Add support for Tegra V4L2 VDA

content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.cc

Index: content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.cc
diff --git a/content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.cc b/content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.cc
index 82a91b38021f829167062cb723d4dce1b4c599bd..d4ef90548d1dabacc6fd592d2dc1a9c5404c4b3c 100644
--- a/content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.cc
+++ b/content/common/sandbox_linux/bpf_cros_arm_gpu_policy_linux.cc
@@ -85,6 +85,8 @@ void AddArmTegraGpuWhitelist(std::vector<std::string>* read_whitelist,
   static const char kDevNvhostCtrlGpuPath[] = "/dev/nvhost-ctrl-gpu";
   static const char kSysDevicesSocIDPath[] = "/sys/devices/soc0/soc_id";
   static const char kSysDevicesSocRevPath[] = "/sys/devices/soc0/revision";
+  static const char kDevNvavpPath[] = "/dev/tegra_avpchannel";
+  static const char kDevVicPath[] = "/dev/nvhost-vic";
   // TODO(davidung): remove these device nodes before nyan launch.
 
   read_whitelist->push_back(kDevNvhostCtrlPath);
@@ -96,6 +98,8 @@ void AddArmTegraGpuWhitelist(std::vector<std::string>* read_whitelist,
   read_whitelist->push_back(kDevNvhostCtrlGpuPath);
   read_whitelist->push_back(kSysDevicesSocIDPath);
   read_whitelist->push_back(kSysDevicesSocRevPath);
+  read_whitelist->push_back(kDevNvavpPath);
+  read_whitelist->push_back(kDevVicPath);
 
   write_whitelist->push_back(kDevNvhostCtrlPath);
   write_whitelist->push_back(kDevNvhostIspPath);
@@ -104,6 +108,8 @@ void AddArmTegraGpuWhitelist(std::vector<std::string>* read_whitelist,
   write_whitelist->push_back(kDevNvhostGpuPath);
   write_whitelist->push_back(kDevNvhostAsGpuPath);
   write_whitelist->push_back(kDevNvhostCtrlGpuPath);
+  write_whitelist->push_back(kDevNvavpPath);
+  write_whitelist->push_back(kDevVicPath);

[shivdasp, 2014/03/21 10:53:45]

This whitelisting is only temporary and a change to remove these altogether is
up for review as part of another CL.

[sheu, 2014/03/21 23:19:54]

I'd be inclined not to add whitelisting, even if temporary, if at all possible.

[shivdasp, 2014/03/24 03:49:00]

There's a race between this CL and another which removes Tegra whitelisting
altogether.I will remove this since that another one is mostly ready to go.

 }
 
 void AddArmGpuWhitelist(std::vector<std::string>* read_whitelist,
@@ -222,6 +228,10 @@ bool CrosArmGpuProcessPolicy::PreSandboxHook() {
   dlopen("/usr/lib/libnvidia-rmapi-tegra.so", dlopen_flag);
   dlopen("/usr/lib/libnvidia-eglcore.so", dlopen_flag);
   // TODO(davidung): remove these libraries before nyan launch.
+  dlopen("/usr/lib/libtegrav4l2.so", dlopen_flag);
+  // Resetting errno since platform-specific libraries will fail on other
+  // platforms.
+  errno = 0;
 
   return true;
 }