Messages in this thread | | | Date | Wed, 24 Apr 2024 14:19:30 +0100 | Subject | Re: [PATCH v2 14/14] virt: arm-cca-guest: TSM_REPORT support for realms | From | Suzuki K Poulose <> |
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On 12/04/2024 09:42, Steven Price wrote: > From: Sami Mujawar <sami.mujawar@arm.com> > > Introduce an arm-cca-guest driver that registers with > the configfs-tsm module to provide user interfaces for > retrieving an attestation token. > > When a new report is requested the arm-cca-guest driver > invokes the appropriate RSI interfaces to query an > attestation token. > > The steps to retrieve an attestation token are as follows: > 1. Mount the configfs filesystem if not already mounted > mount -t configfs none /sys/kernel/config > 2. Generate an attestation token > report=/sys/kernel/config/tsm/report/report0 > mkdir $report > dd if=/dev/urandom bs=64 count=1 > $report/inblob > hexdump -C $report/outblob > rmdir $report > > Signed-off-by: Sami Mujawar <sami.mujawar@arm.com> > Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> > Signed-off-by: Steven Price <steven.price@arm.com> > --- > drivers/virt/coco/Kconfig | 2 + > drivers/virt/coco/Makefile | 1 + > drivers/virt/coco/arm-cca-guest/Kconfig | 11 + > drivers/virt/coco/arm-cca-guest/Makefile | 2 + > .../virt/coco/arm-cca-guest/arm-cca-guest.c | 208 ++++++++++++++++++ > 5 files changed, 224 insertions(+) > create mode 100644 drivers/virt/coco/arm-cca-guest/Kconfig > create mode 100644 drivers/virt/coco/arm-cca-guest/Makefile > create mode 100644 drivers/virt/coco/arm-cca-guest/arm-cca-guest.c > > diff --git a/drivers/virt/coco/Kconfig b/drivers/virt/coco/Kconfig > index 87d142c1f932..4fb69804b622 100644 > --- a/drivers/virt/coco/Kconfig > +++ b/drivers/virt/coco/Kconfig > @@ -12,3 +12,5 @@ source "drivers/virt/coco/efi_secret/Kconfig" > source "drivers/virt/coco/sev-guest/Kconfig" > > source "drivers/virt/coco/tdx-guest/Kconfig" > + > +source "drivers/virt/coco/arm-cca-guest/Kconfig" > diff --git a/drivers/virt/coco/Makefile b/drivers/virt/coco/Makefile > index 18c1aba5edb7..a6228a1bf992 100644 > --- a/drivers/virt/coco/Makefile > +++ b/drivers/virt/coco/Makefile > @@ -6,3 +6,4 @@ obj-$(CONFIG_TSM_REPORTS) += tsm.o > obj-$(CONFIG_EFI_SECRET) += efi_secret/ > obj-$(CONFIG_SEV_GUEST) += sev-guest/ > obj-$(CONFIG_INTEL_TDX_GUEST) += tdx-guest/ > +obj-$(CONFIG_ARM_CCA_GUEST) += arm-cca-guest/ > diff --git a/drivers/virt/coco/arm-cca-guest/Kconfig b/drivers/virt/coco/arm-cca-guest/Kconfig > new file mode 100644 > index 000000000000..c4039c10dce2 > --- /dev/null > +++ b/drivers/virt/coco/arm-cca-guest/Kconfig > @@ -0,0 +1,11 @@ > +config ARM_CCA_GUEST > + tristate "Arm CCA Guest driver" > + depends on ARM64 > + default m > + select TSM_REPORTS > + help > + The driver provides userspace interface to request and > + attestation report from the Realm Management Monitor(RMM). > + > + If you choose 'M' here, this module will be called > + realm-guest.
This needs to be updated to arm-cca-guest.
Suzuki
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