$(CONFIG_LOONGARCH) += loongarch/ +obj-$(CONFIG_MELLANOX_PLATFORM) += mellanox/ +obj-$(CONFIG_MIPS) += mips/ +obj-$(CONFIG_OLPC_EC) += olpc/ +obj-$(CONFIG_GOLDFISH) += goldfish/ +obj-$(CONFIG_CHROME_PLATFORMS) += chrome/ +obj-$(CONFIG_CZNIC_PLATFORMS) += cznic/ +obj-$(CONFIG_SURFACE_PLATFORMS) += surface/ +obj-$(CONFIG_ARM64_PLATFORM_DEVICES) += arm64/ +obj-$(CONFIG_BCM2835_VCHIQ) += raspberrypi/ +obj-$(CONFIG_ACPI_WMI) += wmi/ -- cgit v1.3.1