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author | Paolo Bonzini <pbonzini@redhat.com> | 2015-05-18 13:03:39 (GMT) |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-06-05 15:26:37 (GMT) |
commit | 699023e239658e62da6f42f47d31b54788521ec1 (patch) | |
tree | 01dcd8c0ad2100dc1c8a4834358a0fb0d2f0fa1c /Documentation/virtual | |
parent | 9da0e4d5ac969909f6b435ce28ea28135a9cbd69 (diff) | |
download | linux-699023e239658e62da6f42f47d31b54788521ec1.tar.xz |
KVM: x86: add SMM to the MMU role, support SMRAM address space
This is now very simple to do. The only interesting part is a simple
trick to find the right memslot in gfn_to_rmap, retrieving the address
space from the spte role word. The same trick is used in the auditing
code.
The comment on top of union kvm_mmu_page_role has been stale forever,
so remove it. Speaking of stale code, remove pad_for_nice_hex_output
too: it was splitting the "access" bitfield across two bytes and thus
had effectively turned into pad_for_ugly_hex_output.
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Documentation/virtual')
-rw-r--r-- | Documentation/virtual/kvm/mmu.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/mmu.txt b/Documentation/virtual/kvm/mmu.txt index c59bd9b..3a4d681 100644 --- a/Documentation/virtual/kvm/mmu.txt +++ b/Documentation/virtual/kvm/mmu.txt @@ -173,6 +173,12 @@ Shadow pages contain the following information: Contains the value of cr4.smap && !cr0.wp for which the page is valid (pages for which this is true are different from other pages; see the treatment of cr0.wp=0 below). + role.smm: + Is 1 if the page is valid in system management mode. This field + determines which of the kvm_memslots array was used to build this + shadow page; it is also used to go back from a struct kvm_mmu_page + to a memslot, through the kvm_memslots_for_spte_role macro and + __gfn_to_memslot. gfn: Either the guest page table containing the translations shadowed by this page, or the base page frame for linear translations. See role.direct. |