virtio,pci,pc: features, fixes

[PULL 37/75] pcie: Add a way to get the outstanding page request allocation (pri) from the config space.

Michael S. Tsirkin posted 75 patches 1 month, 1 week ago

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Maintainers: "Michael S. Tsirkin" <mst@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Dongjiu Geng <gengdongjiu1@gmail.com>, Stefano Garzarella <sgarzare@redhat.com>, Igor Mammedov <imammedo@redhat.com>, Ani Sinha <anisinha@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Mauro Carvalho Chehab <mchehab+huawei@kernel.org>, Shannon Zhao <shannon.zhaosl@gmail.com>, Peter Maydell <peter.maydell@linaro.org>, Stefan Hajnoczi <stefanha@redhat.com>, Kevin Wolf <kwolf@redhat.com>, Hanna Reitz <hreitz@redhat.com>, Eduardo Habkost <eduardo@habkost.net>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Yanan Wang <wangyanan55@huawei.com>, Zhao Liu <zhao1.liu@intel.com>, Richard Henderson <richard.henderson@linaro.org>, Jason Wang <jasowang@redhat.com>, Yi Liu <yi.l.liu@intel.com>, "Clément Mathieu--Drif" <clement.mathieu--drif@eviden.com>, Dmitry Fleytman <dmitry.fleytman@gmail.com>, Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>, Sriram Yagnaraman <sriram.yagnaraman@ericsson.com>, Keith Busch <kbusch@kernel.org>, Klaus Jensen <its@irrelevant.dk>, Jesper Devantier <foss@defmacro.it>, Fam Zheng <fam@euphon.net>, David Hildenbrand <david@redhat.com>, Cornelia Huck <cohuck@redhat.com>, Luigi Rizzo <rizzo@iet.unipi.it>, Giuseppe Lettieri <g.lettieri@iet.unipi.it>, Vincenzo Maffione <v.maffione@gmail.com>, Eric Blake <eblake@redhat.com>, Markus Armbruster <armbru@redhat.com>, Michael Roth <michael.roth@amd.com>, John Snow <jsnow@redhat.com>, Cleber Rosa <crosa@redhat.com>, Peter Xu <peterx@redhat.com>, Fabiano Rosas <farosas@suse.de>, Laurent Vivier <lvivier@redhat.com>

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[PULL 37/75] pcie: Add a way to get the outstanding page request allocation (pri) from the config space.

Posted by Michael S. Tsirkin 1 month, 1 week ago

From: CLEMENT MATHIEU--DRIF <clement.mathieu--drif@eviden.com>

Signed-off-by: Clement Mathieu--Drif <clement.mathieu--drif@eviden.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20250901111630.1018573-2-clement.mathieu--drif@eviden.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/pci/pcie.h | 1 +
 hw/pci/pcie.c         | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/include/hw/pci/pcie.h b/include/hw/pci/pcie.h
index ff6ce08e13..42cebcd033 100644
--- a/include/hw/pci/pcie.h
+++ b/include/hw/pci/pcie.h
@@ -158,6 +158,7 @@ void pcie_pasid_init(PCIDevice *dev, uint16_t offset, uint8_t pasid_width,
 void pcie_pri_init(PCIDevice *dev, uint16_t offset, uint32_t outstanding_pr_cap,
                    bool prg_response_pasid_req);
 
+uint32_t pcie_pri_get_req_alloc(const PCIDevice *dev);
 bool pcie_pri_enabled(const PCIDevice *dev);
 bool pcie_pasid_enabled(const PCIDevice *dev);
 bool pcie_ats_enabled(const PCIDevice *dev);
diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c
index eaeb68894e..b302de6419 100644
--- a/hw/pci/pcie.c
+++ b/hw/pci/pcie.c
@@ -1266,6 +1266,14 @@ void pcie_pri_init(PCIDevice *dev, uint16_t offset, uint32_t outstanding_pr_cap,
     dev->exp.pri_cap = offset;
 }
 
+uint32_t pcie_pri_get_req_alloc(const PCIDevice *dev)
+{
+    if (!pcie_pri_enabled(dev)) {
+        return 0;
+    }
+    return pci_get_long(dev->config + dev->exp.pri_cap + PCI_PRI_ALLOC_REQ);
+}
+
 bool pcie_pri_enabled(const PCIDevice *dev)
 {
     if (!pci_is_express(dev) || !dev->exp.pri_cap) {
-- 
MST