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| author | Joerg Roedel <jroedel@suse.de> | 2017-08-10 16:58:18 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2017-08-15 18:23:52 +0200 |
| commit | 9a005a800ae817c2c90ef117d7cd77614d866777 (patch) | |
| tree | 380a778f1cf83c7033eb74c240dd821d5ada21fc /include/linux/iova.h | |
| parent | 8109c2a2f8463852dddd6a1c3fcf262047c0c124 (diff) | |
| download | lwn-9a005a800ae817c2c90ef117d7cd77614d866777.tar.gz lwn-9a005a800ae817c2c90ef117d7cd77614d866777.zip | |
iommu/iova: Add flush timer
Add a timer to flush entries from the Flush-Queues every
10ms. This makes sure that no stale TLB entries remain for
too long after an IOVA has been unmapped.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/iova.h')
| -rw-r--r-- | include/linux/iova.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/iova.h b/include/linux/iova.h index 913a690cd4b0..d179b9bf7814 100644 --- a/include/linux/iova.h +++ b/include/linux/iova.h @@ -48,6 +48,9 @@ typedef void (* iova_entry_dtor)(unsigned long data); /* Number of entries per Flush Queue */ #define IOVA_FQ_SIZE 256 +/* Timeout (in ms) after which entries are flushed from the Flush-Queue */ +#define IOVA_FQ_TIMEOUT 10 + /* Flush Queue entry for defered flushing */ struct iova_fq_entry { unsigned long iova_pfn; @@ -86,6 +89,11 @@ struct iova_domain { atomic64_t fq_flush_finish_cnt; /* Number of TLB flushes that have been finished */ + + struct timer_list fq_timer; /* Timer to regularily empty the + flush-queues */ + atomic_t fq_timer_on; /* 1 when timer is active, 0 + when not */ }; static inline unsigned long iova_size(struct iova *iova) |