| Message ID | 20180506072949.12783-1-npiggin@gmail.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | [QEMU] osdep: powerpc64 align memory to allow 2MB radix THP page tables | expand |
On Sun, May 06, 2018 at 05:29:49PM +1000, Nicholas Piggin wrote: > This allows KVM with the Book3S radix MMU mode to take advantage of > THP and install larger pages in the partition scope page tables (the > host translation). > > Signed-off-by: Nicholas Piggin <npiggin@gmail.com> I've applied this to my ppc-for-3.0 tree. It's not strictly within the code I maintain, but since it only affects ppc, it seems reasonable to go through my tree. > --- > include/qemu/osdep.h | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h > index 41658060a7..5910682221 100644 > --- a/include/qemu/osdep.h > +++ b/include/qemu/osdep.h > @@ -357,7 +357,8 @@ void qemu_anon_ram_free(void *ptr, size_t size); > #endif > > #if defined(__linux__) && \ > - (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__)) > + (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) \ > + || defined(__powerpc64__)) > /* Use 2 MiB alignment so transparent hugepages can be used by KVM. > Valgrind does not support alignments larger than 1 MiB, > therefore we need special code which handles running on Valgrind. */
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index 41658060a7..5910682221 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -357,7 +357,8 @@ void qemu_anon_ram_free(void *ptr, size_t size); #endif #if defined(__linux__) && \ - (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__)) + (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) \ + || defined(__powerpc64__)) /* Use 2 MiB alignment so transparent hugepages can be used by KVM. Valgrind does not support alignments larger than 1 MiB, therefore we need special code which handles running on Valgrind. */
This allows KVM with the Book3S radix MMU mode to take advantage of THP and install larger pages in the partition scope page tables (the host translation). Signed-off-by: Nicholas Piggin <npiggin@gmail.com> --- include/qemu/osdep.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)