From: Logan Gunthorpe <logang@deltatee•com>
To: linux-kernel@vger•kernel.org,
linux-arm-kernel@lists•infradead.org, linux-ia64@vger•kernel.org,
linuxppc-dev@lists•ozlabs.org, linux-s390@vger•kernel.org,
linux-sh@vger•kernel.org, platform-driver-x86@vger•kernel.org,
linux-mm@kvack•org, Dan Williams <dan.j.williams@intel•com>,
Michal Hocko <mhocko@kernel•org>,
David Hildenbrand <david@redhat•com>,
Andrew Morton <akpm@linux-foundation•org>
Cc: Eric Badger <ebadger@gigaio•com>,
"H. Peter Anvin" <hpa@zytor•com>,
Peter Zijlstra <peterz@infradead•org>,
Catalin Marinas <catalin.marinas@arm•com>,
Dave Hansen <dave.hansen@linux•intel.com>,
x86@kernel•org, Logan Gunthorpe <logang@deltatee•com>,
Ingo Molnar <mingo@redhat•com>, Borislav Petkov <bp@alien8•de>,
Andy Lutomirski <luto@kernel•org>,
Benjamin Herrenschmidt <benh@kernel•crashing.org>,
Thomas Gleixner <tglx@linutronix•de>,
Will Deacon <will@kernel•org>, Christoph Hellwig <hch@lst•de>
Subject: [PATCH v2 4/8] x86/mm: Introduce _set_memory_prot()
Date: Tue, 7 Jan 2020 13:59:55 -0700 [thread overview]
Message-ID: <20200107205959.7575-5-logang@deltatee.com> (raw)
In-Reply-To: <20200107205959.7575-1-logang@deltatee.com>
For use in the 32bit arch_add_memory() to set the pgprot type of the
memory to add.
Cc: Thomas Gleixner <tglx@linutronix•de>
Cc: Ingo Molnar <mingo@redhat•com>
Cc: Borislav Petkov <bp@alien8•de>
Cc: "H. Peter Anvin" <hpa@zytor•com>
Cc: x86@kernel•org
Cc: Dave Hansen <dave.hansen@linux•intel.com>
Cc: Andy Lutomirski <luto@kernel•org>
Cc: Peter Zijlstra <peterz@infradead•org>
Signed-off-by: Logan Gunthorpe <logang@deltatee•com>
---
arch/x86/include/asm/set_memory.h | 1 +
arch/x86/mm/pageattr.c | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h
index 2ee8e469dcf5..d728c2f3ad96 100644
--- a/arch/x86/include/asm/set_memory.h
+++ b/arch/x86/include/asm/set_memory.h
@@ -34,6 +34,7 @@
* The caller is required to take care of these.
*/
+int _set_memory_prot(unsigned long addr, int numpages, pgprot_t prot);
int _set_memory_uc(unsigned long addr, int numpages);
int _set_memory_wc(unsigned long addr, int numpages);
int _set_memory_wt(unsigned long addr, int numpages);
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 1b99ad05b117..2f1934d7b8d9 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -1781,6 +1781,13 @@ static inline int cpa_clear_pages_array(struct page **pages, int numpages,
CPA_PAGES_ARRAY, pages);
}
+int _set_memory_prot(unsigned long addr, int numpages, pgprot_t prot)
+{
+ return change_page_attr_set_clr(&addr, numpages, prot,
+ __pgprot(~pgprot_val(prot)), 0, 0,
+ NULL);
+}
+
int _set_memory_uc(unsigned long addr, int numpages)
{
/*
--
2.20.1
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next prev parent reply other threads:[~2020-01-07 21:02 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-07 20:59 [PATCH v2 0/8] Allow setting caching mode in arch_add_memory() for P2PDMA Logan Gunthorpe
2020-01-07 20:59 ` [PATCH v2 1/8] mm/memory_hotplug: Drop the flags field from struct mhp_restrictions Logan Gunthorpe
2020-01-08 12:27 ` David Hildenbrand
2020-01-07 20:59 ` [PATCH v2 2/8] mm/memory_hotplug: Rename mhp_restrictions to mhp_modifiers Logan Gunthorpe
2020-01-08 12:28 ` David Hildenbrand
2020-01-08 17:16 ` Logan Gunthorpe
2020-01-08 18:59 ` Dan Williams
2020-01-08 19:08 ` David Hildenbrand
2020-01-08 19:13 ` Dan Williams
2020-01-08 19:29 ` Logan Gunthorpe
2020-01-07 20:59 ` [PATCH v2 3/8] x86/mm: Thread pgprot_t through init_memory_mapping() Logan Gunthorpe
2020-01-07 20:59 ` Logan Gunthorpe [this message]
2020-01-07 20:59 ` [PATCH v2 5/8] powerpc/mm: Thread pgprot_t through create_section_mapping() Logan Gunthorpe
2020-01-07 20:59 ` [PATCH v2 6/8] s390/mm: Thread pgprot_t through vmem_add_mapping() Logan Gunthorpe
2020-01-08 12:43 ` David Hildenbrand
2020-01-08 17:20 ` Logan Gunthorpe
2020-01-07 20:59 ` [PATCH v2 7/8] mm/memory_hotplug: Add pgprot_t to mhp_modifiers Logan Gunthorpe
2020-01-08 12:39 ` David Hildenbrand
2020-01-08 17:17 ` Logan Gunthorpe
2020-01-08 12:42 ` Michal Hocko
2020-01-08 17:18 ` Logan Gunthorpe
2020-01-07 20:59 ` [PATCH v2 8/8] mm/memremap: Set caching mode for PCI P2PDMA memory to WC Logan Gunthorpe
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