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Enable DIAG and IPC bridge driver on msm8996 auto to support
interfacing with DIAG and QMI interfaces.
Change-Id: I8b32bdfc6aa29c090b21512e202c2822b9752a48
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>
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Enable MSM hardware random generator in LA-GVM.
Change-Id: I970986fd302dfc56544409682faa97c9e0a508bd
Signed-off-by: Venkata Rao Kakani <vkakani@codeaurora.org>
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Enable ssusb passthrough functionality in la-gvm
Change-Id: I9652cc2e4d2bdf9e0b2027abf0cce84eb77e049e
Signed-off-by: Venkata Rao Kakani <vkakani@codeaurora.org>
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Add phy clock skew values for the neutrino driver
on msm8996 CV2X boards.
Change-Id: Ic06b054dd6d5e4267fdec64d7d73786b54466444
Signed-off-by: Aditya Mathur <aditmath@codeaurora.org>
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* refs/heads/tmp-7ba5557
Linux 4.4.139
Bluetooth: Fix connection if directed advertising and privacy is used
cdc_ncm: avoid padding beyond end of skb
dm thin: handle running out of data space vs concurrent discard
block: Fix transfer when chunk sectors exceeds max
spi: Fix scatterlist elements size in spi_map_buf
Btrfs: fix unexpected cow in run_delalloc_nocow
ALSA: hda/realtek - Add a quirk for FSC ESPRIMO U9210
Input: elantech - fix V4 report decoding for module with middle key
Input: elantech - enable middle button of touchpads on ThinkPad P52
Input: elan_i2c_smbus - fix more potential stack buffer overflows
udf: Detect incorrect directory size
xen: Remove unnecessary BUG_ON from __unbind_from_irq()
Input: elan_i2c - add ELAN0618 (Lenovo v330 15IKB) ACPI ID
video: uvesafb: Fix integer overflow in allocation
NFSv4: Fix possible 1-byte stack overflow in nfs_idmap_read_and_verify_message
nfsd: restrict rd_maxcount to svc_max_payload in nfsd_encode_readdir
media: dvb_frontend: fix locking issues at dvb_frontend_get_event()
media: cx231xx: Add support for AverMedia DVD EZMaker 7
media: v4l2-compat-ioctl32: prevent go past max size
perf intel-pt: Fix packet decoding of CYC packets
perf intel-pt: Fix "Unexpected indirect branch" error
perf intel-pt: Fix MTC timing after overflow
perf intel-pt: Fix decoding to accept CBR between FUP and corresponding TIP
perf intel-pt: Fix sync_switch INTEL_PT_SS_NOT_TRACING
perf tools: Fix symbol and object code resolution for vdso32 and vdsox32
mfd: intel-lpss: Program REMAP register in PIO mode
backlight: tps65217_bl: Fix Device Tree node lookup
backlight: max8925_bl: Fix Device Tree node lookup
backlight: as3711_bl: Fix Device Tree node lookup
xfrm: skip policies marked as dead while rehashing
xfrm: Ignore socket policies when rebuilding hash tables
UBIFS: Fix potential integer overflow in allocation
ubi: fastmap: Cancel work upon detach
md: fix two problems with setting the "re-add" device state.
linvdimm, pmem: Preserve read-only setting for pmem devices
scsi: zfcp: fix missing REC trigger trace on enqueue without ERP thread
scsi: zfcp: fix missing REC trigger trace for all objects in ERP_FAILED
scsi: zfcp: fix missing REC trigger trace on terminate_rport_io for ERP_FAILED
scsi: zfcp: fix missing REC trigger trace on terminate_rport_io early return
scsi: zfcp: fix misleading REC trigger trace where erp_action setup failed
scsi: zfcp: fix missing SCSI trace for retry of abort / scsi_eh TMF
scsi: zfcp: fix missing SCSI trace for result of eh_host_reset_handler
scsi: qla2xxx: Fix setting lower transfer speed if GPSC fails
iio:buffer: make length types match kfifo types
Btrfs: fix clone vs chattr NODATASUM race
time: Make sure jiffies_to_msecs() preserves non-zero time periods
MIPS: io: Add barrier after register read in inX()
PCI: pciehp: Clear Presence Detect and Data Link Layer Status Changed on resume
MIPS: BCM47XX: Enable 74K Core ExternalSync for PCIe erratum
mtd: cfi_cmdset_0002: Avoid walking all chips when unlocking.
mtd: cfi_cmdset_0002: Fix unlocking requests crossing a chip boudary
mtd: cfi_cmdset_0002: fix SEGV unlocking multiple chips
mtd: cfi_cmdset_0002: Use right chip in do_ppb_xxlock()
mtd: cfi_cmdset_0002: Change write buffer to check correct value
RDMA/mlx4: Discard unknown SQP work requests
IB/qib: Fix DMA api warning with debug kernel
of: unittest: for strings, account for trailing \0 in property length field
ARM: 8764/1: kgdb: fix NUMREGBYTES so that gdb_regs[] is the correct size
powerpc/fadump: Unregister fadump on kexec down path.
cpuidle: powernv: Fix promotion from snooze if next state disabled
powerpc/ptrace: Fix enforcement of DAWR constraints
powerpc/ptrace: Fix setting 512B aligned breakpoints with PTRACE_SET_DEBUGREG
powerpc/mm/hash: Add missing isync prior to kernel stack SLB switch
fuse: fix control dir setup and teardown
fuse: don't keep dead fuse_conn at fuse_fill_super().
fuse: atomic_o_trunc should truncate pagecache
Bluetooth: hci_qca: Avoid missing rampatch failure with userspace fw loader
ipmi:bt: Set the timeout before doing a capabilities check
branch-check: fix long->int truncation when profiling branches
mips: ftrace: fix static function graph tracing
lib/vsprintf: Remove atomic-unsafe support for %pCr
ASoC: cirrus: i2s: Fix {TX|RX}LinCtrlData setup
ASoC: cirrus: i2s: Fix LRCLK configuration
ASoC: dapm: delete dapm_kcontrol_data paths list before freeing it
1wire: family module autoload fails because of upper/lower case mismatch.
usb: do not reset if a low-speed or full-speed device timed out
signal/xtensa: Consistenly use SIGBUS in do_unaligned_user
serial: sh-sci: Use spin_{try}lock_irqsave instead of open coding version
m68k/mm: Adjust VM area to be unmapped by gap size for __iounmap()
x86/spectre_v1: Disable compiler optimizations over array_index_mask_nospec()
fs/binfmt_misc.c: do not allow offset overflow
w1: mxc_w1: Enable clock before calling clk_get_rate() on it
libata: Drop SanDisk SD7UB3Q*G1001 NOLPM quirk
libata: zpodd: small read overflow in eject_tray()
libata: zpodd: make arrays cdb static, reduces object code size
cpufreq: Fix new policy initialization during limits updates via sysfs
ALSA: hda: add dock and led support for HP ProBook 640 G4
ALSA: hda: add dock and led support for HP EliteBook 830 G5
ALSA: hda - Handle kzalloc() failure in snd_hda_attach_pcm_stream()
btrfs: scrub: Don't use inode pages for device replace
driver core: Don't ignore class_dir_create_and_add() failure.
ext4: fix fencepost error in check for inode count overflow during resize
ext4: update mtime in ext4_punch_hole even if no blocks are released
tcp: verify the checksum of the first data segment in a new connection
bonding: re-evaluate force_primary when the primary slave name changes
usb: musb: fix remote wakeup racing with suspend
Btrfs: make raid6 rebuild retry more
tcp: do not overshoot window_clamp in tcp_rcv_space_adjust()
Revert "Btrfs: fix scrub to repair raid6 corruption"
net/sonic: Use dma_mapping_error()
net: qmi_wwan: Add Netgear Aircard 779S
atm: zatm: fix memcmp casting
ipvs: fix buffer overflow with sync daemon and service
netfilter: ebtables: handle string from userspace with care
xfrm6: avoid potential infinite loop in _decode_session6()
ANDROID: Add kconfig to make dm-verity check_at_most_once default enabled
ANDROID: sdcardfs: fix potential crash when reserved_mb is not zero
Change-Id: Ibcd2b6614843e4e8fd5a57acf350a9e83e1c0dbc
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>
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Changes in 4.4.139
xfrm6: avoid potential infinite loop in _decode_session6()
netfilter: ebtables: handle string from userspace with care
ipvs: fix buffer overflow with sync daemon and service
atm: zatm: fix memcmp casting
net: qmi_wwan: Add Netgear Aircard 779S
net/sonic: Use dma_mapping_error()
Revert "Btrfs: fix scrub to repair raid6 corruption"
tcp: do not overshoot window_clamp in tcp_rcv_space_adjust()
Btrfs: make raid6 rebuild retry more
usb: musb: fix remote wakeup racing with suspend
bonding: re-evaluate force_primary when the primary slave name changes
tcp: verify the checksum of the first data segment in a new connection
ext4: update mtime in ext4_punch_hole even if no blocks are released
ext4: fix fencepost error in check for inode count overflow during resize
driver core: Don't ignore class_dir_create_and_add() failure.
btrfs: scrub: Don't use inode pages for device replace
ALSA: hda - Handle kzalloc() failure in snd_hda_attach_pcm_stream()
ALSA: hda: add dock and led support for HP EliteBook 830 G5
ALSA: hda: add dock and led support for HP ProBook 640 G4
cpufreq: Fix new policy initialization during limits updates via sysfs
libata: zpodd: make arrays cdb static, reduces object code size
libata: zpodd: small read overflow in eject_tray()
libata: Drop SanDisk SD7UB3Q*G1001 NOLPM quirk
w1: mxc_w1: Enable clock before calling clk_get_rate() on it
fs/binfmt_misc.c: do not allow offset overflow
x86/spectre_v1: Disable compiler optimizations over array_index_mask_nospec()
m68k/mm: Adjust VM area to be unmapped by gap size for __iounmap()
serial: sh-sci: Use spin_{try}lock_irqsave instead of open coding version
signal/xtensa: Consistenly use SIGBUS in do_unaligned_user
usb: do not reset if a low-speed or full-speed device timed out
1wire: family module autoload fails because of upper/lower case mismatch.
ASoC: dapm: delete dapm_kcontrol_data paths list before freeing it
ASoC: cirrus: i2s: Fix LRCLK configuration
ASoC: cirrus: i2s: Fix {TX|RX}LinCtrlData setup
lib/vsprintf: Remove atomic-unsafe support for %pCr
mips: ftrace: fix static function graph tracing
branch-check: fix long->int truncation when profiling branches
ipmi:bt: Set the timeout before doing a capabilities check
Bluetooth: hci_qca: Avoid missing rampatch failure with userspace fw loader
fuse: atomic_o_trunc should truncate pagecache
fuse: don't keep dead fuse_conn at fuse_fill_super().
fuse: fix control dir setup and teardown
powerpc/mm/hash: Add missing isync prior to kernel stack SLB switch
powerpc/ptrace: Fix setting 512B aligned breakpoints with PTRACE_SET_DEBUGREG
powerpc/ptrace: Fix enforcement of DAWR constraints
cpuidle: powernv: Fix promotion from snooze if next state disabled
powerpc/fadump: Unregister fadump on kexec down path.
ARM: 8764/1: kgdb: fix NUMREGBYTES so that gdb_regs[] is the correct size
of: unittest: for strings, account for trailing \0 in property length field
IB/qib: Fix DMA api warning with debug kernel
RDMA/mlx4: Discard unknown SQP work requests
mtd: cfi_cmdset_0002: Change write buffer to check correct value
mtd: cfi_cmdset_0002: Use right chip in do_ppb_xxlock()
mtd: cfi_cmdset_0002: fix SEGV unlocking multiple chips
mtd: cfi_cmdset_0002: Fix unlocking requests crossing a chip boudary
mtd: cfi_cmdset_0002: Avoid walking all chips when unlocking.
MIPS: BCM47XX: Enable 74K Core ExternalSync for PCIe erratum
PCI: pciehp: Clear Presence Detect and Data Link Layer Status Changed on resume
MIPS: io: Add barrier after register read in inX()
time: Make sure jiffies_to_msecs() preserves non-zero time periods
Btrfs: fix clone vs chattr NODATASUM race
iio:buffer: make length types match kfifo types
scsi: qla2xxx: Fix setting lower transfer speed if GPSC fails
scsi: zfcp: fix missing SCSI trace for result of eh_host_reset_handler
scsi: zfcp: fix missing SCSI trace for retry of abort / scsi_eh TMF
scsi: zfcp: fix misleading REC trigger trace where erp_action setup failed
scsi: zfcp: fix missing REC trigger trace on terminate_rport_io early return
scsi: zfcp: fix missing REC trigger trace on terminate_rport_io for ERP_FAILED
scsi: zfcp: fix missing REC trigger trace for all objects in ERP_FAILED
scsi: zfcp: fix missing REC trigger trace on enqueue without ERP thread
linvdimm, pmem: Preserve read-only setting for pmem devices
md: fix two problems with setting the "re-add" device state.
ubi: fastmap: Cancel work upon detach
UBIFS: Fix potential integer overflow in allocation
xfrm: Ignore socket policies when rebuilding hash tables
xfrm: skip policies marked as dead while rehashing
backlight: as3711_bl: Fix Device Tree node lookup
backlight: max8925_bl: Fix Device Tree node lookup
backlight: tps65217_bl: Fix Device Tree node lookup
mfd: intel-lpss: Program REMAP register in PIO mode
perf tools: Fix symbol and object code resolution for vdso32 and vdsox32
perf intel-pt: Fix sync_switch INTEL_PT_SS_NOT_TRACING
perf intel-pt: Fix decoding to accept CBR between FUP and corresponding TIP
perf intel-pt: Fix MTC timing after overflow
perf intel-pt: Fix "Unexpected indirect branch" error
perf intel-pt: Fix packet decoding of CYC packets
media: v4l2-compat-ioctl32: prevent go past max size
media: cx231xx: Add support for AverMedia DVD EZMaker 7
media: dvb_frontend: fix locking issues at dvb_frontend_get_event()
nfsd: restrict rd_maxcount to svc_max_payload in nfsd_encode_readdir
NFSv4: Fix possible 1-byte stack overflow in nfs_idmap_read_and_verify_message
video: uvesafb: Fix integer overflow in allocation
Input: elan_i2c - add ELAN0618 (Lenovo v330 15IKB) ACPI ID
xen: Remove unnecessary BUG_ON from __unbind_from_irq()
udf: Detect incorrect directory size
Input: elan_i2c_smbus - fix more potential stack buffer overflows
Input: elantech - enable middle button of touchpads on ThinkPad P52
Input: elantech - fix V4 report decoding for module with middle key
ALSA: hda/realtek - Add a quirk for FSC ESPRIMO U9210
Btrfs: fix unexpected cow in run_delalloc_nocow
spi: Fix scatterlist elements size in spi_map_buf
block: Fix transfer when chunk sectors exceeds max
dm thin: handle running out of data space vs concurrent discard
cdc_ncm: avoid padding beyond end of skb
Bluetooth: Fix connection if directed advertising and privacy is used
Linux 4.4.139
Change-Id: I93013bedf2ebe3e6a8718972d8854723609963cc
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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commit 18f3e95b90b28318ef35910d21c39908de672331 upstream.
While a barrier is present in the outX() functions before the register
write, a similar barrier is missing in the inX() functions after the
register read. This could allow memory accesses following inX() to
observe stale data.
This patch is very similar to commit a1cc7034e33d12dc1 ("MIPS: io: Add
barrier after register read in readX()"). Because war_io_reorder_wmb()
is both used by writeX() and outX(), if readX() need a barrier then so
does inX().
Cc: stable@vger.kernel.org
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Patchwork: https://patchwork.linux-mips.org/patch/19516/
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: James Hogan <james.hogan@mips.com>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: Huacai Chen <chenhuacai@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 2a027b47dba6b77ab8c8e47b589ae9bbc5ac6175 upstream.
The erratum and workaround are described by BCM5300X-ES300-RDS.pdf as
below.
R10: PCIe Transactions Periodically Fail
Description: The BCM5300X PCIe does not maintain transaction ordering.
This may cause PCIe transaction failure.
Fix Comment: Add a dummy PCIe configuration read after a PCIe
configuration write to ensure PCIe configuration access
ordering. Set ES bit of CP0 configu7 register to enable
sync function so that the sync instruction is functional.
Resolution: hndpci.c: extpci_write_config()
hndmips.c: si_mips_init()
mipsinc.h CONF7_ES
This is fixed by the CFE MIPS bcmsi chipset driver also for BCM47XX.
Also the dummy PCIe configuration read is already implemented in the
Linux BCMA driver.
Enable ExternalSync in Config7 when CONFIG_BCMA_DRIVER_PCI_HOSTMODE=y
too so that the sync instruction is externalised.
Signed-off-by: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Reviewed-by: Paul Burton <paul.burton@mips.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
Cc: Rafał Miłecki <zajec5@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/19461/
Signed-off-by: James Hogan <jhogan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 76ed0b803a2ab793a1b27d1dfe0de7955282cd34 upstream.
NUMREGBYTES (which is used as the size for gdb_regs[]) is incorrectly
based on DBG_MAX_REG_NUM instead of GDB_MAX_REGS. DBG_MAX_REG_NUM
is the number of total registers, while GDB_MAX_REGS is the number
of 'unsigned longs' it takes to serialize those registers. Since
FP registers require 3 'unsigned longs' each, DBG_MAX_REG_NUM is
smaller than GDB_MAX_REGS.
This causes GDB 8.0 give the following error on connect:
"Truncated register 19 in remote 'g' packet"
This also causes the register serialization/deserialization logic
to overflow gdb_regs[], overwriting whatever follows.
Fixes: 834b2964b7ab ("kgdb,arm: fix register dump")
Cc: <stable@vger.kernel.org> # 2.6.37+
Signed-off-by: David Rivshin <drivshin@allworx.com>
Acked-by: Rabin Vincent <rabin@rab.in>
Tested-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 722cde76d68e8cc4f3de42e71c82fd40dea4f7b9 upstream.
Unregister fadump on kexec down path otherwise the fadump registration
in new kexec-ed kernel complains that fadump is already registered.
This makes new kernel to continue using fadump registered by previous
kernel which may lead to invalid vmcore generation. Hence this patch
fixes this issue by un-registering fadump in fadump_cleanup() which is
called during kexec path so that new kernel can register fadump with
new valid values.
Fixes: b500afff11f6 ("fadump: Invalidate registration and release reserved memory for general use.")
Cc: stable@vger.kernel.org # v3.4+
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit cd6ef7eebf171bfcba7dc2df719c2a4958775040 upstream.
Back when we first introduced the DAWR, in commit 4ae7ebe9522a
("powerpc: Change hardware breakpoint to allow longer ranges"), we
screwed up the constraint making it a 1024 byte boundary rather than a
512. This makes the check overly permissive. Fortunately GDB is the
only real user and it always did they right thing, so we never
noticed.
This fixes the constraint to 512 bytes.
Fixes: 4ae7ebe9522a ("powerpc: Change hardware breakpoint to allow longer ranges")
Cc: stable@vger.kernel.org # v3.9+
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 4f7c06e26ec9cf7fe9f0c54dc90079b6a4f4b2c3 upstream.
In commit e2a800beaca1 ("powerpc/hw_brk: Fix off by one error when
validating DAWR region end") we fixed setting the DAWR end point to
its max value via PPC_PTRACE_SETHWDEBUG. Unfortunately we broke
PTRACE_SET_DEBUGREG when setting a 512 byte aligned breakpoint.
PTRACE_SET_DEBUGREG currently sets the length of the breakpoint to
zero (memset() in hw_breakpoint_init()). This worked with
arch_validate_hwbkpt_settings() before the above patch was applied but
is now broken if the breakpoint is 512byte aligned.
This sets the length of the breakpoint to 8 bytes when using
PTRACE_SET_DEBUGREG.
Fixes: e2a800beaca1 ("powerpc/hw_brk: Fix off by one error when validating DAWR region end")
Cc: stable@vger.kernel.org # v3.11+
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 91d06971881f71d945910de128658038513d1b24 upstream.
Currently we do not have an isync, or any other context synchronizing
instruction prior to the slbie/slbmte in _switch() that updates the
SLB entry for the kernel stack.
However that is not correct as outlined in the ISA.
From Power ISA Version 3.0B, Book III, Chapter 11, page 1133:
"Changing the contents of ... the contents of SLB entries ... can
have the side effect of altering the context in which data
addresses and instruction addresses are interpreted, and in which
instructions are executed and data accesses are performed.
...
These side effects need not occur in program order, and therefore
may require explicit synchronization by software.
...
The synchronizing instruction before the context-altering
instruction ensures that all instructions up to and including that
synchronizing instruction are fetched and executed in the context
that existed before the alteration."
And page 1136:
"For data accesses, the context synchronizing instruction before the
slbie, slbieg, slbia, slbmte, tlbie, or tlbiel instruction ensures
that all preceding instructions that access data storage have
completed to a point at which they have reported all exceptions
they will cause."
We're not aware of any bugs caused by this, but it should be fixed
regardless.
Add the missing isync when updating kernel stack SLB entry.
Cc: stable@vger.kernel.org
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
[mpe: Flesh out change log with more ISA text & explanation]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 6fb8656646f996d1eef42e6d56203c4915cb9e08 upstream.
ftrace_graph_caller was never run after calling ftrace_trace_function,
breaking the function graph tracer. Fix this, bringing it in line with the
x86 implementation.
While we're at it, also streamline the control flow of _mcount a bit to
reduce the number of branches.
This issue was reported before:
https://www.linux-mips.org/archives/linux-mips/2014-11/msg00295.html
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Tested-by: Matt Redfearn <matt.redfearn@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/18929/
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: stable@vger.kernel.org # v3.17+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 7de712ccc096b81d23cc0a941cd9b8cb3956605d upstream.
While working on changing this code to use force_sig_fault I
discovered that do_unaliged_user is sets si_signo to SIGBUS and passes
SIGSEGV to force_sig_info. Which is just b0rked.
The code is reporting a SIGBUS error so replace the SIGSEGV with SIGBUS.
Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: linux-xtensa@linux-xtensa.org
Cc: stable@vger.kernel.org
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Fixes: 5a0015d62668 ("[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 3")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 3f90f9ef2dda316d64e420d5d51ba369587ccc55 upstream.
If 020/030 support is enabled, get_io_area() leaves an IO_SIZE gap
between mappings which is added to the vm_struct representing the
mapping. __ioremap() uses the actual requested size (after alignment),
while __iounmap() is passed the size from the vm_struct.
On 020/030, early termination descriptors are used to set up mappings of
extent 'size', which are validated on unmapping. The unmapped gap of
size IO_SIZE defeats the sanity check of the pmd tables, causing
__iounmap() to loop forever on 030.
On 040/060, unmapping of page table entries does not check for a valid
mapping, so the umapping loop always completes there.
Adjust size to be unmapped by the gap that had been added in the
vm_struct prior.
This fixes the hang in atari_platform_init() reported a long time ago,
and a similar one reported by Finn recently (addressed by removing
ioremap() use from the SWIM driver.
Tested on my Falcon in 030 mode - untested but should work the same on
040/060 (the extra page tables cleared there would never have been set
up anyway).
Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
[geert: Minor commit description improvements]
[geert: This was fixed in 2.4.23, but not in 2.5.x]
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit eab6870fee877258122a042bfd99ee7908c40280 upstream.
Mark Rutland noticed that GCC optimization passes have the potential to elide
necessary invocations of the array_index_mask_nospec() instruction sequence,
so mark the asm() volatile.
Mark explains:
"The volatile will inhibit *some* cases where the compiler could lift the
array_index_nospec() call out of a branch, e.g. where there are multiple
invocations of array_index_nospec() with the same arguments:
if (idx < foo) {
idx1 = array_idx_nospec(idx, foo)
do_something(idx1);
}
< some other code >
if (idx < foo) {
idx2 = array_idx_nospec(idx, foo);
do_something_else(idx2);
}
... since the compiler can determine that the two invocations yield the same
result, and reuse the first result (likely the same register as idx was in
originally) for the second branch, effectively re-writing the above as:
if (idx < foo) {
idx = array_idx_nospec(idx, foo);
do_something(idx);
}
< some other code >
if (idx < foo) {
do_something_else(idx);
}
... if we don't take the first branch, then speculatively take the second, we
lose the nospec protection.
There's more info on volatile asm in the GCC docs:
https://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html#Volatile
"
Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Fixes: babdde2698d4 ("x86: Implement array_index_mask_nospec")
Link: https://lkml.kernel.org/lkml/152838798950.14521.4893346294059739135.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Enable GCM crypto support.
Change-Id: I08b9d20ad314117bb30b21ffc2eabe8dd0cac7d3
CRs-Fixed: 2263373
Signed-off-by: Devi Sandeep Endluri V V <dendluri@codeaurora.org>
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Enable GCM crypto support.
CRs-Fixed: 2263373
Change-Id: Ic243892a71551e880ece90876c38bb08fd709b4b
Signed-off-by: Devi Sandeep Endluri V V <dendluri@codeaurora.org>
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Disable all pmic gpios which are not necessary for
la-gvm.
Change-Id: I8f2156bdfd2a065b7f29d4028424f369739435cf
Signed-off-by: Venkata Rao Kakani <vkakani@codeaurora.org>
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Specify the length of the register blocks for sde
hardware on msm8996, which is needed to support
hardware register dumping.
CRs-Fixed: 2243728
Change-Id: I753ca0260ded630ef34ebf75913b22b22e741fb1
Signed-off-by: Guchun Chen <guchunc@codeaurora.org>
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Set default configuration of I2C_8 instance to disabled
state, for MSM8996 vplatform, such that clients can overwrite
and enable respective instance as per need.
Change-Id: I2e873cb27ba028323d6dc1a0aa302f2c32e2b69f
Signed-off-by: Shrey Vijay <shreyv@codeaurora.org>
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Added the QSEECOM ION heap node, to allow QSEECOM driver and QSEECOM
API library to allocate ION memory from QSEECOM heap.
Change-Id: I72162f8e45bfb8dd3d54e259947aa9604618a7ed
Signed-off-by: Jomana Artul <jartul@codeaurora.org>
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Do not unvote for the mss_cfg_ahb clock after the modem
boots up for modem ssr to work,so remove qcom,ahb-clk-vote
property for msm8996 auto boards
Change-Id: Id04bbb9c98bd3852727309c79a459a0bd353d534
Signed-off-by: Vivek Kumar <vivekuma@codeaurora.org>
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Enable the PMIC MPP08 for msm8996 CV2X boards. This
GPIO is used to power on the external modem.
Change-Id: I834d3896687be292b9e6f68f719e4ea317da2035
Signed-off-by: Gustavo Solaira <gustavos@codeaurora.org>
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Remove /dev/port, /dev/mem, /dev/kmem for CTS compliance.
Change-Id: If00db0070ab5ce91a4c05b2d26f8d9bd7f07cb3e
Signed-off-by: Venkata Rao Kakani <vkakani@codeaurora.org>
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* refs/heads/tmp-07c0138
Linux 4.4.138
crypto: vmx - Remove overly verbose printk from AES init routines
Input: elan_i2c - add ELAN0612 (Lenovo v330 14IKB) ACPI ID
Input: goodix - add new ACPI id for GPD Win 2 touch screen
kvm: x86: use correct privilege level for sgdt/sidt/fxsave/fxrstor access
vmw_balloon: fixing double free when batching mode is off
serial: samsung: fix maxburst parameter for DMA transactions
KVM: x86: pass kvm_vcpu to kvm_read_guest_virt and kvm_write_guest_virt_system
KVM: x86: introduce linear_{read,write}_system
Clarify (and fix) MAX_LFS_FILESIZE macros
gpio: No NULL owner
x86/crypto, x86/fpu: Remove X86_FEATURE_EAGER_FPU #ifdef from the crc32c code
af_key: Always verify length of provided sadb_key
x86/fpu: Fix math emulation in eager fpu mode
x86/fpu: Fix FNSAVE usage in eagerfpu mode
x86/fpu: Hard-disable lazy FPU mode
x86/fpu: Fix eager-FPU handling on legacy FPU machines
x86/fpu: Revert ("x86/fpu: Disable AVX when eagerfpu is off")
x86/fpu: Fix 'no387' regression
x86/fpu: Default eagerfpu=on on all CPUs
x86/fpu: Disable AVX when eagerfpu is off
x86/fpu: Disable MPX when eagerfpu is off
x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros
x86: Remove unused function cpu_has_ht_siblings()
x86/fpu: Fix early FPU command-line parsing
Change-Id: Ic1f041c07b90f130e7dcca9dc196df77848bcb1c
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>
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Changes in 4.4.138
x86/fpu: Fix early FPU command-line parsing
x86: Remove unused function cpu_has_ht_siblings()
x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros
x86/fpu: Disable MPX when eagerfpu is off
x86/fpu: Disable AVX when eagerfpu is off
x86/fpu: Default eagerfpu=on on all CPUs
x86/fpu: Fix 'no387' regression
x86/fpu: Revert ("x86/fpu: Disable AVX when eagerfpu is off")
x86/fpu: Fix eager-FPU handling on legacy FPU machines
x86/fpu: Hard-disable lazy FPU mode
x86/fpu: Fix FNSAVE usage in eagerfpu mode
x86/fpu: Fix math emulation in eager fpu mode
af_key: Always verify length of provided sadb_key
x86/crypto, x86/fpu: Remove X86_FEATURE_EAGER_FPU #ifdef from the crc32c code
gpio: No NULL owner
Clarify (and fix) MAX_LFS_FILESIZE macros
KVM: x86: introduce linear_{read,write}_system
KVM: x86: pass kvm_vcpu to kvm_read_guest_virt and kvm_write_guest_virt_system
serial: samsung: fix maxburst parameter for DMA transactions
vmw_balloon: fixing double free when batching mode is off
kvm: x86: use correct privilege level for sgdt/sidt/fxsave/fxrstor access
Input: goodix - add new ACPI id for GPD Win 2 touch screen
Input: elan_i2c - add ELAN0612 (Lenovo v330 14IKB) ACPI ID
crypto: vmx - Remove overly verbose printk from AES init routines
Linux 4.4.138
Change-Id: I443664406b736e16c77c99d83e9bdf02f4511ee4
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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commit 3c9fa24ca7c9c47605672916491f79e8ccacb9e6 upstream.
The functions that were used in the emulation of fxrstor, fxsave, sgdt and
sidt were originally meant for task switching, and as such they did not
check privilege levels. This is very bad when the same functions are used
in the emulation of unprivileged instructions. This is CVE-2018-10853.
The obvious fix is to add a new argument to ops->read_std and ops->write_std,
which decides whether the access is a "system" access or should use the
processor's CPL.
Fixes: 129a72a0d3c8 ("KVM: x86: Introduce segmented_write_std", 2017-01-12)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit ce14e868a54edeb2e30cb7a7b104a2fc4b9d76ca upstream.
Int the next patch the emulator's .read_std and .write_std callbacks will
grow another argument, which is not needed in kvm_read_guest_virt and
kvm_write_guest_virt_system's callers. Since we have to make separate
functions, let's give the currently existing names a nicer interface, too.
Fixes: 129a72a0d3c8 ("KVM: x86: Introduce segmented_write_std", 2017-01-12)
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 79367a65743975e5cac8d24d08eccc7fdae832b0 upstream.
Wrap the common invocation of ctxt->ops->read_std and ctxt->ops->write_std, so
as to have a smaller patch when the functions grow another argument.
Fixes: 129a72a0d3c8 ("KVM: x86: Introduce segmented_write_std", 2017-01-12)
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 02f39b2379fb81557ae864ec8f85421c0250c954 upstream.
The crypto code was checking both use_eager_fpu() and
defined(X86_FEATURE_EAGER_FPU). The latter was nonsensical, so
remove it. This will avoid breakage when we remove
X86_FEATURE_EAGER_FPU.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Rik van Riel <riel@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: pbonzini@redhat.com
Link: http://lkml.kernel.org/r/1475627678-20788-2-git-send-email-riel@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 4ecd16ec7059390b430af34bd8bc3ca2b5dcef9a upstream.
Systems without an FPU are generally old and therefore use lazy FPU
switching. Unsurprisingly, math emulation in eager FPU mode is a
bit buggy. Fix it.
There were two bugs involving kernel code trying to use the FPU
registers in eager mode even if they didn't exist and one BUG_ON()
that was incorrect.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: yu-cheng yu <yu-cheng.yu@intel.com>
Link: http://lkml.kernel.org/r/b4b8d112436bd6fab866e1b4011131507e8d7fbe.1453675014.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 5ed73f40735c68d8a656b46d09b1885d3b8740ae upstream.
In eager fpu mode, having deactivated FPU without immediately
reloading some other context is illegal. Therefore, to recover from
FNSAVE, we can't just deactivate the state -- we need to reload it
if we're not actively context switching.
We had this wrong in fpu__save() and fpu__copy(). Fix both.
__kernel_fpu_begin() was fine -- add a comment.
This fixes a warning triggerable with nofxsr eagerfpu=on.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: yu-cheng yu <yu-cheng.yu@intel.com>
Link: http://lkml.kernel.org/r/60662444e13c76f06e23c15c5dcdba31b4ac3d67.1453675014.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit ca6938a1cd8a1c5e861a99b67f84ac166fc2b9e7 upstream.
Since commit:
58122bf1d856 ("x86/fpu: Default eagerfpu=on on all CPUs")
... in Linux 4.6, eager FPU mode has been the default on all x86
systems, and no one has reported any regressions.
This patch removes the ability to enable lazy mode: use_eager_fpu()
becomes "return true" and all of the FPU mode selection machinery is
removed.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Rik van Riel <riel@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: pbonzini@redhat.com
Link: http://lkml.kernel.org/r/1475627678-20788-3-git-send-email-riel@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 6e6867093de35141f0a76b66ac13f9f2e2c8e77a upstream.
i486 derived cores like Intel Quark support only the very old,
legacy x87 FPU (FSAVE/FRSTOR, CPUID bit FXSR is not set), and
our FPU code wasn't handling the saving and restoring there
properly in the 'eagerfpu' case.
So after we made eagerfpu the default for all CPU types:
58122bf1d856 x86/fpu: Default eagerfpu=on on all CPUs
these old FPU designs broke. First, Andy Shevchenko reported a splat:
WARNING: CPU: 0 PID: 823 at arch/x86/include/asm/fpu/internal.h:163 fpu__clear+0x8c/0x160
which was us trying to execute FXRSTOR on those machines even though
they don't support it.
After taking care of that, Bryan O'Donoghue reported that a simple FPU
test still failed because we weren't initializing the FPU state properly
on those machines.
Take care of all that.
Reported-and-tested-by: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Reported-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yu-cheng <yu-cheng.yu@intel.com>
Link: http://lkml.kernel.org/r/20160311113206.GD4312@pd.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit a65050c6f17e52442716138d48d0a47301a8344b upstream.
Leonid Shatz noticed that the SDM interpretation of the following
recent commit:
394db20ca240741 ("x86/fpu: Disable AVX when eagerfpu is off")
... is incorrect and that the original behavior of the FPU code was correct.
Because AVX is not stated in CR0 TS bit description, it was mistakenly
believed to be not supported for lazy context switch. This turns out
to be false:
Intel Software Developer's Manual Vol. 3A, Sec. 2.5 Control Registers:
'TS Task Switched bit (bit 3 of CR0) -- Allows the saving of the x87 FPU/
MMX/SSE/SSE2/SSE3/SSSE3/SSE4 context on a task switch to be delayed until
an x87 FPU/MMX/SSE/SSE2/SSE3/SSSE3/SSE4 instruction is actually executed
by the new task.'
Intel Software Developer's Manual Vol. 2A, Sec. 2.4 Instruction Exception
Specification:
'AVX instructions refer to exceptions by classes that include #NM
"Device Not Available" exception for lazy context switch.'
So revert the commit.
Reported-by: Leonid Shatz <leonid.shatz@ravellosystems.com>
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi V. Shankar <ravi.v.shankar@intel.com>
Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1457569734-3785-1-git-send-email-yu-cheng.yu@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f363938c70a04e6bc99023a5e0c44ef7879b903f upstream.
After fixing FPU option parsing, we now parse the 'no387' boot option
too early: no387 clears X86_FEATURE_FPU before it's even probed, so
the boot CPU promptly re-enables it.
I suspect it gets even more confused on SMP.
Fix the probing code to leave X86_FEATURE_FPU off if it's been
disabled by setup_clear_cpu_cap().
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: yu-cheng yu <yu-cheng.yu@intel.com>
Fixes: 4f81cbafcce2 ("x86/fpu: Fix early FPU command-line parsing")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 58122bf1d856a4ea9581d62a07c557d997d46a19 upstream.
We have eager and lazy FPU modes, introduced in:
304bceda6a18 ("x86, fpu: use non-lazy fpu restore for processors supporting xsave")
The result is rather messy. There are two code paths in almost all
of the FPU code, and only one of them (the eager case) is tested
frequently, since most kernel developers have new enough hardware
that we use eagerfpu.
It seems that, on any remotely recent hardware, eagerfpu is a win:
glibc uses SSE2, so laziness is probably overoptimistic, and, in any
case, manipulating TS is far slower that saving and restoring the
full state. (Stores to CR0.TS are serializing and are poorly
optimized.)
To try to shake out any latent issues on old hardware, this changes
the default to eager on all CPUs. If no performance or functionality
problems show up, a subsequent patch could remove lazy mode entirely.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: yu-cheng yu <yu-cheng.yu@intel.com>
Link: http://lkml.kernel.org/r/ac290de61bf08d9cfc2664a4f5080257ffc1075a.1453675014.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 394db20ca240741a08d472173db13d6f6a6e5a28 upstream.
When "eagerfpu=off" is given as a command-line input, the kernel
should disable AVX support.
The Task Switched bit used for lazy context switching does not
support AVX. If AVX is enabled without eagerfpu context
switching, one task's AVX state could become corrupted or leak
to other tasks. This is a bug and has bad security implications.
This only affects systems that have AVX/AVX2/AVX512 and this
issue will be found only when one actually uses AVX/AVX2/AVX512
_AND_ does eagerfpu=off.
Reference: Intel Software Developer's Manual Vol. 3A
Sec. 2.5 Control Registers:
TS Task Switched bit (bit 3 of CR0) -- Allows the saving of the
x87 FPU/ MMX/SSE/SSE2/SSE3/SSSE3/SSE4 context on a task switch
to be delayed until an x87 FPU/MMX/SSE/SSE2/SSE3/SSSE3/SSE4
instruction is actually executed by the new task.
Sec. 13.4.1 Using the TS Flag to Control the Saving of the X87
FPU and SSE State
When the TS flag is set, the processor monitors the instruction
stream for x87 FPU, MMX, SSE instructions. When the processor
detects one of these instructions, it raises a
device-not-available exeception (#NM) prior to executing the
instruction.
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Ravi V. Shankar <ravi.v.shankar@intel.com>
Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: yu-cheng yu <yu-cheng.yu@intel.com>
Link: http://lkml.kernel.org/r/1452119094-7252-5-git-send-email-yu-cheng.yu@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
