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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: linux-mm@kvack.org, akpm@linux-foundation.org,
	mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org,
	npiggin@gmail.com, christophe.leroy@csgroup.eu
Cc: Oscar Salvador <osalvador@suse.de>,
	Mike Kravetz <mike.kravetz@oracle.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Joao Martins <joao.m.martins@oracle.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Muchun Song <muchun.song@linux.dev>,
	Will Deacon <will@kernel.org>,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: [PATCH v5 01/13] mm/hugepage pud: Allow arch-specific helper function to check huge page pud support
Date: Tue, 18 Jul 2023 07:59:21 +0530	[thread overview]
Message-ID: <20230718022934.90447-2-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20230718022934.90447-1-aneesh.kumar@linux.ibm.com>

Architectures like powerpc would like to enable transparent huge page pud
support only with radix translation. To support that add
has_transparent_pud_hugepage() helper that architectures can override.

Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 drivers/nvdimm/pfn_devs.c | 2 +-
 include/linux/pgtable.h   | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index af7d9301520c..18ad315581ca 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c
@@ -100,7 +100,7 @@ static unsigned long *nd_pfn_supported_alignments(unsigned long *alignments)
 
 	if (has_transparent_hugepage()) {
 		alignments[1] = HPAGE_PMD_SIZE;
-		if (IS_ENABLED(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD))
+		if (has_transparent_pud_hugepage())
 			alignments[2] = HPAGE_PUD_SIZE;
 	}
 
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index 5063b482e34f..cf13f8d938a8 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -1499,6 +1499,9 @@ typedef unsigned int pgtbl_mod_mask;
 #define has_transparent_hugepage() IS_BUILTIN(CONFIG_TRANSPARENT_HUGEPAGE)
 #endif
 
+#ifndef has_transparent_pud_hugepage
+#define has_transparent_pud_hugepage() IS_BUILTIN(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD)
+#endif
 /*
  * On some architectures it depends on the mm if the p4d/pud or pmd
  * layer of the page table hierarchy is folded or not.
-- 
2.41.0



  reply	other threads:[~2023-07-18  2:30 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-18  2:29 [PATCH v5 00/13] Add support for DAX vmemmap optimization for ppc64 Aneesh Kumar K.V
2023-07-18  2:29 ` Aneesh Kumar K.V [this message]
2023-07-18  2:29 ` [PATCH v5 04/13] mm/vmemmap: Allow architectures to override how vmemmap optimization works Aneesh Kumar K.V
2023-07-18  2:29 ` [PATCH v5 05/13] mm: Add pud_same similar to __HAVE_ARCH_P4D_SAME Aneesh Kumar K.V
2023-07-18  2:29 ` [PATCH v5 07/13] mm/vmemmap optimization: Split hugetlb and devdax vmemmap optimization Aneesh Kumar K.V
2023-07-18  2:29 ` [PATCH v5 08/13] powerpc/mm/trace: Convert trace event to trace event class Aneesh Kumar K.V
2023-07-18  2:29 ` [PATCH v5 09/13] powerpc/book3s64/mm: Enable transparent pud hugepage Aneesh Kumar K.V
2023-07-18  2:29 ` [PATCH v5 10/13] powerpc/book3s64/vmemmap: Switch radix to use a different vmemmap handling function Aneesh Kumar K.V
2023-07-24 18:29   ` Aneesh Kumar K.V
2023-07-24 18:48     ` Andrew Morton
2023-07-18  2:29 ` [PATCH v5 11/13] powerpc/book3s64/radix: Add support for vmemmap optimization for radix Aneesh Kumar K.V
2023-07-18  2:29 ` [PATCH v5 12/13] powerpc/book3s64/radix: Remove mmu_vmemmap_psize Aneesh Kumar K.V
2023-07-18  2:29 ` [PATCH v5 13/13] powerpc/book3s64/radix: Add debug message to give more details of vmemmap allocation Aneesh Kumar K.V

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