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KVM: MMU: Don't read pdptrs with mmu spinlock held in mmu_alloc_roots
authorAvi Kivity <avi@redhat.com>
Tue, 4 May 2010 09:58:32 +0000 (12:58 +0300)
committerGreg Kroah-Hartman <gregkh@suse.de>
Mon, 5 Jul 2010 18:16:14 +0000 (11:16 -0700)
commit01b2090b73c8364b457d4c8d0961db2d1635726a
tree9a15318ae38a9130b9fab652783709a90f24aaf2tree | snapshot
parent5c8f6e37b6b7ce451bb3fc25a7699c720bbcbbbacommit | diff
KVM: MMU: Don't read pdptrs with mmu spinlock held in mmu_alloc_roots

On svm, kvm_read_pdptr() may require reading guest memory, which can sleep.

Push the spinlock into mmu_alloc_roots(), and only take it after we've read
the pdptr.

Tested-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
(cherry picked from commit 8facbbff071ff2b19268d3732e31badc60471e21)
arch/x86/kvm/mmu.c diff | blob | history
Linux kernels and configurations used by Zygo.