On Thu, Jun 25, 2020 at 08:13:09AM -0400, Stefan Berger wrote: > On 6/25/20 12:24 AM, Jarkko Sakkinen wrote: > > Re-allocate context and session buffers when needed. Scale them in page > > increments so that the reallocation is only seldomly required, and thus > > causes minimal stress to the system. Add a static maximum limit of four > > pages for buffer sizes. > > > > Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> > > Suggested-by: Stefan Berger <stefanb@xxxxxxxxxxxxx> > > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx> > > --- > > Tested only for compilation. > > drivers/char/tpm/tpm2-space.c | 80 ++++++++++++++++++++++++----------- > > include/linux/tpm.h | 6 ++- > > 2 files changed, 59 insertions(+), 27 deletions(-) > > > > diff --git a/drivers/char/tpm/tpm2-space.c b/drivers/char/tpm/tpm2-space.c > > index 982d341d8837..acb9e82bf9e8 100644 > > --- a/drivers/char/tpm/tpm2-space.c > > +++ b/drivers/char/tpm/tpm2-space.c > > @@ -15,6 +15,8 @@ > > #include <asm/unaligned.h> > > #include "tpm.h" > > +#define TPM2_SPACE_MAX_BUFFER_SIZE (4 * PAGE_SIZE) > > PAGE_SIZE is 64k on ppc64. Rather use 4 * 4096? Better to then just put it as 16384. /Jarkko
