4 files changed, 76 insertions, 1 deletions

diff --git a/hw/spapr_vio.c b/hw/spapr_vio.c
index 35818e18f1..1da3032215 100644
--- a/hw/spapr_vio.c
+++ b/hw/spapr_vio.c
@@ -165,7 +165,13 @@ static void rtce_init(VIOsPAPRDevice *dev)
         * sizeof(VIOsPAPR_RTCE);
 
     if (size) {
-        dev->rtce_table = g_malloc0(size);
+        dev->rtce_table = kvmppc_create_spapr_tce(dev->reg,
+                                                  dev->rtce_window_size,
+                                                  &dev->kvmtce_fd);
+
+        if (!dev->rtce_table) {
+            dev->rtce_table = g_malloc0(size);
+        }
     }
 }
 
diff --git a/hw/spapr_vio.h b/hw/spapr_vio.h
index 4fe5f742c2..a325a5f4b3 100644
--- a/hw/spapr_vio.h
+++ b/hw/spapr_vio.h
@@ -57,6 +57,7 @@ typedef struct VIOsPAPRDevice {
     target_ulong signal_state;
     uint32_t rtce_window_size;
     VIOsPAPR_RTCE *rtce_table;
+    int kvmtce_fd;
     VIOsPAPR_CRQ crq;
 } VIOsPAPRDevice;
 
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index fd17d23d2e..06cad41de5 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -28,6 +28,7 @@
 #include "kvm_ppc.h"
 #include "cpu.h"
 #include "device_tree.h"
+#include "hw/sysbus.h"
 #include "hw/spapr.h"
 
 #include "hw/sysbus.h"
@@ -56,6 +57,7 @@ static int cap_segstate;
 static int cap_booke_sregs;
 static int cap_ppc_smt;
 static int cap_ppc_rma;
+static int cap_spapr_tce;
 
 /* XXX We have a race condition where we actually have a level triggered
  *     interrupt, but the infrastructure can't expose that yet, so the guest
@@ -81,6 +83,7 @@ int kvm_arch_init(KVMState *s)
     cap_booke_sregs = kvm_check_extension(s, KVM_CAP_PPC_BOOKE_SREGS);
     cap_ppc_smt = kvm_check_extension(s, KVM_CAP_PPC_SMT);
     cap_ppc_rma = kvm_check_extension(s, KVM_CAP_PPC_RMA);
+    cap_spapr_tce = kvm_check_extension(s, KVM_CAP_SPAPR_TCE);
 
     if (!cap_interrupt_level) {
         fprintf(stderr, "KVM: Couldn't find level irq capability. Expect the "
@@ -802,6 +805,57 @@ off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem)
     return size;
 }
 
+void *kvmppc_create_spapr_tce(uint32_t liobn, uint32_t window_size, int *pfd)
+{
+    struct kvm_create_spapr_tce args = {
+        .liobn = liobn,
+        .window_size = window_size,
+    };
+    long len;
+    int fd;
+    void *table;
+
+    if (!cap_spapr_tce) {
+        return NULL;
+    }
+
+    fd = kvm_vm_ioctl(kvm_state, KVM_CREATE_SPAPR_TCE, &args);
+    if (fd < 0) {
+        return NULL;
+    }
+
+    len = (window_size / SPAPR_VIO_TCE_PAGE_SIZE) * sizeof(VIOsPAPR_RTCE);
+    /* FIXME: round this up to page size */
+
+    table = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0);
+    if (table == MAP_FAILED) {
+        close(fd);
+        return NULL;
+    }
+
+    *pfd = fd;
+    return table;
+}
+
+int kvmppc_remove_spapr_tce(void *table, int fd, uint32_t window_size)
+{
+    long len;
+
+    if (fd < 0) {
+        return -1;
+    }
+
+    len = (window_size / SPAPR_VIO_TCE_PAGE_SIZE)*sizeof(VIOsPAPR_RTCE);
+    if ((munmap(table, len) < 0) ||
+        (close(fd) < 0)) {
+        fprintf(stderr, "KVM: Unexpected error removing KVM SPAPR TCE "
+                "table: %s", strerror(errno));
+        /* Leak the table */
+    }
+
+    return 0;
+}
+
 bool kvm_arch_stop_on_emulation_error(CPUState *env)
 {
     return true;
diff --git a/target-ppc/kvm_ppc.h b/target-ppc/kvm_ppc.h
index 82f32f449e..87d1bdd5fd 100644
--- a/target-ppc/kvm_ppc.h
+++ b/target-ppc/kvm_ppc.h
@@ -22,6 +22,8 @@ int kvmppc_set_interrupt(CPUState *env, int irq, int level);
 void kvmppc_set_papr(CPUState *env);
 int kvmppc_smt_threads(void);
 off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem);
+void *kvmppc_create_spapr_tce(uint32_t liobn, uint32_t window_size, int *pfd);
+int kvmppc_remove_spapr_tce(void *table, int pfd, uint32_t window_size);
 
 #else
 
@@ -59,6 +61,18 @@ static inline off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem)
     return 0;
 }
 
+static inline void *kvmppc_create_spapr_tce(uint32_t liobn,
+                                            uint32_t window_size, int *fd)
+{
+    return NULL;
+}
+
+static inline int kvmppc_remove_spapr_tce(void *table, int pfd,
+                                          uint32_t window_size)
+{
+    return -1;
+}
+
 #endif
 
 #ifndef CONFIG_KVM