Merge remote-tracking branch 'sstabellini/tags/xen-20161122-tag' into staging

[mirror_qemu.git] / xen-hvm.c

diff --git a/xen-hvm.c b/xen-hvm.c
index 3b0343a8e6f8c1f64df7b03be6529c71903431aa..99b8ee8a4f367ec8e8a4299e017d54b6dd340305 100644 (file)
--- a/xen-hvm.c
+++ b/xen-hvm.c
@@ -810,6 +810,10 @@ static void cpu_ioreq_pio(ioreq_t *req)
     trace_cpu_ioreq_pio(req, req->dir, req->df, req->data_is_ptr, req->addr,
                          req->data, req->count, req->size);
 
+    if (req->size > sizeof(uint32_t)) {
+        hw_error("PIO: bad size (%u)", req->size);
+    }
+
     if (req->dir == IOREQ_READ) {
         if (!req->data_is_ptr) {
             req->data = do_inp(req->addr, req->size);
@@ -846,6 +850,10 @@ static void cpu_ioreq_move(ioreq_t *req)
     trace_cpu_ioreq_move(req, req->dir, req->df, req->data_is_ptr, req->addr,
                          req->data, req->count, req->size);
 
+    if (req->size > sizeof(req->data)) {
+        hw_error("MMIO: bad size (%u)", req->size);
+    }
+
     if (!req->data_is_ptr) {
         if (req->dir == IOREQ_READ) {
             for (i = 0; i < req->count; i++) {
@@ -1010,11 +1018,13 @@ static int handle_buffered_iopage(XenIOState *state)
         req.df = 1;
         req.type = buf_req->type;
         req.data_is_ptr = 0;
+        xen_rmb();
         qw = (req.size == 8);
         if (qw) {
             buf_req = &buf_page->buf_ioreq[(rdptr + 1) %
                                            IOREQ_BUFFER_SLOT_NUM];
             req.data |= ((uint64_t)buf_req->data) << 32;
+            xen_rmb();
         }
 
         handle_ioreq(state, &req);
@@ -1045,7 +1055,11 @@ static void cpu_handle_ioreq(void *opaque)
 
     handle_buffered_iopage(state);
     if (req) {
-        handle_ioreq(state, req);
+        ioreq_t copy = *req;
+
+        xen_rmb();
+        handle_ioreq(state, &copy);
+        req->data = copy.data;
 
         if (req->state != STATE_IOREQ_INPROCESS) {
             fprintf(stderr, "Badness in I/O request ... not in service?!: "
@@ -1203,11 +1217,7 @@ void xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory)
         goto err;
     }
 
-    rc = xen_create_ioreq_server(xen_xc, xen_domid, &state->ioservid);
-    if (rc < 0) {
-        perror("xen: ioreq server create");
-        goto err;
-    }
+    xen_create_ioreq_server(xen_xc, xen_domid, &state->ioservid);
 
     state->exit.notify = xen_exit_notifier;
     qemu_add_exit_notifier(&state->exit);
@@ -1320,6 +1330,10 @@ void xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory)
     }
     xen_be_register_common();
     xen_read_physmap(state);
+
+    /* Disable ACPI build because Xen handles it */
+    pcms->acpi_build_enabled = false;
+
     return;
 
 err: