The following patch is going to use the symbol from the fw_cfg module,
to call the function and write the note location details in the
vmcoreinfo entry, so qemu can produce dumps with the vmcoreinfo note.

CC: Andrew Morton <akpm@linux-foundation.org>
CC: Baoquan He <bhe@redhat.com>
CC: Dave Young <dyoung@redhat.com>
CC: Dave Young <dyoung@redhat.com>
CC: Hari Bathini <hbathini@linux.vnet.ibm.com>
CC: Tony Luck <tony.luck@intel.com>
CC: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Gabriel Somlo <somlo@cmu.edu>
---
 kernel/crash_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index 6db80fc0810b..47541c891810 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_core.c
@@ -375,6 +375,7 @@ phys_addr_t __weak paddr_vmcoreinfo_note(void)
 {
 	return __pa(vmcoreinfo_note);
 }
+EXPORT_SYMBOL(paddr_vmcoreinfo_note);
 
 static int __init crash_save_vmcoreinfo_init(void)
 {
-- 
2.15.0.125.g8f49766d64

On 11/13/17 at 08:29pm, Marc-André Lureau wrote:
> The following patch is going to use the symbol from the fw_cfg module,
> to call the function and write the note location details in the
> vmcoreinfo entry, so qemu can produce dumps with the vmcoreinfo note.
> 
> CC: Andrew Morton <akpm@linux-foundation.org>
> CC: Baoquan He <bhe@redhat.com>
> CC: Dave Young <dyoung@redhat.com>
> CC: Dave Young <dyoung@redhat.com>
> CC: Hari Bathini <hbathini@linux.vnet.ibm.com>
> CC: Tony Luck <tony.luck@intel.com>
> CC: Vivek Goyal <vgoyal@redhat.com>
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> Acked-by: Gabriel Somlo <somlo@cmu.edu>
> ---
>  kernel/crash_core.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/kernel/crash_core.c b/kernel/crash_core.c
> index 6db80fc0810b..47541c891810 100644
> --- a/kernel/crash_core.c
> +++ b/kernel/crash_core.c
> @@ -375,6 +375,7 @@ phys_addr_t __weak paddr_vmcoreinfo_note(void)
>  {
>  	return __pa(vmcoreinfo_note);
>  }
> +EXPORT_SYMBOL(paddr_vmcoreinfo_note);
>  
>  static int __init crash_save_vmcoreinfo_init(void)
>  {
> -- 
> 2.15.0.125.g8f49766d64
> 

Acked-by: Dave Young <dyoung@redhat.com>

Thanks
Dave

On 11/13/17 at 08:29pm, Marc-André Lureau wrote:
> The following patch is going to use the symbol from the fw_cfg module,
> to call the function and write the note location details in the
> vmcoreinfo entry, so qemu can produce dumps with the vmcoreinfo note.
> 
> CC: Andrew Morton <akpm@linux-foundation.org>
> CC: Baoquan He <bhe@redhat.com>
> CC: Dave Young <dyoung@redhat.com>
> CC: Dave Young <dyoung@redhat.com>
> CC: Hari Bathini <hbathini@linux.vnet.ibm.com>
> CC: Tony Luck <tony.luck@intel.com>
> CC: Vivek Goyal <vgoyal@redhat.com>
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> Acked-by: Gabriel Somlo <somlo@cmu.edu>

ACK

Acked-by: Baoquan He <bhe@redhat.com>

Thanks
Baoquan

> ---
>  kernel/crash_core.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/kernel/crash_core.c b/kernel/crash_core.c
> index 6db80fc0810b..47541c891810 100644
> --- a/kernel/crash_core.c
> +++ b/kernel/crash_core.c
> @@ -375,6 +375,7 @@ phys_addr_t __weak paddr_vmcoreinfo_note(void)
>  {
>  	return __pa(vmcoreinfo_note);
>  }
> +EXPORT_SYMBOL(paddr_vmcoreinfo_note);
>  
>  static int __init crash_save_vmcoreinfo_init(void)
>  {
> -- 
> 2.15.0.125.g8f49766d64
>