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powerpc/pseries: Introduce option to build secure virtual machines
Introduce CONFIG_PPC_SVM to control support for secure guests and include Ultravisor-related helpers when it is selected 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/20190820021326.6884-3-bauerman@linux.ibm.com
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@ -36,7 +36,7 @@ void __trace_hcall_entry(unsigned long opcode, unsigned long *args);
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void __trace_hcall_exit(long opcode, long retval, unsigned long *retbuf);
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/* Ultravisor */
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#ifdef CONFIG_PPC_POWERNV
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#if defined(CONFIG_PPC_POWERNV) || defined(CONFIG_PPC_SVM)
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long ucall_norets(unsigned long opcode, ...);
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#else
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static inline long ucall_norets(unsigned long opcode, ...)
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@ -156,7 +156,9 @@ endif
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obj-$(CONFIG_EPAPR_PARAVIRT) += epapr_paravirt.o epapr_hcalls.o
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obj-$(CONFIG_KVM_GUEST) += kvm.o kvm_emul.o
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obj-$(CONFIG_PPC_POWERNV) += ucall.o
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ifneq ($(CONFIG_PPC_POWERNV)$(CONFIG_PPC_SVM),)
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obj-y += ucall.o
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endif
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# Disable GCOV, KCOV & sanitizers in odd or sensitive code
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GCOV_PROFILE_prom_init.o := n
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@ -145,3 +145,14 @@ config PAPR_SCM
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tristate "Support for the PAPR Storage Class Memory interface"
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help
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Enable access to hypervisor provided storage class memory.
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config PPC_SVM
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bool "Secure virtual machine (SVM) support for POWER"
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depends on PPC_PSERIES
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help
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There are certain POWER platforms which support secure guests using
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the Protected Execution Facility, with the help of an Ultravisor
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executing below the hypervisor layer. This enables support for
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those guests.
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If unsure, say "N".
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