On Mon, Apr 8, 2013 at 9:17 AM, Marc Zyngier <marc.zyngier@xxxxxxx> wrote:
> Add the necessary infrastructure for identity-mapped HYP page
> tables. Idmap-ed code must be in the ".hyp.idmap.text" linker
> section.
>
> The rest of the HYP ends up in ".hyp.text".
>
> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
> ---
> arch/arm64/kernel/vmlinux.lds.S | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
> index 3fae2be..855d43d 100644
> --- a/arch/arm64/kernel/vmlinux.lds.S
> +++ b/arch/arm64/kernel/vmlinux.lds.S
> @@ -17,6 +17,15 @@ ENTRY(stext)
>
> jiffies = jiffies_64;
>
> +#define HYPERVISOR_TEXT \
> + . = ALIGN(2048); \
why align to 2048? Comment?
are you changing this to the same idea as for the 32-bit code to reduce the kernel size?
> + VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \
> + *(.hyp.idmap.text) \
> + VMLINUX_SYMBOL(__hyp_idmap_text_end) = .; \
> + VMLINUX_SYMBOL(__hyp_text_start) = .; \
> + *(.hyp.text) \
> + VMLINUX_SYMBOL(__hyp_text_end) = .;
> +
> SECTIONS
> {
> /*
> @@ -49,6 +58,7 @@ SECTIONS
> TEXT_TEXT
> SCHED_TEXT
> LOCK_TEXT
> + HYPERVISOR_TEXT
> *(.fixup)
> *(.gnu.warning)
> . = ALIGN(16);
> @@ -124,3 +134,9 @@ SECTIONS
> STABS_DEBUG
> .comment 0 : { *(.comment) }
> }
> +
> +/*
> + * The HYP init code can't be more than a page long.
> + */
> +ASSERT(((__hyp_idmap_text_start + PAGE_SIZE) >= __hyp_idmap_text_end),
> + "HYP init code too big")
> --
> 1.8.1.4
>
>
>
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