• C
    cxl: Fix number of allocated pages in SPA · 4108efb0
    Christophe Lombard 提交于
    The scheduled process area is currently allocated before assigning the
    correct maximum processes to the AFU, which will mean we only ever
    allocate a fixed number of pages for the scheduled process area. This
    will limit us to 958 processes with 2 x 64K pages. If we try to use more
    processes than that we'd probably overrun the buffer and corrupt memory
    or crash.
    
    AFUs that require three or more interrupts per process will not be
    affected as they are already limited to less processes than that, but we
    could hit it on an AFU that requires 0, 1 or 2 interrupts per process,
    or when using 4K pages.
    
    This patch moves the initialisation of the num_procs to before the SPA
    allocation so that enough pages will be allocated for the number of
    processes that the AFU supports.
    Signed-off-by: NChristophe Lombard <clombard@linux.vnet.ibm.com>
    Signed-off-by: NIan Munsie <imunsie@au1.ibm.com>
    Cc: <stable@vger.kernel.org> # 3.18+
    Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
    4108efb0
native.c 20.3 KB