| Message ID | 20240916143116.169693-6-santosh.shukla@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Interrupt Remap support for emulated amd viommu | expand |
On 9/16/24 10:31, Santosh Shukla wrote: > From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> > > The XTSup mode enables x2APIC support for AMD IOMMU, which is needed > to support vcpu w/ APIC ID > 255. > > Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> > Signed-off-by: Santosh Shukla <santosh.shukla@amd.com> > --- > v2: > - Fixed non-kvm build issue by adding a check for kvm_irqchip_is_split() > > hw/i386/amd_iommu.c | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c > index 9095146525e6..24eebf053df0 100644 > --- a/hw/i386/amd_iommu.c > +++ b/hw/i386/amd_iommu.c > @@ -32,6 +32,7 @@ > #include "trace.h" > #include "hw/i386/apic-msidef.h" > #include "hw/qdev-properties.h" > +#include "kvm/kvm_i386.h" > > /* used AMD-Vi MMIO registers */ > const char *amdvi_mmio_low[] = { > @@ -1651,6 +1652,16 @@ static void amdvi_sysbus_realize(DeviceState *dev, Error **errp) > memory_region_add_subregion_overlap(&s->mr_sys, AMDVI_INT_ADDR_FIRST, > &s->mr_ir, 1); > > + /* AMD IOMMU with x2APIC mode requires xtsup=on */ > + if (x86ms->apic_id_limit > 255 && !s->xtsup) { > + error_report("AMD IOMMU with x2APIC confguration requires xtsup=on"); > + exit(EXIT_FAILURE); > + } > + if (s->xtsup && kvm_irqchip_is_split() && !kvm_enable_x2apic()) { > + error_report("AMD IOMMU xt=on requires support on the KVM side"); Use "xtsup=on" on the error message, "xt" is not a valid option IIUC. Alejandro > + exit(EXIT_FAILURE); > + } > + > pci_setup_iommu(bus, &amdvi_iommu_ops, s); > amdvi_init(s); > }
On 9/21/2024 1:56 AM, Alejandro Jimenez wrote: > > > On 9/16/24 10:31, Santosh Shukla wrote: >> From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> >> >> The XTSup mode enables x2APIC support for AMD IOMMU, which is needed >> to support vcpu w/ APIC ID > 255. >> >> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> >> Signed-off-by: Santosh Shukla <santosh.shukla@amd.com> >> --- >> v2: >> - Fixed non-kvm build issue by adding a check for kvm_irqchip_is_split() >> >> hw/i386/amd_iommu.c | 11 +++++++++++ >> 1 file changed, 11 insertions(+) >> >> diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c >> index 9095146525e6..24eebf053df0 100644 >> --- a/hw/i386/amd_iommu.c >> +++ b/hw/i386/amd_iommu.c >> @@ -32,6 +32,7 @@ >> #include "trace.h" >> #include "hw/i386/apic-msidef.h" >> #include "hw/qdev-properties.h" >> +#include "kvm/kvm_i386.h" >> /* used AMD-Vi MMIO registers */ >> const char *amdvi_mmio_low[] = { >> @@ -1651,6 +1652,16 @@ static void amdvi_sysbus_realize(DeviceState *dev, Error **errp) >> memory_region_add_subregion_overlap(&s->mr_sys, AMDVI_INT_ADDR_FIRST, >> &s->mr_ir, 1); >> + /* AMD IOMMU with x2APIC mode requires xtsup=on */ >> + if (x86ms->apic_id_limit > 255 && !s->xtsup) { >> + error_report("AMD IOMMU with x2APIC confguration requires xtsup=on"); >> + exit(EXIT_FAILURE); >> + } >> + if (s->xtsup && kvm_irqchip_is_split() && !kvm_enable_x2apic()) { >> + error_report("AMD IOMMU xt=on requires support on the KVM side"); > > Use "xtsup=on" on the error message, "xt" is not a valid option IIUC. > Yes - V3, thank you for spotting. Thanks, Santosh > Alejandro > >> + exit(EXIT_FAILURE); >> + } >> + >> pci_setup_iommu(bus, &amdvi_iommu_ops, s); >> amdvi_init(s); >> }
diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c index 9095146525e6..24eebf053df0 100644 --- a/hw/i386/amd_iommu.c +++ b/hw/i386/amd_iommu.c @@ -32,6 +32,7 @@ #include "trace.h" #include "hw/i386/apic-msidef.h" #include "hw/qdev-properties.h" +#include "kvm/kvm_i386.h" /* used AMD-Vi MMIO registers */ const char *amdvi_mmio_low[] = { @@ -1651,6 +1652,16 @@ static void amdvi_sysbus_realize(DeviceState *dev, Error **errp) memory_region_add_subregion_overlap(&s->mr_sys, AMDVI_INT_ADDR_FIRST, &s->mr_ir, 1); + /* AMD IOMMU with x2APIC mode requires xtsup=on */ + if (x86ms->apic_id_limit > 255 && !s->xtsup) { + error_report("AMD IOMMU with x2APIC confguration requires xtsup=on"); + exit(EXIT_FAILURE); + } + if (s->xtsup && kvm_irqchip_is_split() && !kvm_enable_x2apic()) { + error_report("AMD IOMMU xt=on requires support on the KVM side"); + exit(EXIT_FAILURE); + } + pci_setup_iommu(bus, &amdvi_iommu_ops, s); amdvi_init(s); }