From: Pierre Morel <pmorel@linux.ibm.com>
To: Matthew Rosato <mjrosato@linux.ibm.com>, linux-s390@vger.kernel.org
Cc: alex.williamson@redhat.com, cohuck@redhat.com,
schnelle@linux.ibm.com, farman@linux.ibm.com,
borntraeger@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com,
gerald.schaefer@linux.ibm.com, agordeev@linux.ibm.com,
frankja@linux.ibm.com, david@redhat.com, imbrenda@linux.ibm.com,
vneethv@linux.ibm.com, oberpar@linux.ibm.com,
freude@linux.ibm.com, thuth@redhat.com, pasic@linux.ibm.com,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 18/30] KVM: s390: mechanism to enable guest zPCI Interpretation
Date: Mon, 14 Feb 2022 14:06:40 +0100 [thread overview]
Message-ID: <0fce8189-8a02-16d2-6f37-7e435c6b8024@linux.ibm.com> (raw)
In-Reply-To: <20220204211536.321475-19-mjrosato@linux.ibm.com>
On 2/4/22 22:15, Matthew Rosato wrote:
> The guest must have access to certain facilities in order to allow
> interpretive execution of zPCI instructions and adapter event
> notifications. However, there are some cases where a guest might
> disable interpretation -- provide a mechanism via which we can defer
> enabling the associated zPCI interpretation facilities until the guest
> indicates it wishes to use them.
>
> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Didn't you forget my ACK?
Acked-by: Pierre Morel <pmorel@linux.ibm.com>
> ---
> arch/s390/include/asm/kvm_host.h | 4 ++++
> arch/s390/kvm/kvm-s390.c | 40 ++++++++++++++++++++++++++++++++
> arch/s390/kvm/kvm-s390.h | 10 ++++++++
> 3 files changed, 54 insertions(+)
>
> diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
> index b468d3a2215e..bf61ab05f98c 100644
> --- a/arch/s390/include/asm/kvm_host.h
> +++ b/arch/s390/include/asm/kvm_host.h
> @@ -252,7 +252,10 @@ struct kvm_s390_sie_block {
> #define ECB2_IEP 0x20
> #define ECB2_PFMFI 0x08
> #define ECB2_ESCA 0x04
> +#define ECB2_ZPCI_LSI 0x02
> __u8 ecb2; /* 0x0062 */
> +#define ECB3_AISI 0x20
> +#define ECB3_AISII 0x10
> #define ECB3_DEA 0x08
> #define ECB3_AES 0x04
> #define ECB3_RI 0x01
> @@ -938,6 +941,7 @@ struct kvm_arch{
> int use_cmma;
> int use_pfmfi;
> int use_skf;
> + int use_zpci_interp;
> int user_cpu_state_ctrl;
> int user_sigp;
> int user_stsi;
> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
> index 24837d6050dc..208b09d08385 100644
> --- a/arch/s390/kvm/kvm-s390.c
> +++ b/arch/s390/kvm/kvm-s390.c
> @@ -1029,6 +1029,44 @@ static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr)
> return 0;
> }
>
> +static void kvm_s390_vcpu_pci_setup(struct kvm_vcpu *vcpu)
> +{
> + /* Only set the ECB bits after guest requests zPCI interpretation */
> + if (!vcpu->kvm->arch.use_zpci_interp)
> + return;
> +
> + vcpu->arch.sie_block->ecb2 |= ECB2_ZPCI_LSI;
> + vcpu->arch.sie_block->ecb3 |= ECB3_AISII + ECB3_AISI;
> +}
> +
> +void kvm_s390_vcpu_pci_enable_interp(struct kvm *kvm)
> +{
> + struct kvm_vcpu *vcpu;
> + unsigned long i;
> +
> + /*
> + * If host is configured for PCI and the necessary facilities are
> + * available, turn on interpretation for the life of this guest
> + */
> + if (!IS_ENABLED(CONFIG_VFIO_PCI_ZDEV) || !sclp.has_zpci_lsi ||
> + !sclp.has_aisii || !sclp.has_aeni || !sclp.has_aisi)
> + return;
> +
> + mutex_lock(&kvm->lock);
> +
> + kvm->arch.use_zpci_interp = 1;
> +
> + kvm_s390_vcpu_block_all(kvm);
> +
> + kvm_for_each_vcpu(i, vcpu, kvm) {
> + kvm_s390_vcpu_pci_setup(vcpu);
> + kvm_s390_sync_request(KVM_REQ_VSIE_RESTART, vcpu);
> + }
> +
> + kvm_s390_vcpu_unblock_all(kvm);
> + mutex_unlock(&kvm->lock);
> +}
> +
> static void kvm_s390_sync_request_broadcast(struct kvm *kvm, int req)
> {
> unsigned long cx;
> @@ -3236,6 +3274,8 @@ static int kvm_s390_vcpu_setup(struct kvm_vcpu *vcpu)
>
> kvm_s390_vcpu_crypto_setup(vcpu);
>
> + kvm_s390_vcpu_pci_setup(vcpu);
> +
> mutex_lock(&vcpu->kvm->lock);
> if (kvm_s390_pv_is_protected(vcpu->kvm)) {
> rc = kvm_s390_pv_create_cpu(vcpu, &uvrc, &uvrrc);
> diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h
> index 098831e815e6..14bb2539f837 100644
> --- a/arch/s390/kvm/kvm-s390.h
> +++ b/arch/s390/kvm/kvm-s390.h
> @@ -496,6 +496,16 @@ void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
> */
> void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm);
>
> +/**
> + * kvm_s390_vcpu_pci_enable_interp
> + *
> + * Set the associated PCI attributes for each vcpu to allow for zPCI Load/Store
> + * interpretation as well as adapter interruption forwarding.
> + *
> + * @kvm: the KVM guest
> + */
> +void kvm_s390_vcpu_pci_enable_interp(struct kvm *kvm);
> +
> /**
> * diag9c_forwarding_hz
> *
>
--
Pierre Morel
IBM Lab Boeblingen
next prev parent reply other threads:[~2022-02-14 13:04 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-04 21:15 [PATCH v3 00/30] KVM: s390: enable zPCI for interpretive execution Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 01/30] s390/sclp: detect the zPCI load/store interpretation facility Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 02/30] s390/sclp: detect the AISII facility Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 03/30] s390/sclp: detect the AENI facility Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 04/30] s390/sclp: detect the AISI facility Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 05/30] s390/airq: pass more TPI info to airq handlers Matthew Rosato
2022-02-07 8:28 ` Cornelia Huck
2022-02-04 21:15 ` [PATCH v3 06/30] s390/airq: allow for airq structure that uses an input vector Matthew Rosato
2022-02-07 8:29 ` Cornelia Huck
2022-02-07 8:42 ` Claudio Imbrenda
2022-02-04 21:15 ` [PATCH v3 07/30] s390/pci: externalize the SIC operation controls and routine Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 08/30] s390/pci: stash associated GISA designation Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 09/30] s390/pci: export some routines related to RPCIT processing Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 10/30] s390/pci: stash dtsm and maxstbl Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 11/30] s390/pci: add helper function to find device by handle Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 12/30] s390/pci: get SHM information from list pci Matthew Rosato
2022-02-07 10:08 ` Pierre Morel
2022-02-04 21:15 ` [PATCH v3 13/30] s390/pci: return status from zpci_refresh_trans Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 14/30] vfio/pci: re-introduce CONFIG_VFIO_PCI_ZDEV Matthew Rosato
2022-02-07 8:35 ` Cornelia Huck
2022-02-07 15:43 ` Matthew Rosato
2022-02-07 17:59 ` Cornelia Huck
2022-02-07 20:09 ` Matthew Rosato
2022-02-10 10:07 ` Cornelia Huck
2022-02-04 21:15 ` [PATCH v3 15/30] KVM: s390: pci: add basic kvm_zdev structure Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 16/30] KVM: s390: pci: do initial setup for AEN interpretation Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 17/30] KVM: s390: pci: enable host forwarding of Adapter Event Notifications Matthew Rosato
2022-02-14 12:59 ` Pierre Morel
2022-02-14 20:35 ` Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 18/30] KVM: s390: mechanism to enable guest zPCI Interpretation Matthew Rosato
2022-02-14 13:06 ` Pierre Morel [this message]
2022-02-04 21:15 ` [PATCH v3 19/30] KVM: s390: pci: provide routines for enabling/disabling interpretation Matthew Rosato
2022-02-14 13:22 ` Pierre Morel
2022-02-04 21:15 ` [PATCH v3 20/30] KVM: s390: pci: provide routines for enabling/disabling interrupt forwarding Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 21/30] KVM: s390: pci: provide routines for enabling/disabling IOAT assist Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 22/30] KVM: s390: pci: handle refresh of PCI translations Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 23/30] KVM: s390: intercept the rpcit instruction Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 24/30] vfio-pci/zdev: wire up group notifier Matthew Rosato
2022-02-08 17:43 ` Alex Williamson
2022-02-08 18:51 ` Jason Gunthorpe
2022-02-08 19:26 ` Alex Williamson
2022-02-08 19:51 ` Jason Gunthorpe
2022-02-08 20:33 ` Matthew Rosato
2022-02-08 20:40 ` Jason Gunthorpe
2022-02-08 21:37 ` Matthew Rosato
2022-02-10 11:15 ` Niklas Schnelle
2022-02-10 13:01 ` Jason Gunthorpe
2022-02-10 14:06 ` Niklas Schnelle
2022-02-10 15:23 ` Jason Gunthorpe
2022-02-10 18:59 ` Matthew Rosato
2022-02-10 23:45 ` Jason Gunthorpe
2022-02-04 21:15 ` [PATCH v3 25/30] vfio-pci/zdev: wire up zPCI interpretive execution support Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 26/30] vfio-pci/zdev: wire up zPCI adapter interrupt forwarding support Matthew Rosato
2022-02-07 16:38 ` Pierre Morel
2022-02-04 21:15 ` [PATCH v3 27/30] vfio-pci/zdev: wire up zPCI IOAT assist support Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 28/30] vfio-pci/zdev: add DTSM to clp group capability Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 29/30] KVM: s390: introduce CPU feature for zPCI Interpretation Matthew Rosato
2022-02-07 16:36 ` Pierre Morel
2022-02-04 21:15 ` [PATCH v3 30/30] MAINTAINERS: additional files related kvm s390 pci passthrough Matthew Rosato
2022-02-07 13:04 ` Christian Borntraeger
2022-02-07 15:44 ` Matthew Rosato
2022-02-04 21:33 ` [PATCH v3 00/30] KVM: s390: enable zPCI for interpretive execution Matthew Rosato
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