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ARM: kvm: round HYP section to page size instead of log2 upper bound

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Older binutils do not support expressions involving the values of
external symbols so just round up the HYP region to the page size.

Tested-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
[will: when will this ever end?!]
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Ard Biesheuvel 2015-03-27 10:18:01 +00:00 committed by Will Deacon
parent 12eb3e8339
commit a9fea8b388
2 changed files with 1 additions and 33 deletions
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31
arch/arm/kernel/vmlinux.lds.S
View File

@ -12,26 +12,6 @@
#include <asm/pgtable.h>
#endif
/*
* Poor man's version of LOG2CEIL(), which is
* not available in binutils before v2.24.
*/
#define LOG2_ROUNDUP(size) ( \
__LOG2_ROUNDUP(size, 2) \
__LOG2_ROUNDUP(size, 3) \
__LOG2_ROUNDUP(size, 4) \
__LOG2_ROUNDUP(size, 5) \
__LOG2_ROUNDUP(size, 6) \
__LOG2_ROUNDUP(size, 7) \
__LOG2_ROUNDUP(size, 8) \
__LOG2_ROUNDUP(size, 9) \
__LOG2_ROUNDUP(size, 10) \
__LOG2_ROUNDUP(size, 11) \
12)
#define __LOG2_ROUNDUP(size, order) \
(size) <= (1 << order) ? order :
#define PROC_INFO \
. = ALIGN(4); \
VMLINUX_SYMBOL(__proc_info_begin) = .; \
@ -43,20 +23,11 @@
VMLINUX_SYMBOL(__idmap_text_start) = .; \
*(.idmap.text) \
VMLINUX_SYMBOL(__idmap_text_end) = .; \
. = ALIGN(1 << LOG2_ROUNDUP(__hyp_idmap_size)); \
. = ALIGN(PAGE_SIZE); \
VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \
*(.hyp.idmap.text) \
VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;
/*
* If the HYP idmap .text section is populated, it needs to be positioned
* such that it will not cross a page boundary in the final output image.
* So align it to the section size rounded up to the next power of 2.
* If __hyp_idmap_size is undefined, the section will be empty so define
* it as 0 in that case.
*/
PROVIDE(__hyp_idmap_size = 0);
#ifdef CONFIG_HOTPLUG_CPU
#define ARM_CPU_DISCARD(x)
#define ARM_CPU_KEEP(x) x

3
arch/arm/kvm/init.S
View File

@ -157,6 +157,3 @@ target: @ We're now in the trampoline code, switch page tables
__kvm_hyp_init_end:
.popsection
.global __hyp_idmap_size
.set __hyp_idmap_size, __kvm_hyp_init_end - __kvm_hyp_init