diff options
| -rw-r--r-- | OvmfPkg/Library/BaseMemEncryptSevLib/X64/SnpPageStateChangeInternal.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SnpPageStateChangeInternal.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SnpPageStateChangeInternal.c index bcc0798d6b..f1883239a6 100644 --- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SnpPageStateChangeInternal.c +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SnpPageStateChangeInternal.c @@ -145,6 +145,7 @@ BuildPageStateBuffer ( UINTN RmpPageSize;
UINTN Index;
UINTN IndexMax;
+ UINTN PscIndexMax;
// Clear the page state structure
SetMem (Info, InfoSize, 0);
@@ -154,6 +155,16 @@ BuildPageStateBuffer ( NextAddress = EndAddress;
//
+ // Make the use of the work area as efficient as possible relative to
+ // exiting from the guest to the hypervisor. Maximize the number of entries
+ // that can be processed per exit.
+ //
+ PscIndexMax = (IndexMax / SNP_PAGE_STATE_MAX_ENTRY) * SNP_PAGE_STATE_MAX_ENTRY;
+ if (PscIndexMax > 0) {
+ IndexMax = MIN (IndexMax, PscIndexMax);
+ }
+
+ //
// Populate the page state entry structure
//
while ((BaseAddress < EndAddress) && (Index < IndexMax)) {
|