* [PATCH] x86/efi: Only map kernel text for EFI mixed mode
@ 2016-01-30 1:10 Sai Praneeth Prakhya
[not found] ` <1454116233-7074-1-git-send-email-sai.praneeth.prakhya-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: Sai Praneeth Prakhya @ 2016-01-30 1:10 UTC (permalink / raw)
To: linux-efi-u79uwXL29TY76Z2rM5mHXA
Cc: Sai Praneeth, Borislav Petkov, Ricardo Neri, Ravi Shankar,
Matt Fleming
From: Sai Praneeth <sai.praneeth.prakhya-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
The correct symbol to use when figuring out the size of the kernel
text is '_etext', not '_end' which is the symbol for the entire kernel
image includes data and debug sections.
Cc: Borislav Petkov <bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>
Cc: Ricardo Neri <ricardo.neri-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: Ravi Shankar <ravi.v.shankar-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
arch/x86/platform/efi/efi_64.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
index b492521503fe..040fff163d96 100644
--- a/arch/x86/platform/efi/efi_64.c
+++ b/arch/x86/platform/efi/efi_64.c
@@ -275,7 +275,7 @@ int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
efi_scratch.phys_stack = virt_to_phys(page_address(page));
efi_scratch.phys_stack += PAGE_SIZE; /* stack grows down */
- npages = (_end - _text) >> PAGE_SHIFT;
+ npages = (_etext - _text) >> PAGE_SHIFT;
text = __pa(_text);
pfn = text >> PAGE_SHIFT;
--
2.1.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] x86/efi: Only map kernel text for EFI mixed mode
[not found] ` <1454116233-7074-1-git-send-email-sai.praneeth.prakhya-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
@ 2016-02-11 15:15 ` Matt Fleming
0 siblings, 0 replies; 2+ messages in thread
From: Matt Fleming @ 2016-02-11 15:15 UTC (permalink / raw)
To: Sai Praneeth Prakhya
Cc: linux-efi-u79uwXL29TY76Z2rM5mHXA, Borislav Petkov, Ricardo Neri,
Ravi Shankar
On Fri, 29 Jan, at 05:10:33PM, Sai Praneeth Prakhya wrote:
> From: Sai Praneeth <sai.praneeth.prakhya-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>
> The correct symbol to use when figuring out the size of the kernel
> text is '_etext', not '_end' which is the symbol for the entire kernel
> image includes data and debug sections.
>
> Cc: Borislav Petkov <bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>
> Cc: Ricardo Neri <ricardo.neri-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Cc: Ravi Shankar <ravi.v.shankar-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
> Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> ---
> arch/x86/platform/efi/efi_64.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
> index b492521503fe..040fff163d96 100644
> --- a/arch/x86/platform/efi/efi_64.c
> +++ b/arch/x86/platform/efi/efi_64.c
> @@ -275,7 +275,7 @@ int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
> efi_scratch.phys_stack = virt_to_phys(page_address(page));
> efi_scratch.phys_stack += PAGE_SIZE; /* stack grows down */
>
> - npages = (_end - _text) >> PAGE_SHIFT;
> + npages = (_etext - _text) >> PAGE_SHIFT;
> text = __pa(_text);
> pfn = text >> PAGE_SHIFT;
>
Thanks, applied.
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2016-01-30 1:10 [PATCH] x86/efi: Only map kernel text for EFI mixed mode Sai Praneeth Prakhya
[not found] ` <1454116233-7074-1-git-send-email-sai.praneeth.prakhya-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-02-11 15:15 ` Matt Fleming
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