[PATCH 10/13] KVM: PPC: Book3S HV: move bad_host_intr check to HV handler
From: Nicholas Piggin <npiggin@gmail.com>
Date: 2021-02-19 06:40:38
Subsystem:
kernel virtual machine for powerpc (kvm/powerpc), linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
This is not used by PR KVM. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> --- arch/powerpc/kvm/book3s_64_entry.S | 3 --- arch/powerpc/kvm/book3s_hv_rmhandlers.S | 4 +++- arch/powerpc/kvm/book3s_segment.S | 7 +++++++ 3 files changed, 10 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_64_entry.S b/arch/powerpc/kvm/book3s_64_entry.S
index ef946e202773..6b2fda5dee38 100644
--- a/arch/powerpc/kvm/book3s_64_entry.S
+++ b/arch/powerpc/kvm/book3s_64_entry.S@@ -77,11 +77,8 @@ do_kvm_interrupt: beq- .Lmaybe_skip .Lno_skip: #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE - 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_SCRATCH2(r13) beq kvmppc_interrupt_pr #endif b kvmppc_interrupt_hv
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index bbf786a0c0d6..eff4437e381c 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S@@ -1251,6 +1251,7 @@ hdec_soon: kvmppc_interrupt_hv: /* * Register contents: + * R9 = HSTATE_IN_GUEST * R12 = (guest CR << 32) | interrupt vector * R13 = PACA * guest R12 saved in shadow VCPU SCRATCH0
@@ -1258,6 +1259,8 @@ kvmppc_interrupt_hv: * guest R9 saved in HSTATE_SCRATCH2 */ /* We're now back in the host but in guest MMU context */ + cmpwi r9,KVM_GUEST_MODE_HOST_HV + beq kvmppc_bad_host_intr li r9, KVM_GUEST_MODE_HOST_HV stb r9, HSTATE_IN_GUEST(r13)
@@ -3254,7 +3257,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_P9_TM_HV_ASSIST) * cfar is saved in HSTATE_CFAR(r13) * ppr is saved in HSTATE_PPR(r13) */ -.global kvmppc_bad_host_intr kvmppc_bad_host_intr: /* * Switch to the emergency stack, but start half-way down in
diff --git a/arch/powerpc/kvm/book3s_segment.S b/arch/powerpc/kvm/book3s_segment.S
index 1f492aa4c8d6..ef1d88b869bf 100644
--- a/arch/powerpc/kvm/book3s_segment.S
+++ b/arch/powerpc/kvm/book3s_segment.S@@ -167,8 +167,15 @@ kvmppc_interrupt_pr: * R12 = (guest CR << 32) | exit handler id * R13 = PACA * HSTATE.SCRATCH0 = guest R12 + * + * If HV is possible, additionally: + * R9 = HSTATE_IN_GUEST + * HSTATE.SCRATCH2 = guest R9 */ #ifdef CONFIG_PPC64 +#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE + ld r9,HSTATE_SCRATCH2(r13) +#endif /* Match 32-bit entry */ rotldi r12, r12, 32 /* Flip R12 halves for stw */ stw r12, HSTATE_SCRATCH1(r13) /* CR is now in the low half */
--
2.23.0