[v3,0/2] x86/pv: Alternative XSA-286 fix

Message

Andrew Cooper Oct. 27, 2020, 2:10 p.m. UTC

Alternative XSA-286 fix, with far less of a performance hit.

v3:
 * Split into two patches, to try and make the TLB flushing in do_mmu_update()
   a tractable problem to solve.

Andrew Cooper (2):
  x86/pv: Drop FLUSH_TLB_GLOBAL in do_mmu_update() for XPTI
  x86/pv: Flush TLB in response to paging structure changes

 xen/arch/x86/mm.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 59 insertions(+), 10 deletions(-)