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arm64: fix free queue and reservation configuration for 16KB pages

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Correctly configure the free page queues and the reservation size when
the base page size is 16KB.  In particular, the reservation size was
less than the L2 Block size, making L2 promotions and mappings all but
impossible.

Reviewed by:	markj
Tested by:	gallatin
Differential Revision:	https://reviews.freebsd.org/D42737
This commit is contained in:
Eliot Solomon 2023-11-18 15:13:21 -06:00 committed by Alan Cox
parent a03aff88a1
commit 9fabf97682
2 changed files with 18 additions and 1 deletions
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1
sys/arm64/arm64/copyinout.S
View file

@ -30,6 +30,7 @@
#include <machine/asm.h>
#include <sys/errno.h>
#include <machine/param.h>
#include <machine/vmparam.h>
#include "assym.inc"

18
sys/arm64/include/vmparam.h
View file

@ -99,8 +99,17 @@
* are used by UMA, the physical memory allocator reduces the likelihood of
* both 2MB page TLB misses and cache misses during the page table walk when
* a 2MB page TLB miss does occur.
*
* When PAGE_SIZE is 16KB, an allocation size of 32MB is supported. This
* size is used by level 0 reservations and L2 BLOCK mappings.
*/
#if PAGE_SIZE == PAGE_SIZE_4K
#define VM_NFREEORDER 13
#elif PAGE_SIZE == PAGE_SIZE_16K
#define VM_NFREEORDER 12
#else
#error Unsupported page size
#endif
/*
* Enable superpage reservations: 1 level.
@ -110,10 +119,17 @@
#endif
/*
* Level 0 reservations consist of 512 pages.
* Level 0 reservations consist of 512 pages when PAGE_SIZE is 4KB, and
* 2048 pages when PAGE_SIZE is 16KB.
*/
#ifndef VM_LEVEL_0_ORDER
#if PAGE_SIZE == PAGE_SIZE_4K
#define VM_LEVEL_0_ORDER 9
#elif PAGE_SIZE == PAGE_SIZE_16K
#define VM_LEVEL_0_ORDER 11
#else
#error Unsupported page size
#endif
#endif
/**