diff options
| author | Sebastian Ott <[email protected]> | 2016-09-08 13:44:57 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <[email protected]> | 2016-11-17 07:10:08 +0100 |
| commit | 4f5359e94bbfbe349fd1ae00516dfe749d53fe22 (patch) | |
| tree | 7e3ba089f8df67aa0219c41691939af49975c271 /tools/lib/api/debug.c | |
| parent | 6b7df3ce92ac82ec3f4a2953b6fed77da7b38aaa (diff) | |
s390/pci_dma: make lazy flush independent from the tlb_refresh bit
We have 2 strategies to reduce the number of RPCIT instructions:
* A HW feature indicated via the tlb_refresh bit allows us to omit RPCIT for
invalid -> valid translation-table entry updates.
* With "lazy flush" we omit RPCIT for valid -> invalid updates until we run
out of dma addresses. When we have to reuse dma addresses we issue a global
tlb flush using only one RPCIT instruction.
Currently lazy flushing depends on tlb_refresh. Since there is no technical
reason for this remove this dependency.
Signed-off-by: Sebastian Ott <[email protected]>
Reviewed-by: Gerald Schaefer <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
Diffstat (limited to 'tools/lib/api/debug.c')
0 files changed, 0 insertions, 0 deletions