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d6bf060573
The caller function has already done the checking to make sure the req is targeted for the called functions, so there is no need to do the same checking in called functions. Remove calling of is_bar_offset() in vdev_pt_read_cfg/vdev_pt_write_cfg: In vpci.c's vpci_read_pt_dev_cfg and vpci_write_dev_cfg, vbar_access is called first to make sure the req is targed for vdev pt (vbar emulation) before dispatching the request to vdev_pt_read_cfg/vdev_pt_write_cfg, so there is no need to call is_bar_offset() again to do the same checking in vdev_pt_read_cfg/vdev_pt_write_cfg. The same goes for msicap_access/msixcap_access vbar_access should only check if the req is for bar access, it should not care about whether the bar access is 4 bytes or 4 bytes aligned. The called function vdev_pt_write_vbar will check and ignore the write access if it is not 4 bytes or 4 bytes aligned, although this is counted as a bar access. vdev_pt_read_vbar will check if the read access is 4 bytes or 4 bytes aligned, although this is counted as a bar access, set read value (*val) to -1 if the access is not 4 bytes (or aligned). Tracked-On: #3475 Signed-off-by: dongshen <dongsheng.x.zhang@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
ACRN Hypervisor ############### The open source `Project ACRN`_ defines a device hypervisor reference stack and an architecture for running multiple software subsystems, managed securely, on a consolidated system by means of a virtual machine manager. It also defines a reference framework implementation for virtual device emulation, called the "ACRN Device Model". The ACRN Hypervisor is a Type 1 reference hypervisor stack, running directly on the bare-metal hardware, and is suitable for a variety of IoT and embedded device solutions. The ACRN hypervisor addresses the gap that currently exists between datacenter hypervisors, and hard partitioning hypervisors. The ACRN hypervisor architecture partitions the system into different functional domains, with carefully selected guest OS sharing optimizations for IoT and embedded devices. You can find out more about Project ACRN on the `Project ACRN documentation`_ website. .. _`Project ACRN`: https://projectacrn.org .. _`ACRN Hypervisor`: https://github.com/projectacrn/acrn-hypervisor .. _`Project ACRN documentation`: https://projectacrn.github.io/