After much work and validation by LSI, Red Hat and Dell, a Linux driver is now available on support.dell.com for the VRTX Shared PERC 8. This driver supports the single-controller Entry Shared Mode (ESM) configuration. Work is in progress to support the dual-controller High Availability Shared PERC configuration on Linux. Stay tuned!
The driver has been available in the upstream Linux kernel since kernel version 3.15. However, it is now available on support.dell.com for RHEL 6.5 and SLES 11 SP3.
RHEL 6.5 driver: http://www.dell.com/support/home/us/en/19/Drivers/DriversDetails?driverId=MT3C1
SLES 11 SP3 driver: http://www.dell.com/support/home/us/en/19/Drivers/DriversDetails?driverId=CM5GH