x86/kvm: Introduce kvm_(un)map_gfn()

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commit 1eff70a9ab upstream.

kvm_vcpu_(un)map operates on gfns from any current address space.
In certain cases we want to make sure we are not mapping SMRAM
and for that we can use kvm_(un)map_gfn() that we are introducing
in this patch.

This is part of CVE-2019-3016.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Boris Ostrovsky 2019-11-12 16:35:06 +00:00 • committed by Greg Kroah-Hartman

parent c6a896bb83

commit f6ad4449dd

2 changed files with 26 additions and 5 deletions

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include/linux/kvm_host.h

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