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Tsirkin" To: qemu-devel@nongnu.org Cc: Peter Maydell , CLEMENT MATHIEU--DRIF , Marcel Apfelbaum Subject: [PULL 05/31] pcie: Helper functions to check if PASID is enabled Message-ID: <1e82e8a828cf18a8abfeca7295322db91879de04.1748791463.git.mst@redhat.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Received-SPF: pass client-ip=170.10.129.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.071, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=-1, RCVD_IN_MSPIKE_WL=-0.01, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: CLEMENT MATHIEU--DRIF pasid_enabled checks whether the capability is present or not. If so, we read the configuration space to get the status of the feature (enabled or not). Signed-off-by: Clement Mathieu--Drif Message-Id: <20250520071823.764266-3-clement.mathieu--drif@eviden.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- include/hw/pci/pcie.h | 2 ++ hw/pci/pcie.c | 9 +++++++++ 2 files changed, 11 insertions(+) diff --git a/include/hw/pci/pcie.h b/include/hw/pci/pcie.h index fe82e0a915..dff98ff2c6 100644 --- a/include/hw/pci/pcie.h +++ b/include/hw/pci/pcie.h @@ -154,4 +154,6 @@ void pcie_cap_slot_unplug_request_cb(HotplugHandler *hotplug_dev, void pcie_pasid_init(PCIDevice *dev, uint16_t offset, uint8_t pasid_width, bool exec_perm, bool priv_mod); + +bool pcie_pasid_enabled(const PCIDevice *dev); #endif /* QEMU_PCIE_H */ diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c index 4f935ff420..db9756d861 100644 --- a/hw/pci/pcie.c +++ b/hw/pci/pcie.c @@ -1239,3 +1239,12 @@ void pcie_pasid_init(PCIDevice *dev, uint16_t offset, uint8_t pasid_width, dev->exp.pasid_cap = offset; } + +bool pcie_pasid_enabled(const PCIDevice *dev) +{ + if (!pci_is_express(dev) || !dev->exp.pasid_cap) { + return false; + } + return (pci_get_word(dev->config + dev->exp.pasid_cap + PCI_PASID_CTRL) & + PCI_PASID_CTRL_ENABLE) != 0; +} -- MST