KVM: load_pdptrs() cleanups

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load_pdptrs can be handed an invalid cr3, and it should not oops.
This can happen because we injected #gp in set_cr3() after we set
vcpu->cr3 to the invalid value, or from kvm_vcpu_ioctl_set_sregs(), or
memory configuration changes after the guest did set_cr3().

We should also copy the pdpte array once, before checking and
assigning, otherwise an SMP guest can potentially alter the values
between the check and the set.

Finally one nitpick: ret = 1 should be done as late as possible: this
allows GCC to check for unset "ret" should the function change in
future.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Avi Kivity <avi@qumranet.com>

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Rusty Russell 2007-07-25 13:29:51 +10:00 • committed by Avi Kivity

parent 3ccb8827fb

commit c820c2aa27

1 changed files with 12 additions and 10 deletions

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drivers/kvm/kvm_main.c

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