Add the VM_MEMATTR_WRITE_THROUGH memory type to arm64 and use it to support
VM_MEMATTR_WRITE_COMBINING in the kernel. This fixes a bug where Xorg would use write back cached memory for its graphics buffers. This would produce artifacts on the screen as cachelines were written to memory. MFC after: 1 week Sponsored by: DARPA, AFRL
This commit is contained in:
parent
f1ec210574
commit
c031b4b01e
@ -30,9 +30,15 @@
|
||||
#define _MACHINE_VM_H_
|
||||
|
||||
/* Memory attribute configuration. */
|
||||
#define VM_MEMATTR_DEVICE 0
|
||||
#define VM_MEMATTR_UNCACHEABLE 1
|
||||
#define VM_MEMATTR_WRITE_BACK 2
|
||||
#define VM_MEMATTR_DEVICE 0
|
||||
#define VM_MEMATTR_UNCACHEABLE 1
|
||||
#define VM_MEMATTR_WRITE_BACK 2
|
||||
#define VM_MEMATTR_WRITE_THROUGH 3
|
||||
|
||||
#ifdef _KERNEL
|
||||
/* If defined vmstat will try to use both of these in a switch statement */
|
||||
#define VM_MEMATTR_WRITE_COMBINING VM_MEMATTR_WRITE_THROUGH
|
||||
#endif
|
||||
|
||||
#define VM_MEMATTR_DEFAULT VM_MEMATTR_WRITE_BACK
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user