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powerpc/64: Allow for relocation-on interrupts from guest to host

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With host and guest both using radix translation, it is feasible
for the host to take interrupts that come from the guest with
relocation on, and that is in fact what the POWER9 hardware will
do when LPCR[AIL] = 3.  All such interrupts use HSRR0/1 not SRR0/1
except for system call with LEV=1 (hcall).

Therefore this adds the KVM tests to the _HV variants of the
relocation-on interrupt handlers, and adds the KVM test to the
relocation-on system call entry point.

We also instantiate the relocation-on versions of the hypervisor
data storage and instruction interrupt handlers, since these can
occur with relocation on in radix guests.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Paul Mackerras 2017-01-30 21:21:40 +11:00 • committed by Michael Ellerman
parent 16ed141677
commit bc3551257a
2 changed files with 34 additions and 29 deletions
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10
arch/powerpc/include/asm/exception-64s.h
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@ -428,12 +428,12 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_STD)
#define STD_RELON_EXCEPTION_HV(loc, vec, label) \
/* No guest interrupts come through here */ \
SET_SCRATCH0(r13); /* save r13 */ \
EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, EXC_HV, NOTEST, vec);
EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, \
EXC_HV, KVMTEST_HV, vec);
#define STD_RELON_EXCEPTION_HV_OOL(vec, label) \
EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \
EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec); \
EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_HV)
/* This associate vector numbers with bits in paca->irq_happened */
@ -510,10 +510,10 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
#define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label) \
_MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \
EXC_HV, SOFTEN_NOTEST_HV)
EXC_HV, SOFTEN_TEST_HV)
#define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label) \
EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_HV, vec); \
EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec); \
EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV)
/*