Merge remote-tracking branch 'remotes/kraxel/tags/vga-20190111-pull-request' into staging

vga: enable virtio test, fix ddc oob read

# gpg: Signature made Fri 11 Jan 2019 13:58:12 GMT
# gpg:                using RSA key 4CB6D8EED3E87138
# 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>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/vga-20190111-pull-request:
  i2c-ddc: fix oob read
  tests/display-vga: Enable virtio-vga test
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/i2c/i2c-ddc.c

@@ -56,7 +56,7 @@ static int i2c_ddc_rx(I2CSlave *i2c)
     I2CDDCState *s = I2CDDC(i2c);
 
     int value;
-    value = s->edid_blob[s->reg];
+    value = s->edid_blob[s->reg % sizeof(s->edid_blob)];
     s->reg++;
     return value;
 }

tests/Makefile.include

@@ -222,18 +222,23 @@ check-qtest-x86_64-y += $(check-qtest-i386-y)
 check-qtest-x86_64-$(CONFIG_SDHCI) += tests/sdhci-test$(EXESUF)
 
 check-qtest-alpha-y += tests/boot-serial-test$(EXESUF)
+check-qtest-alpha-$(CONFIG_VGA) += tests/display-vga-test$(EXESUF)
 
 check-qtest-hppa-y += tests/boot-serial-test$(EXESUF)
+check-qtest-hppa-$(CONFIG_VGA) += tests/display-vga-test$(EXESUF)
 
 check-qtest-m68k-y = tests/boot-serial-test$(EXESUF)
 
 check-qtest-microblaze-y += tests/boot-serial-test$(EXESUF)
 
 check-qtest-mips-$(CONFIG_ISA_TESTDEV) = tests/endianness-test$(EXESUF)
+check-qtest-mips-$(CONFIG_VGA) += tests/display-vga-test$(EXESUF)
 
 check-qtest-mips64-$(CONFIG_ISA_TESTDEV) = tests/endianness-test$(EXESUF)
+check-qtest-mips64-$(CONFIG_VGA) += tests/display-vga-test$(EXESUF)
 
 check-qtest-mips64el-$(CONFIG_ISA_TESTDEV) = tests/endianness-test$(EXESUF)
+check-qtest-mips64el-$(CONFIG_VGA) += tests/display-vga-test$(EXESUF)
 
 check-qtest-moxie-y += tests/boot-serial-test$(EXESUF)
 

tests/display-vga-test.c

@@ -40,13 +40,11 @@ static void pci_virtio_gpu(void)
     qtest_end();
 }
 
-#ifdef CONFIG_VIRTIO_VGA
 static void pci_virtio_vga(void)
 {
     qtest_start("-vga none -device virtio-vga");
     qtest_end();
 }
-#endif
 
 int main(int argc, char **argv)
 {
@@ -62,8 +60,10 @@ int main(int argc, char **argv)
     qtest_add_func("/display/pci/secondary", pci_secondary);
     qtest_add_func("/display/pci/multihead", pci_multihead);
     qtest_add_func("/display/pci/virtio-gpu", pci_virtio_gpu);
-#ifdef CONFIG_VIRTIO_VGA
-    qtest_add_func("/display/pci/virtio-vga", pci_virtio_vga);
-#endif
+    if (g_str_equal(arch, "i386") || g_str_equal(arch, "x86_64") ||
+        g_str_equal(arch, "hppa") || g_str_equal(arch, "ppc64")) {
+        qtest_add_func("/display/pci/virtio-vga", pci_virtio_vga);
+    }
+
     return g_test_run();
 }