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, 124 insertions, 0 deletions

diff --git a/drivers/message/fusion/Kconfig b/drivers/message/fusion/Kconfig
new file mode 100644
index 000000000..88a6e506a
--- /dev/null
+++ b/drivers/message/fusion/Kconfig
@@ -0,0 +1,124 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+menuconfig FUSION
+	bool "Fusion MPT device support"
+	depends on PCI && HAS_IOPORT
+	help
+	Say Y here to get to see options for Fusion Message
+	Passing Technology (MPT) drivers.
+	This option alone does not add any kernel code.
+
+	If you say N, all options in this submenu will be skipped and disabled.
+
+if FUSION
+
+config FUSION_SPI
+	tristate "Fusion MPT ScsiHost drivers for SPI"
+	depends on PCI && SCSI
+	select SCSI_SPI_ATTRS
+	help
+	  SCSI HOST support for a parallel SCSI host adapters.
+
+	  List of supported controllers:
+
+	  LSI53C1020
+	  LSI53C1020A
+	  LSI53C1030
+	  LSI53C1035
+	  ATTO UL4D
+
+config FUSION_FC
+	tristate "Fusion MPT ScsiHost drivers for FC"
+	depends on PCI && SCSI
+	depends on SCSI_FC_ATTRS
+	help
+	  SCSI HOST support for a Fiber Channel host adapters.
+
+	  List of supported controllers:
+
+	  LSIFC909
+	  LSIFC919
+	  LSIFC919X
+	  LSIFC929
+	  LSIFC929X
+	  LSIFC929XL
+	  LSIFC949X
+	  LSIFC949E
+	  Brocade FC 410/420
+
+config FUSION_SAS
+	tristate "Fusion MPT ScsiHost drivers for SAS"
+	depends on PCI && SCSI
+	select SCSI_SAS_ATTRS
+	help
+	  SCSI HOST support for a SAS host adapters.
+
+	  List of supported controllers:
+
+	  LSISAS1064
+	  LSISAS1068
+	  LSISAS1064E
+	  LSISAS1068E
+	  LSISAS1078
+
+config FUSION_MAX_SGE
+	int "Maximum number of scatter gather entries (16 - 128)"
+	default "128"
+	range 16 128
+	help
+	  This option allows you to specify the maximum number of scatter-
+	  gather entries per I/O. The driver default is 128, which matches
+	  SCSI_MAX_PHYS_SEGMENTS. However, it may decreased down to 16.
+	  Decreasing this parameter will reduce memory requirements
+	  on a per controller instance.
+
+config FUSION_CTL
+	tristate "Fusion MPT misc device (ioctl) driver"
+	depends on FUSION_SPI || FUSION_FC || FUSION_SAS
+	help
+	  The Fusion MPT misc device driver provides specialized control
+	  of MPT adapters via system ioctl calls.  Use of ioctl calls to
+	  the MPT driver requires that you create and use a misc device
+	  node ala:
+	  mknod /dev/mptctl c 10 240
+
+	  One use of this ioctl interface is to perform an upgrade (reflash)
+	  of the MPT adapter firmware.  Refer to readme file(s) distributed
+	  with the Fusion MPT linux driver for additional details.
+
+	  If enabled by saying M to this, a driver named: mptctl
+	  will be compiled.
+
+	  If unsure whether you really want or need this, say N.
+
+config FUSION_LAN
+	tristate "Fusion MPT LAN driver"
+	depends on FUSION_FC && NET_FC
+	help
+	  This module supports LAN IP traffic over Fibre Channel port(s)
+	  on Fusion MPT compatible hardware (LSIFC9xx chips).
+	  The physical interface used is defined in RFC 2625.
+	  Please refer to that document for details.
+
+	  Installing this driver requires the knowledge to configure and
+	  activate a new network interface, "fc0", using standard Linux tools.
+
+	  If enabled by saying M to this, a driver named: mptlan
+	  will be compiled.
+
+	  If unsure whether you really want or need this, say N.
+
+config FUSION_LOGGING
+	bool "Fusion MPT logging facility"
+	help
+	  This turns on a logging facility that can be used to debug a number
+	  of Fusion MPT related problems.
+
+	  The debug level can be programmed on the fly via SysFS (hex values)
+
+	  echo [level] > /sys/class/scsi_host/host#/debug_level
+
+	  There are various debug levels that can be found in the source:
+	  file:drivers/message/fusion/mptdebug.h
+
+endif # FUSION