From: mhkelley58@gmail.com
To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
kirill.shutemov@linux.intel.com, kys@microsoft.com,
haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com,
luto@kernel.org, peterz@infradead.org, akpm@linux-foundation.org,
urezki@gmail.com, hch@infradead.org, lstoakes@gmail.com,
thomas.lendacky@amd.com, ardb@kernel.org, jroedel@suse.de,
seanjc@google.com, rick.p.edgecombe@intel.com,
sathyanarayanan.kuppuswamy@linux.intel.com,
linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev,
linux-hyperv@vger.kernel.org, linux-mm@kvack.org
Subject: [PATCH v2 3/8] x86/mm: Remove "static" from vmap_pages_range()
Date: Tue, 21 Nov 2023 13:20:11 -0800 [thread overview]
Message-ID: <20231121212016.1154303-4-mhklinux@outlook.com> (raw)
In-Reply-To: <20231121212016.1154303-1-mhklinux@outlook.com>
From: Michael Kelley <mhklinux@outlook.com>
The mm subsystem currently provides no mechanism to map memory pages
to a specified virtual address range. A virtual address range can be
allocated using get_vm_area(), but the only function available for
mapping memory pages to a caller-specified address in that range is
ioremap_page_range(), which is inappropriate for system memory.
Fix this by allowing vmap_pages_range() to be used by callers outside
of vmalloc.c.
Signed-off-by: Michael Kelley <mhklinux@outlook.com>
---
include/linux/vmalloc.h | 2 ++
mm/vmalloc.c | 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index c720be70c8dd..ee12f5226a45 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -233,6 +233,8 @@ static inline bool is_vm_area_hugepages(const void *addr)
#ifdef CONFIG_MMU
void vunmap_range(unsigned long addr, unsigned long end);
+int vmap_pages_range(unsigned long addr, unsigned long end, pgprot_t prot,
+ struct page **pages, unsigned int page_shift);
static inline void set_vm_flush_reset_perms(void *addr)
{
struct vm_struct *vm = find_vm_area(addr);
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index d12a17fc0c17..b2a72bd317c6 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -625,7 +625,7 @@ int vmap_pages_range_noflush(unsigned long addr, unsigned long end,
* RETURNS:
* 0 on success, -errno on failure.
*/
-static int vmap_pages_range(unsigned long addr, unsigned long end,
+int vmap_pages_range(unsigned long addr, unsigned long end,
pgprot_t prot, struct page **pages, unsigned int page_shift)
{
int err;
--
2.25.1
next prev parent reply other threads:[~2023-11-21 21:20 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-21 21:20 [PATCH v2 0/8] x86/coco: Mark CoCo VM pages not present when changing encrypted state mhkelley58
2023-11-21 21:20 ` [PATCH v2 1/8] x86/coco: Use slow_virt_to_phys() in page transition hypervisor callbacks mhkelley58
2023-11-21 21:20 ` [PATCH v2 2/8] x86/mm: Don't do a TLB flush if changing a PTE that isn't marked present mhkelley58
2023-11-27 22:21 ` Edgecombe, Rick P
2023-11-28 17:34 ` Michael Kelley
2023-11-21 21:20 ` mhkelley58 [this message]
2023-11-22 6:26 ` [PATCH v2 3/8] x86/mm: Remove "static" from vmap_pages_range() Christoph Hellwig
2023-11-23 0:24 ` Michael Kelley
2023-11-23 7:32 ` Christoph Hellwig
2023-11-27 1:06 ` Michael Kelley
2023-11-21 21:20 ` [PATCH v2 4/8] x86/sev: Enable PVALIDATE for PFNs without a valid virtual address mhkelley58
2023-11-27 21:38 ` Edgecombe, Rick P
2023-11-28 18:08 ` Michael Kelley
2023-11-28 18:59 ` Edgecombe, Rick P
2023-12-12 18:35 ` Michael Kelley
2023-11-21 21:20 ` [PATCH v2 5/8] x86/mm: Mark CoCo VM pages not present while changing encrypted state mhkelley58
2023-11-21 21:20 ` [PATCH v2 6/8] x86/mm: Merge CoCo prepare and finish hypervisor callbacks mhkelley58
2023-11-21 21:20 ` [PATCH v2 7/8] x86/mm: Remove unnecessary call layer for __set_memory_enc_pgtable() mhkelley58
2023-11-21 21:20 ` [PATCH v2 8/8] x86/mm: Add comments about errors in set_memory_decrypted()/encrypted() mhkelley58
2023-11-24 10:06 ` [PATCH v2 0/8] x86/coco: Mark CoCo VM pages not present when changing encrypted state kirill.shutemov
2023-11-28 19:12 ` Michael Kelley
2023-11-29 15:10 ` kirill.shutemov
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