diff options
| author | Jeremy Linton <jeremy.linton@arm.com> | 2024-12-20 12:12:36 -0600 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2025-01-08 13:58:49 +0000 |
| commit | a1edec22457e6fabc5450a6eea7fdc0e1b6dab31 (patch) | |
| tree | 282f2490664f0fe82bc9c8c88d5b181f6a80bcc5 /drivers/virt | |
| parent | fac04efc5c793dccbd07e2d59af9f90b7fc0dca4 (diff) | |
arm64: rsi: Add automatic arm-cca-guest module loading
The TSM module provides guest identification and attestation when a
guest runs in CCA realm mode. By creating a dummy platform device,
let's ensure the module is automatically loaded. The udev daemon loads
the TSM module after it receives a device addition event. Once that
happens, it can be used earlier in the boot process to decrypt the
rootfs.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20241220181236.172060-2-jeremy.linton@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/virt')
| -rw-r--r-- | drivers/virt/coco/arm-cca-guest/arm-cca-guest.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/virt/coco/arm-cca-guest/arm-cca-guest.c b/drivers/virt/coco/arm-cca-guest/arm-cca-guest.c index 488153879ec9..87f162736b2e 100644 --- a/drivers/virt/coco/arm-cca-guest/arm-cca-guest.c +++ b/drivers/virt/coco/arm-cca-guest/arm-cca-guest.c @@ -6,6 +6,7 @@ #include <linux/arm-smccc.h> #include <linux/cc_platform.h> #include <linux/kernel.h> +#include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/smp.h> #include <linux/tsm.h> @@ -219,6 +220,13 @@ static void __exit arm_cca_guest_exit(void) } module_exit(arm_cca_guest_exit); +/* modalias, so userspace can autoload this module when RSI is available */ +static const struct platform_device_id arm_cca_match[] __maybe_unused = { + { RSI_PDEV_NAME, 0}, + { } +}; + +MODULE_DEVICE_TABLE(platform, arm_cca_match); MODULE_AUTHOR("Sami Mujawar <sami.mujawar@arm.com>"); MODULE_DESCRIPTION("Arm CCA Guest TSM Driver"); MODULE_LICENSE("GPL"); |