misc spice/qxl fixes.

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Merge remote-tracking branch 'remotes/spice/tags/pull-spice-20150304-1' into staging

misc spice/qxl fixes.

# gpg: Signature made Wed Mar  4 13:57:42 2015 GMT using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/spice/tags/pull-spice-20150304-1:
  hmp: info spice: take out webdav
  hmp: info spice: Show string channel name
  qxl: drop update_displaychangelistener call for secondary qxl devices
  vga: refactor vram_size clamping and rounding
  qxl: refactor rounding up to a nearest power of 2
  spice: fix invalid memory access to vga.vram
  qxl: document minimal video memory for new modes

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hmp.c

@@ -29,6 +29,10 @@
 #include "block/qapi.h"
 #include "qemu-io.h"
 
+#ifdef CONFIG_SPICE
+#include <spice/enums.h>
+#endif
+
 static void hmp_handle_error(Monitor *mon, Error **errp)
 {
     assert(errp);
@@ -545,6 +549,25 @@ void hmp_info_spice(Monitor *mon, const QDict *qdict)
 {
     SpiceChannelList *chan;
     SpiceInfo *info;
+    const char *channel_name;
+    const char * const channel_names[] = {
+        [SPICE_CHANNEL_MAIN] = "main",
+        [SPICE_CHANNEL_DISPLAY] = "display",
+        [SPICE_CHANNEL_INPUTS] = "inputs",
+        [SPICE_CHANNEL_CURSOR] = "cursor",
+        [SPICE_CHANNEL_PLAYBACK] = "playback",
+        [SPICE_CHANNEL_RECORD] = "record",
+        [SPICE_CHANNEL_TUNNEL] = "tunnel",
+        [SPICE_CHANNEL_SMARTCARD] = "smartcard",
+        [SPICE_CHANNEL_USBREDIR] = "usbredir",
+        [SPICE_CHANNEL_PORT] = "port",
+#if 0
+        /* minimum spice-protocol is 0.12.3, webdav was added in 0.12.7,
+         * no easy way to #ifdef (SPICE_CHANNEL_* is a enum).  Disable
+         * as quick fix for build failures with older versions. */
+        [SPICE_CHANNEL_WEBDAV] = "webdav",
+#endif
+    };
 
     info = qmp_query_spice(NULL);
 
@@ -581,6 +604,15 @@ void hmp_info_spice(Monitor *mon, const QDict *qdict)
                            chan->value->connection_id);
             monitor_printf(mon, "     channel: %" PRId64 ":%" PRId64 "\n",
                            chan->value->channel_type, chan->value->channel_id);
+
+            channel_name = "unknown";
+            if (chan->value->channel_type > 0 &&
+                chan->value->channel_type < ARRAY_SIZE(channel_names) &&
+                channel_names[chan->value->channel_type]) {
+                channel_name = channel_names[chan->value->channel_type];
+            }
+
+            monitor_printf(mon, "     channel name: %s\n", channel_name);
         }
     }
 

hw/display/qxl.c

@@ -120,9 +120,12 @@ static QXLMode qxl_modes[] = {
     QXL_MODE_EX(2560, 2048),
     QXL_MODE_EX(2800, 2100),
     QXL_MODE_EX(3200, 2400),
+    /* these modes need more than 32 MB video memory */
     QXL_MODE_EX(3840, 2160), /* 4k mainstream */
     QXL_MODE_EX(4096, 2160), /* 4k            */
+    /* these modes need more than 64 MB video memory */
     QXL_MODE_EX(7680, 4320), /* 8k mainstream */
+    /* these modes need more than 128 MB video memory */
     QXL_MODE_EX(8192, 4320), /* 8k            */
 };
 
@@ -297,19 +300,6 @@ void qxl_spice_reset_cursor(PCIQXLDevice *qxl)
     qxl->ssd.cursor = cursor_builtin_hidden();
 }
 
-
-static inline uint32_t msb_mask(uint32_t val)
-{
-    uint32_t mask;
-
-    do {
-        mask = ~(val - 1) & val;
-        val &= ~mask;
-    } while (mask < val);
-
-    return mask;
-}
-
 static ram_addr_t qxl_rom_size(void)
 {
     uint32_t required_rom_size = sizeof(QXLRom) + sizeof(QXLModes) +
@@ -367,6 +357,8 @@ static void init_qxl_rom(PCIQXLDevice *d)
     num_pages         -= surface0_area_size;
     num_pages          = num_pages / QXL_PAGE_SIZE;
 
+    assert(ram_header_size + surface0_area_size <= d->vga.vram_size);
+
     rom->draw_area_offset   = cpu_to_le32(0);
     rom->surface0_area_size = cpu_to_le32(surface0_area_size);
     rom->pages_offset       = cpu_to_le32(surface0_area_size);
@@ -1155,7 +1147,6 @@ static void qxl_soft_reset(PCIQXLDevice *d)
         qxl_enter_vga_mode(d);
     } else {
         d->mode = QXL_MODE_UNDEFINED;
-        update_displaychangelistener(&d->ssd.dcl, GUI_REFRESH_INTERVAL_IDLE);
     }
 }
 
@@ -1880,6 +1871,12 @@ static void qxl_init_ramsize(PCIQXLDevice *qxl)
     if (qxl->vgamem_size_mb < 8) {
         qxl->vgamem_size_mb = 8;
     }
+    /* XXX: we round vgamem_size_mb up to a nearest power of two and it must be
+     * less than vga_common_init()'s maximum on qxl->vga.vram_size (512 now).
+     */
+    if (qxl->vgamem_size_mb > 256) {
+        qxl->vgamem_size_mb = 256;
+    }
     qxl->vgamem_size = qxl->vgamem_size_mb * 1024 * 1024;
 
     /* vga ram (bar 0, total) */
@@ -1910,10 +1907,10 @@ static void qxl_init_ramsize(PCIQXLDevice *qxl)
         qxl->vram32_size = 4096;
         qxl->vram_size = 4096;
     }
-    qxl->vgamem_size = msb_mask(qxl->vgamem_size * 2 - 1);
+    qxl->vgamem_size = pow2ceil(qxl->vgamem_size);
-    qxl->vga.vram_size = msb_mask(qxl->vga.vram_size * 2 - 1);
+    qxl->vga.vram_size = pow2ceil(qxl->vga.vram_size);
-    qxl->vram32_size = msb_mask(qxl->vram32_size * 2 - 1);
+    qxl->vram32_size = pow2ceil(qxl->vram32_size);
-    qxl->vram_size = msb_mask(qxl->vram_size * 2 - 1);
+    qxl->vram_size = pow2ceil(qxl->vram_size);
 }
 
 static int qxl_init_common(PCIQXLDevice *qxl)
@@ -1945,7 +1942,7 @@ static int qxl_init_common(PCIQXLDevice *qxl)
         break;
     case 4: /* qxl-4 */
         pci_device_rev = QXL_REVISION_STABLE_V12;
-        io_size = msb_mask(QXL_IO_RANGE_SIZE * 2 - 1);
+        io_size = pow2ceil(QXL_IO_RANGE_SIZE);
         break;
     default:
         error_report("Invalid revision %d for qxl device (max %d)",

hw/display/vga.c

@@ -2094,6 +2094,17 @@ static const GraphicHwOps vga_ops = {
     .text_update = vga_update_text,
 };
 
+static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax)
+{
+    if (val < vmin) {
+        return vmin;
+    }
+    if (val > vmax) {
+        return vmax;
+    }
+    return val;
+}
+
 void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate)
 {
     int i, j, v, b;
@@ -2121,13 +2132,10 @@ void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate)
         expand4to8[i] = v;
     }
 
-    /* valid range: 1 MB -> 256 MB */
+    s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512);
-    s->vram_size = 1024 * 1024;
+    s->vram_size_mb = pow2ceil(s->vram_size_mb);
-    while (s->vram_size < (s->vram_size_mb << 20) &&
+    s->vram_size = s->vram_size_mb << 20;
-           s->vram_size < (256 << 20)) {
+
-        s->vram_size <<= 1;
-    }
-    s->vram_size_mb = s->vram_size >> 20;
     if (!s->vbe_size) {
         s->vbe_size = s->vram_size;
     }

include/qemu-common.h

@@ -418,6 +418,9 @@ static inline bool is_power_of_2(uint64_t value)
 /* round down to the nearest power of 2*/
 int64_t pow2floor(int64_t value);
 
+/* round up to the nearest power of 2 (0 if overflow) */
+uint64_t pow2ceil(uint64_t value);
+
 #include "qemu/module.h"
 
 /*

util/cutils.c

@@ -483,6 +483,20 @@ int64_t pow2floor(int64_t value)
     return value;
 }
 
+/* round up to the nearest power of 2 (0 if overflow) */
+uint64_t pow2ceil(uint64_t value)
+{
+    uint8_t nlz = clz64(value);
+
+    if (is_power_of_2(value)) {
+        return value;
+    }
+    if (!nlz) {
+        return 0;
+    }
+    return 1ULL << (64 - nlz);
+}
+
 /*
  * Implementation of  ULEB128 (http://en.wikipedia.org/wiki/LEB128)
  * Input is limited to 14-bit numbers