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devobj: allow read only device file mappings (OFED 3.3 support)

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Balazs Gerofi
2016-06-21 06:57:47 +09:00
parent d90900b6e6
commit a83ad620c8
4 changed files with 11 additions and 6 deletions
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4
kernel/devobj.c
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@@ -78,7 +78,8 @@ static struct memobj *to_memobj(struct devobj *devobj)
/***********************************************************************
* devobj
*/
int devobj_create(int fd, size_t len, off_t off, struct memobj **objp, int *maxprotp)
int devobj_create(int fd, size_t len, off_t off, struct memobj **objp, int *maxprotp,
int prot)
{
ihk_mc_user_context_t ctx;
struct pager_map_result result; // XXX: assumes contiguous physical
@@ -115,6 +116,7 @@ int devobj_create(int fd, size_t len, off_t off, struct memobj **objp, int *maxp
ihk_mc_syscall_arg2(&ctx) = len;
ihk_mc_syscall_arg3(&ctx) = off;
ihk_mc_syscall_arg4(&ctx) = virt_to_phys(&result);
ihk_mc_syscall_arg5(&ctx) = prot;
error = syscall_generic_forwarding(__NR_mmap, &ctx);
if (error) {