From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 102EDCF9C77 for ; Thu, 20 Nov 2025 17:26:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ureB8seNOXxtvER5MvqwTnR5PM36IPbwMes+bsnQWL8=; b=KDbH4PWaMT1MGYaPO4Zoeu6dM0 akQ1PaGq7Q8aa9UIRWcmcTkE3YVGUALcyLaevXgVtFUl1S8qbLv4OTz5IJkx4etkoyVu0zhxfUcyd EeqAEeXLwIQUu2phQlm+FsepoG9a2h0XN0gDTqC7DhvZ1K/XfXRLKnAEEsjPGH0GZRKexX1p4agv3 R6v4rA505RfRYX37CAGt7xtOP7IMaG8NxS1ctRXv23BB9DlOwJtqeLp61Ziq9DeYGBz5jhKwdAfu9 vBWzsr4Hi8UUpi0NAmJIWy5bO16BP/LjEgkjXDasnOvdOKkX8oYH2a6rJjX+JwsUmnI0qa76nnKXr O+TmwLbA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vM8Q7-000000075lY-3x7D; Thu, 20 Nov 2025 17:26:11 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vM8Pv-000000075aH-18tL for linux-arm-kernel@lists.infradead.org; Thu, 20 Nov 2025 17:25:59 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id B5C01601EC; Thu, 20 Nov 2025 17:25:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6C76EC4CEF1; Thu, 20 Nov 2025 17:25:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763659558; bh=Qxm/npw8Uip8/iAEYKriMxuKyP/eZuOgIrz+o31fqa8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=StqbXxfvsYTf5jBozKkGyNWw0Ibq29md401enXy0Ay8R48lfqzaL1JbsJwRPNXrpn Xf3/lIWrWs4l2DizpunyKY/lQv0JgAml1OsRWcliY8I0oK8ASqjUyaKr8Y25p271MX rP4V+a0sGRRRvZY9gwMYZXx4LMJupQDc9OFkLTRJpaBrZfo1+DZreON09mkShGpCyO ID3L1bEFXeUDeu/OuFpcpOlmBK4W5EkJ4L7gK4OT5XHTj/IB4EiirJ2HYW2xwfXT3a NhF6yYJRzD5lo7oINDJHtcoENS72LXYAqaCLU65PB1K4SnHIR+rZFgvlCCLtEghx/B Tj6lWrBMrlcdg== 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 1vM8Ps-00000006y6g-20G2; Thu, 20 Nov 2025 17:25:56 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org Cc: Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Christoffer Dall , Fuad Tabba , Mark Brown Subject: [PATCH v4 11/49] KVM: arm64: GICv3: Preserve EOIcount on exit Date: Thu, 20 Nov 2025 17:25:01 +0000 Message-ID: <20251120172540.2267180-12-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251120172540.2267180-1-maz@kernel.org> References: <20251120172540.2267180-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, oupton@kernel.org, yuzenghui@huawei.com, christoffer.dall@arm.com, tabba@google.com, broonie@kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org EOIcount is how the virtual CPU interface signals that the guest is deactivating interrupts outside of the LRs when EOImode==0. We therefore need to preserve that information so that we can find out what actually needs deactivating. Tested-by: Fuad Tabba Signed-off-by: Marc Zyngier --- arch/arm64/kvm/hyp/vgic-v3-sr.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/kvm/hyp/vgic-v3-sr.c b/arch/arm64/kvm/hyp/vgic-v3-sr.c index e72d436dd6a36..9bfcbfd91118a 100644 --- a/arch/arm64/kvm/hyp/vgic-v3-sr.c +++ b/arch/arm64/kvm/hyp/vgic-v3-sr.c @@ -225,6 +225,12 @@ void __vgic_v3_save_state(struct vgic_v3_cpu_if *cpu_if) elrsr = read_gicreg(ICH_ELRSR_EL2); + if (cpu_if->vgic_hcr & ICH_HCR_EL2_LRENPIE) { + u64 val = read_gicreg(ICH_HCR_EL2); + cpu_if->vgic_hcr &= ~ICH_HCR_EL2_EOIcount; + cpu_if->vgic_hcr |= val & ICH_HCR_EL2_EOIcount; + } + write_gicreg(0, ICH_HCR_EL2); for (i = 0; i < used_lrs; i++) { -- 2.47.3