cuttlefish: enable gfxstream + QEMU by default

We can't enable gfxstream when:
  - we have QEMU + ARM64 host (since we don't build QEMU8 for arm64)
  - an QEMU + arm64 guest (I don't know why, but that was prior behavior)

Otherwise, on x86 hosts, QEMU8 is available and we should use
it.

BUG=327408955
TEST=compile

Change-Id: I12180c8048922cdc855fd9b1431f590b28ca7979

4 files changed, 22 insertions, 5 deletions

diff --git a/host/commands/assemble_cvd/graphics_flags.cc b/host/commands/assemble_cvd/graphics_flags.cc
index 19aebc519..c56e3da5c 100644
--- a/host/commands/assemble_cvd/graphics_flags.cc
+++ b/host/commands/assemble_cvd/graphics_flags.cc
@@ -255,9 +255,10 @@ Result<std::string> SelectGpuMode(
 
       LOG(INFO) << "GPU auto mode: detected prerequisites for accelerated "
                 << "rendering support.";
-      if (vm_manager == vm_manager::QemuManager::name()) {
-        LOG(INFO) << "Enabling --gpu_mode=drm_virgl.";
-        return kGpuModeDrmVirgl;
+
+      if (vm_manager == vm_manager::QemuManager::name() && !UseQemu8()) {
+        LOG(INFO) << "Not using QEMU8: selecting guest swiftshader";
+        return kGpuModeGuestSwiftshader;
       } else if (!guest_config.gfxstream_supported) {
         LOG(INFO) << "GPU auto mode: guest does not support gfxstream, "
                      "enabling --gpu_mode=guest_swiftshader";
@@ -284,6 +285,11 @@ Result<std::string> SelectGpuMode(
                     "function correctly. Please consider switching to "
                     "--gpu_mode=auto or --gpu_mode=guest_swiftshader.";
     }
+
+    if (vm_manager == vm_manager::QemuManager::name() && !UseQemu8()) {
+      LOG(INFO) << "Not using QEMU8: selecting guest swiftshader";
+      return kGpuModeGuestSwiftshader;
+    }
   }
 
   return gpu_mode_arg;
diff --git a/host/commands/assemble_cvd/graphics_flags.h b/host/commands/assemble_cvd/graphics_flags.h
index 69b1d7485..6a96dccb3 100644
--- a/host/commands/assemble_cvd/graphics_flags.h
+++ b/host/commands/assemble_cvd/graphics_flags.h
@@ -19,6 +19,7 @@
 
 #include "common/libs/utils/result.h"
 #include "host/commands/assemble_cvd/flags.h"
+#include "host/libs/config/config_utils.h"
 #include "host/libs/config/cuttlefish_config.h"
 
 namespace cuttlefish {
@@ -28,4 +29,4 @@ Result<std::string> ConfigureGpuSettings(
     const std::string& vm_manager, const GuestConfig& guest_config,
     CuttlefishConfig::MutableInstanceSpecific& instance);
 
-}  // namespace cuttlefish
\ No newline at end of file
+}  // namespace cuttlefish
diff --git a/host/libs/config/config_utils.cpp b/host/libs/config/config_utils.cpp
index 0ee99118f..9197877dc 100644
--- a/host/libs/config/config_utils.cpp
+++ b/host/libs/config/config_utils.cpp
@@ -111,10 +111,18 @@ std::string HostBinaryDir() {
   return DefaultHostArtifactsPath("bin");
 }
 
-std::string DefaultQemuBinaryDir() {
+bool UseQemu8() {
   const std::string target_prod_str = StringFromEnv("TARGET_PRODUCT", "");
   if (HostArch() == Arch::X86_64 &&
       target_prod_str.find("arm") == std::string::npos) {
+    return true;
+  }
+
+  return false;
+}
+
+std::string DefaultQemuBinaryDir() {
+  if (UseQemu8()) {
     return HostBinaryDir();
   }
   return "/usr/bin";
diff --git a/host/libs/config/config_utils.h b/host/libs/config/config_utils.h
index 1f9ca2843..8107f5e9b 100644
--- a/host/libs/config/config_utils.h
+++ b/host/libs/config/config_utils.h
@@ -59,4 +59,6 @@ std::string DefaultEnvironmentPath(const char* environment_key,
 // Whether the host supports qemu
 bool HostSupportsQemuCli();
 
+// Whether to use QEMU8
+bool UseQemu8();
 }