diff options
| author | Michael Ellerman <mpe@ellerman.id.au> | 2018-07-19 14:37:57 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-07-19 14:37:57 +1000 |
| commit | ce57c6610cc2d7cde61fc005a2d2090bce46fc73 (patch) | |
| tree | be1230fb1773e3de7fb7f6a0adde68ca0468273e /arch/powerpc/kernel/process.c | |
| parent | 9c3250a127901c93b23723dc5859c71a0d068fb8 (diff) | |
| parent | a68bd1267b7286b1687905651b404e765046de25 (diff) | |
Merge branch 'topic/ppc-kvm' into next
Merge in some commits we're sharing with the KVM tree.
I manually propagated the change from commit d3d4ffaae439
("powerpc/powernv/ioda2: Reduce upper limit for DMA window size") into
pci-ioda-tce.c.
Conflicts:
arch/powerpc/include/asm/cputable.h
arch/powerpc/platforms/powernv/pci-ioda.c
arch/powerpc/platforms/powernv/pci.h
Diffstat (limited to 'arch/powerpc/kernel/process.c')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 9ef4aea9fffe..27f0caee55ea 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -1250,17 +1250,9 @@ struct task_struct *__switch_to(struct task_struct *prev, * mappings. If the new process has the foreign real address * mappings, we must issue a cp_abort to clear any state and * prevent snooping, corruption or a covert channel. - * - * DD1 allows paste into normal system memory so we do an - * unpaired copy, rather than cp_abort, to clear the buffer, - * since cp_abort is quite expensive. */ - if (current_thread_info()->task->thread.used_vas) { + if (current_thread_info()->task->thread.used_vas) asm volatile(PPC_CP_ABORT); - } else if (cpu_has_feature(CPU_FTR_POWER9_DD1)) { - asm volatile(PPC_COPY(%0, %1) - : : "r"(dummy_copy_buffer), "r"(0)); - } } #endif /* CONFIG_PPC_BOOK3S_64 */ |