Introduce early_init_dt_add_memory_hyp() to allow KVM to conserve a copy
of the memory regions parsed from DT. This will be needed in the context
of the protected nVHE feature of KVM/arm64 where the code running at EL2
will be cleanly separated from the host kernel during boot, and will
need its own representation of memory.
Signed-off-by: Quentin Perret <qper...@google.com>
---
drivers/of/fdt.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 4602e467ca8b..af2b5a09c5b4 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -1099,6 +1099,10 @@ int __init early_init_dt_scan_chosen(unsigned long node,
const char *uname,
#define MAX_MEMBLOCK_ADDR ((phys_addr_t)~0)
#endif
+void __init __weak early_init_dt_add_memory_hyp(u64 base, u64 size)
+{
+}
+
void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
{
const u64 phys_offset = MIN_MEMBLOCK_ADDR;
@@ -1139,6 +1143,7 @@ void __init __weak early_init_dt_add_memory_arch(u64
base, u64 size)
base = phys_offset;
}
memblock_add(base, size);
+ early_init_dt_add_memory_hyp(base, size);
}
int __init __weak early_init_dt_mark_hotplug_memory_arch(u64 base, u64 size)
--
2.29.2.299.gdc1121823c-goog
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