powerpc/prom_init: Add the ESM call to prom_init
Make the Enter-Secure-Mode (ESM) ultravisor call to switch the VM to secure mode. Pass kernel base address and FDT address so that the Ultravisor is able to verify the integrity of the VM using information from the ESM blob. Add "svm=" command line option to turn on switching to secure mode. Signed-off-by: NRam Pai <linuxram@us.ibm.com> [ andmike: Generate an RTAS os-term hcall when the ESM ucall fails. ] Signed-off-by: NMichael Anderson <andmike@linux.ibm.com> [ bauerman: Cleaned up the code a bit. ] Signed-off-by: NThiago Jung Bauermann <bauerman@linux.ibm.com> Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190820021326.6884-5-bauerman@linux.ibm.com
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