diff options
| author | Helge Deller <deller@gmx.de> | 2023-09-01 16:09:23 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2023-09-07 09:12:19 +0200 |
| commit | 70bd68d5b61a63f87b5e986d9100c8ce46c5df4d (patch) | |
| tree | e37573c48bd791624035c9395e135e7cacc80a51 /arch/parisc | |
| parent | 3f091387a39795812aab4303949bbc9baa22c077 (diff) | |
parisc: Prepare for Block-TLB support on 32-bit kernel
Change HUGEPAGE_SIZE to become 4 MB on 32-bit kernels, which leads
that kernel code and kernel data will start on 4 MB boundaries.
Although a 32-bit kernel does not support huge pages, most
machines have support for Block-TLBs (BTLB) which allow to
configure the system to use large pages (block TLBs) to minimize
the TLB contention. This is done through calls to PDC and the
32-bit kernel can then call BTLB PDC functions to tell
the machine to optimize the TLBs.
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/kernel/asm-offsets.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/parisc/kernel/asm-offsets.c b/arch/parisc/kernel/asm-offsets.c index 94652e13c260..757816a7bd4b 100644 --- a/arch/parisc/kernel/asm-offsets.c +++ b/arch/parisc/kernel/asm-offsets.c @@ -275,6 +275,8 @@ int main(void) * and kernel data on physical huge pages */ #ifdef CONFIG_HUGETLB_PAGE DEFINE(HUGEPAGE_SIZE, 1UL << REAL_HPAGE_SHIFT); +#elif !defined(CONFIG_64BIT) + DEFINE(HUGEPAGE_SIZE, 4*1024*1024); #else DEFINE(HUGEPAGE_SIZE, PAGE_SIZE); #endif |