ARM: kvm: implement replacement for ld's LOG2CEIL()
Commit 06f75a1f62
("ARM, arm64: kvm: get rid of the bounce
page") uses ld's builtin function LOG2CEIL() to align the
KVM init code to a log2 upper bound of its size. However,
this function turns out to be a fairly recent addition to
binutils, which breaks the build for older toolchains.
So instead, implement a replacement LOG2_ROUNDUP() using
the C preprocessor.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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06f75a1f62
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@ -11,7 +11,27 @@
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#ifdef CONFIG_ARM_KERNMEM_PERMS
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#include <asm/pgtable.h>
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#endif
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/*
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* Poor man's version of LOG2CEIL(), which is
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* not available in binutils before v2.24.
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*/
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#define LOG2_ROUNDUP(size) ( \
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__LOG2_ROUNDUP(size, 2) \
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__LOG2_ROUNDUP(size, 3) \
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__LOG2_ROUNDUP(size, 4) \
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__LOG2_ROUNDUP(size, 5) \
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__LOG2_ROUNDUP(size, 6) \
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__LOG2_ROUNDUP(size, 7) \
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__LOG2_ROUNDUP(size, 8) \
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__LOG2_ROUNDUP(size, 9) \
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__LOG2_ROUNDUP(size, 10) \
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__LOG2_ROUNDUP(size, 11) \
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12)
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#define __LOG2_ROUNDUP(size, order) \
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(size) <= (1 << order) ? order :
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#define PROC_INFO \
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. = ALIGN(4); \
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VMLINUX_SYMBOL(__proc_info_begin) = .; \
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@ -23,7 +43,7 @@
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VMLINUX_SYMBOL(__idmap_text_start) = .; \
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*(.idmap.text) \
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VMLINUX_SYMBOL(__idmap_text_end) = .; \
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. = ALIGN(1 << LOG2CEIL(__hyp_idmap_size)); \
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. = ALIGN(1 << LOG2_ROUNDUP(__hyp_idmap_size)); \
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VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \
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*(.hyp.idmap.text) \
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VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;
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