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This means an idle guest won't needlessly consume an entire core on
the host, waiting for work to show up.
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Acked-by: Scott Wood <oss@buserror.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220112112459.1033754-1-troglobit@gmail.com
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The link stack flush status is not visible in debugfs. It can be enabled
even when count cache flush is disabled. Add separate file for its
status.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
[mpe: Update for change to link_stack_flush_type]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191127220959.6208-1-msuchanek@suse.de
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Cédric pointed out that XIVE IPI information exported via sysfs
(debug/powerpc/xive) display empty lines for processors which are
not online.
Switch to using for_each_online_cpu() so that information is
displayed for online-only processors.
Reported-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Sachin Sant <sachinp@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/164146703333.19039.10920919226094771665.sendpatchset@MacBook-Pro.local
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MMIO emulation can fail if the guest uses an instruction that we are
not prepared to emulate. Since these instructions can be and most
likely are valid ones, this is (slightly) closer to an access fault
than to an illegal instruction, so deliver a Data Storage interrupt
instead of a Program interrupt.
BookE ignores bad faults, so it will keep using a Program interrupt
because a DSI would cause a fault loop in the guest.
Suggested-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220125215655.1026224-6-farosas@linux.ibm.com
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If MMIO emulation fails we don't want to crash the whole guest by
returning to userspace.
The original commit bbf45ba57eae ("KVM: ppc: PowerPC 440 KVM
implementation") added a todo:
/* XXX Deliver Program interrupt to guest. */
and later the commit d69614a295ae ("KVM: PPC: Separate loadstore
emulation from priv emulation") added the Program interrupt injection
but in another file, so I'm assuming it was missed that this block
needed to be altered.
Also change the message to a ratelimited one since we're letting the
guest run and it could flood the host logs.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220125215655.1026224-5-farosas@linux.ibm.com
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The MMIO interface between the kernel and userspace uses a structure
that supports a maximum of 8-bytes of data. Instructions that access
more than that need to be emulated in parts.
We currently don't have generic support for splitting the emulation in
parts and each set of instructions needs to be explicitly included.
There's already an error message being printed when a load or store
exceeds the mmio.data buffer but we don't fail the emulation until
later at kvmppc_complete_mmio_load and even then we allow userspace to
make a partial copy of the data, which ends up overwriting some fields
of the mmio structure.
This patch makes the emulation fail earlier at kvmppc_handle_load|store,
which will send a Program interrupt to the guest. This is better than
allowing the guest to proceed with partial data.
Note that this was caught in a somewhat artificial scenario using
quadword instructions (lq/stq), there's no account of an actual guest
in the wild running instructions that are not properly emulated.
(While here, remove the "bad MMIO" messages. The caller already has an
error message.)
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220125215655.1026224-4-farosas@linux.ibm.com
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The MMIO emulation code for vector instructions is duplicated between
VSX and VMX. When emulating VMX we should check the VMX copy size
instead of the VSX one.
Fixes: acc9eb9305fe ("KVM: PPC: Reimplement LOAD_VMX/STORE_VMX instruction ...")
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220125215655.1026224-3-farosas@linux.ibm.com
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Our kvm_arch_vcpu_ioctl_run currently returns the RESUME_HOST values
to userspace, against the API of the KVM_RUN ioctl which returns 0 on
success.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220125215655.1026224-2-farosas@linux.ibm.com
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allows, among other things, to drop !DCACHE_WORD_ACCESS mess in
x86 csum-partial_64.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Some of them used to be used by libbfd for a.out coredump handling.
Seeing that
* libbfd has their copies anyway
* we don't export them into userland headers
* we don't support a.out coredumps anymore
let's bury the definitions. They never had in-kernel
users anyway...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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It makes no sense to leave crc32_be using the generic code while we
only accelerate the little-endian ops.
Even though the big-endian form doesn't fit as smoothly into the arm64,
we can speed it up and avoid hitting the D cache.
Tested on Cortex-A53. Without acceleration:
crc32: CRC_LE_BITS = 64, CRC_BE BITS = 64
crc32: self tests passed, processed 225944 bytes in 192240 nsec
crc32c: CRC_LE_BITS = 64
crc32c: self tests passed, processed 112972 bytes in 21360 nsec
With acceleration:
crc32: CRC_LE_BITS = 64, CRC_BE BITS = 64
crc32: self tests passed, processed 225944 bytes in 53480 nsec
crc32c: CRC_LE_BITS = 64
crc32c: self tests passed, processed 112972 bytes in 21480 nsec
Signed-off-by: Kevin Bracey <kevin@bracey.fi>
Tested-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Use SPDX-License-Identifier instead of a verbose license text and
update external link.
Cc: James Guilford <james.guilford@intel.com>
Cc: Sean Gulley <sean.m.gulley@intel.com>
Cc: Chandramouli Narayanan <mouli@linux.intel.com>
Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Pull x86 fixes from Borislav Petkov:
- Add another Intel CPU model to the list of CPUs supporting the
processor inventory unique number
- Allow writing to MCE thresholding sysfs files again - a previous
change had accidentally disabled it and no one noticed. Goes to show
how much is this stuff used
* tag 'x86_urgent_for_v5.17_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu: Add Xeon Icelake-D to list of CPUs that support PPIN
x86/MCE/AMD: Allow thresholding interface updates after init
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Fixes dtbs_check warnings like:
dmac@ff240000: $nodename:0: 'dmac@ff240000' does not match '^dma-controller(@.*)?$'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20220129175429.298836-1-krzysztof.kozlowski@canonical.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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There are signal integrity issues running the eMMC at 200MHz on Puma
RK3399-Q7.
Similar to the work-around found for RK3399 Gru boards, lowering the
frequency to 100MHz made the eMMC much more stable, so let's lower the
frequency to 100MHz.
It might be possible to run at 150MHz as on RK3399 Gru boards but only
100MHz was extensively tested.
Cc: Quentin Schulz <foss+kernel@0leil.net>
Signed-off-by: Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Link: https://lore.kernel.org/r/20220119134948.1444965-1-quentin.schulz@theobroma-systems.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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The Quartz64 Model A uses a voltage divider to ensure ddr voltage is
within specification from the default regulator configuration.
Adjusting this voltage is detrimental, and currently causes the ddr
voltage to be about 0.8v.
Remove the min and max voltage setpoints for the ddr regulator.
Fixes: b33a22a1e7c4 ("arm64: dts: rockchip: add basic dts for Pine64 Quartz64-A")
Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Link: https://lore.kernel.org/r/20220128003809.3291407-2-pgwipeout@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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'd' and 's' are initialised later with 'dest_w' and 'src_w', so we need not
initialise them before that.
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp>
Signed-off-by: Stafford Horne <shorne@gmail.com>
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In linux-next, IA64_MCA_RECOVERY uses the (new) function
make_task_dead(), which is not exported for use by modules. Instead of
exporting it for one user, convert IA64_MCA_RECOVERY to be a bool
Kconfig symbol.
In a config file from "kernel test robot <lkp@intel.com>" for a
different problem, this linker error was exposed when
CONFIG_IA64_MCA_RECOVERY=m.
Fixes this build error:
ERROR: modpost: "make_task_dead" [arch/ia64/kernel/mca_recovery.ko] undefined!
Link: https://lkml.kernel.org/r/20220124213129.29306-1-rdunlap@infradead.org
Fixes: 0e25498f8cd4 ("exit: Add and use make_task_dead.")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The empty unmap_page_from_agp() macro causes a warning when
building with 'make W=1' on a couple of architectures:
drivers/char/agp/generic.c: In function 'agp_generic_destroy_page':
drivers/char/agp/generic.c:1265:28: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
1265 | unmap_page_from_agp(page);
Change the definitions to a 'do { } while (0)' construct to
make these more reliable.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Helge Deller <deller@gmx.de> # parisc
Signed-off-by: Helge Deller <deller@gmx.de>
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The Cadence GEM/MACB driver now utilizes the platform-level reset on the
ZynqMP platform. Add reset definitions to the ZynqMP platform device
tree to allow this to be used.
Signed-off-by: Robert Hancock <robert.hancock@calian.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The Quartz64-A has a 40 pin connector that exposes various functions.
Annotate the functions exposed in the device tree.
Enable i2c3, which is pulled up to vcc_3v3 on board.
The following functions are currently exposed:
i2c3
spi1
uart2
uart0
spdif
Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Link: https://lore.kernel.org/r/20220128003809.3291407-5-pgwipeout@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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The sdmmc1 node on Quartz64-A supports the optional wifi module from
Pine64.
Add the sdmmc1 node and requisite sdio_pwrseq to enable wifi support on
the Quartz64-A.
Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Link: https://lore.kernel.org/r/20220128003809.3291407-4-pgwipeout@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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Several io power domains on the Quartz64-A operate at 1.8v.
Add the pmu_io_domains definition to enable support for this.
This permits the enablement of the following features:
sdio - wifi support
sdhci - mmc-hs200-1_8v
Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Link: https://lore.kernel.org/r/20220128003809.3291407-3-pgwipeout@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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The Rockchip RK3568 EVB1 comes with a mounted touch display featuring
a Goodix GT1158 touch controller (according to the product ID register).
Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.kernel.org/r/20220129162440.5415-2-michael.riesch@wolfvision.net
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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The voltages VCC3V3_LCD{0,1} can be enabled with the pins GPIO0_C7 and
GPIO0_C5, respectively. This patch modifies the device tree in order to
reflect this.
Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.kernel.org/r/20220129162440.5415-1-michael.riesch@wolfvision.net
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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Pull pci fixes from Bjorn Helgaas:
- Fix compilation warnings in new mt7621 driver (Sergio Paracuellos)
- Restore the sysfs "rom" file for VGA shadow ROMs, which was broken
when converting "rom" to be a static attribute (Bjorn Helgaas)
* tag 'pci-v5.17-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI/sysfs: Find shadow ROM before static attribute initialization
PCI: mt7621: Remove unused function pcie_rmw()
PCI: mt7621: Drop of_match_ptr() to avoid unused variable
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Pull powerpc fixes from Michael Ellerman:
- Fix VM debug warnings on boot triggered via __set_fixmap().
- Fix a debug warning in the 64-bit Book3S PMU handling code.
- Fix nested guest HFSCR handling with multiple vCPUs on Power9 or
later.
- Fix decrementer storm caused by a recent change, seen with some
configs.
Thanks to Alexey Kardashevskiy, Athira Rajeev, Christophe Leroy,
Fabiano Rosas, Maxime Bizon, Nicholas Piggin, and Sachin Sant.
* tag 'powerpc-5.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/64s/interrupt: Fix decrementer storm
KVM: PPC: Book3S HV Nested: Fix nested HFSCR being clobbered with multiple vCPUs
powerpc/perf: Fix power_pmu_disable to call clear_pmi_irq_pending only if PMI is pending
powerpc/fixmap: Fix VM debug warning on unmap
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Adds device tree node for SPI IPs
Cc: linux-fsd@tesla.com
Signed-off-by: Aswani Reddy <aswani.reddy@samsung.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Andi Shyti <andi@etezian.org>
Link: https://lore.kernel.org/r/20220125031604.76009-4-alim.akhtar@samsung.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
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Pull arm64 fixes from Catalin Marinas:
- Errata workarounds for Cortex-A510: broken hardware dirty bit
management, detection code for the TRBE (tracing) bugs with the
actual fixes going in via the CoreSight tree.
- Cortex-X2 errata handling for TRBE (inheriting the workarounds from
Cortex-A710).
- Fix ex_handler_load_unaligned_zeropad() to use the correct struct
members.
- A couple of kselftest fixes for FPSIMD.
- Silence the vdso "no previous prototype" warning.
- Mark start_backtrace() notrace and NOKPROBE_SYMBOL.
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: cpufeature: List early Cortex-A510 parts as having broken dbm
kselftest/arm64: Correct logging of FPSIMD register read via ptrace
kselftest/arm64: Skip VL_INHERIT tests for unsupported vector types
arm64: errata: Add detection for TRBE trace data corruption
arm64: errata: Add detection for TRBE invalid prohibited states
arm64: errata: Add detection for TRBE ignored system register writes
arm64: Add Cortex-A510 CPU part definition
arm64: extable: fix load_unaligned_zeropad() reg indices
arm64: Mark start_backtrace() notrace and NOKPROBE_SYMBOL
arm64: errata: Update ARM64_ERRATUM_[2119858|2224489] with Cortex-X2 ranges
arm64: Add Cortex-X2 CPU part definition
arm64: vdso: Fix "no previous prototype" warning
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The port node does not have a unit-address, remove it.
This fixes the warnings:
lcd-controller@30320000: 'port' is a required property
lcd-controller@30320000: 'port@0' does not match any of the regexes:
'pinctrl-[0-9]+'
Fixes: commit d0081bd02a03 ("arm64: dts: imx8mq: Add NWL MIPI DSI controller")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Since the previous commit fixed a hardware description bug for imx8mq,
we need to fix up all DT users like this. The mipi_csi port@0
is connected to the sensor, not port@1.
Fixes: fed7603597fa ("arm64: dts: imx8mq-librem5: describe the selfie cam")
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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The port numbers for the imx8mq mipi csi controller are wrong and
the mipi driver can't find any media devices as port@1 is connected
to the CSI bridge, not port@0. And port@0 is connected to the
source - the sensor. Fix this.
Fixes: bcadd5f66c2a ("arm64: dts: imx8mq: add mipi csi phy and csi bridge descriptions")
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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The correct property name is 'assigned-clock-parents', not
'assigned-clocks-parents'. Though if the platform works with the typo, one
has to wonder if the property is even needed.
Signed-off-by: Rob Herring <robh@kernel.org>
Fixes: 8b8c7d97e2c7 ("ARM: dts: imx7ulp: Add wdog1 node")
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Since ref_gpmi is sourced from pll0 (480MHz), It allows the GPMI
controller to manage High-Speed NAND Timing (edo mode 3,4 and 5).
Co-developed-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Tested-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Commit dd3d936a1b17 ("arm64: dts: ls1028a: add ftm_alarm1 node to be
used as wakeup source") disables ftm_alarm0 in the SoC dtsi but doesn't
enable it on the board which is still using it. Re-enable it on the sl28
board.
Fixes: dd3d936a1b17 ("arm64: dts: ls1028a: add ftm_alarm1 node to be used as wakeup source")
Reported-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Reported-by: "kernelci.org bot" <bot@kernelci.org>
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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The audio codec connection on MBa8Mx is identical to MBa7 (imx7) and MBa6
(imx6). Use the same sound card model as well.
Fixes commit dfcd1b6f7620 ("arm64: dts: freescale: add initial device tree
for TQMa8MQML with i.MX8MM")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Pulltracing fixes from Steven Rostedt:
- Limit mcount build time sorting to only those archs that we know it
works for.
- Fix memory leak in error path of histogram setup
- Fix and clean up rel_loc array out of bounds issue
- tools/rtla documentation fixes
- Fix issues with histogram logic
* tag 'trace-v5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Don't inc err_log entry count if entry allocation fails
tracing: Propagate is_signed to expression
tracing: Fix smatch warning for do while check in event_hist_trigger_parse()
tracing: Fix smatch warning for null glob in event_hist_trigger_parse()
tools/tracing: Update Makefile to build rtla
rtla: Make doc build optional
tracing/perf: Avoid -Warray-bounds warning for __rel_loc macro
tracing: Avoid -Warray-bounds warning for __rel_loc macro
tracing/histogram: Fix a potential memory leak for kstrdup()
ftrace: Have architectures opt-in for mcount build time sorting
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Pull kvm fixes from Paolo Bonzini:
"Two larger x86 series:
- Redo incorrect fix for SEV/SMAP erratum
- Windows 11 Hyper-V workaround
Other x86 changes:
- Various x86 cleanups
- Re-enable access_tracking_perf_test
- Fix for #GP handling on SVM
- Fix for CPUID leaf 0Dh in KVM_GET_SUPPORTED_CPUID
- Fix for ICEBP in interrupt shadow
- Avoid false-positive RCU splat
- Enable Enlightened MSR-Bitmap support for real
ARM:
- Correctly update the shadow register on exception injection when
running in nVHE mode
- Correctly use the mm_ops indirection when performing cache
invalidation from the page-table walker
- Restrict the vgic-v3 workaround for SEIS to the two known broken
implementations
Generic code changes:
- Dead code cleanup"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (43 commits)
KVM: eventfd: Fix false positive RCU usage warning
KVM: nVMX: Allow VMREAD when Enlightened VMCS is in use
KVM: nVMX: Implement evmcs_field_offset() suitable for handle_vmread()
KVM: nVMX: Rename vmcs_to_field_offset{,_table}
KVM: nVMX: eVMCS: Filter out VM_EXIT_SAVE_VMX_PREEMPTION_TIMER
KVM: nVMX: Also filter MSR_IA32_VMX_TRUE_PINBASED_CTLS when eVMCS
selftests: kvm: check dynamic bits against KVM_X86_XCOMP_GUEST_SUPP
KVM: x86: add system attribute to retrieve full set of supported xsave states
KVM: x86: Add a helper to retrieve userspace address from kvm_device_attr
selftests: kvm: move vm_xsave_req_perm call to amx_test
KVM: x86: Sync the states size with the XCR0/IA32_XSS at, any time
KVM: x86: Update vCPU's runtime CPUID on write to MSR_IA32_XSS
KVM: x86: Keep MSR_IA32_XSS unchanged for INIT
KVM: x86: Free kvm_cpuid_entry2 array on post-KVM_RUN KVM_SET_CPUID{,2}
KVM: nVMX: WARN on any attempt to allocate shadow VMCS for vmcs02
KVM: selftests: Don't skip L2's VMCALL in SMM test for SVM guest
KVM: x86: Check .flags in kvm_cpuid_check_equal() too
KVM: x86: Forcibly leave nested virt when SMM state is toggled
KVM: SVM: drop unnecessary code in svm_hv_vmcb_dirty_nested_enlightenments()
KVM: SVM: hyper-v: Enable Enlightened MSR-Bitmap support for real
...
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Pull MIPS build fix from Thomas Bogendoerfer:
"Fix for allmodconfig build"
* tag 'mips-fixes-5.17_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
MIPS: Fix build error due to PTR used in more places
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Pull s390 fixes from Vasily Gorbik:
- Fix loading of modules with lots of relocations and add a regression
test for it.
- Fix machine check handling for vector validity and guarded storage
validity failures in KVM guests.
- Fix hypervisor performance data to include z/VM guests with access
control group set.
- Fix z900 build problem in uaccess code.
- Update defconfigs.
* tag 's390-5.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/hypfs: include z/VM guests with access control group set
s390: update defconfigs
s390/module: test loading modules with a lot of relocations
s390/module: fix loading modules with a lot of relocations
s390/uaccess: fix compile error
s390/nmi: handle vector validity failures for KVM guests
s390/nmi: handle guarded storage validity failures for KVM guests
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Versions of Cortex-A510 before r0p3 are affected by a hardware erratum
where the hardware update of the dirty bit is not correctly ordered.
Add these cpus to the cpu_has_broken_dbm list.
Signed-off-by: James Morse <james.morse@arm.com>
Link: https://lore.kernel.org/r/20220125154040.549272-3-james.morse@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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coresight: trbe: Workaround Cortex-A510 erratas
This pull request is providing arm64 definitions to support
TRBE Cortex-A510 erratas.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
* tag 'trbe-cortex-a510-errata' of gitolite.kernel.org:pub/scm/linux/kernel/git/coresight/linux:
arm64: errata: Add detection for TRBE trace data corruption
arm64: errata: Add detection for TRBE invalid prohibited states
arm64: errata: Add detection for TRBE ignored system register writes
arm64: Add Cortex-A510 CPU part definition
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KVM/arm64 fixes for 5.17, take #1
- Correctly update the shadow register on exception injection when
running in nVHE mode
- Correctly use the mm_ops indirection when performing cache invalidation
from the page-table walker
- Restrict the vgic-v3 workaround for SEIS to the two known broken
implementations
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Hyper-V TLFS explicitly forbids VMREAD and VMWRITE instructions when
Enlightened VMCS interface is in use:
"Any VMREAD or VMWRITE instructions while an enlightened VMCS is
active is unsupported and can result in unexpected behavior.""
Windows 11 + WSL2 seems to ignore this, attempts to VMREAD VMCS field
0x4404 ("VM-exit interruption information") are observed. Failing
these attempts with nested_vmx_failInvalid() makes such guests
unbootable.
Microsoft confirms this is a Hyper-V bug and claims that it'll get fixed
eventually but for the time being we need a workaround. (Temporary) allow
VMREAD to get data from the currently loaded Enlightened VMCS.
Note: VMWRITE instructions remain forbidden, it is not clear how to
handle them properly and hopefully won't ever be needed.
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220112170134.1904308-6-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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In preparation to allowing reads from Enlightened VMCS from
handle_vmread(), implement evmcs_field_offset() to get the correct
read offset. get_evmcs_offset(), which is being used by KVM-on-Hyper-V,
is almost what's needed but a few things need to be adjusted. First,
WARN_ON() is unacceptable for handle_vmread() as any field can (in
theory) be supplied by the guest and not all fields are defined in
eVMCS v1. Second, we need to handle 'holes' in eVMCS (missing fields).
It also sounds like a good idea to WARN_ON() if such fields are ever
accessed by KVM-on-Hyper-V.
Implement dedicated evmcs_field_offset() helper.
No functional change intended.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220112170134.1904308-5-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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vmcs_to_field_offset{,_table} may sound misleading as VMCS is an opaque
blob which is not supposed to be accessed directly. In fact,
vmcs_to_field_offset{,_table} are related to KVM defined VMCS12 structure.
Rename vmcs_field_to_offset() to get_vmcs12_field_offset() for clarity.
No functional change intended.
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220112170134.1904308-4-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Enlightened VMCS v1 doesn't have VMX_PREEMPTION_TIMER_VALUE field,
PIN_BASED_VMX_PREEMPTION_TIMER is also filtered out already so it makes
sense to filter out VM_EXIT_SAVE_VMX_PREEMPTION_TIMER too.
Note, none of the currently existing Windows/Hyper-V versions are known
to enable 'save VMX-preemption timer value' when eVMCS is in use, the
change is aimed at making the filtering future proof.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220112170134.1904308-3-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Similar to MSR_IA32_VMX_EXIT_CTLS/MSR_IA32_VMX_TRUE_EXIT_CTLS,
MSR_IA32_VMX_ENTRY_CTLS/MSR_IA32_VMX_TRUE_ENTRY_CTLS pair,
MSR_IA32_VMX_TRUE_PINBASED_CTLS needs to be filtered the same way
MSR_IA32_VMX_PINBASED_CTLS is currently filtered as guests may solely rely
on 'true' MSR data.
Note, none of the currently existing Windows/Hyper-V versions are known
to stumble upon the unfiltered MSR_IA32_VMX_TRUE_PINBASED_CTLS, the change
is aimed at making the filtering future proof.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220112170134.1904308-2-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Because KVM_GET_SUPPORTED_CPUID is meant to be passed (by simple-minded
VMMs) to KVM_SET_CPUID2, it cannot include any dynamic xsave states that
have not been enabled. Probing those, for example so that they can be
passed to ARCH_REQ_XCOMP_GUEST_PERM, requires a new ioctl or arch_prctl.
The latter is in fact worse, even though that is what the rest of the
API uses, because it would require supported_xcr0 to be moved from the
KVM module to the kernel just for this use. In addition, the value
would be nonsensical (or an error would have to be returned) until
the KVM module is loaded in.
Therefore, to limit the growth of system ioctls, add a /dev/kvm
variant of KVM_{GET,HAS}_DEVICE_ATTR, and implement it in x86
with just one group (0) and attribute (KVM_X86_XCOMP_GUEST_SUPP).
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Add a helper to handle converting the u64 userspace address embedded in
struct kvm_device_attr into a userspace pointer, it's all too easy to
forget the intermediate "unsigned long" cast as well as the truncation
check.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Tobias Waldekranz
Michal Suchanek
Sachin Sant
Fabiano Rosas
Al Viro
Kevin Bracey
Nathan Huckleberry
Linus Torvalds
Krzysztof Kozlowski
Jakob Unterwurzacher
Peter Geis
Kuniyuki Iwashima
Randy Dunlap
Arnd Bergmann
Robert Hancock
Michael Riesch
Aswani Reddy
Alexander Stein
Martin Kepplinger
Rob Herring
Dario Binacchi
Michael Walle
James Morse
Catalin Marinas
Paolo Bonzini
Vitaly Kuznetsov
Sean Christopherson