Merge branch kvm-arm64/misc-6.1 into kvmarm-master/next

* kvm-arm64/misc-6.1:
  : .
  : Misc KVM/arm64 fixes and improvement for v6.1
  :
  : - Simplify the affinity check when moving a GICv3 collection
  :
  : - Tone down the shouting when kvm-arm.mode=protected is passed
  :   to a guest
  :
  : - Fix various comments
  :
  : - Advertise the new kvmarm@lists.linux.dev and deprecate the
  :   old Columbia list
  : .
  KVM: arm64: Advertise new kvmarm mailing list
  KVM: arm64: Fix comment typo in nvhe/switch.c
  KVM: selftests: Update top-of-file comment in psci_test
  KVM: arm64: Ignore kvm-arm.mode if !is_hyp_mode_available()
  KVM: arm64: vgic: Remove duplicate check in update_affinity_collection()

Signed-off-by: Marc Zyngier <maz@kernel.org>

5 files changed, 20 insertions, 12 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 589517372408..f29f27717de4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11124,7 +11124,8 @@ R:	Alexandru Elisei <alexandru.elisei@arm.com>
 R:	Suzuki K Poulose <suzuki.poulose@arm.com>
 R:	Oliver Upton <oliver.upton@linux.dev>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
-L:	kvmarm@lists.cs.columbia.edu (moderated for non-subscribers)
+L:	kvmarm@lists.linux.dev
+L:	kvmarm@lists.cs.columbia.edu (deprecated, moderated for non-subscribers)
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git
 F:	arch/arm64/include/asm/kvm*
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 2ff0ef62abad..c7fb2ad8be9f 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -2270,6 +2270,16 @@ static int __init early_kvm_mode_cfg(char *arg)
 	if (!arg)
 		return -EINVAL;
 
+	if (strcmp(arg, "none") == 0) {
+		kvm_mode = KVM_MODE_NONE;
+		return 0;
+	}
+
+	if (!is_hyp_mode_available()) {
+		pr_warn_once("KVM is not available. Ignoring kvm-arm.mode\n");
+		return 0;
+	}
+
 	if (strcmp(arg, "protected") == 0) {
 		if (!is_kernel_in_hyp_mode())
 			kvm_mode = KVM_MODE_PROTECTED;
@@ -2284,11 +2294,6 @@ static int __init early_kvm_mode_cfg(char *arg)
 		return 0;
 	}
 
-	if (strcmp(arg, "none") == 0) {
-		kvm_mode = KVM_MODE_NONE;
-		return 0;
-	}
-
 	return -EINVAL;
 }
 early_param("kvm-arm.mode", early_kvm_mode_cfg);
diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/switch.c
index 9f6385702061..8e9d49a964be 100644
--- a/arch/arm64/kvm/hyp/nvhe/switch.c
+++ b/arch/arm64/kvm/hyp/nvhe/switch.c
@@ -143,7 +143,7 @@ static void __hyp_vgic_save_state(struct kvm_vcpu *vcpu)
 	}
 }
 
-/* Restore VGICv3 state on non_VEH systems */
+/* Restore VGICv3 state on non-VHE systems */
 static void __hyp_vgic_restore_state(struct kvm_vcpu *vcpu)
 {
 	if (static_branch_unlikely(&kvm_vgic_global_state.gicv3_cpuif)) {
diff --git a/arch/arm64/kvm/vgic/vgic-its.c b/arch/arm64/kvm/vgic/vgic-its.c
index 9d3299a70242..24d7778d1ce6 100644
--- a/arch/arm64/kvm/vgic/vgic-its.c
+++ b/arch/arm64/kvm/vgic/vgic-its.c
@@ -406,7 +406,7 @@ static void update_affinity_collection(struct kvm *kvm, struct vgic_its *its,
 	struct its_ite *ite;
 
 	for_each_lpi_its(device, ite, its) {
-		if (!ite->collection || coll != ite->collection)
+		if (ite->collection != coll)
 			continue;
 
 		update_affinity_ite(kvm, ite);
diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c
index f7621f6e938e..e0b9e81a3e09 100644
--- a/tools/testing/selftests/kvm/aarch64/psci_test.c
+++ b/tools/testing/selftests/kvm/aarch64/psci_test.c
@@ -1,12 +1,14 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * psci_cpu_on_test - Test that the observable state of a vCPU targeted by the
- * CPU_ON PSCI call matches what the caller requested.
+ * psci_test - Tests relating to KVM's PSCI implementation.
  *
  * Copyright (c) 2021 Google LLC.
  *
- * This is a regression test for a race between KVM servicing the PSCI call and
- * userspace reading the vCPUs registers.
+ * This test includes:
+ *  - A regression test for a race between KVM servicing the PSCI CPU_ON call
+ *    and userspace reading the targeted vCPU's registers.
+ *  - A test for KVM's handling of PSCI SYSTEM_SUSPEND and the associated
+ *    KVM_SYSTEM_EVENT_SUSPEND UAPI.
  */
 
 #define _GNU_SOURCE