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Pull kvm fixes from Paolo Bonzini:
"RISC-V:
- Fix VM hang in case of timer delta being zero
ARM:
- MMU fixes:
- Read the MMU notifier seq before dropping the mmap lock to guard
against reading a potentially stale VMA
- Disable interrupts when walking user page tables to protect
against the page table being freed
- Read the MTE permissions for the VMA within the mmap lock
critical section, avoiding the use of a potentally stale VMA
pointer
- vPMU fixes:
- Return the sum of the current perf event value and PMC snapshot
for reads from userspace
- Don't save the value of guest writes to PMCR_EL0.{C,P}, which
could otherwise lead to userspace erroneously resetting the vPMU
during VM save/restore"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
riscv/kvm: Fix VM hang in case of timer delta being zero.
KVM: arm64: Check for kvm_vma_mte_allowed in the critical section
KVM: arm64: Disable interrupts while walking userspace PTs
KVM: arm64: Retry fault if vma_lookup() results become invalid
KVM: arm64: PMU: Don't save PMCR_EL0.{C,P} for the vCPU
KVM: arm64: PMU: Fix GET_ONE_REG for vPMC regs to return the current value
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HEAD
KVM/riscv fixes for 6.3, take #1
- Fix VM hang in case of timer delta being zero
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git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 fixes for 6.3, part #2
Fixes for a rather interesting set of bugs relating to the MMU:
- Read the MMU notifier seq before dropping the mmap lock to guard
against reading a potentially stale VMA
- Disable interrupts when walking user page tables to protect against
the page table being freed
- Read the MTE permissions for the VMA within the mmap lock critical
section, avoiding the use of a potentally stale VMA pointer
Additionally, some fixes targeting the vPMU:
- Return the sum of the current perf event value and PMC snapshot for
reads from userspace
- Don't save the value of guest writes to PMCR_EL0.{C,P}, which could
otherwise lead to userspace erroneously resetting the vPMU during VM
save/restore
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fix from Borislav Petkov:
- Properly clear perf event status tracking in the AMD perf event
overflow handler
* tag 'perf_urgent_for_v6.3_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/amd/core: Always clear status for idx
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
- Add a AMX ptrace self test
- Prevent a false-positive warning when retrieving the (invalid)
address of dynamic FPU features in their init state which are not
saved in init_fpstate at all
- Randomize per-CPU entry areas only when KASLR is enabled
* tag 'x86_urgent_for_v6.3_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
selftests/x86/amx: Add a ptrace test
x86/fpu/xstate: Prevent false-positive warning in __copy_xstate_uabi_buf()
x86/mm: Do not shuffle CPU entry areas without KASLR
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"21 hotfixes, 8 of which are cc:stable. 11 are for MM, the remainder
are for other subsystems"
* tag 'mm-hotfixes-stable-2023-03-24-17-09' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (21 commits)
mm: mmap: remove newline at the end of the trace
mailmap: add entries for Richard Leitner
kcsan: avoid passing -g for test
kfence: avoid passing -g for test
mm: kfence: fix using kfence_metadata without initialization in show_object()
lib: dhry: fix unstable smp_processor_id(_) usage
mailmap: add entry for Enric Balletbo i Serra
mailmap: map Sai Prakash Ranjan's old address to his current one
mailmap: map Rajendra Nayak's old address to his current one
Revert "kasan: drop skip_kasan_poison variable in free_pages_prepare"
mailmap: add entry for Tobias Klauser
kasan, powerpc: don't rename memintrinsics if compiler adds prefixes
mm/ksm: fix race with VMA iteration and mm_struct teardown
kselftest: vm: fix unused variable warning
mm: fix error handling for map_deny_write_exec
mm: deduplicate error handling for map_deny_write_exec
checksyscalls: ignore fstat to silence build warning on LoongArch
nilfs2: fix kernel-infoleak in nilfs_ioctl_wrap_copy()
test_maple_tree: add more testing for mas_empty_area()
maple_tree: fix mas_skip_node() end slot detection
...
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC fixes from Arnd Bergmann:
"As usual, most of the bug fixes address issues in the devicetree
files, and out of these, most are for the Qualcomm and NXP platforms,
including:
- A missing 'reserved-memory' property on LG G Watch R that is needed
to prevent clashing with firmware
- Annotations for cache coherency on multiple machines
- Corrections for pinctrl, regulator, clock, iommu and power domain
properties for i.MX and Qualcomm to correctly reflect the hardware
settings
- Firmware file names on multiple machines SA8540P Ride board
- An incompatible change to the qcom vadc driver requires adding
individual labels
- Fix EQoS PHY reset GPIO by dropping the deprecated/wrong property
and switch to the new bindings.
- A fix for PCI bus address translation Tegra194 and Tegra234.
There are also a couple of device driver fixes, addressing:
- A race condition in the amdtee driver
- A performance regression in the Qualcomm 'llcc' driver
- An unitialized variable use NXP i.MX 'weim' driver
- Error handling issues in Qualcomm 'rmtfs', and 'scm' drivers and
the Arm scmi firmware driver"
* tag 'arm-fixes-6.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (48 commits)
arm64: dts: qcom: sc8280xp-x13s: mark bob regulator as always-on
arm64: dts: qcom: sc8280xp-x13s: mark s12b regulator as always-on
arm64: dts: qcom: sc8280xp-x13s: mark s10b regulator as always-on
arm64: dts: qcom: sc8280xp-x13s: mark s11b regulator as always-on
arm64: dts: imx93: add missing #address-cells and #size-cells to i2c nodes
bus: imx-weim: fix branch condition evaluates to a garbage value
arm64: dts: imx8mn: specify #sound-dai-cells for SAI nodes
ARM: dts: imx6sl: tolino-shine2hd: fix usbotg1 pinctrl
ARM: dts: imx6sll: e60k02: fix usbotg1 pinctrl
ARM: dts: imx6sll: e70k02: fix usbotg1 pinctrl
arm64: dts: imx93: Fix eqos properties
arm64: dts: imx8mp: Fix LCDIF2 node clock order
arm64: dts: imx8mm-nitrogen-r2: fix WM8960 clock name
arm64: dts: imx8dxl-evk: Fix eqos phy reset gpio
firmware: qcom: scm: fix bogus irq error at probe
arm64: dts: qcom: sm8550: Mark UFS controller as cache coherent
arm64: dts: qcom: sa8540p-ride: correct name of remoteproc_nsp0 firmware
arm64: dts: qcom: sm8450: Mark UFS controller as cache coherent
arm64: dts: qcom: sm8350: Mark UFS controller as cache coherent
arm64: dts: qcom: sm8550: fix LPASS pinctrl slew base address
...
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git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi
Pull EFI fixes from Ard Biesheuvel:
- Set the NX compat flag for arm64 and zboot, to ensure compatibility
with EFI firmware that complies with tightening requirements imposed
across the ecosystem.
- Improve identification of Ampere Altra systems based on SMBIOS data.
- Fix some issues related to the EFI framebuffer that were introduced
as a result from some refactoring related to zboot and the merge with
sysfb.
- Makefile tweak to avoid rebuilding vmlinuz unnecessarily.
- Fix efi_random_alloc() return value on out of memory condition.
* tag 'efi-fixes-for-v6.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
efi/libstub: randomalloc: Return EFI_OUT_OF_RESOURCES on failure
efi/libstub: Use relocated version of kernel's struct screen_info
efi/libstub: zboot: Add compressed image to make targets
efi: sysfb_efi: Add quirk for Lenovo Yoga Book X91F/L
efi: sysfb_efi: Fix DMI quirks not working for simpledrm
efi/libstub: smbios: Drop unused 'recsize' parameter
arm64: efi: Use SMBIOS processor version to key off Ampere quirk
efi/libstub: smbios: Use length member instead of record struct size
efi: earlycon: Reprobe after parsing config tables
arm64: efi: Set NX compat flag in PE/COFF header
efi/libstub: arm64: Remap relocated image with strict permissions
efi/libstub: zboot: Mark zboot EFI application as NX compatible
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https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into soc/fixes
Qualcomm ARM32 Devicetree fixes for v6.3
This introduces missing reserved-memory ranges on LG G Watch R,
resolving stability issues caused by Linux reusing memory used by
firmware.
* tag 'qcom-dts-fixes-for-6.3' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux:
ARM: dts: qcom: apq8026-lg-lenok: add missing reserved memory
Link: https://lore.kernel.org/r/20230323141922.1085875-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into soc/fixes
Qualcomm ARM64 Devicetree fixes for v6.3
This correct SIM card selection on the two newly introduced
MSM8916-based USB modems.
The firmware-name for the first CDSP is corrected on the SA8540P Ride
board.
The PCIe controller in SC7280 is marked cache-coherent, which resolves
seen data corruption issues.
Labels are added to the vadc channel nodes on SC8280XP, as the Linux
driver was updated to not include the unit address when generating
device names and collisions thereby prevented registration of the
channels. Audio clocks and routing is corrected and a few regulators are
marked always-on for the Lenovo Thinkpad X13s, as their clients are not
fully described at this point.
SPI5 was accidentally enabled by default on SM6115, and is disabled
again.
CDSP on SM6375 is provided its power-domains, to appropriately vote for
during power up for the DSP.
The iommu mask for the PCIe controllers in SM8150 is updated, to match
what the hypervisor expects.
Th Venus firmware path is corrected on Xiaomi Mi Pad 5 Pro.
The UFS controller is marked cache coherent on SM8350 and SM8450.
The clocks for the second WSA macro on SM8450 is corrected, and given
its own clocks.
The bias-pull-up value for I2C pins are corrected on SM8550, to trigger
the selection of the strong pull. CPU compatibles and the base address
of the LPASS TLMM block are corrected.
* tag 'qcom-arm64-fixes-for-6.3' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux: (23 commits)
arm64: dts: qcom: sc8280xp-x13s: mark bob regulator as always-on
arm64: dts: qcom: sc8280xp-x13s: mark s12b regulator as always-on
arm64: dts: qcom: sc8280xp-x13s: mark s10b regulator as always-on
arm64: dts: qcom: sc8280xp-x13s: mark s11b regulator as always-on
arm64: dts: qcom: sm8550: Mark UFS controller as cache coherent
arm64: dts: qcom: sa8540p-ride: correct name of remoteproc_nsp0 firmware
arm64: dts: qcom: sm8450: Mark UFS controller as cache coherent
arm64: dts: qcom: sm8350: Mark UFS controller as cache coherent
arm64: dts: qcom: sm8550: fix LPASS pinctrl slew base address
arm64: dts: qcom: sc8280xp-x13s: fix va dmic dai links and routing
arm64: dts: qcom: sc8280xp-x13s: fix dmic sample rate
arm64: dts: qcom: sc8280xp: fix lpass tx macro clocks
arm64: dts: qcom: sc8280xp: fix rx frame shapping info
arm64: dts: qcom: sm8450: correct WSA2 assigned clocks
arm64: dts: qcom: sc7280: Mark PCIe controller as cache coherent
arm64: dts: qcom: msm8916-ufi: Fix sim card selection pinctrl
arm64: dts: qcom: sm8250-xiaomi-elish: Correct venus firmware path
arm64: dts: qcom: sm8550: Use correct CPU compatibles
arm64: dts: qcom: sm8550: Add bias pull up value to tlmm i2c data clk states
arm64: dts: qcom: sm6375: Add missing power-domain-named to CDSP
...
Link: https://lore.kernel.org/r/20230323141642.1085684-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
- A fix to match the CSR ASID masking rules when passing ASIDs to
firmware
- Force GCC to use ISA 2.2, to avoid a host of compatibily issues
between toolchains
* tag 'riscv-for-linus-6.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: Handle zicsr/zifencei issues between clang and binutils
riscv: mm: Fix incorrect ASID argument when flushing TLB
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
- fix build warning
- avoid concurrent accesses to the Xen PV console ring page
* tag 'for-linus-6.3-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
x86/PVH: avoid 32-bit build warning when obtaining VGA console info
hvc/xen: prevent concurrent accesses to the shared ring
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With appropriate compiler support [1], KASAN builds use __asan prefixed
meminstrinsics, and KASAN no longer overrides memcpy/memset/memmove.
If compiler support is detected (CC_HAS_KASAN_MEMINTRINSIC_PREFIX), define
memintrinsics normally (do not prefix '__').
On powerpc, KASAN is the only user of __mem functions, which are used to
define instrumented memintrinsics. Alias the normal versions for KASAN to
use in its implementation.
Link: https://lore.kernel.org/all/20230224085942.1791837-1-elver@google.com/ [1]
Link: https://lore.kernel.org/oe-kbuild-all/202302271348.U5lvmo0S-lkp@intel.com/
Link: https://lkml.kernel.org/r/20230227094726.3833247-1-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc]
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Daniel Axtens <dja@axtens.net>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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There are two related issues that appear in certain combinations with
clang and GNU binutils.
The first occurs when a version of clang that supports zicsr or zifencei
via '-march=' [1] (i.e, >= 17.x) is used in combination with a version
of GNU binutils that do not recognize zicsr and zifencei in the
'-march=' value (i.e., < 2.36):
riscv64-linux-gnu-ld: -march=rv64i2p0_m2p0_a2p0_c2p0_zicsr2p0_zifencei2p0: Invalid or unknown z ISA extension: 'zifencei'
riscv64-linux-gnu-ld: failed to merge target specific data of file fs/efivarfs/file.o
riscv64-linux-gnu-ld: -march=rv64i2p0_m2p0_a2p0_c2p0_zicsr2p0_zifencei2p0: Invalid or unknown z ISA extension: 'zifencei'
riscv64-linux-gnu-ld: failed to merge target specific data of file fs/efivarfs/super.o
The second occurs when a version of clang that does not support zicsr or
zifencei via '-march=' (i.e., <= 16.x) is used in combination with a
version of GNU as that defaults to a newer ISA base spec, which requires
specifying zicsr and zifencei in the '-march=' value explicitly (i.e, >=
2.38):
../arch/riscv/kernel/kexec_relocate.S: Assembler messages:
../arch/riscv/kernel/kexec_relocate.S:147: Error: unrecognized opcode `fence.i', extension `zifencei' required
clang-12: error: assembler command failed with exit code 1 (use -v to see invocation)
This is the same issue addressed by commit 6df2a016c0c8 ("riscv: fix
build with binutils 2.38") (see [2] for additional information) but
older versions of clang miss out on it because the cc-option check
fails:
clang-12: error: invalid arch name 'rv64imac_zicsr_zifencei', unsupported standard user-level extension 'zicsr'
clang-12: error: invalid arch name 'rv64imac_zicsr_zifencei', unsupported standard user-level extension 'zicsr'
To resolve the first issue, only attempt to add zicsr and zifencei to
the march string when using the GNU assembler 2.38 or newer, which is
when the default ISA spec was updated, requiring these extensions to be
specified explicitly. LLVM implements an older version of the base
specification for all currently released versions, so these instructions
are available as part of the 'i' extension. If LLVM's implementation is
updated in the future, a CONFIG_AS_IS_LLVM condition can be added to
CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI.
To resolve the second issue, use version 2.2 of the base ISA spec when
using an older version of clang that does not support zicsr or zifencei
via '-march=', as that is the spec version most compatible with the one
clang/LLVM implements and avoids the need to specify zicsr and zifencei
explicitly due to still being a part of 'i'.
[1]: https://github.com/llvm/llvm-project/commit/22e199e6afb1263c943c0c0d4498694e15bf8a16
[2]: https://lore.kernel.org/ZAxT7T9Xy1Fo3d5W@aurel32.net/
Cc: stable@vger.kernel.org
Link: https://github.com/ClangBuiltLinux/linux/issues/1808
Co-developed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230313-riscv-zicsr-zifencei-fiasco-v1-1-dd1b7840a551@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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Pull ARM fix from Russell King:
"Just one fix for now to eliminate a KASAN false positive"
* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: 9290/1: uaccess: Fix KASAN false-positives
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__copy_xstate_to_uabi_buf() copies either from the tasks XSAVE buffer
or from init_fpstate into the ptrace buffer. Dynamic features, like
XTILEDATA, have an all zeroes init state and are not saved in
init_fpstate, which means the corresponding bit is not set in the
xfeatures bitmap of the init_fpstate header.
But __copy_xstate_to_uabi_buf() retrieves addresses for both the tasks
xstate and init_fpstate unconditionally via __raw_xsave_addr().
So if the tasks XSAVE buffer has a dynamic feature set, then the
address retrieval for init_fpstate triggers the warning in
__raw_xsave_addr() which checks the feature bit in the init_fpstate
header.
Remove the address retrieval from init_fpstate for extended features.
They have an all zeroes init state so init_fpstate has zeros for them.
Then zeroing the user buffer for the init state is the same as copying
them from init_fpstate.
Fixes: 2308ee57d93d ("x86/fpu/amx: Enable the AMX feature in 64-bit mode")
Reported-by: Mingwei Zhang <mizhang@google.com>
Link: https://lore.kernel.org/kvm/20230221163655.920289-2-mizhang@google.com/
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Tested-by: Mingwei Zhang <mizhang@google.com>
Link: https://lore.kernel.org/all/20230227210504.18520-2-chang.seok.bae%40intel.com
Cc: stable@vger.kernel.org
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The commit 97e3d26b5e5f ("x86/mm: Randomize per-cpu entry area") fixed
an omission of KASLR on CPU entry areas. It doesn't take into account
KASLR switches though, which may result in unintended non-determinism
when a user wants to avoid it (e.g. debugging, benchmarking).
Generate only a single combination of CPU entry areas offsets -- the
linear array that existed prior randomization when KASLR is turned off.
Since we have 3f148f331814 ("x86/kasan: Map shadow for percpu pages on
demand") and followups, we can use the more relaxed guard
kasrl_enabled() (in contrast to kaslr_memory_enabled()).
Fixes: 97e3d26b5e5f ("x86/mm: Randomize per-cpu entry area")
Signed-off-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20230306193144.24605-1-mkoutny%40suse.com
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In the commit referenced below I failed to pay attention to this code
also being buildable as 32-bit. Adjust the type of "ret" - there's no
real need for it to be wider than 32 bits.
Fixes: 934ef33ee75c ("x86/PVH: obtain VGA console info in Dom0")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/2d2193ff-670b-0a27-e12d-2c5c4c121c79@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
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The bob supply is used by several pmic regulators and components which
are not (yet fully) described in the devicetree.
Mark the regulator as always-on for now.
Fixes: f29077d86652 ("arm64: dts: qcom: sc8280xp-x13s: Add soundcard support")
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230322113318.17908-5-johan+linaro@kernel.org
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The s12b supply is used by several pmic regulators as well as the
wlan/bluetooth radio which are not yet fully described in the
devicetree.
Mark the regulator as always-on for now.
Fixes: f29077d86652 ("arm64: dts: qcom: sc8280xp-x13s: Add soundcard support")
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230322113318.17908-4-johan+linaro@kernel.org
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The s10b supply is used by several components that are not (yet)
described in devicetree (e.g. ram, charger, ec) and must not be
disabled.
Mark the regulator as always-on.
Fixes: f29077d86652 ("arm64: dts: qcom: sc8280xp-x13s: Add soundcard support")
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230322113318.17908-3-johan+linaro@kernel.org
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The s11b supply is used by the wlan module (as well as some of the
pmics) which are not yet fully described in the devicetree.
Mark the regulator as always-on for now.
Fixes: 123b30a75623 ("arm64: dts: qcom: sc8280xp-x13s: enable WiFi controller")
Cc: stable@vger.kernel.org # 6.2
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230322113318.17908-2-johan+linaro@kernel.org
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Currently, we pass the CONTEXTID instead of the ASID to the TLB flush
function. We should only take the ASID field to prevent from touching
the reserved bit field.
Fixes: 3f1e782998cd ("riscv: add ASID-based tlbflushing methods")
Signed-off-by: Dylan Jhong <dylan@andestech.com>
Reviewed-by: Sergey Matyukevich <sergey.matyukevich@syntacore.com>
Link: https://lore.kernel.org/r/20230313034906.2401730-1-dylan@andestech.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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The variable 'status' (which contains the unhandled overflow bits) is
not being properly masked in some cases, displaying the following
warning:
WARNING: CPU: 156 PID: 475601 at arch/x86/events/amd/core.c:972 amd_pmu_v2_handle_irq+0x216/0x270
This seems to be happening because the loop is being continued before
the status bit being unset, in case x86_perf_event_set_period()
returns 0. This is also causing an inconsistency because the "handled"
counter is incremented, but the status bit is not cleaned.
Move the bit cleaning together above, together when the "handled"
counter is incremented.
Fixes: 7685665c390d ("perf/x86/amd/core: Add PerfMonV2 overflow handling")
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Sandipan Das <sandipan.das@amd.com>
Link: https://lore.kernel.org/r/20230321113338.1669660-1-leitao@debian.org
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS fix from Borislav Petkov:
- Flush out logged errors immediately after MCA banks configuration
changes over sysfs have been done instead of waiting until something
else triggers the workqueue later - another error or the polling
interval cycle is reached
* tag 'ras_urgent_for_v6.3_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mce: Make sure logged MCEs are processed after sysfs update
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
"There's a little bit more 'movement' in there for my taste but it
needs to happen and should make the code better after it.
- Check cmdline_find_option()'s return value before further
processing
- Clear temporary storage in the resctrl code to prevent access to an
unexistent MSR
- Add a simple throttling mechanism to protect the hypervisor from
potentially malicious SEV guests issuing requests in rapid
succession.
In order to not jeopardize the sanity of everyone involved in
maintaining this code, the request issuing side has received a
cleanup, split in more or less trivial, small and digestible
pieces. Otherwise, the code was threatening to become an
unmaintainable mess.
Therefore, that cleanup is marked indirectly also for stable so
that there's no differences between the upstream code and the
stable variant when it comes down to backporting more there"
* tag 'x86_urgent_for_v6.3_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Fix use of uninitialized buffer in sme_enable()
x86/resctrl: Clear staged_config[] before and after it is used
virt/coco/sev-guest: Add throttling awareness
virt/coco/sev-guest: Convert the sw_exit_info_2 checking to a switch-case
virt/coco/sev-guest: Do some code style cleanups
virt/coco/sev-guest: Carve out the request issuing logic into a helper
virt/coco/sev-guest: Remove the disable_vmpck label in handle_guest_request()
virt/coco/sev-guest: Simplify extended guest request handling
virt/coco/sev-guest: Check SEV_SNP attribute at probe time
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
- cleanup for xen time handling
- enable the VGA console in a Xen PVH dom0
- cleanup in the xenfs driver
* tag 'for-linus-6.3-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: remove unnecessary (void*) conversions
x86/PVH: obtain VGA console info in Dom0
x86/xen/time: cleanup xen_tsc_safe_clocksource
xen: update arch/x86/include/asm/xen/cpuid.h
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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
- fixes to the ASID allocator to avoid leaking stale mappings between
tasks
- fix the vmalloc fault handler to tolerate huge pages
* tag 'riscv-for-linus-6.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
RISC-V: mm: Support huge page in vmalloc_fault()
riscv: asid: Fixup stale TLB entry cause application crash
Revert "riscv: mm: notify remote harts about mmu cache updates"
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Vasily Gorbik:
- Update defconfigs
- Fix early boot code by adding missing intersection check to prevent
potential overwriting of the ipl report
- Fix a use-after-free issue in s390-specific code related to PCI
resources being retained after hot-unplugging individual functions,
by removing the resources from the PCI bus's resource list and using
the zpci_bar_struct's resource pointer directly
* tag 's390-6.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390: update defconfigs
PCI: s390: Fix use-after-free of PCI resources with per-function hotplug
s390/ipl: add missing intersection check to ipl_report handling
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Fix false detection of read faults, introduced by execute-only
support
- Fix a build failure when GENERIC_ALLOCATOR is not selected
Thanks to Russell Currey, Randy Dunlap, Michal Suchánek, Nathan Lynch,
and Benjamin Gray.
* tag 'powerpc-6.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/mm: Fix false detection of read faults
powerpc/pseries: RTAS work area requires GENERIC_ALLOCATOR
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git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into soc-fixes
i.MX fixes for 6.3:
- A couple of i.MX93 fixes from Alexander Stein to correct EQoS Ethernet
properties.
- Correct clock-names of FlexSPI device in imx8-ss-lsio DT.
- Fix EQoS PHY reset GPIO by dropping the deprecated/wrong property and
switch to the new bindings.
- Fix an issue with imx-weim bus driver that branch condition evaluates
to a garbage value.
- Correct WM8960 clock name for imx8mm-nitrogen-r2 board.
- Fix LCDIF2 clocks for i.MX8MP DT.
- Add missing #sound-dai-cells properties to SAI nodes for i.MX8MN DT.
- Revert LS1028A DT changes of getting MAC addresses from VPD, as the
dependency on NVMEM device is not in place.
- A series from Peng Fan to add missing pinctrl property for i.MX6SL
based devices.
* tag 'imx-fixes-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
arm64: dts: imx93: add missing #address-cells and #size-cells to i2c nodes
bus: imx-weim: fix branch condition evaluates to a garbage value
arm64: dts: imx8mn: specify #sound-dai-cells for SAI nodes
ARM: dts: imx6sl: tolino-shine2hd: fix usbotg1 pinctrl
ARM: dts: imx6sll: e60k02: fix usbotg1 pinctrl
ARM: dts: imx6sll: e70k02: fix usbotg1 pinctrl
arm64: dts: imx93: Fix eqos properties
arm64: dts: imx8mp: Fix LCDIF2 node clock order
arm64: dts: imx8mm-nitrogen-r2: fix WM8960 clock name
arm64: dts: imx8dxl-evk: Fix eqos phy reset gpio
Revert "arm64: dts: ls1028a: sl28: get MAC addresses from VPD"
arm64: dts: freescale: imx8-ss-lsio: Fix flexspi clock order
Link: https://lore.kernel.org/r/20230315132814.GF143566@dragon
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into soc-fixes
arm64: tegra: Device tree fixes for v6.3-rc1
This contains a fix for the CBB bus' ranges property on Tegra194 and
Tegra234 that restores proper translation of PCI addresses.
* tag 'tegra-for-6.3-arm64-dt-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
arm64: tegra: Bump CBB ranges property on Tegra194 and Tegra234
Link: https://lore.kernel.org/r/20230302094213.3874449-1-thierry.reding@gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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In case when VCPU is blocked due to WFI, we schedule the timer
from `kvm_riscv_vcpu_timer_blocking()` to keep timer interrupt
ticking.
But in case when delta_ns comes to be zero, we never schedule
the timer and VCPU keeps sleeping indefinitely until any activity
is done with VM console.
This is easily reproduce-able using kvmtool.
./lkvm-static run -c1 --console virtio -p "earlycon root=/dev/vda" \
-k ./Image -d rootfs.ext4
Also, just add a print in kvm_riscv_vcpu_vstimer_expired() to
check the interrupt delivery and run `top` or similar auto-upating
cmd from guest. Within sometime one can notice that print from
timer expiry routine stops and the `top` cmd output will stop
updating.
This change fixes this by making sure we schedule the timer even
with delta_ns being zero to bring the VCPU out of sleep immediately.
Fixes: 8f5cb44b1bae ("RISC-V: KVM: Support sstc extension")
Signed-off-by: Rajnesh Kanwal <rkanwal@rivosinc.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
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On page fault, we find about the VMA that backs the page fault
early on, and quickly release the mmap_read_lock. However, using
the VMA pointer after the critical section is pretty dangerous,
as a teardown may happen in the meantime and the VMA be long gone.
Move the sampling of the MTE permission early, and NULL-ify the
VMA pointer after that, just to be on the safe side.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230316174546.3777507-3-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
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We walk the userspace PTs to discover what mapping size was
used there. However, this can race against the userspace tables
being freed, and we end-up in the weeds.
Thankfully, the mm code is being generous and will IPI us when
doing so. So let's implement our part of the bargain and disable
interrupts around the walk. This ensures that nothing terrible
happens during that time.
We still need to handle the removal of the page tables before
the walk. For that, allow get_user_mapping_size() to return an
error, and make sure this error can be propagated all the way
to the the exit handler.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230316174546.3777507-2-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
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Pull kvm fixes from Paolo Bonzini:
"ARM64:
- Address a rather annoying bug w.r.t. guest timer offsetting. The
synchronization of timer offsets between vCPUs was broken, leading
to inconsistent timer reads within the VM.
x86:
- New tests for the slow path of the EVTCHNOP_send Xen hypercall
- Add missing nVMX consistency checks for CR0 and CR4
- Fix bug that broke AMD GATag on 512 vCPU machines
Selftests:
- Skip hugetlb tests if huge pages are not available
- Sync KVM exit reasons"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: selftests: Sync KVM exit reasons in selftests
KVM: selftests: Add macro to generate KVM exit reason strings
KVM: selftests: Print expected and actual exit reason in KVM exit reason assert
KVM: selftests: Make vCPU exit reason test assertion common
KVM: selftests: Add EVTCHNOP_send slow path test to xen_shinfo_test
KVM: selftests: Use enum for test numbers in xen_shinfo_test
KVM: selftests: Add helpers to make Xen-style VMCALL/VMMCALL hypercalls
KVM: selftests: Move the guts of kvm_hypercall() to a separate macro
KVM: SVM: WARN if GATag generation drops VM or vCPU ID information
KVM: SVM: Modify AVIC GATag to support max number of 512 vCPUs
KVM: SVM: Fix a benign off-by-one bug in AVIC physical table mask
selftests: KVM: skip hugetlb tests if huge pages are not available
KVM: VMX: Use tabs instead of spaces for indentation
KVM: VMX: Fix indentation coding style issue
KVM: nVMX: remove unnecessary #ifdef
KVM: nVMX: add missing consistency checks for CR0 and CR4
KVM: arm64: timers: Convert per-vcpu virtual offset to a global value
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cmdline_find_option() may fail before doing any initialization of
the buffer array. This may lead to unpredictable results when the same
buffer is used later in calls to strncmp() function. Fix the issue by
returning early if cmdline_find_option() returns an error.
Found by Linux Verification Center (linuxtesting.org) with static
analysis tool SVACE.
Fixes: aca20d546214 ("x86/mm: Add support to make use of Secure Memory Encryption")
Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Cc: <stable@kernel.org>
Link: https://lore.kernel.org/r/20230306160656.14844-1-n.zhandarovich@fintech.ru
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As a temporary storage, staged_config[] in rdt_domain should be cleared
before and after it is used. The stale value in staged_config[] could
cause an MSR access error.
Here is a reproducer on a system with 16 usable CLOSIDs for a 15-way L3
Cache (MBA should be disabled if the number of CLOSIDs for MB is less than
16.) :
mount -t resctrl resctrl -o cdp /sys/fs/resctrl
mkdir /sys/fs/resctrl/p{1..7}
umount /sys/fs/resctrl/
mount -t resctrl resctrl /sys/fs/resctrl
mkdir /sys/fs/resctrl/p{1..8}
An error occurs when creating resource group named p8:
unchecked MSR access error: WRMSR to 0xca0 (tried to write 0x00000000000007ff) at rIP: 0xffffffff82249142 (cat_wrmsr+0x32/0x60)
Call Trace:
<IRQ>
__flush_smp_call_function_queue+0x11d/0x170
__sysvec_call_function+0x24/0xd0
sysvec_call_function+0x89/0xc0
</IRQ>
<TASK>
asm_sysvec_call_function+0x16/0x20
When creating a new resource control group, hardware will be configured
by the following process:
rdtgroup_mkdir()
rdtgroup_mkdir_ctrl_mon()
rdtgroup_init_alloc()
resctrl_arch_update_domains()
resctrl_arch_update_domains() iterates and updates all resctrl_conf_type
whose have_new_ctrl is true. Since staged_config[] holds the same values as
when CDP was enabled, it will continue to update the CDP_CODE and CDP_DATA
configurations. When group p8 is created, get_config_index() called in
resctrl_arch_update_domains() will return 16 and 17 as the CLOSIDs for
CDP_CODE and CDP_DATA, which will be translated to an invalid register -
0xca0 in this scenario.
Fix it by clearing staged_config[] before and after it is used.
[reinette: re-order commit tags]
Fixes: 75408e43509e ("x86/resctrl: Allow different CODE/DATA configurations to be staged")
Suggested-by: Xin Hao <xhao@linux.alibaba.com>
Signed-off-by: Shawn Wang <shawnwang@linux.alibaba.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Tested-by: Reinette Chatre <reinette.chatre@intel.com>
Cc:stable@vger.kernel.org
Link: https://lore.kernel.org/all/2fad13f49fbe89687fc40e9a5a61f23a28d1507a.1673988935.git.reinette.chatre%40intel.com
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To support detection of read faults with Radix execute-only memory, the
vma_is_accessible() check in access_error() (which checks for PROT_NONE)
was replaced with a check to see if VM_READ was missing, and if so,
returns true to assert the fault was caused by a bad read.
This is incorrect, as it ignores that both VM_WRITE and VM_EXEC imply
read on powerpc, as defined in protection_map[]. This causes mappings
containing VM_WRITE or VM_EXEC without VM_READ to misreport the cause of
page faults, since the MMU is still allowing reads.
Correct this by restoring the original vma_is_accessible() check for
PROT_NONE mappings, and adding a separate check for Radix PROT_EXEC-only
mappings.
Fixes: 395cac7752b9 ("powerpc/mm: Support execute-only memory on the Radix MMU")
Reported-by: Michal Suchánek <msuchanek@suse.de>
Link: https://lore.kernel.org/r/20230308152702.GR19419@kitsune.suse.cz
Tested-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230310050834.63105-1-ruscur@russell.cc
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Since RISC-V supports ioremap() with huge page (pud/pmd) mapping,
However, vmalloc_fault() assumes that the vmalloc range is limited
to pte mappings. To complete the vmalloc_fault() function by adding
huge page support.
Fixes: 310f541a027b ("riscv: Enable HAVE_ARCH_HUGE_VMAP for 64BIT")
Cc: stable@vger.kernel.org
Signed-off-by: Dylan Jhong <dylan@andestech.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20230310075021.3919290-1-dylan@andestech.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull tracing fixes from Steven Rostedt:
- Do not allow histogram values to have modifies. They can cause a NULL
pointer dereference if they do.
- Warn if hist_field_name() is passed a NULL. Prevent the NULL pointer
dereference mentioned above.
- Fix invalid address look up race in lookup_rec()
- Define ftrace_stub_graph conditionally to prevent linker errors
- Always check if RCU is watching at all tracepoint locations
* tag 'trace-v6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
tracing: Make tracepoint lockdep check actually test something
ftrace,kcfi: Define ftrace_stub_graph conditionally
ftrace: Fix invalid address access in lookup_rec() when index is 0
tracing: Check field value in hist_field_name()
tracing: Do not let histogram values have some modifiers
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Read mmu_invalidate_seq before dropping the mmap_lock so that KVM can
detect if the results of vma_lookup() (e.g. vma_shift) become stale
before it acquires kvm->mmu_lock. This fixes a theoretical bug where a
VMA could be changed by userspace after vma_lookup() and before KVM
reads the mmu_invalidate_seq, causing KVM to install page table entries
based on a (possibly) no-longer-valid vma_shift.
Re-order the MMU cache top-up to earlier in user_mem_abort() so that it
is not done after KVM has read mmu_invalidate_seq (i.e. so as to avoid
inducing spurious fault retries).
This bug has existed since KVM/ARM's inception. It's unlikely that any
sane userspace currently modifies VMAs in such a way as to trigger this
race. And even with directed testing I was unable to reproduce it. But a
sufficiently motivated host userspace might be able to exploit this
race.
Fixes: 94f8e6418d39 ("KVM: ARM: Handle guest faults in KVM")
Cc: stable@vger.kernel.org
Reported-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230313235454.2964067-1-dmatlack@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
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A new platform-op was added to Xen to allow obtaining the same VGA
console information PV Dom0 is handed. Invoke the new function and have
the output data processed by xen_init_vga().
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/8f315e92-7bda-c124-71cc-478ab9c5e610@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
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WARN if generating a GATag given a VM ID and vCPU ID doesn't yield the
same IDs when pulling the IDs back out of the tag. Don't bother adding
error handling to callers, this is very much a paranoid sanity check as
KVM fully controls the VM ID and is supposed to reject too-big vCPU IDs.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Tested-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Message-Id: <20230207002156.521736-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Define AVIC_VCPU_ID_MASK based on AVIC_PHYSICAL_MAX_INDEX, i.e. the mask
that effectively controls the largest guest physical APIC ID supported by
x2AVIC, instead of hardcoding the number of bits to 8 (and the number of
VM bits to 24).
The AVIC GATag is programmed into the AMD IOMMU IRTE to provide a
reference back to KVM in case the IOMMU cannot inject an interrupt into a
non-running vCPU. In such a case, the IOMMU notifies software by creating
a GALog entry with the corresponded GATag, and KVM then uses the GATag to
find the correct VM+vCPU to kick. Dropping bit 8 from the GATag results
in kicking the wrong vCPU when targeting vCPUs with x2APIC ID > 255.
Fixes: 4d1d7942e36a ("KVM: SVM: Introduce logic to (de)activate x2AVIC mode")
Cc: stable@vger.kernel.org
Reported-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Co-developed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Tested-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Message-Id: <20230207002156.521736-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Define the "physical table max index mask" as bits 8:0, not 9:0. x2AVIC
currently supports a max of 512 entries, i.e. the max index is 511, and
the inputs to GENMASK_ULL() are inclusive. The bug is benign as bit 9 is
reserved and never set by KVM, i.e. KVM is just clearing bits that are
guaranteed to be zero.
Note, as of this writing, APM "Rev. 3.39-October 2022" incorrectly states
that bits 11:8 are reserved in Table B-1. VMCB Layout, Control Area. I.e.
that table wasn't updated when x2AVIC support was added.
Opportunistically fix the comment for the max AVIC ID to align with the
code, and clean up comment formatting too.
Fixes: 4d1d7942e36a ("KVM: SVM: Introduce logic to (de)activate x2AVIC mode")
Cc: stable@vger.kernel.org
Cc: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Tested-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Message-Id: <20230207002156.521736-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Code indentation should use tabs where possible and miss a '*'.
Signed-off-by: Rong Tao <rongtao@cestc.cn>
Message-Id: <tencent_A492CB3F9592578451154442830EA1B02C07@qq.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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|
Code indentation should use tabs where possible.
Signed-off-by: Rong Tao <rongtao@cestc.cn>
Message-Id: <tencent_31E6ACADCB6915E157CF5113C41803212107@qq.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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nested_vmx_check_controls() has already run by the time KVM checks host state,
so the "host address space size" exit control can only be set on x86-64 hosts.
Simplify the condition at the cost of adding some dead code to 32-bit kernels.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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The effective values of the guest CR0 and CR4 registers may differ from
those included in the VMCS12. In particular, disabling EPT forces
CR4.PAE=1 and disabling unrestricted guest mode forces CR0.PG=CR0.PE=1.
Therefore, checks on these bits cannot be delegated to the processor
and must be performed by KVM.
Reported-by: Reima ISHII <ishiir@g.ecc.u-tokyo.ac.jp>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
|
