@@ -2017,6 +2017,7 @@ static Property vtd_properties[] = {
DEFINE_PROP_ON_OFF_AUTO("eim", IntelIOMMUState, intr_eim,
ON_OFF_AUTO_AUTO),
DEFINE_PROP_BOOL("x-buggy-eim", IntelIOMMUState, buggy_eim, false),
+ DEFINE_PROP_BOOL("cache-mode", IntelIOMMUState, cache_mode_enabled, FALSE),
DEFINE_PROP_END_OF_LIST(),
};
@@ -2391,6 +2392,10 @@ static void vtd_init(IntelIOMMUState *s)
assert(s->intr_eim != ON_OFF_AUTO_AUTO);
}
+ if (s->cache_mode_enabled) {
+ s->cap |= VTD_CAP_CM;
+ }
+
vtd_reset_context_cache(s);
vtd_reset_iotlb(s);
@@ -201,6 +201,7 @@
#define VTD_CAP_MAMV (VTD_MAMV << 48)
#define VTD_CAP_PSI (1ULL << 39)
#define VTD_CAP_SLLPS ((1ULL << 34) | (1ULL << 35))
+#define VTD_CAP_CM (1ULL << 7)
/* Supported Adjusted Guest Address Widths */
#define VTD_CAP_SAGAW_SHIFT 8
@@ -258,6 +258,8 @@ struct IntelIOMMUState {
uint8_t womask[DMAR_REG_SIZE]; /* WO (write only - read returns 0) */
uint32_t version;
+ bool cache_mode_enabled; /* RO - is cap CM enabled? */
+
dma_addr_t root; /* Current root table pointer */
bool root_extended; /* Type of root table (extended or not) */
bool dmar_enabled; /* Set if DMA remapping is enabled */