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linux/arch/x86/kvm
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Marcelo Tosatti aa1346113c KVM: VMX: switch blocked_vcpu_on_cpu_lock to raw spinlock 
commit 5f02ef741a785678930f3ff0a8b6b2b0ef1bb402 upstream.

blocked_vcpu_on_cpu_lock is taken from hard interrupt context
(pi_wakeup_handler), therefore it cannot sleep.

Switch it to a raw spinlock.

Fixes:

[41297.066254] BUG: scheduling while atomic: CPU 0/KVM/635218/0x00010001
[41297.066323] Preemption disabled at:
[41297.066324] [<ffffffff902ee47f>] irq_enter_rcu+0xf/0x60
[41297.066339] Call Trace:
[41297.066342]  <IRQ>
[41297.066346]  dump_stack_lvl+0x34/0x44
[41297.066353]  ? irq_enter_rcu+0xf/0x60
[41297.066356]  __schedule_bug.cold+0x7d/0x8b
[41297.066361]  __schedule+0x439/0x5b0
[41297.066365]  ? task_blocks_on_rt_mutex.constprop.0.isra.0+0x1b0/0x440
[41297.066369]  schedule_rtlock+0x1e/0x40
[41297.066371]  rtlock_slowlock_locked+0xf1/0x260
[41297.066374]  rt_spin_lock+0x3b/0x60
[41297.066378]  pi_wakeup_handler+0x31/0x90 [kvm_intel]
[41297.066388]  sysvec_kvm_posted_intr_wakeup_ipi+0x9d/0xd0
[41297.066392]  </IRQ>
[41297.066392]  asm_sysvec_kvm_posted_intr_wakeup_ipi+0x12/0x20
...

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-01-27 10:53:40 +01:00
..
mmu
KVM: X86: Use vcpu->arch.walk_mmu for kvm_mmu_invlpg()
2021-12-08 09:03:22 +01:00
svm
KVM: x86/pmu: Fix reserved bits for AMD PerfEvtSeln register
2021-12-08 09:03:27 +01:00
vmx
KVM: VMX: switch blocked_vcpu_on_cpu_lock to raw spinlock
2022-01-27 10:53:40 +01:00
cpuid.c
KVM: x86/pmu: Clear anythread deprecated bit when 0xa leaf is unsupported on the SVM
2021-07-28 14:35:34 +02:00
cpuid.h
KVM: x86: reinstate vendor-agnostic check on SPEC_CTRL cpuid bits
2020-12-30 11:54:14 +01:00
debugfs.c
KVM: let kvm_destroy_vm_debugfs clean up vCPU debugfs directories
2020-06-04 11:00:54 -04:00
emulate.c
KVM: x86: Move RDPID emulation intercept to its own enum
2021-05-19 10:13:16 +02:00
hyperv.c
KVM: x86: Ignore sparse banks size for an "all CPUs", non-sparse IPI req
2021-12-17 10:14:40 +01:00
hyperv.h
x86/kvm/hyper-v: Add support for synthetic debugger interface
2020-06-01 04:26:11 -04:00
i8254.c
kvm: i8254: remove redundant assignment to pointer s
2020-06-11 12:35:18 -04:00
i8254.h
…
i8259.c
KVM: x86: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks
2020-01-27 19:59:37 +01:00
ioapic.c
Revert "x86/kvm: fix vcpu-id indexed array sizes"
2021-11-12 14:58:32 +01:00
ioapic.h
Revert "x86/kvm: fix vcpu-id indexed array sizes"
2021-11-12 14:58:32 +01:00
irq_comm.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
irq.c
KVM: x86: Fix split-irqchip vs interrupt injection window request
2020-11-27 09:27:28 -05:00
irq.h
kvm/x86: Remove redundant function implementations
2020-05-27 13:11:10 -04:00
Kconfig
x86/kvm: hide KVM options from menuconfig when KVM is not compiled
2020-10-21 17:36:30 -04:00
kvm_cache_regs.h
KVM: x86: Let the guest own CR4.FSGSBASE
2020-10-21 17:48:50 -04:00
kvm_emulate.h
KVM: x86: Move RDPID emulation intercept to its own enum
2021-05-19 10:13:16 +02:00
lapic.c
kvm: LAPIC: Restore guard to prevent illegal APIC register access
2021-06-23 14:42:41 +02:00
lapic.h
KVM: nVMX: Morph notification vector IRQ on nested VM-Enter to pending PI
2020-09-28 07:57:22 -04:00
Makefile
kvm: x86/mmu: Init / Uninit the TDP MMU
2020-10-21 18:17:00 -04:00
mmu.h
KVM: x86: fix shift out of bounds reported by UBSAN
2021-01-12 20:18:26 +01:00
mtrr.c
KVM: x86: Protect MSR-based index computations in fixed_msr_to_seg_unit() from Spectre-v1/L1TF attacks
2020-01-27 19:59:39 +01:00
pmu.c
KVM/x86: pmu: Fix #GP condition check for RDPMC emulation
2020-07-09 07:08:37 -04:00
pmu.h
kvm: x86: limit the maximum number of vPMU fixed counters to 3
2020-07-08 16:21:59 -04:00
trace.h
KVM: x86: Ensure liveliness of nested VM-Enter fail tracepoint message
2021-06-16 12:01:46 +02:00
tss.h
…
x86.c
KVM: x86: remove PMU FIXED_CTR3 from msrs_to_save_all
2022-01-20 09:17:51 +01:00
x86.h
KVM: x86: Factor out x86 instruction emulation with decoding
2021-08-26 08:35:34 -04:00