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 v2 13/30] s390/pci: return status from zpci_refresh_trans
Date: Wed, 19 Jan 2022 19:13:55 +0100 [thread overview]
Message-ID: <2fad3da6-987a-ae62-9da2-f9184b0c91cb@linux.ibm.com> (raw)
In-Reply-To: <20220114203145.242984-14-mjrosato@linux.ibm.com>
On 1/14/22 21:31, Matthew Rosato wrote:
> Current callers of zpci_refresh_trans don't need to interrogate the status
> returned from the underlying instructions. However, a subsequent patch
> will add a KVM caller that needs this information. Add a new argument to
> zpci_refresh_trans to pass the address of a status byte and update
> existing call sites to provide it.
>
> Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
> ---
> arch/s390/include/asm/pci_insn.h | 2 +-
> arch/s390/pci/pci_dma.c | 6 ++++--
> arch/s390/pci/pci_insn.c | 10 +++++-----
> drivers/iommu/s390-iommu.c | 4 +++-
> 4 files changed, 13 insertions(+), 9 deletions(-)
>
> diff --git a/arch/s390/include/asm/pci_insn.h b/arch/s390/include/asm/pci_insn.h
> index 5331082fa516..32759c407b8f 100644
> --- a/arch/s390/include/asm/pci_insn.h
> +++ b/arch/s390/include/asm/pci_insn.h
> @@ -135,7 +135,7 @@ union zpci_sic_iib {
> DECLARE_STATIC_KEY_FALSE(have_mio);
>
> u8 zpci_mod_fc(u64 req, struct zpci_fib *fib, u8 *status);
> -int zpci_refresh_trans(u64 fn, u64 addr, u64 range);
> +int zpci_refresh_trans(u64 fn, u64 addr, u64 range, u8 *status);
> int __zpci_load(u64 *data, u64 req, u64 offset);
> int zpci_load(u64 *data, const volatile void __iomem *addr, unsigned long len);
> int __zpci_store(u64 data, u64 req, u64 offset);
> diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c
> index a81de48d5ea7..b0a2380bcad8 100644
> --- a/arch/s390/pci/pci_dma.c
> +++ b/arch/s390/pci/pci_dma.c
> @@ -23,8 +23,9 @@ static u32 s390_iommu_aperture_factor = 1;
>
> static int zpci_refresh_global(struct zpci_dev *zdev)
> {
> + u8 status;
> return zpci_refresh_trans((u64) zdev->fh << 32, zdev->start_dma,
> - zdev->iommu_pages * PAGE_SIZE);
> + zdev->iommu_pages * PAGE_SIZE, &status);
> }
>
> unsigned long *dma_alloc_cpu_table(void)
> @@ -183,6 +184,7 @@ static int __dma_purge_tlb(struct zpci_dev *zdev, dma_addr_t dma_addr,
> size_t size, int flags)
> {
> unsigned long irqflags;
> + u8 status;
> int ret;
>
> /*
> @@ -201,7 +203,7 @@ static int __dma_purge_tlb(struct zpci_dev *zdev, dma_addr_t dma_addr,
> }
>
> ret = zpci_refresh_trans((u64) zdev->fh << 32, dma_addr,
> - PAGE_ALIGN(size));
> + PAGE_ALIGN(size), &status);
> if (ret == -ENOMEM && !s390_iommu_strict) {
> /* enable the hypervisor to free some resources */
> if (zpci_refresh_global(zdev))
> diff --git a/arch/s390/pci/pci_insn.c b/arch/s390/pci/pci_insn.c
> index 0509554301c7..ca6399d52767 100644
> --- a/arch/s390/pci/pci_insn.c
> +++ b/arch/s390/pci/pci_insn.c
> @@ -77,20 +77,20 @@ static inline u8 __rpcit(u64 fn, u64 addr, u64 range, u8 *status)
> return cc;
> }
>
> -int zpci_refresh_trans(u64 fn, u64 addr, u64 range)
> +int zpci_refresh_trans(u64 fn, u64 addr, u64 range, u8 *status)
> {
> - u8 cc, status;
> + u8 cc;
>
> do {
> - cc = __rpcit(fn, addr, range, &status);
> + cc = __rpcit(fn, addr, range, status);
> if (cc == 2)
> udelay(ZPCI_INSN_BUSY_DELAY);
> } while (cc == 2);
>
> if (cc)
> - zpci_err_insn(cc, status, addr, range);
> + zpci_err_insn(cc, *status, addr, range);
>
> - if (cc == 1 && (status == 4 || status == 16))
> + if (cc == 1 && (*status == 4 || *status == 16))
> return -ENOMEM;
>
> return (cc) ? -EIO : 0;
> diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c
> index 50860ebdd087..845bb99c183e 100644
> --- a/drivers/iommu/s390-iommu.c
> +++ b/drivers/iommu/s390-iommu.c
> @@ -214,6 +214,7 @@ static int s390_iommu_update_trans(struct s390_domain *s390_domain,
> unsigned long irq_flags, nr_pages, i;
> unsigned long *entry;
> int rc = 0;
> + u8 status;
>
> if (dma_addr < s390_domain->domain.geometry.aperture_start ||
> dma_addr + size > s390_domain->domain.geometry.aperture_end)
> @@ -238,7 +239,8 @@ static int s390_iommu_update_trans(struct s390_domain *s390_domain,
> spin_lock(&s390_domain->list_lock);
> list_for_each_entry(domain_device, &s390_domain->devices, list) {
> rc = zpci_refresh_trans((u64) domain_device->zdev->fh << 32,
> - start_dma_addr, nr_pages * PAGE_SIZE);
> + start_dma_addr, nr_pages * PAGE_SIZE,
> + &status);
> if (rc)
> break;
> }
>
--
Pierre Morel
IBM Lab Boeblingen
next prev parent reply other threads:[~2022-01-19 18:12 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-14 20:31 [PATCH v2 00/30] KVM: s390: enable zPCI for interpretive execution Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 01/30] s390/sclp: detect the zPCI load/store interpretation facility Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 02/30] s390/sclp: detect the AISII facility Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 03/30] s390/sclp: detect the AENI facility Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 04/30] s390/sclp: detect the AISI facility Matthew Rosato
2022-01-17 7:57 ` Thomas Huth
2022-01-14 20:31 ` [PATCH v2 05/30] s390/airq: pass more TPI info to airq handlers Matthew Rosato
2022-01-17 8:27 ` Thomas Huth
2022-01-14 20:31 ` [PATCH v2 06/30] s390/airq: allow for airq structure that uses an input vector Matthew Rosato
2022-01-17 12:29 ` Claudio Imbrenda
2022-01-18 18:52 ` Matthew Rosato
2022-01-18 9:50 ` Pierre Morel
2022-01-14 20:31 ` [PATCH v2 07/30] s390/pci: externalize the SIC operation controls and routine Matthew Rosato
2022-01-17 16:19 ` Niklas Schnelle
2022-01-26 10:07 ` Claudio Imbrenda
2022-01-27 9:57 ` Pierre Morel
2022-01-14 20:31 ` [PATCH v2 08/30] s390/pci: stash associated GISA designation Matthew Rosato
2022-01-24 14:08 ` Pierre Morel
2022-01-24 15:12 ` Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 09/30] s390/pci: export some routines related to RPCIT processing Matthew Rosato
2022-01-18 9:51 ` Pierre Morel
2022-01-14 20:31 ` [PATCH v2 10/30] s390/pci: stash dtsm and maxstbl Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 11/30] s390/pci: add helper function to find device by handle Matthew Rosato
2022-01-18 9:53 ` Pierre Morel
2022-01-14 20:31 ` [PATCH v2 12/30] s390/pci: get SHM information from list pci Matthew Rosato
2022-01-18 10:36 ` Pierre Morel
2022-01-26 10:13 ` Claudio Imbrenda
2022-01-27 13:41 ` Pierre Morel
2022-01-27 15:14 ` Matthew Rosato
2022-01-27 10:29 ` Niklas Schnelle
2022-01-14 20:31 ` [PATCH v2 13/30] s390/pci: return status from zpci_refresh_trans Matthew Rosato
2022-01-19 18:13 ` Pierre Morel [this message]
2022-01-26 10:45 ` Claudio Imbrenda
2022-01-27 10:30 ` Niklas Schnelle
2022-01-14 20:31 ` [PATCH v2 14/30] KVM: s390: pci: add basic kvm_zdev structure Matthew Rosato
2022-01-17 16:25 ` Pierre Morel
2022-01-18 17:32 ` Pierre Morel
2022-01-18 18:39 ` Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 15/30] KVM: s390: pci: do initial setup for AEN interpretation Matthew Rosato
2022-01-19 18:06 ` Pierre Morel
2022-01-19 20:19 ` Matthew Rosato
2022-01-25 12:23 ` Pierre Morel
2022-01-25 14:57 ` Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 16/30] KVM: s390: pci: enable host forwarding of Adapter Event Notifications Matthew Rosato
2022-01-17 17:38 ` Pierre Morel
2022-01-18 17:25 ` Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 17/30] KVM: s390: mechanism to enable guest zPCI Interpretation Matthew Rosato
2022-01-24 14:24 ` Pierre Morel
2022-01-24 15:28 ` Matthew Rosato
2022-01-24 17:15 ` Pierre Morel
2022-01-14 20:31 ` [PATCH v2 18/30] KVM: s390: pci: provide routines for enabling/disabling interpretation Matthew Rosato
2022-01-24 14:36 ` Pierre Morel
2022-01-24 15:14 ` Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 19/30] KVM: s390: pci: provide routines for enabling/disabling interrupt forwarding Matthew Rosato
2022-01-25 12:41 ` Pierre Morel
2022-01-25 15:44 ` Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 20/30] KVM: s390: pci: provide routines for enabling/disabling IOAT assist Matthew Rosato
2022-01-25 13:29 ` Pierre Morel
2022-01-25 14:47 ` Matthew Rosato
2022-01-26 8:30 ` Pierre Morel
2022-01-14 20:31 ` [PATCH v2 21/30] KVM: s390: pci: handle refresh of PCI translations Matthew Rosato
2022-01-19 9:29 ` Pierre Morel
2022-01-19 16:39 ` Matthew Rosato
2022-01-19 18:25 ` Pierre Morel
2022-01-19 20:02 ` Matthew Rosato
2022-01-20 9:47 ` Pierre Morel
2022-01-14 20:31 ` [PATCH v2 22/30] KVM: s390: intercept the rpcit instruction Matthew Rosato
2022-01-18 11:05 ` Pierre Morel
2022-01-18 17:27 ` Matthew Rosato
2022-01-18 17:54 ` Pierre Morel
2022-01-19 14:06 ` Pierre Morel
2022-01-14 20:31 ` [PATCH v2 23/30] vfio/pci: re-introduce CONFIG_VFIO_PCI_ZDEV Matthew Rosato
2022-01-18 17:20 ` Pierre Morel
2022-01-18 17:32 ` Matthew Rosato
2022-01-18 17:45 ` Pierre Morel
2022-01-18 18:05 ` Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 24/30] vfio-pci/zdev: wire up group notifier Matthew Rosato
2022-01-18 17:34 ` Pierre Morel
2022-01-18 18:37 ` Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 25/30] vfio-pci/zdev: wire up zPCI interpretive execution support Matthew Rosato
2022-01-25 13:01 ` Pierre Morel
2022-01-25 14:21 ` Matthew Rosato
2022-01-14 20:31 ` [PATCH v2 26/30] vfio-pci/zdev: wire up zPCI adapter interrupt forwarding support Matthew Rosato
2022-01-19 17:10 ` Pierre Morel
2022-01-19 17:20 ` Matthew Rosato
2022-01-25 12:36 ` Pierre Morel
2022-01-25 14:16 ` Matthew Rosato
2022-01-26 8:24 ` Pierre Morel
2022-01-14 20:31 ` [PATCH v2 27/30] vfio-pci/zdev: wire up zPCI IOAT assist support Matthew Rosato
2022-01-19 14:03 ` Pierre Morel
2022-01-14 20:31 ` [PATCH v2 28/30] vfio-pci/zdev: add DTSM to clp group capability Matthew Rosato
2022-01-19 13:48 ` Pierre Morel
2022-01-14 20:31 ` [PATCH v2 29/30] KVM: s390: introduce CPU feature for zPCI Interpretation Matthew Rosato
2022-01-19 13:39 ` Pierre Morel
2022-01-14 20:31 ` [PATCH v2 30/30] MAINTAINERS: additional files related kvm s390 pci passthrough Matthew Rosato
2022-01-14 20:49 ` [PATCH v2 00/30] KVM: s390: enable zPCI for interpretive execution Matthew Rosato
2022-01-19 18:10 ` Pierre Morel
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