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| author | Konstantin Belousov <kib@FreeBSD.org> | 2019-03-16 11:31:01 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2019-03-16 11:31:01 +0000 |
| commit | 6f1fe3305a2be0a1395569b2ea5f56a93e491ae0 (patch) | |
| tree | a4dc6f513504def0942459570f83fe798336d04e /sys/sparc64 | |
| parent | c1c120b2cb8ece606766642dc20bff611fa89d22 (diff) | |
amd64: Add md process flags and first P_MD_PTI flag.
PTI mode for the process pmap on exec is activated iff P_MD_PTI is set.
On exec, the existing vmspace can be reused only if pti mode of the
pmap matches the P_MD_PTI flag of the process. Add MD
cpu_exec_vmspace_reuse() callback for exec_new_vmspace() which can
vetoed reuse of the existing vmspace.
MFC note: md_flags change struct proc KBI.
Reviewed by: jhb, markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D19514
Notes
Notes:
svn path=/head/; revision=345227
Diffstat (limited to 'sys/sparc64')
| -rw-r--r-- | sys/sparc64/sparc64/vm_machdep.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/sparc64/sparc64/vm_machdep.c b/sys/sparc64/sparc64/vm_machdep.c index d3966910888f..a4a316e0bc86 100644 --- a/sys/sparc64/sparc64/vm_machdep.c +++ b/sys/sparc64/sparc64/vm_machdep.c @@ -373,6 +373,13 @@ cpu_fork_kthread_handler(struct thread *td, void (*func)(void *), void *arg) fp->fr_local[1] = (u_long)arg; } +bool +cpu_exec_vmspace_reuse(struct proc *p __unused, vm_map_t map __unused) +{ + + return (true); +} + int is_physical_memory(vm_paddr_t addr) { |