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[Qemu-devel] [PATCH 2/2] gen_pcie_root_port: Add ACS (Access Control Services) capability

Knut Omang posted 2 patches 7 years ago
Maintainers: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, "Michael S. Tsirkin" <mst@redhat.com>
There is a newer version of this series
[Qemu-devel] [PATCH 2/2] gen_pcie_root_port: Add ACS (Access Control Services) capability
Posted by Knut Omang 7 years ago 
Claiming ACS support allows passthrough of an emulated device
(in a nested virt.setting) with VFIO without Alex Williamson's patch
for the pcie_acs_override kernel parameter.
A similar need appears on Windows with Hyper-V

Signed-off-by: Knut Omang <knut.omang@oracle.com>
---
 hw/pci-bridge/gen_pcie_root_port.c | 2 ++
 hw/pci-bridge/ioh3420.c            | 1 -
 hw/pci-bridge/pcie_root_port.c     | 3 +++
 include/hw/pci/pcie_port.h         | 1 +
 4 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/hw/pci-bridge/gen_pcie_root_port.c b/hw/pci-bridge/gen_pcie_root_port.c
index 9766edb..b5a5ecc 100644
--- a/hw/pci-bridge/gen_pcie_root_port.c
+++ b/hw/pci-bridge/gen_pcie_root_port.c
@@ -20,6 +20,7 @@
         OBJECT_CHECK(GenPCIERootPort, (obj), TYPE_GEN_PCIE_ROOT_PORT)
 
 #define GEN_PCIE_ROOT_PORT_AER_OFFSET           0x100
+#define GEN_PCIE_ROOT_PORT_ACS_OFFSET           0x148
 #define GEN_PCIE_ROOT_PORT_MSIX_NR_VECTOR       1
 
 typedef struct GenPCIERootPort {
@@ -149,6 +150,7 @@ static void gen_rp_dev_class_init(ObjectClass *klass, void *data)
     rpc->interrupts_init = gen_rp_interrupts_init;
     rpc->interrupts_uninit = gen_rp_interrupts_uninit;
     rpc->aer_offset = GEN_PCIE_ROOT_PORT_AER_OFFSET;
+    rpc->acs_offset = GEN_PCIE_ROOT_PORT_ACS_OFFSET;
 }
 
 static const TypeInfo gen_rp_dev_info = {
diff --git a/hw/pci-bridge/ioh3420.c b/hw/pci-bridge/ioh3420.c
index 81f2de6..2064939 100644
--- a/hw/pci-bridge/ioh3420.c
+++ b/hw/pci-bridge/ioh3420.c
@@ -71,7 +71,6 @@ static int ioh3420_interrupts_init(PCIDevice *d, Error **errp)
     if (rc < 0) {
         assert(rc == -ENOTSUP);
     }
-
     return rc;
 }
 
diff --git a/hw/pci-bridge/pcie_root_port.c b/hw/pci-bridge/pcie_root_port.c
index 34ad767..c33a493 100644
--- a/hw/pci-bridge/pcie_root_port.c
+++ b/hw/pci-bridge/pcie_root_port.c
@@ -106,6 +106,9 @@ static void rp_realize(PCIDevice *d, Error **errp)
     pcie_aer_root_init(d);
     rp_aer_vector_update(d);
 
+    if (rpc->acs_offset) {
+        pcie_acs_init(d, rpc->acs_offset, 0);
+    }
     return;
 
 err:
diff --git a/include/hw/pci/pcie_port.h b/include/hw/pci/pcie_port.h
index df242a0..09586f4 100644
--- a/include/hw/pci/pcie_port.h
+++ b/include/hw/pci/pcie_port.h
@@ -78,6 +78,7 @@ typedef struct PCIERootPortClass {
     int exp_offset;
     int aer_offset;
     int ssvid_offset;
+    int acs_offset;    /* If nonzero, optional ACS capability offset */
     int ssid;
 } PCIERootPortClass;
 
-- 
git-series 0.9.1
Re: [Qemu-devel] [PATCH 2/2] gen_pcie_root_port: Add ACS (Access Control Services) capability
Posted by Alex Williamson 7 years ago 
On Wed, 23 Jan 2019 19:28:00 +0100
Knut Omang <knut.omang@oracle.com> wrote:

> Claiming ACS support allows passthrough of an emulated device
> (in a nested virt.setting) with VFIO without Alex Williamson's patch
> for the pcie_acs_override kernel parameter.
> A similar need appears on Windows with Hyper-V
> 
> Signed-off-by: Knut Omang <knut.omang@oracle.com>
> ---
>  hw/pci-bridge/gen_pcie_root_port.c | 2 ++
>  hw/pci-bridge/ioh3420.c            | 1 -
>  hw/pci-bridge/pcie_root_port.c     | 3 +++
>  include/hw/pci/pcie_port.h         | 1 +
>  4 files changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/pci-bridge/gen_pcie_root_port.c b/hw/pci-bridge/gen_pcie_root_port.c
> index 9766edb..b5a5ecc 100644
> --- a/hw/pci-bridge/gen_pcie_root_port.c
> +++ b/hw/pci-bridge/gen_pcie_root_port.c
> @@ -20,6 +20,7 @@
>          OBJECT_CHECK(GenPCIERootPort, (obj), TYPE_GEN_PCIE_ROOT_PORT)
>  
>  #define GEN_PCIE_ROOT_PORT_AER_OFFSET           0x100
> +#define GEN_PCIE_ROOT_PORT_ACS_OFFSET           0x148

Perhaps (GEN_PCIE_ROOT_PORT_AER_OFFSET + PCI_ERR_SIZEOF)

>  #define GEN_PCIE_ROOT_PORT_MSIX_NR_VECTOR       1
>  
>  typedef struct GenPCIERootPort {
> @@ -149,6 +150,7 @@ static void gen_rp_dev_class_init(ObjectClass *klass, void *data)
>      rpc->interrupts_init = gen_rp_interrupts_init;
>      rpc->interrupts_uninit = gen_rp_interrupts_uninit;
>      rpc->aer_offset = GEN_PCIE_ROOT_PORT_AER_OFFSET;
> +    rpc->acs_offset = GEN_PCIE_ROOT_PORT_ACS_OFFSET;
>  }
>  
>  static const TypeInfo gen_rp_dev_info = {
> diff --git a/hw/pci-bridge/ioh3420.c b/hw/pci-bridge/ioh3420.c
> index 81f2de6..2064939 100644
> --- a/hw/pci-bridge/ioh3420.c
> +++ b/hw/pci-bridge/ioh3420.c
> @@ -71,7 +71,6 @@ static int ioh3420_interrupts_init(PCIDevice *d, Error **errp)
>      if (rc < 0) {
>          assert(rc == -ENOTSUP);
>      }
> -

Unrelated

>      return rc;
>  }
>  
> diff --git a/hw/pci-bridge/pcie_root_port.c b/hw/pci-bridge/pcie_root_port.c
> index 34ad767..c33a493 100644
> --- a/hw/pci-bridge/pcie_root_port.c
> +++ b/hw/pci-bridge/pcie_root_port.c
> @@ -106,6 +106,9 @@ static void rp_realize(PCIDevice *d, Error **errp)
>      pcie_aer_root_init(d);
>      rp_aer_vector_update(d);
>  
> +    if (rpc->acs_offset) {
> +        pcie_acs_init(d, rpc->acs_offset, 0);
> +    }
>      return;
>  
>  err:
> diff --git a/include/hw/pci/pcie_port.h b/include/hw/pci/pcie_port.h
> index df242a0..09586f4 100644
> --- a/include/hw/pci/pcie_port.h
> +++ b/include/hw/pci/pcie_port.h
> @@ -78,6 +78,7 @@ typedef struct PCIERootPortClass {
>      int exp_offset;
>      int aer_offset;
>      int ssvid_offset;
> +    int acs_offset;    /* If nonzero, optional ACS capability offset */
>      int ssid;
>  } PCIERootPortClass;
>
Re: [Qemu-devel] [PATCH 2/2] gen_pcie_root_port: Add ACS (Access Control Services) capability
Posted by Knut Omang 7 years ago 
On Wed, 2019-01-23 at 12:04 -0700, Alex Williamson wrote:
> On Wed, 23 Jan 2019 19:28:00 +0100
> Knut Omang <knut.omang@oracle.com> wrote:
> 
> > Claiming ACS support allows passthrough of an emulated device
> > (in a nested virt.setting) with VFIO without Alex Williamson's patch
> > for the pcie_acs_override kernel parameter.
> > A similar need appears on Windows with Hyper-V
> > 
> > Signed-off-by: Knut Omang <knut.omang@oracle.com>
> > ---
> >  hw/pci-bridge/gen_pcie_root_port.c | 2 ++
> >  hw/pci-bridge/ioh3420.c            | 1 -
> >  hw/pci-bridge/pcie_root_port.c     | 3 +++
> >  include/hw/pci/pcie_port.h         | 1 +
> >  4 files changed, 6 insertions(+), 1 deletion(-)
> > 
> > diff --git a/hw/pci-bridge/gen_pcie_root_port.c b/hw/pci-bridge/gen_pcie_root_port.c
> > index 9766edb..b5a5ecc 100644
> > --- a/hw/pci-bridge/gen_pcie_root_port.c
> > +++ b/hw/pci-bridge/gen_pcie_root_port.c
> > @@ -20,6 +20,7 @@
> >          OBJECT_CHECK(GenPCIERootPort, (obj), TYPE_GEN_PCIE_ROOT_PORT)
> >  
> >  #define GEN_PCIE_ROOT_PORT_AER_OFFSET           0x100
> > +#define GEN_PCIE_ROOT_PORT_ACS_OFFSET           0x148
> 
> Perhaps (GEN_PCIE_ROOT_PORT_AER_OFFSET + PCI_ERR_SIZEOF)
> 
> >  #define GEN_PCIE_ROOT_PORT_MSIX_NR_VECTOR       1
> >  
> >  typedef struct GenPCIERootPort {
> > @@ -149,6 +150,7 @@ static void gen_rp_dev_class_init(ObjectClass *klass, void *data)
> >      rpc->interrupts_init = gen_rp_interrupts_init;
> >      rpc->interrupts_uninit = gen_rp_interrupts_uninit;
> >      rpc->aer_offset = GEN_PCIE_ROOT_PORT_AER_OFFSET;
> > +    rpc->acs_offset = GEN_PCIE_ROOT_PORT_ACS_OFFSET;
> >  }
> >  
> >  static const TypeInfo gen_rp_dev_info = {
> > diff --git a/hw/pci-bridge/ioh3420.c b/hw/pci-bridge/ioh3420.c
> > index 81f2de6..2064939 100644
> > --- a/hw/pci-bridge/ioh3420.c
> > +++ b/hw/pci-bridge/ioh3420.c
> > @@ -71,7 +71,6 @@ static int ioh3420_interrupts_init(PCIDevice *d, Error **errp)
> >      if (rc < 0) {
> >          assert(rc == -ENOTSUP);
> >      }
> > -
> 
> Unrelated

Oops, will fix, thanks.

Knut 

> 
> >      return rc;
> >  }
> >  
> > diff --git a/hw/pci-bridge/pcie_root_port.c b/hw/pci-bridge/pcie_root_port.c
> > index 34ad767..c33a493 100644
> > --- a/hw/pci-bridge/pcie_root_port.c
> > +++ b/hw/pci-bridge/pcie_root_port.c
> > @@ -106,6 +106,9 @@ static void rp_realize(PCIDevice *d, Error **errp)
> >      pcie_aer_root_init(d);
> >      rp_aer_vector_update(d);
> >  
> > +    if (rpc->acs_offset) {
> > +        pcie_acs_init(d, rpc->acs_offset, 0);
> > +    }
> >      return;
> >  
> >  err:
> > diff --git a/include/hw/pci/pcie_port.h b/include/hw/pci/pcie_port.h
> > index df242a0..09586f4 100644
> > --- a/include/hw/pci/pcie_port.h
> > +++ b/include/hw/pci/pcie_port.h
> > @@ -78,6 +78,7 @@ typedef struct PCIERootPortClass {
> >      int exp_offset;
> >      int aer_offset;
> >      int ssvid_offset;
> > +    int acs_offset;    /* If nonzero, optional ACS capability offset */
> >      int ssid;
> >  } PCIERootPortClass;
> >  
>

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