github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-09-09 04:39:34 +00:00
Code Issues Projects Releases Wiki Activity

DM: Remove 'strictio' from UOS bootargs' options

Browse Source 
- UOS will boot fail if 'strictio' is enabled ('-e' option), in this
   case (with '-e'), device model will block all PIO accesses whose
   handlers were not registered, after that, device model program will
   exit, hence UOS boot fail.

   actually, such kind of accesses exist, e.g. UOS would program
   PIT registers (port address: 0x43) if hpet is disabled.

 - For debug, we can trap unexpected PIO access in 'default_inout()'

Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
This commit is contained in:
Yonghua Huang
2018-06-27 21:53:39 +08:00
committed by lijinxia
parent 9f4404d0e6
commit 61cd6946d0
3 changed files with 4 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
devicemodel/core/inout.c
View File

@@ -88,13 +88,12 @@ register_default_iohandler(int start, int size)
}
int
emulate_inout(struct vmctx *ctx, int *pvcpu, struct pio_request *pio_request,
int strict)
emulate_inout(struct vmctx *ctx, int *pvcpu, struct pio_request *pio_request)
{
int bytes, flags, in, port;
inout_func_t handler;
void *arg;
int i, retval;
int retval;
bytes = pio_request->size;
in = (pio_request->direction == REQUEST_READ);
@@ -104,17 +103,6 @@ emulate_inout(struct vmctx *ctx, int *pvcpu, struct pio_request *pio_request,
assert(bytes == 1 || bytes == 2 || bytes == 4);
handler = inout_handlers[port].handler;
if (strict) {
if (handler == default_inout)
return -1;
for (i = 1; i < bytes; i++) {
if (inout_handlers[port + i].handler != handler)
return -1;
}
}
flags = inout_handlers[port].flags;
arg = inout_handlers[port].arg;