Date: Thu, 30 Nov 2023 11:24:32 GMT From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 839999e7efdc - main - vm: Add kva_alloc_aligned Message-ID: <202311301124.3AUBOWLi037321@gitrepo.freebsd.org>
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The branch main has been updated by andrew: URL: https://cgit.FreeBSD.org/src/commit/?id=839999e7efdc980d5ada92ea93719c7e29765809 commit 839999e7efdc980d5ada92ea93719c7e29765809 Author: Andrew Turner <andrew@FreeBSD.org> AuthorDate: 2023-11-29 12:54:49 +0000 Commit: Andrew Turner <andrew@FreeBSD.org> CommitDate: 2023-11-30 10:50:03 +0000 vm: Add kva_alloc_aligned Add a function like kva_alloc that allows us to specify the alignment of the virtual address space returned. Reviewed by: alc, kib, markj Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D42788 --- sys/vm/vm_extern.h | 1 + sys/vm/vm_kern.c | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/sys/vm/vm_extern.h b/sys/vm/vm_extern.h index bcef44012472..2e2bc18a0233 100644 --- a/sys/vm/vm_extern.h +++ b/sys/vm/vm_extern.h @@ -47,6 +47,7 @@ struct domainset; /* These operate on kernel virtual addresses only. */ vm_offset_t kva_alloc(vm_size_t); +vm_offset_t kva_alloc_aligned(vm_size_t, vm_size_t); void kva_free(vm_offset_t, vm_size_t); /* These operate on pageable virtual addresses. */ diff --git a/sys/vm/vm_kern.c b/sys/vm/vm_kern.c index 6b22a96bf597..b17b857bd902 100644 --- a/sys/vm/vm_kern.c +++ b/sys/vm/vm_kern.c @@ -155,6 +155,27 @@ kva_alloc(vm_size_t size) return (addr); } +/* + * kva_alloc_aligned: + * + * Allocate a virtual address range as in kva_alloc where the base + * address is aligned to align. + */ +vm_offset_t +kva_alloc_aligned(vm_size_t size, vm_size_t align) +{ + vm_offset_t addr; + + TSENTER(); + size = round_page(size); + if (vmem_xalloc(kernel_arena, size, align, 0, 0, VMEM_ADDR_MIN, + VMEM_ADDR_MAX, M_BESTFIT | M_NOWAIT, &addr)) + return (0); + TSEXIT(); + + return (addr); +} + /* * kva_free: *
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