Le 04/10/2018 à 10:23, Aneesh Kumar K.V a écrit :
On 10/4/18 1:50 PM, Christophe LEROY wrote:
Le 03/10/2018 à 06:24, Nicholas Piggin a écrit :
On Mon, 1 Oct 2018 12:30:19 +0000 (UTC)
Christophe Leroy <christophe.le...@c-s.fr> wrote:
When activating CONFIG_THREAD_INFO_IN_TASK, linux/sched.h
includes asm/current.h. This generates a circular dependency.
To avoid that, asm/processor.h shall not be included in mmu-hash.h
In order to do that, this patch moves into a new header called
asm/task_size.h the information from asm/processor.h requires by
mmu-hash.h
Doesn't look like you use this header in 32-bit code. Put task_size.h
in asm/64/ maybe?
There is no asm/64/ dir at the time being, only book3s/64/ and nohash/64/
I'm thinking about leaving it in asm/ but renaming it task_size_user64.h
Quiet a lot of that is book3s 64 specifi because we have there.
#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_PPC_64K_PAGES)
/*
* Max value currently used:
*/
We have an #if / #else
#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_PPC_64K_PAGES)
/*
* Max value currently used:
*/
#define TASK_SIZE_USER64 TASK_SIZE_4PB
#define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_128TB
#define TASK_CONTEXT_SIZE TASK_SIZE_512TB
#else
#define TASK_SIZE_USER64 TASK_SIZE_64TB
#define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_64TB
/*
* We don't need to allocate extended context ids for 4K page size, because
* we limit the max effective address on this config to 64TB.
*/
#define TASK_CONTEXT_SIZE TASK_SIZE_64TB
#endif
And processor .h derives several other consts applying to both BOOK3S64
et BOOK3E64 from that.
And arch/powerpc/mm/pgtable-book3e.c has:
BUILD_BUG_ON(TASK_SIZE_USER64 > PGTABLE_RANGE);
Christophe
