Re: [PATCH v2] kdump: pass acpi_rsdp= to 2nd kernel for efi booting

Khalid Aziz
2012-10-19T20:09:46Z

On Fri, 2012-10-19 at 10:53 -0400, Vivek Goyal wrote:
> On Thu, Oct 18, 2012 at 02:20:46PM -0700, Eric W. Biederman wrote:
> >
> > If we are passing the acpi sections is that not enough for the kernel
> > to find the rdsp area? I'm just a bit surprised we need this patch
> > is all.
> >
> > Somehow it seems a bit ugly to pass information that could be conveyed
> > in the memory map on the command line.
>
> I have no idea how UEFI case is working. Dave/Khalid might have more
> details on this.

On a UEFI machine with CSM, kernel finds RSDP in EBDA. On a UEFI machine
with no CSM, kernel fails to find RSDP and here is the message I see:

ACPI BIOS Bug: Error: A valid RSDP was not found (20120913/tbxfroot-219)

--
Khalid