• Lennart Sorensen's avatar
    ARM: omap5/dra7xx: Enable booting secondary CPU in HYP mode · 999f934d
    Lennart Sorensen authored
    If the boot loader enables HYP mode on the boot CPU, the secondary CPU
    also needs to call into the ROM to switch to HYP mode before booting.
    The firmwares on the omap5 and dra7xx unfortunately do not take care
    of this, so it has to be handled by the kernel.
    
    This patch is based on "[PATCH 2/2] ARM: OMAP5: Add HYP mode entry support
    for secondary CPUs" by Santosh Shilimkar <santosh.shilimkar@ti.com>,
    except this version does not require a compile time CONFIG to control
    if it should enable HYP mode or not, it simply does it based on the mode
    of the boot CPU, so it works whether the CPU boots in SVC or HYP mode,
    and should even work as a guest kernel inside kvm if qemu decides to
    support emulating the omap5 or dra7xx.
    
    Cc: stable@vger.kernel.org #v3.16+
    Signed-off-by: default avatarLen Sorensen <lsorense@csclub.uwaterloo.ca>
    Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
    999f934d
common.h 8.2 KB