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powerpc/prom_init: Add the ESM call to prom_init

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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: Ram Pai <linuxram@us.ibm.com>
[ andmike: Generate an RTAS os-term hcall when the ESM ucall fails. ]
Signed-off-by: Michael Anderson <andmike@linux.ibm.com>
[ bauerman: Cleaned up the code a bit. ]
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190820021326.6884-5-bauerman@linux.ibm.com
This commit is contained in:
Ram Pai
2019-08-19 23:13:14 -03:00
committed by Michael Ellerman
parent 528229d210
commit 6a9c930bd7
3 changed files with 102 additions and 0 deletions
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arch/powerpc/include/asm/ultravisor-api.h
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@@ -25,5 +25,6 @@
/* opcodes */
#define UV_WRITE_PATE 0xF104
#define UV_RETURN 0xF11C
#define UV_ESM 0xF110
#endif /* _ASM_POWERPC_ULTRAVISOR_API_H */