sys_fs, sys_ss, and sys_usbd: LV2 syscalls enhancements

[brian218]

• Implemented sys_fs_mount() with argument prot=1 for mounting VFS devices in read only mode (mainly used by XMB).
• Further implemented Update Manager service so that the progress of firmware update in XMB can go to 99%, tested in DEX&DECR.
• Implemented sys_usbd_unregister_extra_ldd() and improved the other ldd-related syscalls.

[elad335]

Thread-safety matters.

[brian218]

Locks have been added to sys_fs_newfs/mount/unmount syscalls earlier today.

[elad335]

cellSysCache and sys_ss contain such code.

[brian218]

cellSysCache and sys_ss contain such code.

Solved.

[brian218]

Thread-safety matters.

A shared_mutex has been added to lv2_update_manager as per the request.

[brian218]

While waiting for this PR's getting attention from the major developers, I made the progress of XMB's firmware update feature go farther, though it hasn't been fully supported yet.

[Megamouse]

"While waiting for this PR's getting attention from the major developers"
It's not gonna get faster if you add more stuff xd

[brian218]

"While waiting for this PR's getting attention from the major developers" It's not gonna get faster if you add more stuff xd

With new features and improvements, there's no loss for me honestly. XD

Comparison with v0.0.27-15025-08c1a14b:

[Megamouse]

hi, could you be so kind and test the usio config in #13896 ?

[Hadrianneue]

Gran Turismo 6 crashing on startup, works fine on previous build 0.0.28-15120.

RPCS3.zip

[brian218]

Gran Turismo 6 crashing on startup, works fine on previous build 0.0.28-15120.

RPCS3.zip

Kindly submit a formal issue report at https://github.com/RPCS3/rpcs3/issues/new/choose with the required information.