diff options
| author | Michael Kelly <mike@weatherwax.co.uk> | 2025-08-31 23:21:54 +0200 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2025-08-31 23:21:54 +0200 |
| commit | fdfca0e86009c5a7b188fa39e939de800a73391d (patch) | |
| tree | d590b5ebe43d1ed21fd5dbae75240031e99b34a8 /kern/ipc_kobject.h | |
| parent | eec7037c885f6e54bf8f22d421d6abc55a2cd667 (diff) | |
Add mach_port_set_ktype RPC to set ktype of a user port
For now, we only allow a newly-introduced MACH_PORT_KTYPE_USER_DEVICE type
that makes ipc_kmsg_copyin_body use page lists, which keep them in a busy
state that prevents them from being paged out.
Diffstat (limited to 'kern/ipc_kobject.h')
| -rw-r--r-- | kern/ipc_kobject.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/kern/ipc_kobject.h b/kern/ipc_kobject.h index 606a66a9..63ad87c5 100644 --- a/kern/ipc_kobject.h +++ b/kern/ipc_kobject.h @@ -77,9 +77,10 @@ typedef unsigned int ipc_kobject_type_t; #define IKOT_CLOCK 25 #define IKOT_CLOCK_CTRL 26 #define IKOT_PAGER_PROXY 27 +#define IKOT_USER_DEVICE 28 /* << new entries here */ -#define IKOT_UNKNOWN 28 /* magic catchall */ -#define IKOT_MAX_TYPE 29 /* # of IKOT_ types */ +#define IKOT_UNKNOWN 29 /* magic catchall */ +#define IKOT_MAX_TYPE 30 /* # of IKOT_ types */ /* Please keep ipc/ipc_object.c:ikot_print_array up to date */ #define is_ipc_kobject(ikot) (ikot != IKOT_NONE) @@ -90,7 +91,9 @@ typedef unsigned int ipc_kobject_type_t; */ #define ipc_kobject_vm_page_list(ikot) \ - ((ikot == IKOT_PAGING_REQUEST) || (ikot == IKOT_DEVICE)) + ((ikot == IKOT_PAGING_REQUEST) || \ + (ikot == IKOT_DEVICE) || \ + (ikot == IKOT_USER_DEVICE)) #define ipc_kobject_vm_page_steal(ikot) (ikot == IKOT_PAGING_REQUEST) |