OrgACRN
/
acrn-hypervisor
mirror of https://github.com/projectacrn/acrn-hypervisor.git
1
0
Fork 0
Code Issues Releases Wiki Activity

HV: PAE: Add stac()/clac() in local_gva2gpa_pae 

Accessing memory of guest will cause page fault when SMAP is enabled.
This patch stac()/clac() correspondingly to get rid of this situation.

Tracked-On: #2713
Signed-off-by: Kaige Fu <kaige.fu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Kaige Fu 2019-03-05 13:30:58 +00:00 committed by wenlingz
parent 18ba75248f
commit 2b74e1a91e
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
hypervisor/arch/x86/guest/guest_memory.c
View File

@ -215,7 +215,9 @@ static int32_t local_gva2gpa_pae(struct acrn_vcpu *vcpu, struct page_walk_info *
base = (uint64_t *)gpa2hva(vcpu->vm, addr);
if (base != NULL) {
index = (gva >> 30U) & 0x3UL;
stac();
entry = base[index];
clac();
if ((entry & PAGE_PRESENT) != 0U) {
pw_info->level = 2U;