From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 27A6336166F for ; Tue, 12 May 2026 14:50:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778597451; cv=none; b=a3UrkMxSI741s2Bipm99U2zZx2bQ2HbVPt/fDj/ExFFjc0JgnhMen/mkkhvh+z1ck6tjjRq2H6idpSsdk6elSxVQFMQqIcoo0TdNnVL6nfM3PGGgojvGsVfDcAVVQhIR9m8KBXcmjhikUmXJIx6DFphXVN+7UPGvepCaS/gqhmY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778597451; c=relaxed/simple; bh=6bBYy1l66boLo3eZPCikdcO6FIZ1uvzNOcdkpaGvaE4=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fM6JjNU6ZZy5IdTWrtnYgSxgFb6hZapLEkajB57H/zMf8yNolhCwLT+Guabog4PWz1NDBt+x4/FQAoZn9qx8cAGlySGDiwe3Ime9JMnec0USz37BCVKElL3gSrLGoQL29gMMW3Uwj+yq8ICsZ7yqC9akhYVxmzwTHS5BQH9bIEU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=COq/mlbV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="COq/mlbV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0E0F5C2BCB0 for ; Tue, 12 May 2026 14:50:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778597451; bh=6bBYy1l66boLo3eZPCikdcO6FIZ1uvzNOcdkpaGvaE4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=COq/mlbVENi9EzEyyJNBZTf0KVuPBymc+zyqvyYywxuDRyRhw01Q5fkI8vSQisTCG cOc9+FEzhYpKfib5e8mHEUnrCPvbY8U6j/Kd45ZcrCjpbuTGUoaMG7PzIjIOy+w9fy TTxqvIBaNb5VZNiTPGb9sSrDxbD4NY6W0MATNrtCgYJ4G62hQTfEqnuzKgh3ZsNqzV XUF1F6W8gZW9OpiSuqOoCziOlhy2eidy+aft+PkPdOVauOMBpJMuiu2u7HHmGeRcWr Svm01L0F7QMdyqdY9RkIvAju1zVRP5z6m+z855CdmPLawu+/vFvftYSUu+dRhnOFgj ONs9dImhNkJHA== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1wMoRd-00000001b2L-0h6v for stable@vger.kernel.org; Tue, 12 May 2026 14:50:49 +0000 From: Marc Zyngier To: stable@vger.kernel.org Subject: [PATCH 6.6.y] KVM: arm64: Wake-up from WFI when iqrchip is in userspace Date: Tue, 12 May 2026 15:50:35 +0100 Message-ID: <20260512145035.3676967-1-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <2026051236-flaxseed-tiring-cf79@gregkh> References: <2026051236-flaxseed-tiring-cf79@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: stable@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false commit 4ce98bf0865c349e7026ad9c14f48da264920953 upstream It appears that there is nothing in the wake-up path that evaluates whether the in-kernel interrupts are pending unless we have a vgic. This means that the userspace irqchip support has been broken for about four years, and nobody noticed. It was also broken before as we wouldn't wake-up on a PMU interrupt, but hey, who cares... It is probably time to remove the feature altogether, because it was a terrible idea 10 years ago, and it still is. Fixes: b57de4ffd7c6d ("KVM: arm64: Simplify kvm_cpu_has_pending_timer()") Link: https://patch.msgid.link/20260423163607.486345-1-maz@kernel.org Signed-off-by: Marc Zyngier Cc: stable@vger.kernel.org Signed-off-by: Marc Zyngier --- arch/arm64/kvm/arm.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index fe4314af8eecc..3ae529e967c7f 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -557,6 +557,11 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) { bool irq_lines = *vcpu_hcr(v) & (HCR_VI | HCR_VF); + + irq_lines |= (!irqchip_in_kernel(v->kvm) && + (kvm_timer_should_notify_user(v) || + kvm_pmu_should_notify_user(v))); + return ((irq_lines || kvm_vgic_vcpu_pending_irq(v)) && !kvm_arm_vcpu_stopped(v) && !v->arch.pause); } -- 2.47.3