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| author | Marc Zyngier <marc.zyngier@arm.com> | 2013-04-12 19:12:04 +0100 |
|---|---|---|
| committer | Christoffer Dall <cdall@cs.columbia.edu> | 2013-04-28 22:23:09 -0700 |
| commit | 0394e1f605208706e4e1999d06a4570b9f583b7f (patch) | |
| tree | 89dc7d8e9b2f0f7f2f4bf83c29ea71ab0ce5147a | |
| parent | 2fb410596ca917fe6419be61ee5bc1782b17d947 (diff) | |
| download | linux-0394e1f605208706e4e1999d06a4570b9f583b7f.tar.bz2 | |
ARM: KVM: enforce maximum size for identity mapped code
We're about to move to an init procedure where we rely on the
fact that the init code fits in a single page. Make sure we
align the idmap text on a vector alignment, and that the code is
not bigger than a single page.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
| -rw-r--r-- | arch/arm/kernel/vmlinux.lds.S | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S index b571484e9f03..a871b8e00fca 100644 --- a/arch/arm/kernel/vmlinux.lds.S +++ b/arch/arm/kernel/vmlinux.lds.S @@ -20,7 +20,7 @@ VMLINUX_SYMBOL(__idmap_text_start) = .; \ *(.idmap.text) \ VMLINUX_SYMBOL(__idmap_text_end) = .; \ - ALIGN_FUNCTION(); \ + . = ALIGN(32); \ VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \ *(.hyp.idmap.text) \ VMLINUX_SYMBOL(__hyp_idmap_text_end) = .; @@ -315,3 +315,8 @@ SECTIONS */ ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support") ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined") +/* + * The HYP init code can't be more than a page long. + * The above comment applies as well. + */ +ASSERT(((__hyp_idmap_text_end - __hyp_idmap_text_start) <= PAGE_SIZE), "HYP init code too big") |