diff options
author | Jordan Niethe <jniethe5@gmail.com> | 2023-09-14 06:05:56 +0300 |
---|---|---|
committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-09-14 15:04:24 +0300 |
commit | 6de2e837babb411cfb3cdb570581c3a65576ddaf (patch) | |
tree | f03f9bc408505793515a111e21dfe91b451ab561 /arch/powerpc/kvm/book3s_hv.c | |
parent | ebc88ea7a6ad0ea349df9c765357d3aa4e662aa9 (diff) | |
download | linux-6de2e837babb411cfb3cdb570581c3a65576ddaf.tar.xz |
KVM: PPC: Book3S HV: Introduce low level MSR accessor
kvmppc_get_msr() and kvmppc_set_msr_fast() serve as accessors for the
MSR. However because the MSR is kept in the shared regs they include a
conditional check for kvmppc_shared_big_endian() and endian conversion.
Within the Book3S HV specific code there are direct reads and writes of
shregs::msr. In preparation for Nested APIv2 these accesses need to be
replaced with accessor functions so it is possible to extend their
behavior. However, using the kvmppc_get_msr() and kvmppc_set_msr_fast()
functions is undesirable because it would introduce a conditional branch
and endian conversion that is not currently present.
kvmppc_set_msr_hv() already exists, it is used for the
kvmppc_ops::set_msr callback.
Introduce a low level accessor __kvmppc_{s,g}et_msr_hv() that simply
gets and sets shregs::msr. This will be extend for Nested APIv2 support.
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230914030600.16993-8-jniethe5@gmail.com
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv.c')
-rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 25025f6c4cce..5743f32bf45e 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -1374,7 +1374,7 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) */ static void kvmppc_cede(struct kvm_vcpu *vcpu) { - vcpu->arch.shregs.msr |= MSR_EE; + __kvmppc_set_msr_hv(vcpu, __kvmppc_get_msr_hv(vcpu) | MSR_EE); vcpu->arch.ceded = 1; smp_mb(); if (vcpu->arch.prodded) { @@ -1589,7 +1589,7 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu, * That can happen due to a bug, or due to a machine check * occurring at just the wrong time. */ - if (vcpu->arch.shregs.msr & MSR_HV) { + if (__kvmppc_get_msr_hv(vcpu) & MSR_HV) { printk(KERN_EMERG "KVM trap in HV mode!\n"); printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", vcpu->arch.trap, kvmppc_get_pc(vcpu), @@ -1640,7 +1640,7 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu, * so that it knows that the machine check occurred. */ if (!vcpu->kvm->arch.fwnmi_enabled) { - ulong flags = (vcpu->arch.shregs.msr & 0x083c0000) | + ulong flags = (__kvmppc_get_msr_hv(vcpu) & 0x083c0000) | (kvmppc_get_msr(vcpu) & SRR1_PREFIXED); kvmppc_core_queue_machine_check(vcpu, flags); r = RESUME_GUEST; @@ -1670,7 +1670,7 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu, * as a result of a hypervisor emulation interrupt * (e40) getting turned into a 700 by BML RTAS. */ - flags = (vcpu->arch.shregs.msr & 0x1f0000ull) | + flags = (__kvmppc_get_msr_hv(vcpu) & 0x1f0000ull) | (kvmppc_get_msr(vcpu) & SRR1_PREFIXED); kvmppc_core_queue_program(vcpu, flags); r = RESUME_GUEST; @@ -1680,7 +1680,7 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu, { int i; - if (unlikely(vcpu->arch.shregs.msr & MSR_PR)) { + if (unlikely(__kvmppc_get_msr_hv(vcpu) & MSR_PR)) { /* * Guest userspace executed sc 1. This can only be * reached by the P9 path because the old path @@ -1758,7 +1758,7 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu, break; } - if (!(vcpu->arch.shregs.msr & MSR_DR)) + if (!(__kvmppc_get_msr_hv(vcpu) & MSR_DR)) vsid = vcpu->kvm->arch.vrma_slb_v; else vsid = vcpu->arch.fault_gpa; @@ -1782,7 +1782,7 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu, long err; vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); - vcpu->arch.fault_dsisr = vcpu->arch.shregs.msr & + vcpu->arch.fault_dsisr = __kvmppc_get_msr_hv(vcpu) & DSISR_SRR1_MATCH_64S; if (kvm_is_radix(vcpu->kvm) || !cpu_has_feature(CPU_FTR_ARCH_300)) { /* @@ -1791,7 +1791,7 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu, * hash fault handling below is v3 only (it uses ASDR * via fault_gpa). */ - if (vcpu->arch.shregs.msr & HSRR1_HISI_WRITE) + if (__kvmppc_get_msr_hv(vcpu) & HSRR1_HISI_WRITE) vcpu->arch.fault_dsisr |= DSISR_ISSTORE; r = RESUME_PAGE_FAULT; break; @@ -1805,7 +1805,7 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu, break; } - if (!(vcpu->arch.shregs.msr & MSR_IR)) + if (!(__kvmppc_get_msr_hv(vcpu) & MSR_IR)) vsid = vcpu->kvm->arch.vrma_slb_v; else vsid = vcpu->arch.fault_gpa; @@ -1895,7 +1895,7 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu, kvmppc_dump_regs(vcpu); printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", vcpu->arch.trap, kvmppc_get_pc(vcpu), - vcpu->arch.shregs.msr); + __kvmppc_get_msr_hv(vcpu)); run->hw.hardware_exit_reason = vcpu->arch.trap; r = RESUME_HOST; break; @@ -1919,11 +1919,11 @@ static int kvmppc_handle_nested_exit(struct kvm_vcpu *vcpu) * That can happen due to a bug, or due to a machine check * occurring at just the wrong time. */ - if (vcpu->arch.shregs.msr & MSR_HV) { + if (__kvmppc_get_msr_hv(vcpu) & MSR_HV) { pr_emerg("KVM trap in HV mode while nested!\n"); pr_emerg("trap=0x%x | pc=0x%lx | msr=0x%llx\n", vcpu->arch.trap, kvmppc_get_pc(vcpu), - vcpu->arch.shregs.msr); + __kvmppc_get_msr_hv(vcpu)); kvmppc_dump_regs(vcpu); return RESUME_HOST; } @@ -1980,7 +1980,7 @@ static int kvmppc_handle_nested_exit(struct kvm_vcpu *vcpu) vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); vcpu->arch.fault_dsisr = kvmppc_get_msr(vcpu) & DSISR_SRR1_MATCH_64S; - if (vcpu->arch.shregs.msr & HSRR1_HISI_WRITE) + if (__kvmppc_get_msr_hv(vcpu) & HSRR1_HISI_WRITE) vcpu->arch.fault_dsisr |= DSISR_ISSTORE; srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); r = kvmhv_nested_page_fault(vcpu); @@ -2940,7 +2940,7 @@ static int kvmppc_core_vcpu_create_hv(struct kvm_vcpu *vcpu) spin_lock_init(&vcpu->arch.vpa_update_lock); spin_lock_init(&vcpu->arch.tbacct_lock); vcpu->arch.busy_preempt = TB_NIL; - vcpu->arch.shregs.msr = MSR_ME; + __kvmppc_set_msr_hv(vcpu, MSR_ME); vcpu->arch.intr_msr = MSR_SF | MSR_ME; /* @@ -4188,7 +4188,7 @@ static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit, __this_cpu_write(cpu_in_guest, NULL); if (trap == BOOK3S_INTERRUPT_SYSCALL && - !(vcpu->arch.shregs.msr & MSR_PR)) { + !(__kvmppc_get_msr_hv(vcpu) & MSR_PR)) { unsigned long req = kvmppc_get_gpr(vcpu, 3); /* @@ -4667,7 +4667,7 @@ int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, u64 time_limit, if (!nested) { kvmppc_core_prepare_to_enter(vcpu); - if (vcpu->arch.shregs.msr & MSR_EE) { + if (__kvmppc_get_msr_hv(vcpu) & MSR_EE) { if (xive_interrupt_pending(vcpu)) kvmppc_inject_interrupt_hv(vcpu, BOOK3S_INTERRUPT_EXTERNAL, 0); @@ -4880,7 +4880,7 @@ static int kvmppc_vcpu_run_hv(struct kvm_vcpu *vcpu) if (run->exit_reason == KVM_EXIT_PAPR_HCALL) { accumulate_time(vcpu, &vcpu->arch.hcall); - if (WARN_ON_ONCE(vcpu->arch.shregs.msr & MSR_PR)) { + if (WARN_ON_ONCE(__kvmppc_get_msr_hv(vcpu) & MSR_PR)) { /* * These should have been caught reflected * into the guest by now. Final sanity check: |