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author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2017-04-03 15:12:43 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-27 09:09:33 +0200 |
commit | 2a60bb635236ead6437b37a5b4085da1e33962b1 (patch) | |
tree | b88ae15a3c6ef7a447fc8cbc5b74c836e9a8a5b2 /tools | |
parent | e2587fba99118f2f4506b37b4766d7a4cca1465e (diff) |
kvm: arm/arm64: Fix locking for kvm_free_stage2_pgd
commit 8b3405e345b5a098101b0c31b264c812bba045d9 upstream.
In kvm_free_stage2_pgd() we don't hold the kvm->mmu_lock while calling
unmap_stage2_range() on the entire memory range for the guest. This could
cause problems with other callers (e.g, munmap on a memslot) trying to
unmap a range. And since we have to unmap the entire Guest memory range
holding a spinlock, make sure we yield the lock if necessary, after we
unmap each PUD range.
Fixes: commit d5d8184d35c9 ("KVM: ARM: Memory virtualization setup")
Cc: Paolo Bonzini <pbonzin@redhat.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
[ Avoid vCPU starvation and lockup detector warnings ]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions