[RFC kvmtool 14/31] arm64: Add configuration step for Realms
From: Suzuki K Poulose <suzuki.poulose@arm.com>
Date: 2023-01-27 11:41:49
Also in:
kvm, kvmarm, linux-coco, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
Realm must be configured before it is created. Add the step to specify the parameters for the Realm. Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> --- arm/aarch64/realm.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/arm/aarch64/realm.c b/arm/aarch64/realm.c
index 3a4adb66..31543e55 100644
--- a/arm/aarch64/realm.c
+++ b/arm/aarch64/realm.c@@ -2,6 +2,29 @@ #include <asm/realm.h> + +static void realm_configure_hash_algo(struct kvm *kvm) +{ + struct kvm_cap_arm_rme_config_item hash_algo_cfg = { + .cfg = KVM_CAP_ARM_RME_CFG_HASH_ALGO, + .hash_algo = kvm->arch.measurement_algo, + }; + + struct kvm_enable_cap rme_config = { + .cap = KVM_CAP_ARM_RME, + .args[0] = KVM_CAP_ARM_RME_CONFIG_REALM, + .args[1] = (u64)&hash_algo_cfg, + }; + + if (ioctl(kvm->vm_fd, KVM_ENABLE_CAP, &rme_config) < 0) + die_perror("KVM_CAP_RME(KVM_CAP_ARM_RME_CONFIG_REALM) hash_algo"); +} + +static void realm_configure_parameters(struct kvm *kvm) +{ + realm_configure_hash_algo(kvm); +} + void kvm_arm_realm_create_realm_descriptor(struct kvm *kvm) { struct kvm_enable_cap rme_create_rd = {
@@ -9,6 +32,7 @@ void kvm_arm_realm_create_realm_descriptor(struct kvm *kvm) .args[0] = KVM_CAP_ARM_RME_CREATE_RD, }; + realm_configure_parameters(kvm); if (ioctl(kvm->vm_fd, KVM_ENABLE_CAP, &rme_create_rd) < 0) die_perror("KVM_CAP_RME(KVM_CAP_ARM_RME_CREATE_RD)"); }
--
2.34.1
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