diff options
| author | Will Deacon <[email protected]> | 2021-07-30 12:42:31 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <[email protected]> | 2021-07-31 22:28:39 -0400 |
| commit | a449ffaf9181b5a2dc705d8a06b13e0068207fd4 (patch) | |
| tree | efaf6034731a554228dc160e211fc25f9fc0baf1 /include/linux/spi/spi.h | |
| parent | 93ebb6828723b8aef114415c4dc3518342f7dcad (diff) | |
powerpc/svm: Don't issue ultracalls if !mem_encrypt_active()
Commit ad6c00283163 ("swiotlb: Free tbl memory in swiotlb_exit()")
introduced a set_memory_encrypted() call to swiotlb_exit() so that the
buffer pages are returned to an encrypted state prior to being freed.
Sachin reports that this leads to the following crash on a Power server:
[ 0.010799] software IO TLB: tearing down default memory pool
[ 0.010805] ------------[ cut here ]------------
[ 0.010808] kernel BUG at arch/powerpc/kernel/interrupt.c:98!
Nick spotted that this is because set_memory_encrypted() is issuing an
ultracall which doesn't exist for the processor, and should therefore
be gated by mem_encrypt_active() to mirror the x86 implementation.
Cc: Konrad Rzeszutek Wilk <[email protected]>
Cc: Claire Chang <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Robin Murphy <[email protected]>
Fixes: ad6c00283163 ("swiotlb: Free tbl memory in swiotlb_exit()")
Suggested-by: Nicholas Piggin <[email protected]>
Reported-by: Sachin Sant <[email protected]>
Tested-by: Sachin Sant <[email protected]>
Tested-by: Nathan Chancellor <[email protected]>
Link: https://lore.kernel.org/r/[email protected]/
Signed-off-by: Will Deacon <[email protected]>
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
Diffstat (limited to 'include/linux/spi/spi.h')
0 files changed, 0 insertions, 0 deletions