gh0s7/mckernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

add page fault forwarding

Browse Source
This commit is contained in:
NAKAMURA Gou
2013-08-07 19:48:01 +09:00
parent 480f6d4c2f
commit 591f398768
8 changed files with 310 additions and 64 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
kernel/syscall.c
View File

@ -92,6 +92,7 @@ static void send_syscall(struct syscall_request *req)
memcpy_async_wait(&fin);
barrier();
cpu_local_var(scp).request_va->valid = 1;
*(unsigned int *)cpu_local_var(scp).doorbell_va = w;
@ -108,6 +109,8 @@ static void send_syscall(struct syscall_request *req)
int do_syscall(struct syscall_request *req, ihk_mc_user_context_t *ctx)
{
struct syscall_response *res = cpu_local_var(scp).response_va;
struct syscall_request req2;
int error;
dkprintf("SC(%d)[%3d] sending syscall\n",
ihk_mc_get_processor_id(),
@ -119,10 +122,29 @@ int do_syscall(struct syscall_request *req, ihk_mc_user_context_t *ctx)
ihk_mc_get_processor_id(),
req->number);
while (!res->status) {
cpu_pause();
}
#define STATUS_IN_PROGRESS 0
#define STATUS_COMPLETED 1
#define STATUS_PAGE_FAULT 3
while (res->status != STATUS_COMPLETED) {
while (res->status == STATUS_IN_PROGRESS) {
cpu_pause();
}
if (res->status == STATUS_PAGE_FAULT) {
error = page_fault_process(cpu_local_var(current),
(void *)res->fault_address,
res->fault_reason);
/* send result */
req2.number = __NR_mmap;
#define PAGER_RESUME_PAGE_FAULT 0x0101
req2.args[0] = PAGER_RESUME_PAGE_FAULT;
req2.args[1] = error;
send_syscall(&req2);
}
}
dkprintf("SC(%d)[%3d] got host reply: %d \n",
ihk_mc_get_processor_id(),
req->number, res->ret);
@ -399,7 +421,7 @@ SYSCALL_DECLARE(mmap)
vrflags |= VR_IO_NOCACHE;
}
#endif
else if ((len == 64*1024*1024) || (len == 128*1024*1024)) {
else {
vrflags |= VR_DEMAND_PAGING;
}
}