AuxXxilium/linux_dsm_epyc7002
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34226b6b70
linux_dsm_epyc7002/arch
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Wanpeng Li 34226b6b70 KVM: X86: Fix setup the virt_spin_lock_key before static key get initialized 
static_key_disable_cpuslocked(): static key 'virt_spin_lock_key+0x0/0x20' used before call to jump_label_init()
 WARNING: CPU: 0 PID: 0 at kernel/jump_label.c:161 static_key_disable_cpuslocked+0x61/0x80
 RIP: 0010:static_key_disable_cpuslocked+0x61/0x80
 Call Trace:
  static_key_disable+0x16/0x20
  start_kernel+0x192/0x4b3
  secondary_startup_64+0xa5/0xb0

Qspinlock will be choosed when dedicated pCPUs are available, however, the
static virt_spin_lock_key is set in kvm_spinlock_init() before jump_label_init()
has been called, which will result in a WARN(). This patch fixes it by delaying
the virt_spin_lock_key setup to .smp_prepare_cpus().

Reported-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Fixes: b2798ba0b8 ("KVM: X86: Choose qspinlock when dedicated physical CPUs are available")
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2018-03-28 22:47:06 +02:00
..
alpha locking/xchg/alpha: Fix xchg() and cmpxchg() memory ordering bugs 2018-02-23 08:38:16 +01:00
arc ARC fixes for 4.16-rc4 2018-03-01 14:32:23 -08:00
arm KVM/ARM updates for v4.17 2018-03-28 16:09:09 +02:00
arm64 KVM/ARM updates for v4.17 2018-03-28 16:09:09 +02:00
blackfin unify {de,}mangle_poll(), get rid of kernel-side POLL... 2018-02-11 14:37:22 -08:00
c6x
cris bug.h: work around GCC PR82365 in BUG() 2018-02-21 15:35:43 -08:00
frv unify {de,}mangle_poll(), get rid of kernel-side POLL... 2018-02-11 14:37:22 -08:00
h8300
hexagon
ia64 bug.h: work around GCC PR82365 in BUG() 2018-02-21 15:35:43 -08:00
m32r
m68k bug.h: work around GCC PR82365 in BUG() 2018-02-21 15:35:43 -08:00
metag
microblaze
mips KVM: Introduce paravirtualization hints and KVM_HINTS_DEDICATED 2018-03-06 18:40:44 +01:00
mn10300
nios2 nios2 update for v4.16-rc1 2018-02-11 13:52:32 -08:00
openrisc
parisc Merge branch 'parisc-4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2018-03-02 13:05:20 -08:00
powerpc KVM: Introduce paravirtualization hints and KVM_HINTS_DEDICATED 2018-03-06 18:40:44 +01:00
riscv riscv/barrier: Define __smp_{mb,rmb,wmb} 2018-02-26 08:44:50 -08:00
s390 KVM: s390: fixes and features 2018-03-16 22:03:18 +01:00
score arch/score/kernel/setup.c: combine two seq_printf() calls into one call in show_cpuinfo() 2018-02-06 18:32:47 -08:00
sh sh: fix build error for empty CONFIG_BUILTIN_DTB_SOURCE 2018-03-02 09:20:55 +09:00
sparc bug.h: work around GCC PR82365 in BUG() 2018-02-21 15:35:43 -08:00
tile
um mconsole_proc(): don't mess with file->f_pos 2018-02-09 19:28:01 -08:00
unicore32 lib: optimize cpumask_next_and() 2018-02-06 18:32:44 -08:00
x86 KVM: X86: Fix setup the virt_spin_lock_key before static key get initialized 2018-03-28 22:47:06 +02:00
xtensa xtensa: support DMA buffers in high memory 2018-02-16 19:19:54 -08:00
.gitignore
Kconfig Makefile: introduce CONFIG_CC_STACKPROTECTOR_AUTO 2018-02-06 18:32:44 -08:00