arm64/boot: Disable trapping of PMZR_EL0 writes to EL2grafted

__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 <fuad.tabba@linux.dev>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Oliver Upton <oupton@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>

1 files changed, 145 insertions, 0 deletions

diff --git a/drivers/input/rmi4/Kconfig b/drivers/input/rmi4/Kconfig
new file mode 100644
index 000000000..5db58fc9e
--- /dev/null
+++ b/drivers/input/rmi4/Kconfig
@@ -0,0 +1,145 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# RMI4 configuration
+#
+config RMI4_CORE
+	tristate "Synaptics RMI4 bus support"
+	select IRQ_DOMAIN
+	help
+	  Say Y here if you want to support the Synaptics RMI4 bus.  This is
+	  required for all RMI4 device support.
+
+	  If unsure, say Y.
+
+if RMI4_CORE
+
+config RMI4_I2C
+	tristate "RMI4 I2C Support"
+	depends on I2C
+	help
+	  Say Y here if you want to support RMI4 devices connected to an I2C
+	  bus.
+
+	  If unsure, say Y.
+
+config RMI4_SPI
+	tristate "RMI4 SPI Support"
+	depends on SPI
+	help
+	  Say Y here if you want to support RMI4 devices connected to a SPI
+	  bus.
+
+	  If unsure, say N.
+
+config RMI4_SMB
+	tristate "RMI4 SMB Support"
+	depends on I2C
+	help
+	  Say Y here if you want to support RMI4 devices connected to an SMB
+	  bus.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the module will be
+	  called rmi_smbus.
+
+config RMI4_F03
+	bool "RMI4 Function 03 (PS2 Guest)"
+	depends on RMI4_CORE
+	help
+	  Say Y here if you want to add support for RMI4 function 03.
+
+	  Function 03 provides PS2 guest support for RMI4 devices. This
+	  includes support for TrackPoints on TouchPads.
+
+config RMI4_F03_SERIO
+	tristate
+	depends on RMI4_CORE
+	depends on RMI4_F03
+	default RMI4_CORE
+	select SERIO
+
+config RMI4_2D_SENSOR
+	bool
+
+config RMI4_F11
+	bool "RMI4 Function 11 (2D pointing)"
+	select RMI4_2D_SENSOR
+	help
+	  Say Y here if you want to add support for RMI4 function 11.
+
+	  Function 11 provides 2D multifinger pointing for touchscreens and
+	  touchpads. For sensors that support relative pointing, F11 also
+	  provides mouse input.
+
+config RMI4_F12
+	bool "RMI4 Function 12 (2D pointing)"
+	select RMI4_2D_SENSOR
+	help
+	  Say Y here if you want to add support for RMI4 function 12.
+
+	  Function 12 provides 2D multifinger pointing for touchscreens and
+	  touchpads. For sensors that support relative pointing, F12 also
+	  provides mouse input.
+
+config RMI4_F1A
+	bool "RMI4 Function 1A (0D pointing)"
+	help
+	  Say Y here if you want to add support for RMI4 function 1A.
+
+	  Function 1A provides capacitive keys support for RMI4 devices.
+
+config RMI4_F21
+	bool "RMI4 Function 21 (PRESSURE)"
+	help
+	  Say Y here if you want to add support for RMI4 function 21.
+
+	  Function 21 provides buttons/pressure handling for RMI4 devices.
+	  This includes support for buttons/pressure on PressurePad.
+
+config RMI4_F30
+	bool "RMI4 Function 30 (GPIO LED)"
+	help
+	  Say Y here if you want to add support for RMI4 function 30.
+
+	  Function 30 provides GPIO and LED support for RMI4 devices. This
+	  includes support for buttons on TouchPads and ClickPads.
+
+config RMI4_F34
+	bool "RMI4 Function 34 (Device reflash)"
+	select FW_LOADER
+	help
+	  Say Y here if you want to add support for RMI4 function 34.
+
+	  Function 34 provides support for upgrading the firmware on the RMI4
+	  device via the firmware loader interface. This is triggered using a
+	  sysfs attribute.
+
+config RMI4_F3A
+	bool "RMI4 Function 3A (GPIO)"
+	help
+	  Say Y here if you want to add support for RMI4 function 3A.
+
+	  Function 3A provides GPIO support for RMI4 devices. This includes
+	  support for buttons on TouchPads and ClickPads.
+
+config RMI4_F54
+	bool "RMI4 Function 54 (Analog diagnostics)"
+	depends on VIDEO_DEV=y || (RMI4_CORE=m && VIDEO_DEV=m)
+	select VIDEOBUF2_VMALLOC
+	select RMI4_F55
+	help
+	  Say Y here if you want to add support for RMI4 function 54
+
+	  Function 54 provides access to various diagnostic features in certain
+	  RMI4 touch sensors.
+
+config RMI4_F55
+	bool "RMI4 Function 55 (Sensor tuning)"
+	help
+	  Say Y here if you want to add support for RMI4 function 55
+
+	  Function 55 provides access to the RMI4 touch sensor tuning
+	  mechanism.
+
+endif # RMI_CORE