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author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-09 22:09:41 +0200 |
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committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-30 17:56:34 +0200 |
commit | abe3265a6d2e5e805361e0fea3346622f3199d68 (patch) | |
tree | ff4c4463c2715fc06a62916a4a9d5fa28c996214 /arch/tile/kernel | |
parent | tile: allow "initrd" boot argument for kexec (diff) | |
download | linux-abe3265a6d2e5e805361e0fea3346622f3199d68.tar.xz linux-abe3265a6d2e5e805361e0fea3346622f3199d68.zip |
tile: do less L1 I-cache eviction
We had been doing an automatic full eviction of the L1 I$
everywhere whenever we did a kernel-space TLB flush. It turns
out this isn't necessary, since all the callers already handle
doing a flush if necessary.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/kernel')
-rw-r--r-- | arch/tile/kernel/tlb.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/tile/kernel/tlb.c b/arch/tile/kernel/tlb.c index 3fd54d5bbd4c..f23b53515671 100644 --- a/arch/tile/kernel/tlb.c +++ b/arch/tile/kernel/tlb.c @@ -91,8 +91,14 @@ void flush_tlb_all(void) } } +/* + * Callers need to flush the L1I themselves if necessary, e.g. for + * kernel module unload. Otherwise we assume callers are not using + * executable pgprot_t's. Using EVICT_L1I means that dataplane cpus + * will get an unnecessary interrupt otherwise. + */ void flush_tlb_kernel_range(unsigned long start, unsigned long end) { - flush_remote(0, HV_FLUSH_EVICT_L1I, cpu_online_mask, + flush_remote(0, 0, NULL, start, end - start, PAGE_SIZE, cpu_online_mask, NULL, 0); } |