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kvm: powerpc: book3s: Cleanup interrupt handling code

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With this patch if HV is included, interrupts come in to the HV version
of the kvmppc_interrupt code, which then jumps to the PR handler,
renamed to kvmppc_interrupt_pr, if the guest is a PR guest. This helps
in enabling both HV and PR, which we do in later patch

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Aneesh Kumar K.V 2013-10-07 22:17:55 +05:30 committed by Alexander Graf
parent 3a167beac0
commit dd96b2c2dc
3 changed files with 20 additions and 4 deletions
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11
arch/powerpc/include/asm/exception-64s.h
View File

@ -198,6 +198,17 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
cmpwi r10,0; \
bne do_kvm_##n
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
/*
* If hv is possible, interrupts come into to the hv version
* of the kvmppc_interrupt code, which then jumps to the PR handler,
* kvmppc_interrupt_pr, if the guest is a PR guest.
*/
#define kvmppc_interrupt kvmppc_interrupt_hv
#else
#define kvmppc_interrupt kvmppc_interrupt_pr
#endif
#define __KVM_HANDLER(area, h, n) \
do_kvm_##n: \
BEGIN_FTR_SECTION_NESTED(947) \

9
arch/powerpc/kvm/book3s_hv_rmhandlers.S
View File

@ -742,8 +742,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
/*
* We come here from the first-level interrupt handlers.
*/
.globl kvmppc_interrupt
kvmppc_interrupt:
.globl kvmppc_interrupt_hv
kvmppc_interrupt_hv:
/*
* Register contents:
* R12 = interrupt vector
@ -757,6 +757,11 @@ kvmppc_interrupt:
lbz r9, HSTATE_IN_GUEST(r13)
cmpwi r9, KVM_GUEST_MODE_HOST_HV
beq kvmppc_bad_host_intr
#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
cmpwi r9, KVM_GUEST_MODE_GUEST
ld r9, HSTATE_HOST_R2(r13)
beq kvmppc_interrupt_pr
#endif
/* We're now back in the host but in guest MMU context */
li r9, KVM_GUEST_MODE_HOST_HV
stb r9, HSTATE_IN_GUEST(r13)

4
arch/powerpc/kvm/book3s_segment.S
View File

@ -161,8 +161,8 @@ kvmppc_handler_trampoline_enter_end:
.global kvmppc_handler_trampoline_exit
kvmppc_handler_trampoline_exit:
.global kvmppc_interrupt
kvmppc_interrupt:
.global kvmppc_interrupt_pr
kvmppc_interrupt_pr:
/* Register usage at this point:
*