[Xen-changelog] [xen staging] x86/shadow: emulate_gva_to_mfn() should respect p2m_ioreq_server

[p***@xen.org]

commit 2190c8160a802560029d5d260d5f6979302b53d0
Author: Jan Beulich <***@suse.com>
AuthorDate: Thu Nov 15 16:43:36 2018 +0100
Commit: Jan Beulich <***@suse.com>
CommitDate: Thu Nov 15 16:43:36 2018 +0100

x86/shadow: emulate_gva_to_mfn() should respect p2m_ioreq_server

Writes to such pages need to be handed to the emulator.

Signed-off-by: Jan Beulich <***@suse.com>
Reviewed-by: Paul Durrant <***@citrix.com>
Acked-by: Andrew Cooper <***@citrix.com>
Acked-by: Tim Deegan <***@xen.org>
---
xen/arch/x86/mm/shadow/hvm.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/xen/arch/x86/mm/shadow/hvm.c b/xen/arch/x86/mm/shadow/hvm.c
index 4cc75916b8..8994cb9f87 100644
--- a/xen/arch/x86/mm/shadow/hvm.c
+++ b/xen/arch/x86/mm/shadow/hvm.c
@@ -338,6 +338,11 @@ static mfn_t emulate_gva_to_mfn(struct vcpu *v, unsigned long vaddr,
{
return _mfn(BAD_GFN_TO_MFN);
}
+ if ( p2mt == p2m_ioreq_server )
+ {
+ put_page(page);
+ return _mfn(BAD_GFN_TO_MFN);
+ }
if ( p2m_is_discard_write(p2mt) )
{
put_page(page);
--
generated by git-patchbot for /home/xen/git/xen.git#staging