On Thu, Feb 06, 2025 at 03:27:53PM +0200, Mike Rapoport wrote:
>From: Alexander Graf <graf@xxxxxxxxxx>
>
>Linux has recently gained support for "reserve_mem": A mechanism to
>allocate a region of memory early enough in boot that we can cross our
>fingers and hope it stays at the same location during most boots, so we
>can store for example ftrace buffers into it.
>
>Thanks to KASLR, we can never be really sure that "reserve_mem"
>allocations are static across kexec. Let's teach it KHO awareness so
>that it serializes its reservations on kexec exit and deserializes them
>again on boot, preserving the exact same mapping across kexec.
>
>This is an example user for KHO in the KHO patch set to ensure we have
>at least one (not very controversial) user in the tree before extending
>KHO's use to more subsystems.
>
>Signed-off-by: Alexander Graf <graf@xxxxxxxxxx>
>Co-developed-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
>Signed-off-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
>---
> mm/memblock.c | 131 ++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 131 insertions(+)
>
>diff --git a/mm/memblock.c b/mm/memblock.c
>index 84df96efca62..fdb08b60efc1 100644
>--- a/mm/memblock.c
>+++ b/mm/memblock.c
>@@ -16,6 +16,9 @@
> #include <linux/kmemleak.h>
> #include <linux/seq_file.h>
> #include <linux/memblock.h>
>+#include <linux/kexec_handover.h>
Looks this one breaks the memblock test in tools/testing/memblock.
memblock.c:19:10: fatal error: linux/kexec_handover.h: No such file or directory
19 | #include <linux/kexec_handover.h>
| ^~~~~~~~~~~~~~~~~~~~~~~~
>+#include <linux/kexec.h>
>+#include <linux/libfdt.h>
>
--
Wei Yang
Help you, Help me
