Hi Boris, thanks for the detail review.
On 09/13/2017 10:06 AM, Borislav Petkov wrote: ...
+static int sev_platform_get_state(int *state, int *error) +{ + int ret; + struct sev_data_status *data; + + data = kzalloc(sizeof(*data), GFP_KERNEL);It's a bit silly to do the allocation only for the duration of sev_platform_status() - just allocate "data" on the stack.
I am okay with moving it on the stack but just to give context why I went in this way. The physical address of data is given to the device (in this case SEV FW). I was not sure if its okay to pass the stack address to the device. Additionally, the FW spec requires us to zero all the fields -- so we need to memset if we allocate it on the stack.
