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    Subject[RFC PATCH 15/27] of/fdt: Introduce early_init_dt_add_memory_hyp()
    From
    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 <qperret@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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