Messages in this thread | | | Date | Wed, 5 Dec 2018 15:58:14 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH v12 1/5] x86/boot: Add get_acpi_rsdp() to parse RSDP in cmdline from KEXEC |
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On Thu, Nov 29, 2018 at 04:16:27PM +0800, Chao Fan wrote: > To fix the conflict between KASLR and memory-hotremove, memory > information in SRAT table is necessary. > > ACPI SRAT (System/Static Resource Affinity Table) can show the details > about memory ranges, including ranges of memory provided by hot-added > memory devices. SRAT table must be introduced by RSDP pointer (Root > System Description Pointer). So RSDP should be found firstly. > > When booting form KEXEC/EFI/BIOS, the methods to find RSDP pointer > are different. When booting from KEXEC, 'acpi_rsdp' may have been > added to cmdline, so parse the cmdline and find the RSDP pointer. > > Signed-off-by: Chao Fan <fanc.fnst@cn.fujitsu.com> > --- > arch/x86/boot/compressed/acpitb.c | 33 +++++++++++++++++++++++++++++++ > arch/x86/boot/compressed/misc.c | 5 +++++ > arch/x86/boot/compressed/misc.h | 4 ++++ > lib/kstrtox.c | 5 +++++ > 4 files changed, 47 insertions(+) > create mode 100644 arch/x86/boot/compressed/acpitb.c > > diff --git a/arch/x86/boot/compressed/acpitb.c b/arch/x86/boot/compressed/acpitb.c > new file mode 100644 > index 000000000000..614c45655cff > --- /dev/null > +++ b/arch/x86/boot/compressed/acpitb.c
Also, I guess calling that file simply "acpi.c" is good enough.
> @@ -0,0 +1,33 @@ > +// SPDX-License-Identifier: GPL-2.0 > +#define BOOT_CTYPE_H > +#include "misc.h" > +#include "error.h" > + > +#include <linux/efi.h> > +#include <asm/efi.h>
asm/ headers come after linux/ header.
...
Thx.
-- Regards/Gruss, Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
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