iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Fix for AMD processors.

Browse Source 
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.13 (GNU/Linux)
 
 iQIcBAABAgAGBQJR6Wm5AAoJEBvWZb6bTYbykGQP/Rg4fF+p7v8eko9dNKJWAqfq
 /RQ9mSIRKpwD+kZogPtrBNH/LKwSqaJCtciSp57d+cD9w/9S1pN7eu1nDwSl2RA6
 EyOVJ/Pd4JCdaRj+yGA3cjs7tEN3SvDk1BHHAxq830ZS5ekuXRw2QC+gBC2hI/Zq
 g442m2ELckcdQXwFcj+FuK4usxhkOL7MT5L64lBF962bAY87L7VL0XkFq9RZCp1B
 mJJd5uAok7gNl4LHH/Gu5DbuQTvY33ijJiGl9lT0CXwP9bmZ0WTA9lR2poy8P7eM
 R6qBuXaHN4qBm7tdRqPBsQ+S1+yr+JHRTCzYU7UsiXWg/fxu1QX2L77Q8ZbjnhNW
 rnKOSVlc3j11b594ygX9uc5Elgr2cl9OBBFdoDDormBo9A3Kp9pGkjbJnl1tunPi
 oA4Otx8GwxNsnL7aBWXEoPm70peQFDOAKNK+5p/PBasXsJrGCSqCc2x2+RpaveqR
 HhE2z0eMaCpC8ayPofMsP0nIu/Cf53m2Fr6BHZqea2KBz57WAhXOuSe4vzXm3nXg
 xBHBpPoNtBzTYjmWJ7vdlLGgzsMkZTOsRmppQT7wwrwGEjFCOV4kwHWOBsxNS5Z8
 4eWyRFPLJP4dGRj2FoMZNfMM7/6XpQz5JttzxHXWwpua+AnQ4+ay4A/6FxiNMm0a
 hRB9ev+0X2/9Qj3+GFIU
 =+0Dk
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fix from Paolo Bonzini:
 "This single patch fixes a regression caused by one of the
  optimizations introduced in 3.11, which is generally visible only on
  AMD processors"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: MMU: avoid fast page fault fixing mmio page fault
This commit is contained in:
Linus Torvalds 2013-07-19 10:17:12 -07:00
commit b8a33fc725
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/x86/kvm/mmu.c
View File

@ -2810,6 +2810,13 @@ exit:
static bool page_fault_can_be_fast(struct kvm_vcpu *vcpu, u32 error_code) static bool page_fault_can_be_fast(struct kvm_vcpu *vcpu, u32 error_code)
{ {
/*
* Do not fix the mmio spte with invalid generation number which
* need to be updated by slow page fault path.
*/
if (unlikely(error_code & PFERR_RSVD_MASK))
return false;
/* /*
* #PF can be fast only if the shadow page table is present and it * #PF can be fast only if the shadow page table is present and it
* is caused by write-protect, that means we just need change the * is caused by write-protect, that means we just need change the