| Message ID | 20240823132137.336874-4-aik@amd.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Secure VFIO, TDISP, SEV TIO | expand |
On Fri, Aug 23, 2024 at 11:21:17PM +1000, Alexey Kardashevskiy wrote: > A new bit #30 from the PCI Express Device Capabilities Register is defined > in PCIe 6.1 as "TEE Device Interface Security Protocol (TDISP)". Include spec section number.
On Fri, 23 Aug 2024 23:21:17 +1000 Alexey Kardashevskiy <aik@amd.com> wrote: > A new bit #30 from the PCI Express Device Capabilities Register is defined > in PCIe 6.1 as "TEE Device Interface Security Protocol (TDISP)". No it isn't. TEE-IO supported - When Set, this bit indicates the Function implements the TEE-IO functionality as described by .... So it is defined as TEE-IO not TDISP even though that definition is in the TDISP section fo the spec. As Bjorn said, spec reference. Jonathan > > Define the macro. > > Signed-off-by: Alexey Kardashevskiy <aik@amd.com> > --- > include/uapi/linux/pci_regs.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h > index 94c00996e633..0011a301b8c5 100644 > --- a/include/uapi/linux/pci_regs.h > +++ b/include/uapi/linux/pci_regs.h > @@ -498,6 +498,7 @@ > #define PCI_EXP_DEVCAP_PWR_VAL 0x03fc0000 /* Slot Power Limit Value */ > #define PCI_EXP_DEVCAP_PWR_SCL 0x0c000000 /* Slot Power Limit Scale */ > #define PCI_EXP_DEVCAP_FLR 0x10000000 /* Function Level Reset */ > +#define PCI_EXP_DEVCAP_TEE_IO 0x40000000 /* TEE-IO Supported (TDISP) */ > #define PCI_EXP_DEVCTL 0x08 /* Device Control */ > #define PCI_EXP_DEVCTL_CERE 0x0001 /* Correctable Error Reporting En. */ > #define PCI_EXP_DEVCTL_NFERE 0x0002 /* Non-Fatal Error Reporting Enable */
Alexey Kardashevskiy wrote: > A new bit #30 from the PCI Express Device Capabilities Register is defined > in PCIe 6.1 as "TEE Device Interface Security Protocol (TDISP)". > > Define the macro. > > Signed-off-by: Alexey Kardashevskiy <aik@amd.com> > --- > include/uapi/linux/pci_regs.h | 1 + > 1 file changed, 1 insertion(+) Not sure this is justified as a standalone patch, lets fold it in with its user.
On 30/8/24 12:21, Dan Williams wrote: > Alexey Kardashevskiy wrote: >> A new bit #30 from the PCI Express Device Capabilities Register is defined >> in PCIe 6.1 as "TEE Device Interface Security Protocol (TDISP)". >> >> Define the macro. >> >> Signed-off-by: Alexey Kardashevskiy <aik@amd.com> >> --- >> include/uapi/linux/pci_regs.h | 1 + >> 1 file changed, 1 insertion(+) > > Not sure this is justified as a standalone patch, lets fold it in with > its user. not sure either but this one is already defined in the PCIe spec for some time and lspci knows it but it is going quite some time before "its user" makes it to the upstream linux.
Alexey Kardashevskiy wrote: > On 30/8/24 12:21, Dan Williams wrote: > > Alexey Kardashevskiy wrote: > >> A new bit #30 from the PCI Express Device Capabilities Register is defined > >> in PCIe 6.1 as "TEE Device Interface Security Protocol (TDISP)". > >> > >> Define the macro. > >> > >> Signed-off-by: Alexey Kardashevskiy <aik@amd.com> > >> --- > >> include/uapi/linux/pci_regs.h | 1 + > >> 1 file changed, 1 insertion(+) > > > > Not sure this is justified as a standalone patch, lets fold it in with > > its user. > > not sure either but this one is already defined in the PCIe spec for > some time and lspci knows it but it is going quite some time before "its > user" makes it to the upstream linux. So, wait. I.e. if the answer to the question "what does Linux lose by not merging a patch?" is "nothing", then there is no urgency to merge it.
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index 94c00996e633..0011a301b8c5 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -498,6 +498,7 @@ #define PCI_EXP_DEVCAP_PWR_VAL 0x03fc0000 /* Slot Power Limit Value */ #define PCI_EXP_DEVCAP_PWR_SCL 0x0c000000 /* Slot Power Limit Scale */ #define PCI_EXP_DEVCAP_FLR 0x10000000 /* Function Level Reset */ +#define PCI_EXP_DEVCAP_TEE_IO 0x40000000 /* TEE-IO Supported (TDISP) */ #define PCI_EXP_DEVCTL 0x08 /* Device Control */ #define PCI_EXP_DEVCTL_CERE 0x0001 /* Correctable Error Reporting En. */ #define PCI_EXP_DEVCTL_NFERE 0x0002 /* Non-Fatal Error Reporting Enable */
A new bit #30 from the PCI Express Device Capabilities Register is defined in PCIe 6.1 as "TEE Device Interface Security Protocol (TDISP)". Define the macro. Signed-off-by: Alexey Kardashevskiy <aik@amd.com> --- include/uapi/linux/pci_regs.h | 1 + 1 file changed, 1 insertion(+)