| Message ID | 20240502152810.187492-10-clement.mathieu--drif@eviden.com |
|---|---|
| State | New |
| Headers | show |
| Series | ATS support for VT-d | expand |
>-----Original Message----- >From: CLEMENT MATHIEU--DRIF <clement.mathieu--drif@eviden.com> >Subject: [PATCH ats_vtd v1 09/24] pcie: helper functions to check if PASID >and ATS are enabled > >ats_enabled and pasid_enabled check whether the capabilities are >present or not. If so, we read the configuration space to get >the status of the feature (enabled or not). s/present/enabled/ > >Signed-off-by: Clément Mathieu--Drif <clement.mathieu--drif@eviden.com> >--- > hw/pci/pcie.c | 18 ++++++++++++++++++ > include/hw/pci/pcie.h | 3 +++ > 2 files changed, 21 insertions(+) > >diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c >index c8e9d4c0f7..2a638a9c3f 100644 >--- a/hw/pci/pcie.c >+++ b/hw/pci/pcie.c >@@ -1201,3 +1201,21 @@ 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; >+} >+ >+bool pcie_ats_enabled(const PCIDevice *dev) >+{ >+ if (!pci_is_express(dev) || !dev->exp.ats_cap) { >+ return false; >+ } >+ return (pci_get_word(dev->config + dev->exp.ats_cap + PCI_ATS_CTRL) & >+ PCI_ATS_CTRL_ENABLE) != 0; >+} >diff --git a/include/hw/pci/pcie.h b/include/hw/pci/pcie.h >index c59627d556..8c222f09da 100644 >--- a/include/hw/pci/pcie.h >+++ b/include/hw/pci/pcie.h >@@ -151,4 +151,7 @@ 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); >+bool pcie_ats_enabled(const PCIDevice *dev); > #endif /* QEMU_PCIE_H */ >-- >2.44.0
diff --git a/hw/pci/pcie.c b/hw/pci/pcie.c index c8e9d4c0f7..2a638a9c3f 100644 --- a/hw/pci/pcie.c +++ b/hw/pci/pcie.c @@ -1201,3 +1201,21 @@ 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; +} + +bool pcie_ats_enabled(const PCIDevice *dev) +{ + if (!pci_is_express(dev) || !dev->exp.ats_cap) { + return false; + } + return (pci_get_word(dev->config + dev->exp.ats_cap + PCI_ATS_CTRL) & + PCI_ATS_CTRL_ENABLE) != 0; +} diff --git a/include/hw/pci/pcie.h b/include/hw/pci/pcie.h index c59627d556..8c222f09da 100644 --- a/include/hw/pci/pcie.h +++ b/include/hw/pci/pcie.h @@ -151,4 +151,7 @@ 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); +bool pcie_ats_enabled(const PCIDevice *dev); #endif /* QEMU_PCIE_H */
ats_enabled and pasid_enabled check whether the capabilities are present or not. If so, we read the configuration space to get the status of the feature (enabled or not). Signed-off-by: Clément Mathieu--Drif <clement.mathieu--drif@eviden.com> --- hw/pci/pcie.c | 18 ++++++++++++++++++ include/hw/pci/pcie.h | 3 +++ 2 files changed, 21 insertions(+)