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, 161 insertions, 0 deletions

diff --git a/drivers/parisc/Kconfig b/drivers/parisc/Kconfig
new file mode 100644
index 000000000..9cbcf1552
--- /dev/null
+++ b/drivers/parisc/Kconfig
@@ -0,0 +1,161 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menu "Bus options (PCI, PCMCIA, EISA, GSC, ISA)"
+
+config GSC
+	bool "VSC/GSC/HSC bus support"
+	select HAVE_EISA
+	select HAS_IOPORT
+	default y
+	help
+	  The VSC, GSC and HSC busses were used from the earliest 700-series
+	  workstations up to and including the C360/J2240 workstations.  They
+	  were also used in servers from the E-class to the K-class.  They
+	  are not found in B1000, C3000, J5000, A500, L1000, N4000 and upwards.
+	  If in doubt, say "Y".
+
+config HPPB
+	bool "HP-PB bus support"
+	depends on GSC
+	help
+	  The HP-PB bus was used in the Nova class and K-class servers.
+	  If in doubt, say "Y"
+
+config IOMMU_CCIO
+	bool "U2/Uturn I/O MMU"
+	depends on GSC
+	help
+	  Say Y here to enable DMA management routines for the first
+	  generation of PA-RISC cache-coherent machines.  Programs the
+	  U2/Uturn chip in "Virtual Mode" and use the I/O MMU.
+
+config GSC_LASI
+	bool "Lasi I/O support"
+	depends on GSC
+	help
+	  Say Y here to support the Lasi multifunction chip found in
+	  many PA-RISC workstations & servers.	It includes interfaces
+	  for a parallel port, serial port, NCR 53c710 SCSI, Apricot
+	  Ethernet, Harmony audio, PS/2 keyboard & mouse, ISDN, telephony
+	  and floppy.  Note that you must still enable all the individual
+	  drivers for these chips.
+
+config GSC_WAX
+	bool "Wax I/O support"
+	depends on GSC
+	help
+	  Say Y here to support the Wax multifunction chip found in some
+	  older systems, including B/C/D/R class and 715/64, 715/80 and
+	  715/100.  Wax includes an EISA adapter, a serial port (not always
+	  used), a HIL interface chip and is also known to be used as the
+	  GSC bridge for an X.25 GSC card.
+
+config ISA
+	bool "ISA support"
+	depends on EISA
+	help
+	  If you want to plug an ISA card into your EISA bus, say Y here.
+	  Most people should say N.
+
+config GSC_DINO
+	bool "GSCtoPCI/Dino PCI support"
+	depends on PCI && GSC
+	help
+	  Say Y here to support the Dino & Cujo GSC to PCI bridges found in
+	  machines from the B132 to the C360, the J2240 and the A180.  Some
+	  GSC/HSC cards (eg gigabit & dual 100 Mbit Ethernet) have a Dino on
+	  the card, and you also need to say Y here if you have such a card.
+	  Note that Dino also supplies one of the serial ports on certain
+	  machines.  If in doubt, say Y.
+
+config PCI_LBA
+	bool "LBA/Elroy PCI support"
+	depends on PCI
+	help
+	  Say Y here to support the Elroy PCI Lower Bus Adapter.  This is
+	  present on B, C, J, L and N-class machines with 4-digit model
+	  numbers and the A400/A500.
+
+config IOSAPIC
+	bool
+	depends on PCI_LBA
+	default PCI_LBA
+
+config IOMMU_SBA
+	bool
+	depends on PCI_LBA
+	default PCI_LBA
+
+endmenu
+
+menu "PA-RISC specific drivers"
+
+config SUPERIO
+	bool "SuperIO (SuckyIO) support"
+	depends on PCI_LBA
+	default y
+	help
+	  Say Y here to support the SuperIO chip found in Bxxxx, C3xxx and
+	  J5xxx+ machines. This enables IDE, Floppy, Parallel Port, and
+	  Serial port on those machines.
+
+config CHASSIS_LCD_LED
+	bool "Chassis LCD and LED support"
+	depends on LEDS_CLASS=y
+	default y
+	select LEDS_TRIGGERS
+	help
+	  Say Y here if you want to enable support for the Heartbeat,
+	  Disk/Network activities LEDs on some PA-RISC machines,
+	  or support for the LCD that can be found on recent material.
+	
+	  This has nothing to do with LED State support for A and E class.
+	
+	  If unsure, say Y.
+
+config PDC_CHASSIS
+	bool "PDC chassis state codes support"
+	default y
+	help
+	  Say Y here if you want to enable support for Chassis codes.
+	  That includes support for LED State front panel as found on E
+	  class, and support for the GSP Virtual Front Panel (LED State and
+	  message logging)  as found on high end servers such as A, L and
+	  N-class.
+	  This driver will also display progress messages on LCD display,
+	  such as "INI", "RUN" and "FLT", and might thus clobber messages
+	  shown by the LED/LCD driver.
+	  This driver updates the state panel (LED and/or LCD) upon system
+	  state change (eg: boot, shutdown or panic).
+	  
+	  If unsure, say Y.
+
+
+config PDC_CHASSIS_WARN
+	bool "PDC chassis warnings support"
+	depends on PROC_FS
+	default y
+	help
+	  Say Y here if you want to enable support for Chassis warnings.
+	  This will add a proc entry '/proc/chassis' giving some information
+	  about the overall health state of the system.
+	  This includes NVRAM battery level, overtemp or failures such as
+	  fans or power units.
+
+	  If unsure, say Y.
+
+
+config PDC_STABLE
+	tristate "PDC Stable Storage support"
+	depends on SYSFS
+	default y
+	help
+	  Say Y here if you want to enable support for accessing Stable Storage
+	  variables (PDC non volatile variables such as Primary Boot Path,
+	  Console Path, Autoboot, Autosearch, etc) through SysFS.
+	
+	  If unsure, say Y.
+	
+	  To compile this driver as a module, choose M here.
+	  The module will be called pdc_stable.
+
+endmenu