Commit Graph

811044 Commits

Author SHA1 Message Date
Chuck Lever
deaa5c96c2 SUNRPC: Address Kerberos performance/behavior regression
When using Kerberos with v4.20, I've observed frequent connection
loss on heavy workloads. I traced it down to the client underrunning
the GSS sequence number window -- NFS servers are required to drop
the RPC with the low sequence number, and also drop the connection
to signal that an RPC was dropped.

Bisected to commit 918f3c1fe8 ("SUNRPC: Improve latency for
interactive tasks").

I've got a one-line workaround for this issue, which is easy to
backport to v4.20 while a more permanent solution is being derived.
Essentially, tk_owner-based sorting is disabled for RPCs that carry
a GSS sequence number.

Fixes: 918f3c1fe8 ("SUNRPC: Improve latency for interactive ... ")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-01-15 15:36:41 -05:00
Lorenz Bauer
86edaed379 bpf: libbpf: retry loading program on EAGAIN
Commit c3494801cd ("bpf: check pending signals while
verifying programs") makes it possible for the BPF_PROG_LOAD
to fail with EAGAIN. Retry unconditionally in this case.

Fixes: c3494801cd ("bpf: check pending signals while verifying programs")
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-01-15 21:35:34 +01:00
Trond Myklebust
97b78ae96b SUNRPC: Ensure we respect the RPCSEC_GSS sequence number limit
According to RFC2203, the RPCSEC_GSS sequence numbers are bounded to
an upper limit of MAXSEQ = 0x80000000. Ensure that we handle that
correctly.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-01-15 15:32:21 -05:00
Trond Myklebust
e66721f043 SUNRPC: Ensure rq_bytes_sent is reset before request transmission
When we resend a request, ensure that the 'rq_bytes_sent' is reset
to zero.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-01-15 15:28:18 -05:00
Yonghong Song
6bf3bbe1f4 samples/bpf: workaround clang asm goto compilation errors
x86 compilation has required asm goto support since 4.17.
Since clang does not support asm goto, at 4.17,
Commit b1ae32dbab ("x86/cpufeature: Guard asm_volatile_goto usage
for BPF compilation") worked around the issue by permitting an
alternative implementation without asm goto for clang.

At 5.0, more asm goto usages appeared.
  [yhs@148 x86]$ egrep -r asm_volatile_goto
  include/asm/cpufeature.h:     asm_volatile_goto("1: jmp 6f\n"
  include/asm/jump_label.h:     asm_volatile_goto("1:"
  include/asm/jump_label.h:     asm_volatile_goto("1:"
  include/asm/rmwcc.h:  asm_volatile_goto (fullop "; j" #cc " %l[cc_label]"     \
  include/asm/uaccess.h:        asm_volatile_goto("\n"                          \
  include/asm/uaccess.h:        asm_volatile_goto("\n"                          \
  [yhs@148 x86]$

Compiling samples/bpf directories, most bpf programs failed
compilation with error messages like:
  In file included from /home/yhs/work/bpf-next/samples/bpf/xdp_sample_pkts_kern.c:2:
  In file included from /home/yhs/work/bpf-next/include/linux/ptrace.h:6:
  In file included from /home/yhs/work/bpf-next/include/linux/sched.h:15:
  In file included from /home/yhs/work/bpf-next/include/linux/sem.h:5:
  In file included from /home/yhs/work/bpf-next/include/uapi/linux/sem.h:5:
  In file included from /home/yhs/work/bpf-next/include/linux/ipc.h:9:
  In file included from /home/yhs/work/bpf-next/include/linux/refcount.h:72:
  /home/yhs/work/bpf-next/arch/x86/include/asm/refcount.h:70:9: error: 'asm goto' constructs are not supported yet
        return GEN_BINARY_SUFFIXED_RMWcc(LOCK_PREFIX "subl",
               ^
  /home/yhs/work/bpf-next/arch/x86/include/asm/rmwcc.h:67:2: note: expanded from macro 'GEN_BINARY_SUFFIXED_RMWcc'
        __GEN_RMWcc(op " %[val], %[var]\n\t" suffix, var, cc,           \
        ^
  /home/yhs/work/bpf-next/arch/x86/include/asm/rmwcc.h:21:2: note: expanded from macro '__GEN_RMWcc'
        asm_volatile_goto (fullop "; j" #cc " %l[cc_label]"             \
        ^
  /home/yhs/work/bpf-next/include/linux/compiler_types.h:188:37: note: expanded from macro 'asm_volatile_goto'
  #define asm_volatile_goto(x...) asm goto(x)

Most implementation does not even provide an alternative
implementation. And it is also not practical to make changes
for each call site.

This patch workarounded the asm goto issue by redefining the macro like below:
  #define asm_volatile_goto(x...) asm volatile("invalid use of asm_volatile_goto")

If asm_volatile_goto is not used by bpf programs, which is typically the case, nothing bad
will happen. If asm_volatile_goto is used by bpf programs, which is incorrect, the compiler
will issue an error since "invalid use of asm_volatile_goto" is not valid assembly codes.

With this patch, all bpf programs under samples/bpf can pass compilation.

Note that bpf programs under tools/testing/selftests/bpf/ compiled fine as
they do not access kernel internal headers.

Fixes: e769742d35 ("Revert "x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs"")
Fixes: 18fe58229d ("x86, asm: change the GEN_*_RMWcc() macros to not quote the condition")
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-01-15 20:57:30 +01:00
Stanislav Fomichev
1be72f29bf selftests/bpf: install with_tunnels.sh for test_flow_dissector.sh
test_flow_dissector.sh depends on both with_addr.sh and with_tunnels.sh
However, we install only with_addr.sh.

Add with_tunnels.sh to TEST_PROGS_EXTENDED to make sure it gets
installed as well.

Tested with: make TARGETS=bpf install INSTALL_PATH=$PWD/x

Fixes: ef4ab8447a ("selftests: bpf: install script with_addr.sh")
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-01-15 20:53:30 +01:00
Krzysztof Kazimierczak
cc5b5d3565 xsk: Check if a queue exists during umem setup
In the xdp_umem_assign_dev() path, the xsk code does not
check if a queue for which umem is to be created exists.
It leads to a situation where umem is not assigned to any
Tx/Rx queue of a netdevice, without notifying the stack
about an error. This affects both XDP_SKB and XDP_DRV
modes - in case of XDP_DRV_ZC, queue index is checked by
the driver.

This patch fixes xsk code, so that in both XDP_SKB and
XDP_DRV mode of AF_XDP, an error is returned when requested
queue index exceedes an existing maximum.

Fixes: c9b47cc1fa ("xsk: fix bug when trying to use both copy and zero-copy on one queue id")
Reported-by: Jakub Spizewski <jakub.spizewski@intel.com>
Signed-off-by: Krzysztof Kazimierczak <krzysztof.kazimierczak@intel.com>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-01-15 20:51:57 +01:00
Tycho Andersen
a811dc6155 seccomp: fix UAF in user-trap code
On the failure path, we do an fput() of the listener fd if the filter fails
to install (e.g. because of a TSYNC race that's lost, or if the thread is
killed, etc.). fput() doesn't actually release the fd, it just ads it to a
work queue. Then the thread proceeds to free the filter, even though the
listener struct file has a reference to it.

To fix this, on the failure path let's set the private data to null, so we
know in ->release() to ignore the filter.

Reported-by: syzbot+981c26489b2d1c6316ba@syzkaller.appspotmail.com
Fixes: 6a21cc50f0 ("seccomp: add a return code to trap to userspace")
Signed-off-by: Tycho Andersen <tycho@tycho.ws>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
2019-01-15 09:43:12 -08:00
Linus Walleij
663ec3a2c2 mtd: rawnand: fsmc: Keep bank enable bit set
Hammering the "bank enable" (PBKEN) bit on and off between
every command crashes the Nomadik NHK15 with this message:

Scanning device for bad blocks
Unhandled fault: external abort on non-linefetch (0x008) at 0xcc95e000
pgd = (ptrval)
[cc95e000] *pgd=0b808811, *pte=40000653, *ppte=40000552
Internal error: : 8 [#1] PREEMPT ARM
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted 4.20.0-rc2+ #72
Hardware name: Nomadik STn8815
PC is at fsmc_exec_op+0x194/0x204
(...)

After a discussion we (me and Boris Brezillon) start to suspect
that this bit does not immediately control the chip select line
at all, it rather enables access to the bank and the hardware
will drive the CS autonomously. If there is a NAND chip connected,
we should keep this enabled.

As fsmc_nand_setup() sets this bit, we can simply remove the
offending code.

Fixes: 550b9fc4e3 ("mtd: rawnand: fsmc: Stop implementing ->select_chip()")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
2019-01-15 18:29:53 +01:00
Linus Torvalds
7939f8beec Andrea Righi fixed a NULL pointer dereference in trace_kprobe_create()
It is possible to trigger a NULL pointer dereference by writing an
 incorrectly formatted string to the krpobe_events file.
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Merge tag 'trace-v5.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fix from Steven Rostedt:
 "Andrea Righi fixed a NULL pointer dereference in trace_kprobe_create()

  It is possible to trigger a NULL pointer dereference by writing an
  incorrectly formatted string to the krpobe_events file"

* tag 'trace-v5.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing/kprobes: Fix NULL pointer dereference in trace_kprobe_create()
2019-01-16 05:28:26 +12:00
Linus Torvalds
e8746440bf Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Fix regression in multi-SKB responses to RTM_GETADDR, from Arthur
    Gautier.

 2) Fix ipv6 frag parsing in openvswitch, from Yi-Hung Wei.

 3) Unbounded recursion in ipv4 and ipv6 GUE tunnels, from Stefano
    Brivio.

 4) Use after free in hns driver, from Yonglong Liu.

 5) icmp6_send() needs to handle the case of NULL skb, from Eric
    Dumazet.

 6) Missing rcu read lock in __inet6_bind() when operating on mapped
    addresses, from David Ahern.

 7) Memory leak in tipc-nl_compat_publ_dump(), from Gustavo A. R. Silva.

 8) Fix PHY vs r8169 module loading ordering issues, from Heiner
    Kallweit.

 9) Fix bridge vlan memory leak, from Ido Schimmel.

10) Dev refcount leak in AF_PACKET, from Jason Gunthorpe.

11) Infoleak in ipv6_local_error(), flow label isn't completely
    initialized. From Eric Dumazet.

12) Handle mv88e6390 errata, from Andrew Lunn.

13) Making vhost/vsock CID hashing consistent, from Zha Bin.

14) Fix lack of UMH cleanup when it unexpectedly exits, from Taehee Yoo.

15) Bridge forwarding must clear skb->tstamp, from Paolo Abeni.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (87 commits)
  bnxt_en: Fix context memory allocation.
  bnxt_en: Fix ring checking logic on 57500 chips.
  mISDN: hfcsusb: Use struct_size() in kzalloc()
  net: clear skb->tstamp in bridge forwarding path
  net: bpfilter: disallow to remove bpfilter module while being used
  net: bpfilter: restart bpfilter_umh when error occurred
  net: bpfilter: use cleanup callback to release umh_info
  umh: add exit routine for UMH process
  isdn: i4l: isdn_tty: Fix some concurrency double-free bugs
  vhost/vsock: fix vhost vsock cid hashing inconsistent
  net: stmmac: Prevent RX starvation in stmmac_napi_poll()
  net: stmmac: Fix the logic of checking if RX Watchdog must be enabled
  net: stmmac: Check if CBS is supported before configuring
  net: stmmac: dwxgmac2: Only clear interrupts that are active
  net: stmmac: Fix PCI module removal leak
  tools/bpf: fix bpftool map dump with bitfields
  tools/bpf: test btf bitfield with >=256 struct member offset
  bpf: fix bpffs bitfield pretty print
  net: ethernet: mediatek: fix warning in phy_start_aneg
  tcp: change txhash on SYN-data timeout
  ...
2019-01-16 05:13:36 +12:00
Andrea Righi
8b05a3a750 tracing/kprobes: Fix NULL pointer dereference in trace_kprobe_create()
It is possible to trigger a NULL pointer dereference by writing an
incorrectly formatted string to krpobe_events (trying to create a
kretprobe omitting the symbol).

Example:

 echo "r:event_1 " >> /sys/kernel/debug/tracing/kprobe_events

That triggers this:

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
 #PF error: [normal kernel read fault]
 PGD 0 P4D 0
 Oops: 0000 [#1] SMP PTI
 CPU: 6 PID: 1757 Comm: bash Not tainted 5.0.0-rc1+ #125
 Hardware name: Dell Inc. XPS 13 9370/0F6P3V, BIOS 1.5.1 08/09/2018
 RIP: 0010:kstrtoull+0x2/0x20
 Code: 28 00 00 00 75 17 48 83 c4 18 5b 41 5c 5d c3 b8 ea ff ff ff eb e1 b8 de ff ff ff eb da e8 d6 36 bb ff 66 0f 1f 44 00 00 31 c0 <80> 3f 2b 55 48 89 e5 0f 94 c0 48 01 c7 e8 5c ff ff ff 5d c3 66 2e
 RSP: 0018:ffffb5d482e57cb8 EFLAGS: 00010246
 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff82b12720
 RDX: ffffb5d482e57cf8 RSI: 0000000000000000 RDI: 0000000000000000
 RBP: ffffb5d482e57d70 R08: ffffa0c05e5a7080 R09: ffffa0c05e003980
 R10: 0000000000000000 R11: 0000000040000000 R12: ffffa0c04fe87b08
 R13: 0000000000000001 R14: 000000000000000b R15: ffffa0c058d749e1
 FS:  00007f137c7f7740(0000) GS:ffffa0c05e580000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000000 CR3: 0000000497d46004 CR4: 00000000003606e0
 Call Trace:
  ? trace_kprobe_create+0xb6/0x840
  ? _cond_resched+0x19/0x40
  ? _cond_resched+0x19/0x40
  ? __kmalloc+0x62/0x210
  ? argv_split+0x8f/0x140
  ? trace_kprobe_create+0x840/0x840
  ? trace_kprobe_create+0x840/0x840
  create_or_delete_trace_kprobe+0x11/0x30
  trace_run_command+0x50/0x90
  trace_parse_run_command+0xc1/0x160
  probes_write+0x10/0x20
  __vfs_write+0x3a/0x1b0
  ? apparmor_file_permission+0x1a/0x20
  ? security_file_permission+0x31/0xf0
  ? _cond_resched+0x19/0x40
  vfs_write+0xb1/0x1a0
  ksys_write+0x55/0xc0
  __x64_sys_write+0x1a/0x20
  do_syscall_64+0x5a/0x120
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fix by doing the proper argument checks in trace_kprobe_create().

Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/lkml/20190111095108.b79a2ee026185cbd62365977@kernel.org
Link: http://lkml.kernel.org/r/20190111060113.GA22841@xps-13
Fixes: 6212dd2968 ("tracing/kprobes: Use dyn_event framework for kprobe events")
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Andrea Righi <righi.andrea@gmail.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-01-15 11:33:45 -05:00
Olga Kornievskaia
45ac486ecf NFSv4.2 fix unnecessary retry in nfs4_copy_file_range
Currently nfs42_proc_copy_file_range() can not return EAGAIN.

Fixes: e4648aa4f9 ("NFS recover from destination server reboot for copies")
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-01-15 11:24:49 -05:00
Michel Dänzer
92b0730eaf Revert "drm/amdgpu: validate user pitch alignment"
The check turned out to be too strict in some cases.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-15 11:14:25 -05:00
Alex Deucher
25ec429e86 Revert "drm/amdgpu: validate user GEM object size"
It was at the same time too strict (for linear tiling modes, where no
height alignment is required) and too lenient (for 2D tiling modes,
where height may need to be aligned to values > 8).

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-15 11:14:21 -05:00
Jan Kara
04906b2f54 blockdev: Fix livelocks on loop device
bd_set_size() updates also block device's block size. This is somewhat
unexpected from its name and at this point, only blkdev_open() uses this
functionality. Furthermore, this can result in changing block size under
a filesystem mounted on a loop device which leads to livelocks inside
__getblk_gfp() like:

Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10863 Comm: syz-executor0 Not tainted 4.18.0-rc5+ #151
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google
01/01/2011
RIP: 0010:__sanitizer_cov_trace_pc+0x3f/0x50 kernel/kcov.c:106
...
Call Trace:
 init_page_buffers+0x3e2/0x530 fs/buffer.c:904
 grow_dev_page fs/buffer.c:947 [inline]
 grow_buffers fs/buffer.c:1009 [inline]
 __getblk_slow fs/buffer.c:1036 [inline]
 __getblk_gfp+0x906/0xb10 fs/buffer.c:1313
 __bread_gfp+0x2d/0x310 fs/buffer.c:1347
 sb_bread include/linux/buffer_head.h:307 [inline]
 fat12_ent_bread+0x14e/0x3d0 fs/fat/fatent.c:75
 fat_ent_read_block fs/fat/fatent.c:441 [inline]
 fat_alloc_clusters+0x8ce/0x16e0 fs/fat/fatent.c:489
 fat_add_cluster+0x7a/0x150 fs/fat/inode.c:101
 __fat_get_block fs/fat/inode.c:148 [inline]
...

Trivial reproducer for the problem looks like:

truncate -s 1G /tmp/image
losetup /dev/loop0 /tmp/image
mkfs.ext4 -b 1024 /dev/loop0
mount -t ext4 /dev/loop0 /mnt
losetup -c /dev/loop0
l /mnt

Fix the problem by moving initialization of a block device block size
into a separate function and call it when needed.

Thanks to Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> for help with
debugging the problem.

Reported-by: syzbot+9933e4476f365f5d5a1b@syzkaller.appspotmail.com
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-01-15 07:30:56 -07:00
Jan Kara
c8a83a6b54 nbd: Use set_blocksize() to set device blocksize
NBD can update block device block size implicitely through
bd_set_size(). Make it explicitely set blocksize with set_blocksize() as
this behavior of bd_set_size() is going away.

CC: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-01-15 07:30:54 -07:00
Neil Armstrong
ce0210c124 drm/meson: Fix atomic mode switching regression
Since commit 2bcd3ecab7 when switching mode from X11 (ubuntu mate for
example) the display gets blurry, looking like an invalid framebuffer width.

This commit fixed atomic crtc modesetting in a totally wrong way and
introduced a local unnecessary ->enabled crtc state.

This commit reverts the crctc _begin() and _enable() changes and simply
adds drm_atomic_helper_commit_tail_rpm as helper.

Reported-by: Tony McKahan <tonymckahan@gmail.com>
Suggested-by: Daniel Vetter <daniel@ffwll.ch>
Fixes: 2bcd3ecab7 ("drm/meson: Fixes for drm_crtc_vblank_on/off support")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[narmstrong: fixed blank line issue from checkpatch]
Link: https://patchwork.freedesktop.org/patch/msgid/20190114153118.8024-1-narmstrong@baylibre.com
2019-01-15 13:21:32 +01:00
Zhenyu Wang
51b00d8509 drm/i915/gvt: Fix mmap range check
This is to fix missed mmap range check on vGPU bar2 region
and only allow to map vGPU allocated GMADDR range, which means
user space should support sparse mmap to get proper offset for
mmap vGPU aperture. And this takes care of actual pgoff in mmap
request as original code always does from beginning of vGPU
aperture.

Fixes: 659643f7d8 ("drm/i915/gvt/kvmgt: add vfio/mdev support to KVMGT")
Cc: "Monroy, Rodrigo Axel" <rodrigo.axel.monroy@intel.com>
Cc: "Orrala Contreras, Alfredo" <alfredo.orrala.contreras@intel.com>
Cc: stable@vger.kernel.org # v4.10+
Reviewed-by: Hang Yuan <hang.yuan@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
2019-01-15 19:04:45 +08:00
Michael Ellerman
7bea7ac0ca powerpc/syscalls: Fix syscall tracing
Recently in commit fbf508da74 ("powerpc: split compat syscall table
out from native table") we changed the layout of the system call
table. Instead of having two entries for each syscall number, one for
the regular entry point and one for the compat entry point, we now
have separate tables for regular and compat entry points.

This inadvertently broke syscall tracing (CONFIG_FTRACE_SYSCALLS),
because our implementation of arch_syscall_addr() knew about the
layout of the table (it did nr * 2).

We can fix it just by dropping our version of arch_syscall_addr() and
using the generic version which does:

	return (unsigned long)sys_call_table[nr];

Fixes: fbf508da74 ("powerpc: split compat syscall table out from native table")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-01-15 21:32:25 +11:00
Hang Yuan
6c2d0f9976 drm/i915/gvt: free VFIO region space in vgpu detach
VFIO region space is allocated when one region is registered for
one vgpu. So free the space when destroy the vgpu.

Also change the parameter of detach_vgpu callback to use vgpu directly.

Fixes: b851adeac0 ("drm/i915/gvt: Add opregion support")
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Hang Yuan <hang.yuan@linux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
2019-01-15 18:28:15 +08:00
Jason A. Donenfeld
da727097a4 powerpc/pseries: Fix build break due to pnv_npu2_init()
Commit 3be2df00e2 ("powerpc/pseries/npu: Enable platform support")
added a call to pnv_npu2_init() in pseries code. This causes a build
break if we build with CONFIG_PPC_PSERIES && !CONFIG_PPC_POWERNV:

  powerpc64le-pc-linux-gnu-ld: arch/powerpc/platforms/pseries/pci.o: in function `pSeries_final_fixup':
  pci.c:(.init.text+0x1b0): undefined reference to `pnv_npu2_init'

This commit therefore wraps that line in an ifdef, so that pseries
builds without powernv.

Fixes: 3be2df00e2 ("powerpc/pseries/npu: Enable platform support")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
[mpe: Frob change log a bit to blame a different commit]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-01-15 21:27:47 +11:00
Vitor Soares
f29fd331aa i3c: master: dw-i3c-master: fix i3c_attach/reattach
This patch fix i3c_attach/reattach functions.

During the i3c_attach the driver ignores the static address used for
SETDASA CCC command.

During the i3c_reattach the driver doesn't update master->addrs[data->index]
with new address if old_dyn_addr = 0.

Fixes: 1dd728f5d4 ("i3c: master: Add driver for Synopsys DesignWare IP")
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
2019-01-15 11:15:11 +01:00
Ming Lei
fe76fc6aaf sbitmap: Protect swap_lock from hardirq
Because we may call blk_mq_get_driver_tag() directly from
blk_mq_dispatch_rq_list() without holding any lock, then HARDIRQ may
come and the above DEADLOCK is triggered.

Commit ab53dcfb3e7b ("sbitmap: Protect swap_lock from hardirq") tries to
fix this issue by using 'spin_lock_bh', which isn't enough because we
complete request from hardirq context direclty in case of multiqueue.

Cc: Clark Williams <williams@redhat.com>
Fixes: ab53dcfb3e7b ("sbitmap: Protect swap_lock from hardirq")
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-01-15 16:29:57 +12:00
Wei Yang
b4fe30e45a acpi/nfit: Remove duplicate set nd_set in acpi_nfit_init_interleave_set()
We allocate nd_set in acpi_nfit_init_interleave_set() and assignn it to
ndr_desc, while the assignment is done twice in this function.

This patch removes the first assignment. No functional change.

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2019-01-14 18:59:08 -08:00
Bijan Mottahedeh
8e5dadfe76 vhost/scsi: Use copy_to_iter() to send control queue response
Uses copy_to_iter() instead of __copy_to_user() in order to ensure we
support arbitrary layouts and an input buffer split across iov entries.

Fixes: 0d02dbd68c ("vhost/scsi: Respond to control queue operations")
Signed-off-by: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2019-01-14 20:28:08 -05:00
Pavel Tikhomirov
74ad741948 vhost: return EINVAL if iovecs size does not match the message size
We've failed to copy and process vhost_iotlb_msg so let userspace at
least know about it. For instance before these patch the code below runs
without any error:

int main()
{
  struct vhost_msg msg;
  struct iovec iov;
  int fd;

  fd = open("/dev/vhost-net", O_RDWR);
  if (fd == -1) {
    perror("open");
    return 1;
  }

  iov.iov_base = &msg;
  iov.iov_len = sizeof(msg)-4;

  if (writev(fd, &iov,1) == -1) {
    perror("writev");
    return 1;
  }

  return 0;
}

Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2019-01-14 20:28:07 -05:00
Wei Wang
bf4dc0b2be virtio-balloon: tweak config_changed implementation
virtio-ccw has deadlock issues with reading the config space inside the
interrupt context, so we tweak the virtballoon_changed implementation
by moving the config read operations into the related workqueue contexts.
The config_read_bitmap is used as a flag to the workqueue callbacks
about the related config fields that need to be read.

The cmd_id_received is also renamed to cmd_id_received_cache, and
the value should be obtained via virtio_balloon_cmd_id_received.

Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 86a559787e ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
2019-01-14 20:15:20 -05:00
Wei Wang
a229989d97 virtio: don't allocate vqs when names[i] = NULL
Some vqs may not need to be allocated when their related feature bits
are disabled. So callers may pass in such vqs with "names = NULL".
Then we skip such vq allocations.

Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 86a559787e ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")
2019-01-14 20:15:19 -05:00
Wei Wang
ddbeac07a3 virtio_pci: use queue idx instead of array idx to set up the vq
When find_vqs, there will be no vq[i] allocation if its corresponding
names[i] is NULL. For example, the caller may pass in names[i] (i=4)
with names[2] being NULL because the related feature bit is turned off,
so technically there are 3 queues on the device, and name[4] should
correspond to the 3rd queue on the device.

So we use queue_idx as the queue index, which is increased only when the
queue exists.

Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
2019-01-14 20:15:18 -05:00
Cornelia Huck
d1c1dad89e virtio: document virtio_config_ops restrictions
Some transports (e.g. virtio-ccw) implement virtio operations that
seem to be a simple read/write as something more involved that
cannot be done from an atomic context.

Give at least a hint about that.

Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2019-01-14 20:15:17 -05:00
Cornelia Huck
b89a07c437 virtio: fix virtio_config_ops description
- get_features has returned 64 bits since commit d025477368
  ("virtio: add support for 64 bit features.")
- properly mark all optional callbacks

Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
2019-01-14 20:15:17 -05:00
Rob Herring
2e8cb2cf1b PCI: Fix PCI kconfig menu organization
After commit eb01d42a77 ("PCI: consolidate PCI config entry in
drivers/pci"), all the PCI kconfig options appear below "PCI support"
rather than within a sub-menu.  This is because menuconfig expects all
kconfig entries to be enclosed in an if/endif section.  Add the missing
if/endif.

With this, "depends on PCI" is redundant in the sub-menu  entries and can
be removed.

Fixes: eb01d42a77 ("PCI: consolidate PCI config entry in drivers/pci")
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-01-14 17:01:20 -06:00
Mark Zhang
7151449fe7
regmap-irq: do not write mask register if mask_base is zero
If client have not provided the mask base register then do not
write into the mask register.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Jinyoung Park <jinyoungp@nvidia.com>
Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Signed-off-by: Mark Zhang <markz@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-14 22:11:22 +00:00
Aurelien Jarno
8a644c64a9
MIPS: OCTEON: fix kexec support
Commit 62cac480f3 ("MIPS: kexec: Make a framework for both jumping and
halting on nonboot CPUs") broke the build of the OCTEON platform as
the relocated_kexec_smp_wait() is now static and not longer exported in
kexec.h.

Replace it by kexec_reboot() like it has been done in other places.

Fixes: 62cac480f3 ("MIPS: kexec: Make a framework for both jumping and halting on nonboot CPUs")
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: Dengcheng Zhu <dzhu@wavecomp.com>
Cc: ralf@linux-mips.org
Cc: stable@vger.kernel.org # 4.20+
2019-01-14 13:51:03 -08:00
Jason Gunthorpe
d6f4a21f30 RDMA/uverbs: Mark ioctl responses with UVERBS_ATTR_F_VALID_OUTPUT
When the ioctl interface for the write commands was introduced it did
not mark the core response with UVERBS_ATTR_F_VALID_OUTPUT. This causes
rdma-core in userspace to not mark the buffers as written for valgrind.

Along the same lines it turns out we have always missed marking the driver
data. Fixing both of these makes valgrind work properly with rdma-core and
ioctl.

Fixes: 4785860e04 ("RDMA/uverbs: Implement an ioctl that can call write and write_ex handlers")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
2019-01-14 14:02:22 -07:00
Nicholas Kazlauskas
ae1cf20df7 drm/amd/display: Fix disabled cursor on top screen edge
[Why]
The cursor vanishes when touching the top of edge of the screen for
Raven on Linux.

This occurs because the cursor height is not taken into account when
deciding to disable the cursor.

[How]
Factor in the cursor height into the cursor calculations - and mimic
the existing x position calculations.

Fixes: 94a4ffd1d4 ("drm/amd/display: fix PIP bugs on Dal3")

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-14 16:01:52 -05:00
Roman Li
f5c412ac59 drm/amd/display: fix warning on raven hotplug
[Why]
Hotplug on raven results in REG_WAIT_TIMEOUT warning
due to failing attempt to lock disabled otg for the hubp
interdependent pipes programming.

[How]
Don't setup pipe interdependencies for disabled otg.
Also removed the unnecessary duplicate logic checks.

Signed-off-by: Roman Li <Roman.Li@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-14 16:01:32 -05:00
Charlene Liu
20300db4ae drm/amd/display: fix PME notification not working in RV desktop
[Why]
PPLIB not receive the PME when unplug.

Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Chris Park <Chris.Park@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-14 16:01:06 -05:00
Nicholas Kazlauskas
dddce8b490 drm/amd/display: Only get the connector state for VRR when toggled
[Why]
This fixes a stuttering issue that occurs when moving a hardware cursor
when VRR is enabled.

Previously when VRR is enabled atomic check will grab the connector
state for every atomic update. This has to lock the connector in order
to do so. The locking is bad enough by itself for performance, but
it gets worse with what we do just below that - add all the planes
for the CRTC to the commit.

This prevents the cursor fast path from working - there's more than one
plane now. With state->allow_modeset = true on top of this, it also
adds and removes all the planes from the DC context triggering a full
(very slow) update in DC.

[How]
We need the connector state to get the VRR min/max capbilities, but we
only need them when there's a CRTC mode change or when VRR is toggled.

The condition has been updated accordingly.

Fixes: 3cc22f281318 ("drm/amdgpu: Set FreeSync state using drm VRR properties")

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-14 16:00:46 -05:00
Josip Pavic
099139bef0 drm/amd/display: Pack DMCU iRAM alignment
[Why]
When the DMCU's iRAM definition was moved to the newly created
power_helpers, a #pragma pack was lost, causing the iRAM to be misaligned

[How]
Restore the #pragma pack

Signed-off-by: Josip Pavic <Josip.Pavic@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-14 16:00:17 -05:00
Kenneth Feng
a29b01a131 drm/amd/powerplay: run acg btc for Vega12
acg btc was added to Vega12

Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-14 16:00:04 -05:00
Felix Kuehling
bbdf514fe5 drm/amdkfd: Don't assign dGPUs to APU topology devices
dGPUs need their own topology devices. Don't assign them to APU topology
devices with CPU cores.

Bug: https://github.com/RadeonOpenCompute/ROCK-Kernel-Driver/issues/66
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Tested-by: Elias Konstantinidis <ekondis@gmail.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-14 15:59:50 -05:00
Felix Kuehling
d1c234e2cd drm/amdkfd: Allow building KFD on ARM64 (v2)
ifdef x86_64 specific code.
Allow enabling CONFIG_HSA_AMD on ARM64.

v2: Fixed a compiler warning due to an unused variable

CC: Mark Nutter <Mark.Nutter@arm.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Tested-by: Mark Nutter <Mark.Nutter@arm.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-01-14 15:59:37 -05:00
Steven Rostedt (VMware)
3719876809 sbitmap: Protect swap_lock from softirqs
The swap_lock used by sbitmap has a chain with locks taken from softirq,
but the swap_lock is not protected from being preempted by softirqs.

A chain exists of:

 sbq->ws[i].wait -> dispatch_wait_lock -> swap_lock

Where the sbq->ws[i].wait lock can be taken from softirq context, which
means all locks below it in the chain must also be protected from
softirqs.

Reported-by: Clark Williams <williams@redhat.com>
Fixes: 58ab5e32e6 ("sbitmap: silence bogus lockdep IRQ warning")
Fixes: ea86ea2cdc ("sbitmap: amortize cost of clearing bits")
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-01-15 07:31:18 +12:00
Linus Torvalds
c962cb323e GPIO fixes for the v5.0 series:
- Get rid of some WARN_ON() from the ACPI code
 - Staticize a symbol
 - Fix MMC polarity detection
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Merge tag 'gpio-v5.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "The patch hitting the MMC/SD subsystem is fixing up my own mess when
  moving semantics from MMC/SD over to gpiolib. Ulf is on vacation but I
  managed to reach him on chat and obtain his ACK.

  The other two are early-rc fixes that are not super serious but pretty
  annoying so I'd like to get rid of them.

  Summary:

   - Get rid of some WARN_ON() from the ACPI code

   - Staticize a symbol

   - Fix MMC polarity detection"

* tag 'gpio-v5.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  mmc: core: don't override the CD GPIO level when "cd-inverted" is set
  gpio: pca953x: Make symbol 'pca953x_i2c_regmap' static
  gpiolib-acpi: Remove unnecessary WARN_ON from acpi_gpiochip_free_interrupts
2019-01-15 06:26:28 +12:00
Linus Torvalds
9deb9e1637 - New Device Support
- Add support for Power Supply to AXP813
    - Add support for GPIO, ADC, AC and Battery Power Supply to AXP803
    - Add support for UART to Exynos LPASS
 
  - Fix-ups
    - Use supplied MACROS; ti_am335x_tscadc
    - Trivial spelling/whitespace/alignment; tmio, axp20x, rave-sp
    - Regmap changes; bd9571mwv, wm5110-tables
    - Kconfig dependencies; MFD_AT91_USART
    - Supply shared data for child-devices; madera-core
    - Use new of_node_name_eq() API call; max77620, stmpe
    - Use managed resources (devm_*); tps65218
    - Comment descriptions; ingenic-tcu
    - Coding style; madera-core
 
  - Bug Fixes
    - Fix section mismatches; twl-core, db8500-prcmu
    - Correct error path related issues; mt6397-core, ab8500-core, mc13xxx-core
    - IRQ related fixes; tps6586x
    - Ensure proper initialisation sequence; qcom_rpm
    - Repair potential memory leak; cros_ec_dev
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Merge tag 'mfd-next-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD updates from Lee Jones:
 "New Device Support
   - Add support for Power Supply to AXP813
   - Add support for GPIO, ADC, AC and Battery Power Supply to AXP803
   - Add support for UART to Exynos LPASS

  Fix-ups:
   - Use supplied MACROS; ti_am335x_tscadc
   - Trivial spelling/whitespace/alignment; tmio, axp20x, rave-sp
   - Regmap changes; bd9571mwv, wm5110-tables
   - Kconfig dependencies; MFD_AT91_USART
   - Supply shared data for child-devices; madera-core
   - Use new of_node_name_eq() API call; max77620, stmpe
   - Use managed resources (devm_*); tps65218
   - Comment descriptions; ingenic-tcu
   - Coding style; madera-core

  Bug Fixes:
   - Fix section mismatches; twl-core, db8500-prcmu
   - Correct error path related issues; mt6397-core, ab8500-core, mc13xxx-core
   - IRQ related fixes; tps6586x
   - Ensure proper initialisation sequence; qcom_rpm
   - Repair potential memory leak; cros_ec_dev"

* tag 'mfd-next-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (25 commits)
  mfd: exynos-lpass: Enable UART module support
  mfd: mc13xxx: Fix a missing check of a register-read failure
  mfd: cros_ec: Add commands to control codec
  mfd: madera: Remove spurious semicolon in while loop
  mfd: rave-sp: Fix typo in rave_sp_checksum comment
  mfd: ingenic-tcu: Fix bit field description in header
  mfd: tps65218: Use devm_regmap_add_irq_chip and clean up error path in probe()
  mfd: Use of_node_name_eq() for node name comparisons
  mfd: cros_ec_dev: Add missing mfd_remove_devices() call in remove
  mfd: axp20x: Add supported cells for AXP803
  mfd: axp20x: Re-align MFD cell entries
  mfd: axp20x: Add AC power supply cell for AXP813
  mfd: wm5110: Add missing ASRC rate register
  mfd: qcom_rpm: write fw_version to CTRL_REG
  mfd: tps6586x: Handle interrupts on suspend
  mfd: madera: Add shared data for accessory detection
  mfd: at91-usart: Add platform dependency
  mfd: bd9571mwv: Add volatile register to make DVFS work
  mfd: ab8500-core: Return zero in get_register_interruptible()
  mfd: tmio: Typo s/use use/use/
  ...
2019-01-15 06:24:36 +12:00
Linus Torvalds
3a73e73a10 - Fix-ups
- Use new of_node_name_eq() API call;
 
  - Bug Fixes
    - Internally track 'enabled' state; pwm_bl
    - Fix auto-generated brightness tables parsed by DT; pwm_bl
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Merge tag 'backlight-next-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight

Pull backlight updates from Lee Jones:
 "Fix-ups:
   - Use new of_node_name_eq() API call

  Bug Fixes:
   - Internally track 'enabled' state in pwm_bl
   - Fix auto-generated pwm_bl brightness tables parsed by DT

* tag 'backlight-next-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
  backlight: 88pm860x_bl: Use of_node_name_eq for node name comparisons
  backlight: pwm_bl: Fix devicetree parsing with auto-generated brightness tables
  backlight: pwm_bl: Re-add driver internal enabled tracking
2019-01-15 06:21:10 +12:00
Julia Lawall
f672b93e4a drm/meson: add missing of_node_put
Add an of_node_put when the result of of_graph_get_remote_port_parent is
not available.

An of_node_put is also needed when meson_probe_remote completes.  This was
present at the recursive call, but not in the call from meson_drv_probe.

The semantic match that finds this problem is as follows
(http://coccinelle.lip6.fr):

// <smpl>
@r exists@
local idexpression e;
expression x;
@@
e = of_graph_get_remote_port_parent(...);
... when != x = e
    when != true e == NULL
    when != of_node_put(e)
    when != of_fwnode_handle(e)
(
return e;
|
*return ...;
)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1547372691-28324-4-git-send-email-Julia.Lawall@lip6.fr
2019-01-14 16:36:43 +01:00
Talons Lee
5268c8f39e always clear the X2APIC_ENABLE bit for PV guest
Commit e657fcc clears cpu capability bit instead of using fake cpuid
value, the EXTD should always be off for PV guest without depending
on cpuid value. So remove the cpuid check in xen_read_msr_safe() to
always clear the X2APIC_ENABLE bit.

Signed-off-by: Talons Lee <xin.li@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2019-01-14 09:00:32 -05:00