Re: [PATCH -v2] EFI: Runtime services virtual mapping

2013-10-08 Thread Dave Young 
Sorry for reply late because I was in a long holiday...

On 09/30/13 at 10:17pm, Borislav Petkov wrote:
 On Thu, Sep 26, 2013 at 11:12:42AM +0800, Dave Young wrote:
  If we choose this approach, can we save not only the efi_mapping, but
  also the fields which will be converted to virt addr, like fw_vendor,
  runtime, tables? During my test on a HP workstation, the config table
  item (SMBIOS) also is converted to virt addr though spec only mention
  fw_vendor/runtime/tables.
 
 Btw, I was about to ask: how do you pass boot_params to the kexec
 kernel?

As Vivek mentioned, just kexec-tools will get the saved info from sysfs
or procfs, then it as a boot loader will prepare the linux boot setup
struct with these 1st efi values.

 
 Because I'm looking into hpa's idea to pass an efi_mapping array of
 regions with setup_data but how does this get passed to the kexec'ed
 kernel? I see in your patches you have boot_params.saved_*** for the
 needed info but you're not writing to them anywhere. Is that why you've
 added them to the systab_show function so that userspace can parse it
 and build the boot_params thing?

Yes, I just printed them in systab_show, kexec-tools will parse it.

 
 Thanks.
 
 -- 
 Regards/Gruss,
 Boris.
 
 Sent from a fat crate under my desk. Formatting is fine.
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[PATCH 11/12] efi: Add an efi= kernel command line parameter

2013-10-08 Thread Borislav Petkov 
From: Borislav Petkov b...@suse.de

... for passing miscellaneous options and chicken bits from the command
line.

Signed-off-by: Borislav Petkov b...@suse.de
---
 arch/x86/platform/efi/efi.c | 9 +
 1 file changed, 9 insertions(+)

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 538c1e6b7b2c..16996aba5012 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -1113,3 +1113,12 @@ efi_status_t efi_query_variable_store(u32 attributes, 
unsigned long size)
return EFI_SUCCESS;
 }
 EXPORT_SYMBOL_GPL(efi_query_variable_store);
+
+static int __init parse_efi_cmdline(char *str)
+{
+   if (*str == '=')
+   str++;
+
+   return 0;
+}
+early_param(efi, parse_efi_cmdline);
-- 
1.8.4

-- 
Regards/Gruss,
Boris.

Sent from a fat crate under my desk. Formatting is fine.
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