Merge tag 'kraxel-20220427-pull-request' of git://git.kraxel.org/qemu into staging

vnc: add display-update monitor command.
screendump: add png support.
vmsvga: screen update fix.
i386: sev setup for -bios loaded firmware

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# gpg: Signature made Wed 27 Apr 2022 10:29:41 AM PDT
# gpg:                using RSA key A0328CFFB93A17A79901FE7D4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [undefined]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [undefined]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* tag 'kraxel-20220427-pull-request' of git://git.kraxel.org/qemu:
  i386: firmware parsing and sev setup for -bios loaded firmware
  i386: factor out x86_firmware_configure()
  i386: move bios load error message
  avocado/vnc: add test_change_listen
  qapi/ui: add 'display-update' command for changing listen address
  ui/vnc: refactor arrays of addresses to SocketAddressList
  Added parameter to take screenshot with screendump as PNG
  Replacing CONFIG_VNC_PNG with CONFIG_PNG
  hw/display/vmware_vga: do not discard screen updates

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

4 files changed, 184 insertions, 93 deletions

diff --git a/ui/console.c b/ui/console.c
index 1752f2ec88..15d0f6affd 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -37,6 +37,9 @@
 #include "exec/memory.h"
 #include "io/channel-file.h"
 #include "qom/object.h"
+#ifdef CONFIG_PNG
+#include <png.h>
+#endif
 
 #define DEFAULT_BACKSCROLL 512
 #define CONSOLE_CURSOR_PERIOD 500
@@ -291,6 +294,89 @@ void graphic_hw_invalidate(QemuConsole *con)
     }
 }
 
+#ifdef CONFIG_PNG
+/**
+ * png_save: Take a screenshot as PNG
+ *
+ * Saves screendump as a PNG file
+ *
+ * Returns true for success or false for error.
+ *
+ * @fd: File descriptor for PNG file.
+ * @image: Image data in pixman format.
+ * @errp: Pointer to an error.
+ */
+static bool png_save(int fd, pixman_image_t *image, Error **errp)
+{
+    int width = pixman_image_get_width(image);
+    int height = pixman_image_get_height(image);
+    g_autofree png_struct *png_ptr = NULL;
+    g_autofree png_info *info_ptr = NULL;
+    g_autoptr(pixman_image_t) linebuf =
+                            qemu_pixman_linebuf_create(PIXMAN_a8r8g8b8, width);
+    uint8_t *buf = (uint8_t *)pixman_image_get_data(linebuf);
+    FILE *f = fdopen(fd, "wb");
+    int y;
+    if (!f) {
+        error_setg_errno(errp, errno,
+                         "Failed to create file from file descriptor");
+        return false;
+    }
+
+    png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL,
+                                      NULL, NULL);
+    if (!png_ptr) {
+        error_setg(errp, "PNG creation failed. Unable to write struct");
+        fclose(f);
+        return false;
+    }
+
+    info_ptr = png_create_info_struct(png_ptr);
+
+    if (!info_ptr) {
+        error_setg(errp, "PNG creation failed. Unable to write info");
+        fclose(f);
+        png_destroy_write_struct(&png_ptr, &info_ptr);
+        return false;
+    }
+
+    png_init_io(png_ptr, f);
+
+    png_set_IHDR(png_ptr, info_ptr, width, height, 8,
+                 PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
+                 PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
+
+    png_write_info(png_ptr, info_ptr);
+
+    for (y = 0; y < height; ++y) {
+        qemu_pixman_linebuf_fill(linebuf, image, width, 0, y);
+        png_write_row(png_ptr, buf);
+    }
+    qemu_pixman_image_unref(linebuf);
+
+    png_write_end(png_ptr, NULL);
+
+    png_destroy_write_struct(&png_ptr, &info_ptr);
+
+    if (fclose(f) != 0) {
+        error_setg_errno(errp, errno,
+                         "PNG creation failed. Unable to close file");
+        return false;
+    }
+
+    return true;
+}
+
+#else /* no png support */
+
+static bool png_save(int fd, pixman_image_t *image, Error **errp)
+{
+    error_setg(errp, "Enable PNG support with libpng for screendump");
+    return false;
+}
+
+#endif /* CONFIG_PNG */
+
 static bool ppm_save(int fd, pixman_image_t *image, Error **errp)
 {
     int width = pixman_image_get_width(image);
@@ -329,7 +415,8 @@ static void graphic_hw_update_bh(void *con)
 /* Safety: coroutine-only, concurrent-coroutine safe, main thread only */
 void coroutine_fn
 qmp_screendump(const char *filename, bool has_device, const char *device,
-               bool has_head, int64_t head, Error **errp)
+               bool has_head, int64_t head,
+               bool has_format, ImageFormat format, Error **errp)
 {
     g_autoptr(pixman_image_t) image = NULL;
     QemuConsole *con;
@@ -385,8 +472,16 @@ qmp_screendump(const char *filename, bool has_device, const char *device,
      * yields and releases the BQL. It could produce corrupted dump, but
      * it should be otherwise safe.
      */
-    if (!ppm_save(fd, image, errp)) {
-        qemu_unlink(filename);
+    if (has_format && format == IMAGE_FORMAT_PNG) {
+        /* PNG format specified for screendump */
+        if (!png_save(fd, image, errp)) {
+            qemu_unlink(filename);
+        }
+    } else {
+        /* PPM format specified/default for screendump */
+        if (!ppm_save(fd, image, errp)) {
+            qemu_unlink(filename);
+        }
     }
 }
 
diff --git a/ui/vnc-enc-tight.c b/ui/vnc-enc-tight.c
index 5a4b8a4fc0..09200d71b8 100644
--- a/ui/vnc-enc-tight.c
+++ b/ui/vnc-enc-tight.c
@@ -32,7 +32,7 @@
    INT32 definitions between jmorecfg.h (included by jpeglib.h) and
    Win32 basetsd.h (included by windows.h). */
 
-#ifdef CONFIG_VNC_PNG
+#ifdef CONFIG_PNG
 /* The following define is needed by pngconf.h. Otherwise it won't compile,
    because setjmp.h was already included by osdep.h. */
 #define PNG_SKIP_SETJMP_CHECK
@@ -95,7 +95,7 @@ static const struct {
 };
 #endif
 
-#ifdef CONFIG_VNC_PNG
+#ifdef CONFIG_PNG
 static const struct {
     int png_zlib_level, png_filters;
 } tight_png_conf[] = {
@@ -919,7 +919,7 @@ static int send_full_color_rect(VncState *vs, int x, int y, int w, int h)
     int stream = 0;
     ssize_t bytes;
 
-#ifdef CONFIG_VNC_PNG
+#ifdef CONFIG_PNG
     if (tight_can_send_png_rect(vs, w, h)) {
         return send_png_rect(vs, x, y, w, h, NULL);
     }
@@ -966,7 +966,7 @@ static int send_mono_rect(VncState *vs, int x, int y,
     int stream = 1;
     int level = tight_conf[vs->tight->compression].mono_zlib_level;
 
-#ifdef CONFIG_VNC_PNG
+#ifdef CONFIG_PNG
     if (tight_can_send_png_rect(vs, w, h)) {
         int ret;
         int bpp = vs->client_pf.bytes_per_pixel * 8;
@@ -1020,7 +1020,7 @@ static int send_mono_rect(VncState *vs, int x, int y,
 struct palette_cb_priv {
     VncState *vs;
     uint8_t *header;
-#ifdef CONFIG_VNC_PNG
+#ifdef CONFIG_PNG
     png_colorp png_palette;
 #endif
 };
@@ -1082,7 +1082,7 @@ static int send_palette_rect(VncState *vs, int x, int y,
     int colors;
     ssize_t bytes;
 
-#ifdef CONFIG_VNC_PNG
+#ifdef CONFIG_PNG
     if (tight_can_send_png_rect(vs, w, h)) {
         return send_png_rect(vs, x, y, w, h, palette);
     }
@@ -1233,7 +1233,7 @@ static int send_jpeg_rect(VncState *vs, int x, int y, int w, int h, int quality)
 /*
  * PNG compression stuff.
  */
-#ifdef CONFIG_VNC_PNG
+#ifdef CONFIG_PNG
 static void write_png_palette(int idx, uint32_t pix, void *opaque)
 {
     struct palette_cb_priv *priv = opaque;
@@ -1379,7 +1379,7 @@ static int send_png_rect(VncState *vs, int x, int y, int w, int h,
     buffer_reset(&vs->tight->png);
     return 1;
 }
-#endif /* CONFIG_VNC_PNG */
+#endif /* CONFIG_PNG */
 
 static void vnc_tight_start(VncState *vs)
 {
@@ -1706,7 +1706,7 @@ void vnc_tight_clear(VncState *vs)
 #ifdef CONFIG_VNC_JPEG
     buffer_free(&vs->tight->jpeg);
 #endif
-#ifdef CONFIG_VNC_PNG
+#ifdef CONFIG_PNG
     buffer_free(&vs->tight->png);
 #endif
 }
diff --git a/ui/vnc.c b/ui/vnc.c
index 1347e27b5b..6a05d06147 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -2165,7 +2165,7 @@ static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings)
             vs->features |= VNC_FEATURE_TIGHT_MASK;
             vs->vnc_encoding = enc;
             break;
-#ifdef CONFIG_VNC_PNG
+#ifdef CONFIG_PNG
         case VNC_ENCODING_TIGHT_PNG:
             vs->features |= VNC_FEATURE_TIGHT_PNG_MASK;
             vs->vnc_encoding = enc;
@@ -3256,7 +3256,7 @@ static void vnc_connect(VncDisplay *vd, QIOChannelSocket *sioc,
 #ifdef CONFIG_VNC_JPEG
     buffer_init(&vs->tight->jpeg,     "vnc-tight-jpeg/%p", sioc);
 #endif
-#ifdef CONFIG_VNC_PNG
+#ifdef CONFIG_PNG
     buffer_init(&vs->tight->png,      "vnc-tight-png/%p", sioc);
 #endif
     buffer_init(&vs->zlib.zlib,      "vnc-zlib/%p", sioc);
@@ -3820,30 +3820,19 @@ static int vnc_display_get_address(const char *addrstr,
     return ret;
 }
 
-static void vnc_free_addresses(SocketAddress ***retsaddr,
-                               size_t *retnsaddr)
-{
-    size_t i;
-
-    for (i = 0; i < *retnsaddr; i++) {
-        qapi_free_SocketAddress((*retsaddr)[i]);
-    }
-    g_free(*retsaddr);
-
-    *retsaddr = NULL;
-    *retnsaddr = 0;
-}
-
 static int vnc_display_get_addresses(QemuOpts *opts,
                                      bool reverse,
-                                     SocketAddress ***retsaddr,
-                                     size_t *retnsaddr,
-                                     SocketAddress ***retwsaddr,
-                                     size_t *retnwsaddr,
+                                     SocketAddressList **saddr_list_ret,
+                                     SocketAddressList **wsaddr_list_ret,
                                      Error **errp)
 {
     SocketAddress *saddr = NULL;
     SocketAddress *wsaddr = NULL;
+    g_autoptr(SocketAddressList) saddr_list = NULL;
+    SocketAddressList **saddr_tail = &saddr_list;
+    SocketAddress *single_saddr = NULL;
+    g_autoptr(SocketAddressList) wsaddr_list = NULL;
+    SocketAddressList **wsaddr_tail = &wsaddr_list;
     QemuOptsIter addriter;
     const char *addr;
     int to = qemu_opt_get_number(opts, "to", 0);
@@ -3852,23 +3841,16 @@ static int vnc_display_get_addresses(QemuOpts *opts,
     bool ipv4 = qemu_opt_get_bool(opts, "ipv4", false);
     bool ipv6 = qemu_opt_get_bool(opts, "ipv6", false);
     int displaynum = -1;
-    int ret = -1;
-
-    *retsaddr = NULL;
-    *retnsaddr = 0;
-    *retwsaddr = NULL;
-    *retnwsaddr = 0;
 
     addr = qemu_opt_get(opts, "vnc");
     if (addr == NULL || g_str_equal(addr, "none")) {
-        ret = 0;
-        goto cleanup;
+        return 0;
     }
     if (qemu_opt_get(opts, "websocket") &&
         !qcrypto_hash_supports(QCRYPTO_HASH_ALG_SHA1)) {
         error_setg(errp,
                    "SHA1 hash support is required for websockets");
-        goto cleanup;
+        return -1;
     }
 
     qemu_opt_iter_init(&addriter, opts, "vnc");
@@ -3879,7 +3861,7 @@ static int vnc_display_get_addresses(QemuOpts *opts,
                                      ipv4, ipv6,
                                      &saddr, errp);
         if (rv < 0) {
-            goto cleanup;
+            return -1;
         }
         /* Historical compat - first listen address can be used
          * to set the default websocket port
@@ -3887,13 +3869,16 @@ static int vnc_display_get_addresses(QemuOpts *opts,
         if (displaynum == -1) {
             displaynum = rv;
         }
-        *retsaddr = g_renew(SocketAddress *, *retsaddr, *retnsaddr + 1);
-        (*retsaddr)[(*retnsaddr)++] = saddr;
+        QAPI_LIST_APPEND(saddr_tail, saddr);
     }
 
-    /* If we had multiple primary displays, we don't do defaults
-     * for websocket, and require explicit config instead. */
-    if (*retnsaddr > 1) {
+    if (saddr_list && !saddr_list->next) {
+        single_saddr = saddr_list->value;
+    } else {
+        /*
+         * If we had multiple primary displays, we don't do defaults
+         * for websocket, and require explicit config instead.
+         */
         displaynum = -1;
     }
 
@@ -3903,57 +3888,50 @@ static int vnc_display_get_addresses(QemuOpts *opts,
                                     has_ipv4, has_ipv6,
                                     ipv4, ipv6,
                                     &wsaddr, errp) < 0) {
-            goto cleanup;
+            return -1;
         }
 
         /* Historical compat - if only a single listen address was
          * provided, then this is used to set the default listen
          * address for websocket too
          */
-        if (*retnsaddr == 1 &&
-            (*retsaddr)[0]->type == SOCKET_ADDRESS_TYPE_INET &&
+        if (single_saddr &&
+            single_saddr->type == SOCKET_ADDRESS_TYPE_INET &&
             wsaddr->type == SOCKET_ADDRESS_TYPE_INET &&
             g_str_equal(wsaddr->u.inet.host, "") &&
-            !g_str_equal((*retsaddr)[0]->u.inet.host, "")) {
+            !g_str_equal(single_saddr->u.inet.host, "")) {
             g_free(wsaddr->u.inet.host);
-            wsaddr->u.inet.host = g_strdup((*retsaddr)[0]->u.inet.host);
+            wsaddr->u.inet.host = g_strdup(single_saddr->u.inet.host);
         }
 
-        *retwsaddr = g_renew(SocketAddress *, *retwsaddr, *retnwsaddr + 1);
-        (*retwsaddr)[(*retnwsaddr)++] = wsaddr;
+        QAPI_LIST_APPEND(wsaddr_tail, wsaddr);
     }
 
-    ret = 0;
- cleanup:
-    if (ret < 0) {
-        vnc_free_addresses(retsaddr, retnsaddr);
-        vnc_free_addresses(retwsaddr, retnwsaddr);
-    }
-    return ret;
+    *saddr_list_ret = g_steal_pointer(&saddr_list);
+    *wsaddr_list_ret = g_steal_pointer(&wsaddr_list);
+    return 0;
 }
 
 static int vnc_display_connect(VncDisplay *vd,
-                               SocketAddress **saddr,
-                               size_t nsaddr,
-                               SocketAddress **wsaddr,
-                               size_t nwsaddr,
+                               SocketAddressList *saddr_list,
+                               SocketAddressList *wsaddr_list,
                                Error **errp)
 {
     /* connect to viewer */
     QIOChannelSocket *sioc = NULL;
-    if (nwsaddr != 0) {
+    if (wsaddr_list) {
         error_setg(errp, "Cannot use websockets in reverse mode");
         return -1;
     }
-    if (nsaddr != 1) {
+    if (!saddr_list || saddr_list->next) {
         error_setg(errp, "Expected a single address in reverse mode");
         return -1;
     }
     /* TODO SOCKET_ADDRESS_TYPE_FD when fd has AF_UNIX */
-    vd->is_unix = saddr[0]->type == SOCKET_ADDRESS_TYPE_UNIX;
+    vd->is_unix = saddr_list->value->type == SOCKET_ADDRESS_TYPE_UNIX;
     sioc = qio_channel_socket_new();
     qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-reverse");
-    if (qio_channel_socket_connect_sync(sioc, saddr[0], errp) < 0) {
+    if (qio_channel_socket_connect_sync(sioc, saddr_list->value, errp) < 0) {
         object_unref(OBJECT(sioc));
         return -1;
     }
@@ -3964,20 +3942,18 @@ static int vnc_display_connect(VncDisplay *vd,
 
 
 static int vnc_display_listen(VncDisplay *vd,
-                              SocketAddress **saddr,
-                              size_t nsaddr,
-                              SocketAddress **wsaddr,
-                              size_t nwsaddr,
+                              SocketAddressList *saddr_list,
+                              SocketAddressList *wsaddr_list,
                               Error **errp)
 {
-    size_t i;
+    SocketAddressList *el;
 
-    if (nsaddr) {
+    if (saddr_list) {
         vd->listener = qio_net_listener_new();
         qio_net_listener_set_name(vd->listener, "vnc-listen");
-        for (i = 0; i < nsaddr; i++) {
+        for (el = saddr_list; el; el = el->next) {
             if (qio_net_listener_open_sync(vd->listener,
-                                           saddr[i], 1,
+                                           el->value, 1,
                                            errp) < 0)  {
                 return -1;
             }
@@ -3987,12 +3963,12 @@ static int vnc_display_listen(VncDisplay *vd,
                                          vnc_listen_io, vd, NULL);
     }
 
-    if (nwsaddr) {
+    if (wsaddr_list) {
         vd->wslistener = qio_net_listener_new();
         qio_net_listener_set_name(vd->wslistener, "vnc-ws-listen");
-        for (i = 0; i < nwsaddr; i++) {
+        for (el = wsaddr_list; el; el = el->next) {
             if (qio_net_listener_open_sync(vd->wslistener,
-                                           wsaddr[i], 1,
+                                           el->value, 1,
                                            errp) < 0)  {
                 return -1;
             }
@@ -4005,13 +3981,36 @@ static int vnc_display_listen(VncDisplay *vd,
     return 0;
 }
 
+bool vnc_display_update(DisplayUpdateOptionsVNC *arg, Error **errp)
+{
+    VncDisplay *vd = vnc_display_find(NULL);
+
+    if (!vd) {
+        error_setg(errp, "Can not find vnc display");
+        return false;
+    }
+
+    if (arg->has_addresses) {
+        if (vd->listener) {
+            qio_net_listener_disconnect(vd->listener);
+            object_unref(OBJECT(vd->listener));
+            vd->listener = NULL;
+        }
+
+        if (vnc_display_listen(vd, arg->addresses, NULL, errp) < 0) {
+            return false;
+        }
+    }
+
+    return true;
+}
 
 void vnc_display_open(const char *id, Error **errp)
 {
     VncDisplay *vd = vnc_display_find(id);
     QemuOpts *opts = qemu_opts_find(&qemu_vnc_opts, id);
-    SocketAddress **saddr = NULL, **wsaddr = NULL;
-    size_t nsaddr, nwsaddr;
+    g_autoptr(SocketAddressList) saddr_list = NULL;
+    g_autoptr(SocketAddressList) wsaddr_list = NULL;
     const char *share, *device_id;
     QemuConsole *con;
     bool password = false;
@@ -4036,8 +4035,8 @@ void vnc_display_open(const char *id, Error **errp)
     }
 
     reverse = qemu_opt_get_bool(opts, "reverse", false);
-    if (vnc_display_get_addresses(opts, reverse, &saddr, &nsaddr,
-                                  &wsaddr, &nwsaddr, errp) < 0) {
+    if (vnc_display_get_addresses(opts, reverse, &saddr_list, &wsaddr_list,
+                                  errp) < 0) {
         goto fail;
     }
 
@@ -4212,16 +4211,16 @@ void vnc_display_open(const char *id, Error **errp)
     }
     qkbd_state_set_delay(vd->kbd, key_delay_ms);
 
-    if (saddr == NULL) {
-        goto cleanup;
+    if (saddr_list == NULL) {
+        return;
     }
 
     if (reverse) {
-        if (vnc_display_connect(vd, saddr, nsaddr, wsaddr, nwsaddr, errp) < 0) {
+        if (vnc_display_connect(vd, saddr_list, wsaddr_list, errp) < 0) {
             goto fail;
         }
     } else {
-        if (vnc_display_listen(vd, saddr, nsaddr, wsaddr, nwsaddr, errp) < 0) {
+        if (vnc_display_listen(vd, saddr_list, wsaddr_list, errp) < 0) {
             goto fail;
         }
     }
@@ -4230,14 +4229,11 @@ void vnc_display_open(const char *id, Error **errp)
         vnc_display_print_local_addr(vd);
     }
 
- cleanup:
-    vnc_free_addresses(&saddr, &nsaddr);
-    vnc_free_addresses(&wsaddr, &nwsaddr);
+    /* Success */
     return;
 
 fail:
     vnc_display_close(vd);
-    goto cleanup;
 }
 
 void vnc_display_add_client(const char *id, int csock, bool skipauth)
diff --git a/ui/vnc.h b/ui/vnc.h
index a7149831f9..a60fb13115 100644
--- a/ui/vnc.h
+++ b/ui/vnc.h
@@ -201,7 +201,7 @@ typedef struct VncTight {
 #ifdef CONFIG_VNC_JPEG
     Buffer jpeg;
 #endif
-#ifdef CONFIG_VNC_PNG
+#ifdef CONFIG_PNG
     Buffer png;
 #endif
     int levels[4];