The SDEI functionality is ready and lets exposes the capability
and service.
* KVM_CAP_ARM_SDEI
* KVM_REG_ARM_STD_BIT_SDEI in pseudo-firmware bitmap register
KVM_REG_ARM_STD_BMAP
* The events for software signaled one (0x0) and Async PF (0x1)
are exposed.
Signed-off-by: Gavin Shan <gshan@xxxxxxxxxx>
---
Documentation/virt/kvm/api.rst | 11 +++++++++++
Documentation/virt/kvm/arm/hypercalls.rst | 4 ++++
arch/arm64/include/asm/kvm_sdei.h | 2 ++
arch/arm64/include/uapi/asm/kvm.h | 1 +
arch/arm64/kvm/arm.c | 1 +
arch/arm64/kvm/hypercalls.c | 4 ++++
include/uapi/linux/kvm.h | 1 +
7 files changed, 24 insertions(+)
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index 11e00a46c610..011ec0987d71 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -7956,6 +7956,17 @@ should adjust CPUID leaf 0xA to reflect that the PMU is disabled.
When enabled, KVM will exit to userspace with KVM_EXIT_SYSTEM_EVENT of
type KVM_SYSTEM_EVENT_SUSPEND to process the guest suspend request.
+8.37 KVM_CAP_ARM_SDEI
+---------------------
+
+:Capability: KVM_CAP_ARM_SDEI
+:Architectures: arm64
+:Type: vm
+
+This capability indicates that the SDEI virtual service is supported
+in the host. A VMM can check whether the service is available to enable
+it.
+
9. Known KVM API problems
=========================
diff --git a/Documentation/virt/kvm/arm/hypercalls.rst b/Documentation/virt/kvm/arm/hypercalls.rst
index 3e23084644ba..8b8159988934 100644
--- a/Documentation/virt/kvm/arm/hypercalls.rst
+++ b/Documentation/virt/kvm/arm/hypercalls.rst
@@ -106,6 +106,10 @@ The pseudo-firmware bitmap register are as follows:
The bit represents the services offered under v1.0 of ARM True Random
Number Generator (TRNG) specification, ARM DEN0098.
+ Bit-1: KVM_REG_ARM_STD_BIT_SDEI:
+ The bit represents the services offered under v1.1 of ARM Software
+ Delegated Exception Interface (SDEI) specification, ARM DEN0054C.
+
* KVM_REG_ARM_STD_HYP_BMAP:
Controls the bitmap of the ARM Standard Hypervisor Service Calls.
diff --git a/arch/arm64/include/asm/kvm_sdei.h b/arch/arm64/include/asm/kvm_sdei.h
index a1e960943515..a68d40137a88 100644
--- a/arch/arm64/include/asm/kvm_sdei.h
+++ b/arch/arm64/include/asm/kvm_sdei.h
@@ -15,6 +15,8 @@
#include <linux/bits.h>
enum {
+ KVM_SDEI_EVENT_SW_SIGNALED = 0,
+ KVM_SDEI_EVENT_ASYNC_PF,
KVM_NR_SDEI_EVENTS,
};
diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h
index 3bb134355874..cc3251381960 100644
--- a/arch/arm64/include/uapi/asm/kvm.h
+++ b/arch/arm64/include/uapi/asm/kvm.h
@@ -344,6 +344,7 @@ struct kvm_arm_copy_mte_tags {
enum {
KVM_REG_ARM_STD_BIT_TRNG_V1_0 = 0,
+ KVM_REG_ARM_STD_BIT_SDEI,
#ifdef __KERNEL__
KVM_REG_ARM_STD_BMAP_BIT_COUNT,
#endif
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 06cb5e38634e..15ead92ad26d 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -217,6 +217,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_VCPU_ATTRIBUTES:
case KVM_CAP_PTP_KVM:
case KVM_CAP_ARM_SYSTEM_SUSPEND:
+ case KVM_CAP_ARM_SDEI:
r = 1;
break;
case KVM_CAP_SET_GUEST_DEBUG2:
diff --git a/arch/arm64/kvm/hypercalls.c b/arch/arm64/kvm/hypercalls.c
index 88561ac47301..aaa5197ffe83 100644
--- a/arch/arm64/kvm/hypercalls.c
+++ b/arch/arm64/kvm/hypercalls.c
@@ -99,6 +99,10 @@ static bool kvm_hvc_call_allowed(struct kvm_vcpu *vcpu, u32 func)
struct kvm_smccc_features *smccc_feat = &vcpu->kvm->arch.smccc_feat;
switch (func) {
+ case SDEI_1_0_FN(ARM_SMCCC_STANDARD_SDEI_START - 0x20) ...
+ SDEI_1_0_FN(ARM_SMCCC_STANDARD_SDEI_END - 0x20):
+ return test_bit(KVM_REG_ARM_STD_BIT_SDEI,
+ &smccc_feat->std_bmap);
case ARM_SMCCC_TRNG_VERSION:
case ARM_SMCCC_TRNG_FEATURES:
case ARM_SMCCC_TRNG_GET_UUID:
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 5088bd9f1922..65622bcaeec3 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1157,6 +1157,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_VM_TSC_CONTROL 214
#define KVM_CAP_SYSTEM_EVENT_DATA 215
#define KVM_CAP_ARM_SYSTEM_SUSPEND 216
+#define KVM_CAP_ARM_SDEI 217
#ifdef KVM_CAP_IRQ_ROUTING
--
2.23.0
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