From: Fabiano Rosas <farosas@linux.ibm.com>
To: Nicholas Piggin <npiggin@gmail.com>, kvm-ppc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org, Nicholas Piggin <npiggin@gmail.com>
Subject: Re: [PATCH v2 34/37] KVM: PPC: Book3S HV: add virtual mode handlers for HPT hcalls and page faults
Date: Wed, 03 Mar 2021 17:09:57 -0300 [thread overview]
Message-ID: <87im68vw16.fsf@linux.ibm.com> (raw)
In-Reply-To: <20210225134652.2127648-35-npiggin@gmail.com>
Nicholas Piggin <npiggin@gmail.com> writes:
> In order to support hash guests in the P9 path (which does not do real
> mode hcalls or page fault handling), these real-mode hash specific
> interrupts need to be implemented in virt mode.
>
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> ---
> arch/powerpc/kvm/book3s_hv.c | 118 +++++++++++++++++++++++++++++++++--
> 1 file changed, 113 insertions(+), 5 deletions(-)
>
> diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
> index 9d2fa21201c1..1bbc46f2cfbf 100644
> --- a/arch/powerpc/kvm/book3s_hv.c
> +++ b/arch/powerpc/kvm/book3s_hv.c
> @@ -935,6 +935,52 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
> return RESUME_HOST;
>
> switch (req) {
> + case H_REMOVE:
> + ret = kvmppc_h_remove(vcpu, kvmppc_get_gpr(vcpu, 4),
> + kvmppc_get_gpr(vcpu, 5),
> + kvmppc_get_gpr(vcpu, 6));
> + if (ret == H_TOO_HARD)
> + return RESUME_HOST;
> + break;
> + case H_ENTER:
> + ret = kvmppc_h_enter(vcpu, kvmppc_get_gpr(vcpu, 4),
> + kvmppc_get_gpr(vcpu, 5),
> + kvmppc_get_gpr(vcpu, 6),
> + kvmppc_get_gpr(vcpu, 7));
> + if (ret == H_TOO_HARD)
> + return RESUME_HOST;
> + break;
> + case H_READ:
> + ret = kvmppc_h_read(vcpu, kvmppc_get_gpr(vcpu, 4),
> + kvmppc_get_gpr(vcpu, 5));
> + if (ret == H_TOO_HARD)
> + return RESUME_HOST;
> + break;
> + case H_CLEAR_MOD:
> + ret = kvmppc_h_clear_mod(vcpu, kvmppc_get_gpr(vcpu, 4),
> + kvmppc_get_gpr(vcpu, 5));
> + if (ret == H_TOO_HARD)
> + return RESUME_HOST;
> + break;
> + case H_CLEAR_REF:
> + ret = kvmppc_h_clear_ref(vcpu, kvmppc_get_gpr(vcpu, 4),
> + kvmppc_get_gpr(vcpu, 5));
> + if (ret == H_TOO_HARD)
> + return RESUME_HOST;
> + break;
> + case H_PROTECT:
> + ret = kvmppc_h_protect(vcpu, kvmppc_get_gpr(vcpu, 4),
> + kvmppc_get_gpr(vcpu, 5),
> + kvmppc_get_gpr(vcpu, 6));
> + if (ret == H_TOO_HARD)
> + return RESUME_HOST;
> + break;
> + case H_BULK_REMOVE:
> + ret = kvmppc_h_bulk_remove(vcpu);
> + if (ret == H_TOO_HARD)
> + return RESUME_HOST;
> + break;
> +
Some of these symbols need to be exported.
ERROR: modpost: "kvmppc_h_bulk_remove" [arch/powerpc/kvm/kvm-hv.ko] undefined!
ERROR: modpost: "kvmppc_h_clear_mod" [arch/powerpc/kvm/kvm-hv.ko] undefined!
ERROR: modpost: "kvmppc_xive_xics_hcall" [arch/powerpc/kvm/kvm-hv.ko] undefined!
ERROR: modpost: "kvmppc_h_remove" [arch/powerpc/kvm/kvm-hv.ko] undefined!
ERROR: modpost: "decrementers_next_tb" [arch/powerpc/kvm/kvm-hv.ko] undefined!
ERROR: modpost: "kvmppc_hpte_hv_fault" [arch/powerpc/kvm/kvm-hv.ko] undefined!
ERROR: modpost: "kvmppc_h_protect" [arch/powerpc/kvm/kvm-hv.ko] undefined!
ERROR: modpost: "kvmppc_h_enter" [arch/powerpc/kvm/kvm-hv.ko] undefined!
ERROR: modpost: "kvmppc_h_clear_ref" [arch/powerpc/kvm/kvm-hv.ko] undefined!
ERROR: modpost: "kvmppc_h_read" [arch/powerpc/kvm/kvm-hv.ko] undefined!
> case H_CEDE:
> break;
> case H_PROD:
> @@ -1134,6 +1180,7 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
> default:
> return RESUME_HOST;
> }
> + WARN_ON_ONCE(ret == H_TOO_HARD);
> kvmppc_set_gpr(vcpu, 3, ret);
> vcpu->arch.hcall_needed = 0;
> return RESUME_GUEST;
> @@ -1420,19 +1467,80 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu,
> * host page has been paged out. Any other HDSI/HISI interrupts
> * have been handled already.
> */
> - case BOOK3S_INTERRUPT_H_DATA_STORAGE:
> - r = RESUME_PAGE_FAULT;
> - if (vcpu->arch.fault_dsisr == HDSISR_CANARY)
> + case BOOK3S_INTERRUPT_H_DATA_STORAGE: {
> + unsigned long vsid;
> + long err;
> +
> + if (vcpu->arch.fault_dsisr == HDSISR_CANARY) {
> r = RESUME_GUEST; /* Just retry if it's the canary */
> + break;
> + }
> +
> + if (kvm_is_radix(vcpu->kvm)) {
> + r = RESUME_PAGE_FAULT;
> + break;
> + }
> +
> + if (!(vcpu->arch.fault_dsisr & (DSISR_NOHPTE | DSISR_PROTFAULT))) {
> + kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
> + r = RESUME_GUEST;
> + break;
> + }
> + if (!(vcpu->arch.shregs.msr & MSR_DR)) {
> + vsid = vcpu->kvm->arch.vrma_slb_v;
> + } else {
> + vsid = vcpu->arch.fault_gpa;
> + }
> + err = kvmppc_hpte_hv_fault(vcpu, vcpu->arch.fault_dar,
> + vsid, vcpu->arch.fault_dsisr, true);
> + if (err == 0) {
> + r = RESUME_GUEST;
> + } else if (err == -1 || err == -2) {
> + r = RESUME_PAGE_FAULT;
> + } else {
> + kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dar, err);
> + r = RESUME_GUEST;
> + }
> break;
> - case BOOK3S_INTERRUPT_H_INST_STORAGE:
> + }
> + case BOOK3S_INTERRUPT_H_INST_STORAGE: {
> + unsigned long vsid;
> + long err;
> +
> vcpu->arch.fault_dar = kvmppc_get_pc(vcpu);
> vcpu->arch.fault_dsisr = vcpu->arch.shregs.msr &
> DSISR_SRR1_MATCH_64S;
> if (vcpu->arch.shregs.msr & HSRR1_HISI_WRITE)
> vcpu->arch.fault_dsisr |= DSISR_ISSTORE;
> - r = RESUME_PAGE_FAULT;
> + if (kvm_is_radix(vcpu->kvm)) {
> + r = RESUME_PAGE_FAULT;
> + break;
> + }
> +
> + if (!(vcpu->arch.fault_dsisr & SRR1_ISI_NOPT)) {
> + /* XXX: clear DSISR_ISSTORE? */
> + kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_dsisr);
> + r = RESUME_GUEST;
> + break;
> + }
> + if (!(vcpu->arch.shregs.msr & MSR_DR)) {
> + vsid = vcpu->kvm->arch.vrma_slb_v;
> + } else {
> + vsid = vcpu->arch.fault_gpa;
> + }
> + err = kvmppc_hpte_hv_fault(vcpu, vcpu->arch.fault_dar,
> + vsid, vcpu->arch.fault_dsisr, false);
> + if (err == 0) {
> + r = RESUME_GUEST;
> + } else if (err == -1) {
> + r = RESUME_PAGE_FAULT;
> + } else {
> + kvmppc_core_queue_inst_storage(vcpu, err);
> + r = RESUME_GUEST;
> + }
> break;
> + }
> +
> /*
> * This occurs if the guest executes an illegal instruction.
> * If the guest debug is disabled, generate a program interrupt
next prev parent reply other threads:[~2021-03-03 20:10 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-25 13:46 [PATCH v2 00/37] KVM: PPC: Book3S: C-ify the P9 entry/exit code Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 01/37] KVM: PPC: Book3S 64: remove unused kvmppc_h_protect argument Nicholas Piggin
2021-02-26 5:01 ` Daniel Axtens
2021-02-26 23:50 ` Nicholas Piggin
2021-03-05 4:45 ` Daniel Axtens
2021-02-25 13:46 ` [PATCH v2 02/37] KVM: PPC: Book3S HV: Fix CONFIG_SPAPR_TCE_IOMMU=n default hcalls Nicholas Piggin
2021-02-26 5:21 ` Daniel Axtens
2021-02-25 13:46 ` [PATCH v2 03/37] powerpc/64s: Remove KVM handler support from CBE_RAS interrupts Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 04/37] powerpc/64s: remove KVM SKIP test from instruction breakpoint handler Nicholas Piggin
2021-02-26 5:44 ` Daniel Axtens
2021-02-26 23:51 ` Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 05/37] KVM: PPC: Book3S HV: Ensure MSR[ME] is always set in guest MSR Nicholas Piggin
2021-02-26 6:06 ` Daniel Axtens
2021-02-26 23:55 ` Nicholas Piggin
2021-03-05 4:50 ` Daniel Axtens
2021-02-25 13:46 ` [PATCH v2 06/37] KVM: PPC: Book3S 64: move KVM interrupt entry to a common entry point Nicholas Piggin
2021-03-05 5:03 ` Daniel Axtens
2021-02-25 13:46 ` [PATCH v2 07/37] KVM: PPC: Book3S 64: Move GUEST_MODE_SKIP test into KVM Nicholas Piggin
2021-03-05 5:54 ` Daniel Axtens
2021-02-25 13:46 ` [PATCH v2 08/37] KVM: PPC: Book3S 64: add hcall interrupt handler Nicholas Piggin
2021-03-05 6:03 ` Daniel Axtens
2021-02-25 13:46 ` [PATCH v2 09/37] KVM: PPC: Book3S 64: Move hcall early register setup to KVM Nicholas Piggin
2021-03-05 6:48 ` Daniel Axtens
2021-02-25 13:46 ` [PATCH v2 10/37] KVM: PPC: Book3S 64: Move interrupt " Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 11/37] KVM: PPC: Book3S 64: move bad_host_intr check to HV handler Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 12/37] KVM: PPC: Book3S 64: Minimise hcall handler calling convention differences Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 13/37] KVM: PPC: Book3S HV P9: Move radix MMU switching instructions together Nicholas Piggin
2021-02-26 15:56 ` Fabiano Rosas
2021-02-26 23:57 ` Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 14/37] KVM: PPC: Book3S HV P9: implement kvmppc_xive_pull_vcpu in C Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 15/37] KVM: PPC: Book3S HV P9: Move xive vcpu context management into kvmhv_p9_guest_entry Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 16/37] KVM: PPC: Book3S HV P9: Stop handling hcalls in real-mode in the P9 path Nicholas Piggin
2021-02-25 14:51 ` Cédric Le Goater
2021-02-26 23:59 ` Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 17/37] KVM: PPC: Book3S HV P9: Move setting HDEC after switching to guest LPCR Nicholas Piggin
2021-02-26 16:38 ` Fabiano Rosas
2021-02-26 23:59 ` Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 18/37] KVM: PPC: Book3S HV P9: Use large decrementer for HDEC Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 19/37] KVM: PPC: Book3S HV P9: Use host timer accounting to avoid decrementer read Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 20/37] KVM: PPC: Book3S HV P9: Reduce mftb per guest entry/exit Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 21/37] powerpc: add set_dec_or_work API for safely updating decrementer Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 22/37] KVM: PPC: Book3S HV P9: Reduce irq_work vs guest decrementer races Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 23/37] KVM: PPC: Book3S HV P9: Implement the rest of the P9 path in C Nicholas Piggin
2021-02-26 22:37 ` Fabiano Rosas
2021-02-27 0:21 ` Nicholas Piggin
2021-02-27 0:55 ` Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 24/37] KVM: PPC: Book3S HV P9: inline kvmhv_load_hv_regs_and_go into __kvmhv_vcpu_entry_p9 Nicholas Piggin
2021-03-02 13:48 ` Fabiano Rosas
2021-02-25 13:46 ` [PATCH v2 25/37] KVM: PPC: Book3S HV P9: Read machine check registers while MSR[RI] is 0 Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 26/37] KVM: PPC: Book3S HV P9: Improve exit timing accounting coverage Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 27/37] KVM: PPC: Book3S HV P9: Move SPR loading after expiry time check Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 28/37] KVM: PPC: Book3S HV P9: Add helpers for OS SPR handling Nicholas Piggin
2021-03-02 15:04 ` Fabiano Rosas
2021-03-04 11:02 ` Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 29/37] KVM: PPC: Book3S HV P9: Switch to guest MMU context as late as possible Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 30/37] KVM: PPC: Book3S HV: Implement radix prefetch workaround by disabling MMU Nicholas Piggin
2021-03-02 21:21 ` Fabiano Rosas
2021-03-04 11:04 ` Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 31/37] KVM: PPC: Book3S HV: Remove support for dependent threads mode on P9 Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 32/37] KVM: PPC: Book3S HV: Remove radix guest support from P7/8 path Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 33/37] KVM: PPC: Book3S HV: small pseries_do_hcall cleanup Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 34/37] KVM: PPC: Book3S HV: add virtual mode handlers for HPT hcalls and page faults Nicholas Piggin
2021-03-03 20:09 ` Fabiano Rosas [this message]
2021-03-04 11:05 ` Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 35/37] KVM: PPC: Book3S HV P9: implement hash guest support Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 36/37] KVM: PPC: Book3S HV P9: implement hash host / " Nicholas Piggin
2021-02-25 13:46 ` [PATCH v2 37/37] KVM: PPC: Book3S HV: remove POWER9 support from P7/8 paths Nicholas Piggin
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