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| author | Greg Kroah-Hartman <gregkh@google.com> | 2017-09-07 10:17:02 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2017-09-07 10:17:02 +0200 |
| commit | a8935c98cf97201e9ee50f22a27264a3220c82e8 (patch) | |
| tree | 74b97b59080411d7d49a057d908a8278f71ea709 /arch/arm/kvm/mmu.c | |
| parent | 1bab88a22447c96f832aca1115370cfdd75fb168 (diff) | |
| parent | 573b59e17e37fc19577630391c08f7b1e26609d8 (diff) | |
Merge 4.4.87 into android-4.4
Changes in 4.4.87
irqchip: mips-gic: SYNC after enabling GIC region
i2c: ismt: Don't duplicate the receive length for block reads
i2c: ismt: Return EMSGSIZE for block reads with bogus length
ceph: fix readpage from fscache
cpumask: fix spurious cpumask_of_node() on non-NUMA multi-node configs
cpuset: Fix incorrect memory_pressure control file mapping
alpha: uapi: Add support for __SANE_USERSPACE_TYPES__
CIFS: Fix maximum SMB2 header size
CIFS: remove endian related sparse warning
wl1251: add a missing spin_lock_init()
xfrm: policy: check policy direction value
drm/ttm: Fix accounting error when fail to get pages for pool
kvm: arm/arm64: Fix race in resetting stage2 PGD
kvm: arm/arm64: Force reading uncached stage2 PGD
epoll: fix race between ep_poll_callback(POLLFREE) and ep_free()/ep_remove()
crypto: algif_skcipher - only call put_page on referenced and used pages
Linux 4.4.87
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'arch/arm/kvm/mmu.c')
| -rw-r--r-- | arch/arm/kvm/mmu.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c index ba079e279b58..e8835d4e173c 100644 --- a/arch/arm/kvm/mmu.c +++ b/arch/arm/kvm/mmu.c @@ -824,24 +824,25 @@ void stage2_unmap_vm(struct kvm *kvm) * Walks the level-1 page table pointed to by kvm->arch.pgd and frees all * underlying level-2 and level-3 tables before freeing the actual level-1 table * and setting the struct pointer to NULL. - * - * Note we don't need locking here as this is only called when the VM is - * destroyed, which can only be done once. */ void kvm_free_stage2_pgd(struct kvm *kvm) { - if (kvm->arch.pgd == NULL) - return; + void *pgd = NULL; + void *hwpgd = NULL; spin_lock(&kvm->mmu_lock); - unmap_stage2_range(kvm, 0, KVM_PHYS_SIZE); + if (kvm->arch.pgd) { + unmap_stage2_range(kvm, 0, KVM_PHYS_SIZE); + pgd = READ_ONCE(kvm->arch.pgd); + hwpgd = kvm_get_hwpgd(kvm); + kvm->arch.pgd = NULL; + } spin_unlock(&kvm->mmu_lock); - kvm_free_hwpgd(kvm_get_hwpgd(kvm)); - if (KVM_PREALLOC_LEVEL > 0) - kfree(kvm->arch.pgd); - - kvm->arch.pgd = NULL; + if (hwpgd) + kvm_free_hwpgd(hwpgd); + if (KVM_PREALLOC_LEVEL > 0 && pgd) + kfree(pgd); } static pud_t *stage2_get_pud(struct kvm *kvm, struct kvm_mmu_memory_cache *cache, |