system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-07-22 18:56:38 +00:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity

powerpc64: make radix with superpages default

Browse source 
As Radix MMU with superpages enabled is now stable, make it the
default choice on supported hardware (POWER9 and above), since its
performance is greater than that of HPT MMU.

Reviewed by:		alfredo, jhibbits
Sponsored by:		Instituto de Pesquisas Eldorado (eldorado.org.br)
Differential Revision:	https://reviews.freebsd.org/D30797
This commit is contained in:
Leandro Lupori 2021-10-14 13:13:27 -03:00
parent 168b579a48
commit 8ecf9a8bab
3 changed files with 7 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
stand/powerpc/ofw/cas.c
View file

@ -232,10 +232,10 @@ ppc64_cas(void)
}
}
if (radix_mmu && (var = getenv("radix_mmu")) != NULL && var[0] != '0')
ov5[OV5_MMU_INDEX] = OV5_MMU_RADIX;
else
if ((var = getenv("radix_mmu")) != NULL && var[0] == '0')
radix_mmu = 0;
if (radix_mmu)
ov5[OV5_MMU_INDEX] = OV5_MMU_RADIX;
inst = OF_open("/");
if (inst == -1) {

4
sys/powerpc/aim/aim_machdep.c
View file

@ -586,8 +586,10 @@ pmap_early_io_map_init(void)
{
if ((cpu_features2 & PPC_FEATURE2_ARCH_3_00) == 0)
radix_mmu = 0;
else
else {
radix_mmu = 1;
TUNABLE_INT_FETCH("radix_mmu", &radix_mmu);
}
/*
* When using Radix, set the start and end of kva early, to be able to

2
sys/powerpc/powerpc/pmap_dispatch.c
View file

@ -83,7 +83,7 @@ int vm_level_0_order = 9;
SYSCTL_NODE(_vm, OID_AUTO, pmap, CTLFLAG_RD, 0, "VM/pmap parameters");
int superpages_enabled = 0;
int superpages_enabled = 1;
SYSCTL_INT(_vm_pmap, OID_AUTO, superpages_enabled, CTLFLAG_RDTUN,
&superpages_enabled, 0, "Enable support for transparent superpages");