From nobody Mon Apr 6 10:45:02 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id CC47E3DFC81; Mon, 30 Mar 2026 14:24:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774880677; cv=none; b=IkIyUv5g1bhuQWHsGmrtxaBpMUH3ZfsFL1wuW+2UaG9QLlnOK3ofT5W+a6y+LSQHlgSr9VoALPNAmdnykmPdVnWJBJnLTIQHO8ggXDfVJI2eiIduvPbHl9c+DsIXeXVWb/qao5PTnGkoWhv5YqPB4S98kLkGoTXnmYSDLdoixXA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774880677; c=relaxed/simple; bh=nM7LKJkevkOMctRsGY6BgPVCW4ki3JK1AoyQ7rAkiQE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QhAbVLI8YJoyPCQ6NSO+HP0tB6mfkBpmhhLCSqBq5fY2aN6sWawYTza+zI374IUoURh2vTz660e6vK5dB4unCTCLmQk68JgG7KiuAjlrrtA7ZZRF5yRju7Bc1Pa8Y7H+khbkmEVO2J89JCZbbPSRrwQDfgfxZ4T7f+tT4PObOQQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=Ssqi/RZT; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="Ssqi/RZT" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 59B3A451B; Mon, 30 Mar 2026 07:24:28 -0700 (PDT) Received: from ewhatever.cambridge.arm.com (ewhatever.cambridge.arm.com [10.1.197.1]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 8C90C3F915; Mon, 30 Mar 2026 07:24:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1774880674; bh=nM7LKJkevkOMctRsGY6BgPVCW4ki3JK1AoyQ7rAkiQE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ssqi/RZT5qzBhnQW2m1UhNFLk4Btv3Ezi9/3LlIiqIt7myD+H6fHFlMWf+u9m+Eg0 wOa0W3S79Z1HPWw241rJhWLVk8PzWOCRvsCVEjy7NdEsSkaeP1VkrWGqdF4ducxo9v gAjuB8xndVjRuyjZ80sbl7tVaJSqs5MAgsdwqKsQ= From: Suzuki K Poulose To: kvmarm@lists.linux.dev, will@kernel.org Cc: kvm@vger.kernel.org, alexandru.elisei@arm.com, oupton@kernel.org, maz@kernel.org, tabba@google.com, aneesh.kumar@kernel.org, linux-kernel@vger.kernel.org, Oliver Upton , Suzuki K Poulose Subject: [PATCH v7 12/17] arm64: psci: Implement CPU_SUSPEND Date: Mon, 30 Mar 2026 15:23:29 +0100 Message-ID: <20260330142334.3309961-13-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260330142334.3309961-1-suzuki.poulose@arm.com> References: <20260330142334.3309961-1-suzuki.poulose@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Oliver Upton Implement support for PSCI CPU_SUSPEND, leveraging in-kernel suspend emulation (i.e. a WFI state). Eagerly resume the vCPU for any wakeup event. Reviewed-by: Marc Zyngier Signed-off-by: Oliver Upton Signed-off-by: Suzuki K Poulose --- kvm-cpu.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/kvm-cpu.c b/kvm-cpu.c index 7362f2e9..d718ef60 100644 --- a/kvm-cpu.c +++ b/kvm-cpu.c @@ -143,6 +143,16 @@ void kvm_cpu__run_on_all_cpus(struct kvm *kvm, struct = kvm_cpu_task *task) mutex_unlock(&task_lock); } =20 +static void handle_wakeup(struct kvm_cpu *vcpu) +{ + struct kvm_mp_state mp_state =3D { + .mp_state =3D KVM_MP_STATE_RUNNABLE, + }; + + if (ioctl(vcpu->vcpu_fd, KVM_SET_MP_STATE, &mp_state)) + die_perror("KVM_SET_MP_STATE failed"); +} + int kvm_cpu__start(struct kvm_cpu *cpu) { sigset_t sigset; @@ -236,6 +246,9 @@ int kvm_cpu__start(struct kvm_cpu *cpu) */ kvm__reboot(cpu->kvm); goto exit_kvm; + case KVM_SYSTEM_EVENT_WAKEUP: + handle_wakeup(cpu); + break; }; break; default: { --=20 2.43.0