This currently very much a PoC. Currently the SPDM library only provides
a single function to allow a challenge / authentication of the PCI EP.
SPDM exchanges must occur in one of a small set of valid squences over
which the message digest used in authentication is built up.
Placing that complexity in the SPDM library seems like a good way
to enforce that logic, without having to do it for each transport.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
---
drivers/pci/Kconfig | 9 +++++++++
drivers/pci/Makefile | 1 +
drivers/pci/doe.c | 2 --
include/linux/pci-doe.h | 2 ++
4 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index a30c59cf5e27..43e3b0d5e8cd 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -198,6 +198,15 @@ config PCI_DOE
used by a number of different protocols.
DOE is defined in the Data Object Exchange ECN to the PCIe r5.0 spec.
+config PCI_CMA
+ tristate
+ select PCI_DOE
+ select ASN1_ENCODER
+ select SPDM
+ help
+ This enables library support for the PCI Component Measurement and
+ Authentication ECN. This uses DMTF SPDM 1.1
+
choice
prompt "PCI Express hierarchy optimization setting"
default PCIE_BUS_DEFAULT
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index 1b61c1a1c232..3f6b3543d565 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -29,6 +29,7 @@ obj-$(CONFIG_PCI_PF_STUB) += pci-pf-stub.o
obj-$(CONFIG_PCI_ECAM) += ecam.o
obj-$(CONFIG_PCI_P2PDMA) += p2pdma.o
obj-$(CONFIG_PCI_DOE) += doe.o
+obj-$(CONFIG_PCI_CMA) += cma.o
obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += xen-pcifront.o
# Endpoint library must be initialized before its users
diff --git a/drivers/pci/doe.c b/drivers/pci/doe.c
index 2d20f59e42c6..f6aaeed01010 100644
--- a/drivers/pci/doe.c
+++ b/drivers/pci/doe.c
@@ -20,8 +20,6 @@
/* Maximum number of DOE instances in the system */
#define PCI_DOE_MAX_CNT 65536
-#define PCI_DOE_PROTOCOL_DISCOVERY 0
-
#define PCI_DOE_BUSY_MAX_RETRIES 16
#define PCI_DOE_POLL_INTERVAL (HZ / 128)
diff --git a/include/linux/pci-doe.h b/include/linux/pci-doe.h
index bdc5f15f14ab..1347c124ed70 100644
--- a/include/linux/pci-doe.h
+++ b/include/linux/pci-doe.h
@@ -19,6 +19,8 @@ struct pci_doe_prot {
u8 type;
};
+#define PCI_DOE_PROTOCOL_DISCOVERY 0
+#define PCI_DOE_PROTOCOL_CMA 1
struct workqueue_struct;
enum pci_doe_state {
--
2.19.1
