Marcelo Tosatti wrote:
Skip syncing global pages on cr3 switch (but not on cr4/cr0). This is
important for Linux 32-bit guests with PAE, where the kmap page is
marked as global.
Patch is good, but won't apply without the first.
{
u64 spte;
int ret = 0;
u64 mt_mask = shadow_mt_mask;
+ struct kvm_mmu_page *sp = page_header(__pa(shadow_pte));
+
+ if (!global && sp->global) {
+ sp->global = 0;
A slight deficiency in this approach is that a page can't transition
from !global to global. I don't think this is frequent, so we don't
need to deal with it. But a more accurate approach is to keep a count
of non-global present mappings, and to activate the global logic when
this count is nonzero.
--
error compiling committee.c: too many arguments to function
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