With all MPIPL support in place, export a "dump" node in device tree, signifying that PowerNV QEMU platform supports MPIPL
Also, export fw-load-area dt node, which has details about where the kernel & initrd were loaded, so that kernel can verify whether the kernel/initrd images were loaded within the boot memory region. QEMU just exports these details in fw-load-area, the check for boot memory region is done in kernel. Signed-off-by: Aditya Gupta <[email protected]> --- hw/ppc/pnv.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c index 0b94e0c7a19b..139a2037e5d6 100644 --- a/hw/ppc/pnv.c +++ b/hw/ppc/pnv.c @@ -54,6 +54,7 @@ #include "hw/ppc/pnv_chip.h" #include "hw/ppc/pnv_xscom.h" #include "hw/ppc/pnv_pnor.h" +#include "hw/ppc/pnv_mpipl.h" #include "hw/isa/isa.h" #include "hw/char/serial-isa.h" @@ -672,6 +673,39 @@ static void pnv_dt_power_mgt(PnvMachineState *pnv, void *fdt) _FDT(fdt_setprop_cell(fdt, off, "ibm,enabled-stop-levels", 0xc0000000)); } +static void pnv_dt_mpipl_dump(PnvMachineState *pnv, void *fdt) +{ + int off; + + /* + * Add "dump" node so kernel knows MPIPL (aka fadump) is supported + * + * Note: This is only needed to be done since we are passing device tree to + * opal + * + * In case HDAT is supported in future, then opal can add these nodes by + * itself based on system attribute having MPIPL_SUPPORTED bit set + */ + off = fdt_add_subnode(fdt, 0, "ibm,opal"); + if (off == -FDT_ERR_EXISTS) { + off = fdt_path_offset(fdt, "/ibm,opal"); + } + + _FDT(off); + off = fdt_add_subnode(fdt, off, "dump"); + _FDT(off); + _FDT((fdt_setprop_string(fdt, off, "compatible", "ibm,opal-dump"))); + + /* Add kernel and initrd as fw-load-area */ + uint64_t fw_load_area[4] = { + cpu_to_be64(KERNEL_LOAD_ADDR), cpu_to_be64(KERNEL_MAX_SIZE), + cpu_to_be64(INITRD_LOAD_ADDR), cpu_to_be64(INITRD_MAX_SIZE) + }; + + _FDT((fdt_setprop(fdt, off, "fw-load-area", + fw_load_area, sizeof(fw_load_area)))); +} + static void *pnv_dt_create(MachineState *machine) { PnvMachineClass *pmc = PNV_MACHINE_GET_CLASS(machine); @@ -734,6 +768,9 @@ static void *pnv_dt_create(MachineState *machine) pmc->dt_power_mgt(pnv, fdt); } + /* Advertise support for MPIPL */ + pnv_dt_mpipl_dump(pnv, fdt); + return fdt; } -- 2.53.0
