mirror of https://gitee.com/openkylin/linux.git
powerpc, KVM: Rework KVM checks in first-level interrupt handlers
Instead of branching out-of-line with the DO_KVM macro to check if we are in a KVM guest at the time of an interrupt, this moves the KVM check inline in the first-level interrupt handlers. This speeds up the non-KVM case and makes sure that none of the interrupt handlers are missing the check. Because the first-level interrupt handlers are now larger, some things had to be move out of line in exceptions-64s.S. This all necessitated some minor changes to the interrupt entry code in KVM. This also streamlines the book3s_32 KVM test. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
parent
f05ed4d56e
commit
b01c8b54a1
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@ -61,19 +61,22 @@
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#define EXC_HV H
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#define EXC_STD
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#define EXCEPTION_PROLOG_1(area) \
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#define __EXCEPTION_PROLOG_1(area, extra, vec) \
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GET_PACA(r13); \
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std r9,area+EX_R9(r13); /* save r9 - r12 */ \
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std r10,area+EX_R10(r13); \
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std r11,area+EX_R11(r13); \
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std r12,area+EX_R12(r13); \
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BEGIN_FTR_SECTION_NESTED(66); \
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mfspr r10,SPRN_CFAR; \
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std r10,area+EX_CFAR(r13); \
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END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \
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GET_SCRATCH0(r9); \
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std r9,area+EX_R13(r13); \
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mfcr r9
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mfcr r9; \
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extra(vec); \
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std r11,area+EX_R11(r13); \
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std r12,area+EX_R12(r13); \
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GET_SCRATCH0(r10); \
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std r10,area+EX_R13(r13)
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#define EXCEPTION_PROLOG_1(area, extra, vec) \
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__EXCEPTION_PROLOG_1(area, extra, vec)
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#define __EXCEPTION_PROLOG_PSERIES_1(label, h) \
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ld r12,PACAKBASE(r13); /* get high part of &label */ \
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@ -85,13 +88,54 @@
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mtspr SPRN_##h##SRR1,r10; \
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h##rfid; \
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b . /* prevent speculative execution */
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#define EXCEPTION_PROLOG_PSERIES_1(label, h) \
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#define EXCEPTION_PROLOG_PSERIES_1(label, h) \
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__EXCEPTION_PROLOG_PSERIES_1(label, h)
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#define EXCEPTION_PROLOG_PSERIES(area, label, h) \
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EXCEPTION_PROLOG_1(area); \
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#define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec) \
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EXCEPTION_PROLOG_1(area, extra, vec); \
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EXCEPTION_PROLOG_PSERIES_1(label, h);
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#define __KVMTEST(n) \
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lbz r10,PACA_KVM_SVCPU+SVCPU_IN_GUEST(r13); \
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cmpwi r10,0; \
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bne do_kvm_##n
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#define __KVM_HANDLER(area, h, n) \
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do_kvm_##n: \
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ld r10,area+EX_R10(r13); \
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stw r9,PACA_KVM_SVCPU+SVCPU_SCRATCH1(r13); \
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ld r9,area+EX_R9(r13); \
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std r12,PACA_KVM_SVCPU+SVCPU_SCRATCH0(r13); \
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li r12,n; \
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b kvmppc_interrupt
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#define __KVM_HANDLER_SKIP(area, h, n) \
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do_kvm_##n: \
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cmpwi r10,KVM_GUEST_MODE_SKIP; \
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ld r10,area+EX_R10(r13); \
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beq 89f; \
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stw r9,PACA_KVM_SVCPU+SVCPU_SCRATCH1(r13); \
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ld r9,area+EX_R9(r13); \
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std r12,PACA_KVM_SVCPU+SVCPU_SCRATCH0(r13); \
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li r12,n; \
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b kvmppc_interrupt; \
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89: mtocrf 0x80,r9; \
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ld r9,area+EX_R9(r13); \
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b kvmppc_skip_##h##interrupt
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#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
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#define KVMTEST(n) __KVMTEST(n)
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#define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n)
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#define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n)
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#else
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#define KVMTEST(n)
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#define KVM_HANDLER(area, h, n)
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#define KVM_HANDLER_SKIP(area, h, n)
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#endif
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#define NOTEST(n)
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/*
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* The common exception prolog is used for all except a few exceptions
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* such as a segment miss on a kernel address. We have to be prepared
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@ -164,57 +208,54 @@
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.globl label##_pSeries; \
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label##_pSeries: \
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HMT_MEDIUM; \
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DO_KVM vec; \
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SET_SCRATCH0(r13); /* save r13 */ \
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EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, EXC_STD)
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EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
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EXC_STD, KVMTEST, vec)
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#define STD_EXCEPTION_HV(loc, vec, label) \
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. = loc; \
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.globl label##_hv; \
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label##_hv: \
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HMT_MEDIUM; \
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DO_KVM vec; \
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SET_SCRATCH0(r13); /* save r13 */ \
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EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, EXC_HV)
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SET_SCRATCH0(r13); /* save r13 */ \
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EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
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EXC_HV, KVMTEST, vec)
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#define __MASKABLE_EXCEPTION_PSERIES(vec, label, h) \
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HMT_MEDIUM; \
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DO_KVM vec; \
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SET_SCRATCH0(r13); /* save r13 */ \
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GET_PACA(r13); \
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std r9,PACA_EXGEN+EX_R9(r13); /* save r9, r10 */ \
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std r10,PACA_EXGEN+EX_R10(r13); \
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#define __SOFTEN_TEST(h) \
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lbz r10,PACASOFTIRQEN(r13); \
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mfcr r9; \
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cmpwi r10,0; \
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beq masked_##h##interrupt; \
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GET_SCRATCH0(r10); \
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std r10,PACA_EXGEN+EX_R13(r13); \
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std r11,PACA_EXGEN+EX_R11(r13); \
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std r12,PACA_EXGEN+EX_R12(r13); \
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ld r12,PACAKBASE(r13); /* get high part of &label */ \
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ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \
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mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \
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LOAD_HANDLER(r12,label##_common) \
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mtspr SPRN_##h##SRR0,r12; \
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mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \
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mtspr SPRN_##h##SRR1,r10; \
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h##rfid; \
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b . /* prevent speculative execution */
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#define _MASKABLE_EXCEPTION_PSERIES(vec, label, h) \
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__MASKABLE_EXCEPTION_PSERIES(vec, label, h)
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beq masked_##h##interrupt
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#define _SOFTEN_TEST(h) __SOFTEN_TEST(h)
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#define SOFTEN_TEST(vec) \
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KVMTEST(vec); \
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_SOFTEN_TEST(EXC_STD)
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#define SOFTEN_TEST_HV(vec) \
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KVMTEST(vec); \
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_SOFTEN_TEST(EXC_HV)
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#define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \
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HMT_MEDIUM; \
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SET_SCRATCH0(r13); /* save r13 */ \
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__EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \
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EXCEPTION_PROLOG_PSERIES_1(label##_common, h);
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#define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \
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__MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)
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#define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \
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. = loc; \
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.globl label##_pSeries; \
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label##_pSeries: \
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_MASKABLE_EXCEPTION_PSERIES(vec, label, EXC_STD)
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_MASKABLE_EXCEPTION_PSERIES(vec, label, \
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EXC_STD, SOFTEN_TEST)
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#define MASKABLE_EXCEPTION_HV(loc, vec, label) \
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. = loc; \
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.globl label##_hv; \
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label##_hv: \
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_MASKABLE_EXCEPTION_PSERIES(vec, label, EXC_HV)
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_MASKABLE_EXCEPTION_PSERIES(vec, label, \
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EXC_HV, SOFTEN_TEST_HV)
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#ifdef CONFIG_PPC_ISERIES
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#define DISABLE_INTS \
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@ -40,7 +40,6 @@ __start_interrupts:
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.globl system_reset_pSeries;
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system_reset_pSeries:
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HMT_MEDIUM;
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DO_KVM 0x100;
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SET_SCRATCH0(r13)
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#ifdef CONFIG_PPC_P7_NAP
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BEGIN_FTR_SECTION
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beq .
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END_FTR_SECTION_IFSET(CPU_FTR_HVMODE_206)
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#endif /* CONFIG_PPC_P7_NAP */
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EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD)
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EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD,
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NOTEST, 0x100)
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. = 0x200
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_machine_check_pSeries:
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HMT_MEDIUM
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DO_KVM 0x200
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SET_SCRATCH0(r13)
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EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common, EXC_STD)
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machine_check_pSeries_1:
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/* This is moved out of line as it can be patched by FW, but
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* some code path might still want to branch into the original
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* vector
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*/
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b machine_check_pSeries
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. = 0x300
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.globl data_access_pSeries
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data_access_pSeries:
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HMT_MEDIUM
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DO_KVM 0x300
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SET_SCRATCH0(r13)
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#ifndef CONFIG_POWER4_ONLY
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BEGIN_FTR_SECTION
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GET_PACA(r13)
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std r9,PACA_EXSLB+EX_R9(r13)
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std r10,PACA_EXSLB+EX_R10(r13)
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mfspr r10,SPRN_DAR
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mfspr r9,SPRN_DSISR
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srdi r10,r10,60
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rlwimi r10,r9,16,0x20
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mfcr r9
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cmpwi r10,0x2c
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beq do_stab_bolted_pSeries
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ld r10,PACA_EXSLB+EX_R10(r13)
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std r11,PACA_EXGEN+EX_R11(r13)
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ld r11,PACA_EXSLB+EX_R9(r13)
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std r12,PACA_EXGEN+EX_R12(r13)
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GET_SCRATCH0(r12)
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std r10,PACA_EXGEN+EX_R10(r13)
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std r11,PACA_EXGEN+EX_R9(r13)
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std r12,PACA_EXGEN+EX_R13(r13)
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EXCEPTION_PROLOG_PSERIES_1(data_access_common, EXC_STD)
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FTR_SECTION_ELSE
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EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common, EXC_STD)
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ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_SLB)
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b data_access_check_stab
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data_access_not_stab:
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END_MMU_FTR_SECTION_IFCLR(MMU_FTR_SLB)
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#endif
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EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, data_access_common, EXC_STD,
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KVMTEST, 0x300)
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. = 0x380
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.globl data_access_slb_pSeries
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data_access_slb_pSeries:
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HMT_MEDIUM
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DO_KVM 0x380
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SET_SCRATCH0(r13)
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GET_PACA(r13)
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EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x380)
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std r3,PACA_EXSLB+EX_R3(r13)
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mfspr r3,SPRN_DAR
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std r9,PACA_EXSLB+EX_R9(r13) /* save r9 - r12 */
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mfcr r9
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#ifdef __DISABLED__
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/* Keep that around for when we re-implement dynamic VSIDs */
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cmpdi r3,0
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bge slb_miss_user_pseries
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#endif /* __DISABLED__ */
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std r10,PACA_EXSLB+EX_R10(r13)
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std r11,PACA_EXSLB+EX_R11(r13)
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std r12,PACA_EXSLB+EX_R12(r13)
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GET_SCRATCH0(r10)
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std r10,PACA_EXSLB+EX_R13(r13)
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mfspr r12,SPRN_SRR1 /* and SRR1 */
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mfspr r12,SPRN_SRR1
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#ifndef CONFIG_RELOCATABLE
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b .slb_miss_realmode
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#else
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.globl instruction_access_slb_pSeries
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instruction_access_slb_pSeries:
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HMT_MEDIUM
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DO_KVM 0x480
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SET_SCRATCH0(r13)
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GET_PACA(r13)
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EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST, 0x480)
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std r3,PACA_EXSLB+EX_R3(r13)
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mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */
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std r9,PACA_EXSLB+EX_R9(r13) /* save r9 - r12 */
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mfcr r9
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#ifdef __DISABLED__
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/* Keep that around for when we re-implement dynamic VSIDs */
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cmpdi r3,0
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bge slb_miss_user_pseries
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#endif /* __DISABLED__ */
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std r10,PACA_EXSLB+EX_R10(r13)
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std r11,PACA_EXSLB+EX_R11(r13)
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std r12,PACA_EXSLB+EX_R12(r13)
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GET_SCRATCH0(r10)
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std r10,PACA_EXSLB+EX_R13(r13)
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mfspr r12,SPRN_SRR1 /* and SRR1 */
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mfspr r12,SPRN_SRR1
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#ifndef CONFIG_RELOCATABLE
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b .slb_miss_realmode
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#else
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hardware_interrupt_pSeries:
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hardware_interrupt_hv:
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BEGIN_FTR_SECTION
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_MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt, EXC_STD)
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_MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt,
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EXC_STD, SOFTEN_TEST)
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KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x500)
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FTR_SECTION_ELSE
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_MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt, EXC_HV)
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_MASKABLE_EXCEPTION_PSERIES(0x502, hardware_interrupt,
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EXC_HV, SOFTEN_TEST_HV)
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KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x502)
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ALT_FTR_SECTION_END_IFCLR(CPU_FTR_HVMODE_206)
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STD_EXCEPTION_PSERIES(0x600, 0x600, alignment)
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KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x600)
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STD_EXCEPTION_PSERIES(0x700, 0x700, program_check)
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KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x700)
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STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable)
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KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x800)
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MASKABLE_EXCEPTION_PSERIES(0x900, 0x900, decrementer)
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MASKABLE_EXCEPTION_HV(0x980, 0x980, decrementer)
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MASKABLE_EXCEPTION_HV(0x980, 0x982, decrementer)
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STD_EXCEPTION_PSERIES(0xa00, 0xa00, trap_0a)
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KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xa00)
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STD_EXCEPTION_PSERIES(0xb00, 0xb00, trap_0b)
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KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xb00)
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. = 0xc00
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.globl system_call_pSeries
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system_call_pSeries:
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HMT_MEDIUM
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DO_KVM 0xc00
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#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
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SET_SCRATCH0(r13)
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GET_PACA(r13)
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std r9,PACA_EXGEN+EX_R9(r13)
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std r10,PACA_EXGEN+EX_R10(r13)
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mfcr r9
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KVMTEST(0xc00)
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GET_SCRATCH0(r13)
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#endif
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BEGIN_FTR_SECTION
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cmpdi r0,0x1ebe
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beq- 1f
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@ -220,6 +209,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE)
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rfid
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b . /* prevent speculative execution */
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KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xc00)
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/* Fast LE/BE switch system call */
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1: mfspr r12,SPRN_SRR1
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xori r12,r12,MSR_LE
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@ -228,6 +219,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE)
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b .
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STD_EXCEPTION_PSERIES(0xd00, 0xd00, single_step)
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KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xd00)
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/* At 0xe??? we have a bunch of hypervisor exceptions, we branch
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* out of line to handle them
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@ -262,30 +254,93 @@ vsx_unavailable_pSeries_1:
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#ifdef CONFIG_CBE_RAS
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STD_EXCEPTION_HV(0x1200, 0x1202, cbe_system_error)
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KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1202)
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#endif /* CONFIG_CBE_RAS */
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STD_EXCEPTION_PSERIES(0x1300, 0x1300, instruction_breakpoint)
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KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x1300)
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|
||||
#ifdef CONFIG_CBE_RAS
|
||||
STD_EXCEPTION_HV(0x1600, 0x1602, cbe_maintenance)
|
||||
KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1602)
|
||||
#endif /* CONFIG_CBE_RAS */
|
||||
|
||||
STD_EXCEPTION_PSERIES(0x1700, 0x1700, altivec_assist)
|
||||
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x1700)
|
||||
|
||||
#ifdef CONFIG_CBE_RAS
|
||||
STD_EXCEPTION_HV(0x1800, 0x1802, cbe_thermal)
|
||||
KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0x1802)
|
||||
#endif /* CONFIG_CBE_RAS */
|
||||
|
||||
. = 0x3000
|
||||
|
||||
/*** Out of line interrupts support ***/
|
||||
|
||||
/* moved from 0x200 */
|
||||
machine_check_pSeries:
|
||||
.globl machine_check_fwnmi
|
||||
machine_check_fwnmi:
|
||||
HMT_MEDIUM
|
||||
SET_SCRATCH0(r13) /* save r13 */
|
||||
EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common,
|
||||
EXC_STD, KVMTEST, 0x200)
|
||||
KVM_HANDLER_SKIP(PACA_EXMC, EXC_STD, 0x200)
|
||||
|
||||
#ifndef CONFIG_POWER4_ONLY
|
||||
/* moved from 0x300 */
|
||||
data_access_check_stab:
|
||||
GET_PACA(r13)
|
||||
std r9,PACA_EXSLB+EX_R9(r13)
|
||||
std r10,PACA_EXSLB+EX_R10(r13)
|
||||
mfspr r10,SPRN_DAR
|
||||
mfspr r9,SPRN_DSISR
|
||||
srdi r10,r10,60
|
||||
rlwimi r10,r9,16,0x20
|
||||
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
|
||||
lbz r9,PACA_KVM_SVCPU+SVCPU_IN_GUEST(r13)
|
||||
rlwimi r10,r9,8,0x300
|
||||
#endif
|
||||
mfcr r9
|
||||
cmpwi r10,0x2c
|
||||
beq do_stab_bolted_pSeries
|
||||
mtcrf 0x80,r9
|
||||
ld r9,PACA_EXSLB+EX_R9(r13)
|
||||
ld r10,PACA_EXSLB+EX_R10(r13)
|
||||
b data_access_not_stab
|
||||
do_stab_bolted_pSeries:
|
||||
std r11,PACA_EXSLB+EX_R11(r13)
|
||||
std r12,PACA_EXSLB+EX_R12(r13)
|
||||
GET_SCRATCH0(r10)
|
||||
std r10,PACA_EXSLB+EX_R13(r13)
|
||||
EXCEPTION_PROLOG_PSERIES_1(.do_stab_bolted, EXC_STD)
|
||||
#endif /* CONFIG_POWER4_ONLY */
|
||||
|
||||
KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x300)
|
||||
KVM_HANDLER_SKIP(PACA_EXSLB, EXC_STD, 0x380)
|
||||
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x400)
|
||||
KVM_HANDLER(PACA_EXSLB, EXC_STD, 0x480)
|
||||
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0x900)
|
||||
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0x982)
|
||||
|
||||
.align 7
|
||||
/* moved from 0xe00 */
|
||||
STD_EXCEPTION_HV(., 0xe00, h_data_storage)
|
||||
STD_EXCEPTION_HV(., 0xe20, h_instr_storage)
|
||||
STD_EXCEPTION_HV(., 0xe40, emulation_assist)
|
||||
STD_EXCEPTION_HV(., 0xe60, hmi_exception) /* need to flush cache ? */
|
||||
STD_EXCEPTION_HV(., 0xe02, h_data_storage)
|
||||
KVM_HANDLER_SKIP(PACA_EXGEN, EXC_HV, 0xe02)
|
||||
STD_EXCEPTION_HV(., 0xe22, h_instr_storage)
|
||||
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe22)
|
||||
STD_EXCEPTION_HV(., 0xe42, emulation_assist)
|
||||
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe42)
|
||||
STD_EXCEPTION_HV(., 0xe62, hmi_exception) /* need to flush cache ? */
|
||||
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe62)
|
||||
|
||||
/* moved from 0xf00 */
|
||||
STD_EXCEPTION_PSERIES(., 0xf00, performance_monitor)
|
||||
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf00)
|
||||
STD_EXCEPTION_PSERIES(., 0xf20, altivec_unavailable)
|
||||
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf20)
|
||||
STD_EXCEPTION_PSERIES(., 0xf40, vsx_unavailable)
|
||||
KVM_HANDLER(PACA_EXGEN, EXC_STD, 0xf40)
|
||||
|
||||
/*
|
||||
* An interrupt came in while soft-disabled; clear EE in SRR1,
|
||||
|
@ -317,14 +372,6 @@ masked_Hinterrupt:
|
|||
hrfid
|
||||
b .
|
||||
|
||||
.align 7
|
||||
do_stab_bolted_pSeries:
|
||||
std r11,PACA_EXSLB+EX_R11(r13)
|
||||
std r12,PACA_EXSLB+EX_R12(r13)
|
||||
GET_SCRATCH0(r10)
|
||||
std r10,PACA_EXSLB+EX_R13(r13)
|
||||
EXCEPTION_PROLOG_PSERIES_1(.do_stab_bolted, EXC_STD)
|
||||
|
||||
#ifdef CONFIG_PPC_PSERIES
|
||||
/*
|
||||
* Vectors for the FWNMI option. Share common code.
|
||||
|
@ -334,14 +381,8 @@ do_stab_bolted_pSeries:
|
|||
system_reset_fwnmi:
|
||||
HMT_MEDIUM
|
||||
SET_SCRATCH0(r13) /* save r13 */
|
||||
EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD)
|
||||
|
||||
.globl machine_check_fwnmi
|
||||
.align 7
|
||||
machine_check_fwnmi:
|
||||
HMT_MEDIUM
|
||||
SET_SCRATCH0(r13) /* save r13 */
|
||||
EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common, EXC_STD)
|
||||
EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common, EXC_STD,
|
||||
NOTEST, 0x100)
|
||||
|
||||
#endif /* CONFIG_PPC_PSERIES */
|
||||
|
||||
|
|
|
@ -40,37 +40,42 @@
|
|||
#define MSR_NOIRQ MSR_KERNEL & ~(MSR_IR | MSR_DR)
|
||||
#define FUNC(name) GLUE(.,name)
|
||||
|
||||
#elif defined(CONFIG_PPC_BOOK3S_32)
|
||||
kvmppc_skip_interrupt:
|
||||
/*
|
||||
* Here all GPRs are unchanged from when the interrupt happened
|
||||
* except for r13, which is saved in SPRG_SCRATCH0.
|
||||
*/
|
||||
mfspr r13, SPRN_SRR0
|
||||
addi r13, r13, 4
|
||||
mtspr SPRN_SRR0, r13
|
||||
GET_SCRATCH0(r13)
|
||||
rfid
|
||||
b .
|
||||
|
||||
#define LOAD_SHADOW_VCPU(reg) \
|
||||
mfspr reg, SPRN_SPRG_THREAD; \
|
||||
lwz reg, THREAD_KVM_SVCPU(reg); \
|
||||
/* PPC32 can have a NULL pointer - let's check for that */ \
|
||||
mtspr SPRN_SPRG_SCRATCH1, r12; /* Save r12 */ \
|
||||
mfcr r12; \
|
||||
cmpwi reg, 0; \
|
||||
bne 1f; \
|
||||
mfspr reg, SPRN_SPRG_SCRATCH0; \
|
||||
mtcr r12; \
|
||||
mfspr r12, SPRN_SPRG_SCRATCH1; \
|
||||
b kvmppc_resume_\intno; \
|
||||
1:; \
|
||||
mtcr r12; \
|
||||
mfspr r12, SPRN_SPRG_SCRATCH1; \
|
||||
tophys(reg, reg)
|
||||
kvmppc_skip_Hinterrupt:
|
||||
/*
|
||||
* Here all GPRs are unchanged from when the interrupt happened
|
||||
* except for r13, which is saved in SPRG_SCRATCH0.
|
||||
*/
|
||||
mfspr r13, SPRN_HSRR0
|
||||
addi r13, r13, 4
|
||||
mtspr SPRN_HSRR0, r13
|
||||
GET_SCRATCH0(r13)
|
||||
hrfid
|
||||
b .
|
||||
|
||||
#elif defined(CONFIG_PPC_BOOK3S_32)
|
||||
|
||||
#define SHADOW_VCPU_OFF 0
|
||||
#define MSR_NOIRQ MSR_KERNEL
|
||||
#define FUNC(name) name
|
||||
|
||||
#endif
|
||||
|
||||
.macro INTERRUPT_TRAMPOLINE intno
|
||||
|
||||
.global kvmppc_trampoline_\intno
|
||||
kvmppc_trampoline_\intno:
|
||||
|
||||
SET_SCRATCH0(r13) /* Save r13 */
|
||||
mtspr SPRN_SPRG_SCRATCH0, r13 /* Save r13 */
|
||||
|
||||
/*
|
||||
* First thing to do is to find out if we're coming
|
||||
|
@ -78,19 +83,28 @@ kvmppc_trampoline_\intno:
|
|||
*
|
||||
* To distinguish, we check a magic byte in the PACA/current
|
||||
*/
|
||||
LOAD_SHADOW_VCPU(r13)
|
||||
PPC_STL r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH0)(r13)
|
||||
mfspr r13, SPRN_SPRG_THREAD
|
||||
lwz r13, THREAD_KVM_SVCPU(r13)
|
||||
/* PPC32 can have a NULL pointer - let's check for that */
|
||||
mtspr SPRN_SPRG_SCRATCH1, r12 /* Save r12 */
|
||||
mfcr r12
|
||||
cmpwi r13, 0
|
||||
bne 1f
|
||||
2: mtcr r12
|
||||
mfspr r12, SPRN_SPRG_SCRATCH1
|
||||
mfspr r13, SPRN_SPRG_SCRATCH0 /* r13 = original r13 */
|
||||
b kvmppc_resume_\intno /* Get back original handler */
|
||||
|
||||
1: tophys(r13, r13)
|
||||
stw r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH1)(r13)
|
||||
mfspr r12, SPRN_SPRG_SCRATCH1
|
||||
stw r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH0)(r13)
|
||||
lbz r12, (SHADOW_VCPU_OFF + SVCPU_IN_GUEST)(r13)
|
||||
cmpwi r12, KVM_GUEST_MODE_NONE
|
||||
bne ..kvmppc_handler_hasmagic_\intno
|
||||
/* No KVM guest? Then jump back to the Linux handler! */
|
||||
lwz r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH1)(r13)
|
||||
mtcr r12
|
||||
PPC_LL r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH0)(r13)
|
||||
GET_SCRATCH0(r13) /* r13 = original r13 */
|
||||
b kvmppc_resume_\intno /* Get back original handler */
|
||||
b 2b
|
||||
|
||||
/* Now we know we're handling a KVM guest */
|
||||
..kvmppc_handler_hasmagic_\intno:
|
||||
|
@ -112,9 +126,6 @@ INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_MACHINE_CHECK
|
|||
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_STORAGE
|
||||
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_STORAGE
|
||||
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_EXTERNAL
|
||||
#ifdef CONFIG_PPC_BOOK3S_64
|
||||
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_EXTERNAL_HV
|
||||
#endif
|
||||
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALIGNMENT
|
||||
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PROGRAM
|
||||
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_FP_UNAVAIL
|
||||
|
@ -124,14 +135,6 @@ INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_TRACE
|
|||
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PERFMON
|
||||
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALTIVEC
|
||||
|
||||
/* Those are only available on 64 bit machines */
|
||||
|
||||
#ifdef CONFIG_PPC_BOOK3S_64
|
||||
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_SEGMENT
|
||||
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_SEGMENT
|
||||
INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_VSX
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Bring us back to the faulting code, but skip the
|
||||
* faulting instruction.
|
||||
|
@ -163,6 +166,7 @@ kvmppc_handler_skip_ins:
|
|||
|
||||
/* And get back into the code */
|
||||
RFI
|
||||
#endif
|
||||
|
||||
/*
|
||||
* This trampoline brings us back to a real mode handler
|
||||
|
|
|
@ -125,6 +125,9 @@ kvmppc_handler_trampoline_enter_end:
|
|||
.global kvmppc_handler_trampoline_exit
|
||||
kvmppc_handler_trampoline_exit:
|
||||
|
||||
.global kvmppc_interrupt
|
||||
kvmppc_interrupt:
|
||||
|
||||
/* Register usage at this point:
|
||||
*
|
||||
* SPRG_SCRATCH0 = guest R13
|
||||
|
@ -155,12 +158,16 @@ kvmppc_handler_trampoline_exit:
|
|||
PPC_LL r2, (SHADOW_VCPU_OFF + SVCPU_HOST_R2)(r13)
|
||||
|
||||
/* Save guest PC and MSR */
|
||||
#ifdef CONFIG_PPC64
|
||||
BEGIN_FTR_SECTION
|
||||
andi. r0,r12,0x2
|
||||
beq 1f
|
||||
mfspr r3,SPRN_HSRR0
|
||||
mfspr r4,SPRN_HSRR1
|
||||
andi. r12,r12,0x3ffd
|
||||
b 2f
|
||||
END_FTR_SECTION_IFSET(CPU_FTR_HVMODE_206)
|
||||
#endif
|
||||
1: mfsrr0 r3
|
||||
mfsrr1 r4
|
||||
2:
|
||||
|
|
|
@ -167,7 +167,7 @@ BEGIN_FTR_SECTION
|
|||
std r12,PACA_EXGEN+EX_R13(r13)
|
||||
EXCEPTION_PROLOG_ISERIES_1
|
||||
FTR_SECTION_ELSE
|
||||
EXCEPTION_PROLOG_1(PACA_EXGEN)
|
||||
EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0)
|
||||
EXCEPTION_PROLOG_ISERIES_1
|
||||
ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_SLB)
|
||||
b data_access_common
|
||||
|
|
|
@ -39,7 +39,7 @@
|
|||
label##_iSeries: \
|
||||
HMT_MEDIUM; \
|
||||
mtspr SPRN_SPRG_SCRATCH0,r13; /* save r13 */ \
|
||||
EXCEPTION_PROLOG_1(area); \
|
||||
EXCEPTION_PROLOG_1(area, NOTEST, 0); \
|
||||
EXCEPTION_PROLOG_ISERIES_1; \
|
||||
b label##_common
|
||||
|
||||
|
@ -48,7 +48,7 @@ label##_iSeries: \
|
|||
label##_iSeries: \
|
||||
HMT_MEDIUM; \
|
||||
mtspr SPRN_SPRG_SCRATCH0,r13; /* save r13 */ \
|
||||
EXCEPTION_PROLOG_1(PACA_EXGEN); \
|
||||
EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0); \
|
||||
lbz r10,PACASOFTIRQEN(r13); \
|
||||
cmpwi 0,r10,0; \
|
||||
beq- label##_iSeries_masked; \
|
||||
|
|
Loading…
Reference in New Issue