Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b206590c authored by Anton Blanchard's avatar Anton Blanchard Committed by Benjamin Herrenschmidt
Browse files

powerpc: Fix comment explaining our VSID layout 



We support 16TB of user address space and half a million contexts
so update the comment to reflect this.

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 9f5072d4

arch/powerpc/include/asm/mmu-hash64.h

+3 −4
Original line number Original line Diff line number Diff line
@@ -312,10 +312,9 @@ extern void slb_set_size(u16 size); 
 * (i.e. everything above 0xC000000000000000), except the very top

 * (i.e. everything above 0xC000000000000000), except the very top

 * segment, which simplifies several things.

 * segment, which simplifies several things.

 *

 *

 * 	- We allow for 15 significant bits of ESID and 20 bits of

 *	- We allow for 16 significant bits of ESID and 19 bits of

 * context for user addresses.  i.e. 8T (43 bits) of address space for

 * context for user addresses.  i.e. 16T (44 bits) of address space for

 * up to 1M contexts (although the page table structure and context

 * up to half a million contexts.

 * allocation will need changes to take advantage of this).

 *

 *

 * 	- The scramble function gives robust scattering in the hash

 * 	- The scramble function gives robust scattering in the hash

 * table (at least based on some initial results).  The previous

 * table (at least based on some initial results).  The previous