From e5ee5422f8867d8b8108f8e1f0f47dc59b043f5b Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Mon, 5 May 2014 08:39:44 +0530 Subject: [PATCH] KVM: PPC: BOOK3S: PR: Enable Little Endian PR guest This patch make sure we inherit the LE bit correctly in different case so that we can run Little Endian distro in PR mode Signed-off-by: Aneesh Kumar K.V Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_host.h | 2 +- arch/powerpc/kernel/asm-offsets.c | 2 +- arch/powerpc/kvm/book3s_64_mmu.c | 2 +- arch/powerpc/kvm/book3s_pr.c | 23 ++++++++++++++++++++++- 4 files changed, 25 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 1eaea2dea174..d342f8efc843 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -562,6 +562,7 @@ struct kvm_vcpu_arch { #ifdef CONFIG_PPC_BOOK3S ulong fault_dar; u32 fault_dsisr; + unsigned long intr_msr; #endif #ifdef CONFIG_BOOKE @@ -654,7 +655,6 @@ struct kvm_vcpu_arch { spinlock_t tbacct_lock; u64 busy_stolen; u64 busy_preempt; - unsigned long intr_msr; #endif }; diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index dba8140ebc20..6a4b77d197f3 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -493,7 +493,6 @@ int main(void) DEFINE(VCPU_DAR, offsetof(struct kvm_vcpu, arch.shregs.dar)); DEFINE(VCPU_VPA, offsetof(struct kvm_vcpu, arch.vpa.pinned_addr)); DEFINE(VCPU_VPA_DIRTY, offsetof(struct kvm_vcpu, arch.vpa.dirty)); - DEFINE(VCPU_INTR_MSR, offsetof(struct kvm_vcpu, arch.intr_msr)); #endif #ifdef CONFIG_PPC_BOOK3S DEFINE(VCPU_VCPUID, offsetof(struct kvm_vcpu, vcpu_id)); @@ -528,6 +527,7 @@ int main(void) DEFINE(VCPU_SLB_NR, offsetof(struct kvm_vcpu, arch.slb_nr)); DEFINE(VCPU_FAULT_DSISR, offsetof(struct kvm_vcpu, arch.fault_dsisr)); DEFINE(VCPU_FAULT_DAR, offsetof(struct kvm_vcpu, arch.fault_dar)); + DEFINE(VCPU_INTR_MSR, offsetof(struct kvm_vcpu, arch.intr_msr)); DEFINE(VCPU_LAST_INST, offsetof(struct kvm_vcpu, arch.last_inst)); DEFINE(VCPU_TRAP, offsetof(struct kvm_vcpu, arch.trap)); DEFINE(VCPU_CFAR, offsetof(struct kvm_vcpu, arch.cfar)); diff --git a/arch/powerpc/kvm/book3s_64_mmu.c b/arch/powerpc/kvm/book3s_64_mmu.c index 83da1f868fd5..8231b83c493b 100644 --- a/arch/powerpc/kvm/book3s_64_mmu.c +++ b/arch/powerpc/kvm/book3s_64_mmu.c @@ -38,7 +38,7 @@ static void kvmppc_mmu_book3s_64_reset_msr(struct kvm_vcpu *vcpu) { - kvmppc_set_msr(vcpu, MSR_SF); + kvmppc_set_msr(vcpu, vcpu->arch.intr_msr); } static struct kvmppc_slb *kvmppc_mmu_book3s_64_find_slbe( diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index c5c052a9729c..8c05cb5877a9 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -249,7 +249,7 @@ static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu) ulong smsr = vcpu->arch.shared->msr; /* Guest MSR values */ - smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE; + smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_LE; /* Process MSR values */ smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE; /* External providers the guest reserved */ @@ -1110,6 +1110,15 @@ static int kvmppc_get_one_reg_pr(struct kvm_vcpu *vcpu, u64 id, case KVM_REG_PPC_HIOR: *val = get_reg_val(id, to_book3s(vcpu)->hior); break; + case KVM_REG_PPC_LPCR: + /* + * We are only interested in the LPCR_ILE bit + */ + if (vcpu->arch.intr_msr & MSR_LE) + *val = get_reg_val(id, LPCR_ILE); + else + *val = get_reg_val(id, 0); + break; default: r = -EINVAL; break; @@ -1118,6 +1127,14 @@ static int kvmppc_get_one_reg_pr(struct kvm_vcpu *vcpu, u64 id, return r; } +static void kvmppc_set_lpcr_pr(struct kvm_vcpu *vcpu, u64 new_lpcr) +{ + if (new_lpcr & LPCR_ILE) + vcpu->arch.intr_msr |= MSR_LE; + else + vcpu->arch.intr_msr &= ~MSR_LE; +} + static int kvmppc_set_one_reg_pr(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val) { @@ -1128,6 +1145,9 @@ static int kvmppc_set_one_reg_pr(struct kvm_vcpu *vcpu, u64 id, to_book3s(vcpu)->hior = set_reg_val(id, *val); to_book3s(vcpu)->hior_explicit = true; break; + case KVM_REG_PPC_LPCR: + kvmppc_set_lpcr_pr(vcpu, set_reg_val(id, *val)); + break; default: r = -EINVAL; break; @@ -1180,6 +1200,7 @@ static struct kvm_vcpu *kvmppc_core_vcpu_create_pr(struct kvm *kvm, vcpu->arch.pvr = 0x3C0301; if (mmu_has_feature(MMU_FTR_1T_SEGMENT)) vcpu->arch.pvr = mfspr(SPRN_PVR); + vcpu->arch.intr_msr = MSR_SF; #else /* default to book3s_32 (750) */ vcpu->arch.pvr = 0x84202;