Konstantin Belousov 52f3c44efe Fix two issues with /dev/mem access on amd64, both causing kernel page ... faults. First, for accesses to direct map region should check for the limit by which direct map is instantiated. Second, for accesses to the kernel map, success returned from the kernacc(9) does not guarantee that consequent attempt to read or write to the checked address succeed, since other thread might invalidate the address meantime. Add a new thread private flag TDP_DEVMEMIO, which instructs vm_fault() to return error when fault happens on the MAP_ENTRY_NOFAULT entry, instead of panicing. The trap handler would then see a page fault from access, and recover in normal way, making /dev/mem access safer. Remove GIANT_REQUIRED from the amd64 memrw(), since it is not needed and having Giant locked does not solve issues for amd64. Note that at least the second issue exists on other architectures, and requires similar patching for md code. Reported and tested by: clusteradm (gjb, sbruno) Sponsored by: The FreeBSD Foundation MFC after: 1 week		2014-03-21 14:25:09 +00:00
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_vm_radix.h	On all the architectures, avoid to preallocate the physical memory	2013-08-09 11:28:55 +00:00
default_pager.c	Switch the vm_object mutex to be a rwlock. This will enable in the	2013-03-09 02:32:23 +00:00
device_pager.c	Initialize paddr to handle the case of zero size.	2014-03-12 16:38:55 +00:00
memguard.c	- Add a statically allocated memguard arena since it is needed very early	2013-08-13 22:40:43 +00:00
memguard.h	Replace kernel virtual address space allocation with vmem. This provides	2013-08-07 06:21:20 +00:00
phys_pager.c	The soft and hard busy mechanism rely on the vm object lock to work.	2013-08-09 11:11:11 +00:00
pmap.h	The pmap function pmap_clear_reference() is no longer used. Remove it.	2013-09-20 04:30:18 +00:00
redzone.c	Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.	2011-11-07 15:43:11 +00:00
redzone.h
sg_pager.c	Different consumers of the struct vm_page abuse pageq member to keep	2013-08-10 17:36:42 +00:00
swap_pager.c	vm_page_grab() and vm_pager_get_pages() can drop the vm_object lock,	2014-03-19 01:13:42 +00:00
swap_pager.h	Do not map the swap i/o pbufs if the geom provider for the swap	2013-03-19 14:39:27 +00:00
uma_core.c	After r251709, avoid a clang 3.4 warning about an unused static const	2014-02-14 17:47:18 +00:00
uma_dbg.c	- Add a per-zone lock for zones without kegs.	2013-06-20 19:08:12 +00:00
uma_dbg.h
uma_int.h	Implement soft pressure on UMA cache bucket sizes.	2013-11-19 10:05:53 +00:00
uma.h	Create two public UMA_ZONE_PCPU zones: 64 bit sized and pointer sized.	2014-02-10 19:59:46 +00:00
vm_extern.h	Merge the following changes from projects/bhyve_npt_pmap:	2013-09-20 17:06:49 +00:00
vm_fault.c	Fix two issues with /dev/mem access on amd64, both causing kernel page	2014-03-21 14:25:09 +00:00
vm_glue.c	Remove the deprecated VM_ALLOC_RETRY flag for the vm_page_grab(9).	2013-08-22 07:39:53 +00:00
vm_init.c	Add a mmap flag (MAP_32BIT) on 64-bit platforms to request that a mapping use	2013-09-09 18:11:59 +00:00
vm_kern.c	Add a mmap flag (MAP_32BIT) on 64-bit platforms to request that a mapping use	2013-09-09 18:11:59 +00:00
vm_kern.h	- Add a statically allocated memguard arena since it is needed very early	2013-08-13 22:40:43 +00:00
vm_map.c	Initialize vm_map_entry member wiring_thread on the map entry creation.	2014-03-21 13:55:57 +00:00
vm_map.h	Add a mmap flag (MAP_32BIT) on 64-bit platforms to request that a mapping use	2013-09-09 18:11:59 +00:00
vm_meter.c	Switch the vm_object mutex to be a rwlock. This will enable in the	2013-03-09 02:32:23 +00:00
vm_mmap.c	Update kernel inclusions of capability.h to use capsicum.h instead; some	2014-03-16 10:55:57 +00:00
vm_object.c	Do not vdrop() the tmpfs vnode until it is unlocked. The hold	2014-03-12 15:13:57 +00:00
vm_object.h	On all the architectures, avoid to preallocate the physical memory	2013-08-09 11:28:55 +00:00
vm_page.c	In an effort to diagnose possible corruption of struct vm_page on some	2014-01-24 19:08:42 +00:00
vm_page.h	Since the introduction of the popmap to reservations in r259999, there is	2013-12-31 18:25:15 +00:00
vm_pageout.c	Fix a couple of typos.	2014-01-21 03:27:47 +00:00
vm_pageout.h	Move what remains of vm/vm_contig.c into vm/vm_pageout.c, where similar	2012-07-18 05:21:34 +00:00
vm_pager.c	- Add a general purpose resource allocator, vmem, from NetBSD. It was	2013-06-28 03:51:20 +00:00
vm_pager.h	- Add a general purpose resource allocator, vmem, from NetBSD. It was	2013-06-28 03:51:20 +00:00
vm_param.h	Remove unused definition for CTL_VM_NAMES.	2013-08-09 23:47:43 +00:00
vm_phys.c	Since the introduction of the popmap to reservations in r259999, there is	2013-12-31 18:25:15 +00:00
vm_phys.h	Split the pagequeues per NUMA domains, and split pageademon process	2013-08-07 16:36:38 +00:00
vm_radix.c	Eliminate a redundant parameter to vm_radix_replace().	2013-12-08 20:07:02 +00:00
vm_radix.h	Eliminate a redundant parameter to vm_radix_replace().	2013-12-08 20:07:02 +00:00
vm_reserv.c	Add "popmap" assertions: The page being freed isn't already free, and the	2013-12-29 04:54:52 +00:00
vm_reserv.h	Refactor vm_page_alloc()'s interactions with vm_reserv_alloc_page() and	2013-05-12 16:50:18 +00:00
vm_unix.c	- Improve readability of sys_obreak().	2013-01-11 09:58:35 +00:00
vm_zeroidle.c	Split the pagequeues per NUMA domains, and split pageademon process	2013-08-07 16:36:38 +00:00
vm.h	rename scheduler->swapper and SI_SUB_RUN_SCHEDULER->SI_SUB_LAST	2013-07-24 09:45:31 +00:00
vnode_pager.c	ANSIfy declarations.	2014-01-20 18:47:56 +00:00
vnode_pager.h	Account the writeable shared mappings backed by file in the vnode	2012-02-23 21:07:16 +00:00