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 7606DC47077 for ; Sun, 14 Jan 2024 12:45:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=WE5q7XRwAwMOUHnp0iWDXGomVF17VLCm+iadsOqZ8FU=; b=CJ5by4/Ncd6Eo1 z2EesPqYIYe2EVwVIE+Atx0Nf+1lANPqWj/3chtSwF/JQu6VAwYW8tBKz3xf7Fz8g9jai7K9uRgAi mAYqtVI8zTF4CDwTJ6/UPU8y2gN+fJL8NHqzCW10nxG/sX+HqDoxcgQ4kEKSE5qdHKrVDoRhOczw7 AWWM7E0odc1SKsq2wji6jrtLxELKHyw9nMQa0uuRQiID3lGPfnLb9w6z2W3A15uf2wTczGbjZT4Jm IrMhqoAEqCNhS+giiF+/2+ezytKJbIPVKS0ZdA3ZdybhbzwccHHrEJxxSLbsD7+K6IJO2wzH9YtyG +z6olgtn6sG6SfM0TjtA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rOzrK-006k7m-1N; Sun, 14 Jan 2024 12:45:02 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rOzrH-006k5t-1Y for linux-arm-kernel@lists.infradead.org; Sun, 14 Jan 2024 12:45:00 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 2F38260B7F; Sun, 14 Jan 2024 12:44:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C974FC433C7; Sun, 14 Jan 2024 12:44:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705236289; bh=CRiPMUGRh6DBaT9kxKv+XibWsEtznqwrEdrtH5oMSII=; h=From:To:Cc:Subject:Date:From; b=fgGyo5D/OU8YFpNFmdkSkMTK7NvCIx+XCVFHdp/85sOY/yAjXjf8614zpuf5cQ8au 80eyAlcpaZM3K8xxioDT5UUB51pzX1OuebVObjdP4640izbZw1Cc0gWaCzmCoaPFgo eBqrTrkGZh7cArFMudC4fFwAitJZrzijmdVCO0pR4kq6Qmg6cnoO7/8PElNpsb6rs1 P34/Q01DBb9Z2wWxaZjLCFLIqkVXmoOhCK9OJNNAWMcpsHibfcb1HR0GgHcoB/fgyZ wKNqxe4N2ojt3qMVsAYefj+hfXe/YGBGVj7IJzXG1v9dF6L0XOyfsWQsp4NAh/ykN0 0cTBCW793CmnA== 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 4.95) (envelope-from ) id 1rOzr5-00BYt6-Dt; Sun, 14 Jan 2024 12:44:47 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Thomas Gleixner , Lorenzo Pieralisi Subject: [PATCH] irqchip/gic-v3-its: Handle non-coherent GICv4 redistributors Date: Sun, 14 Jan 2024 12:44:29 +0000 Message-Id: <20240114124429.2433890-1-maz@kernel.org> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, lpieralisi@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-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240114_044459_611853_E9477DCB X-CRM114-Status: GOOD ( 15.53 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Although the GICv3 code base has gained some handling of systems failing to handle the shareability attributes, the GICv4 side of things has been firmly ignored. This is unfortunate, as the new recent addition of the "dma-noncoherent" is supposed to apply to all of the GICR tables, and not just the ones that are common to v3 and v4. Add some checks to handle the VPROPBASE/VPENDBASE shareability and cacheability attributes in the same way we deal with the other GICR_BASE registers, wrapping the flag check in a helper for improved readability. Note that this has been found by inspection only, as I don't have access to HW that suffers from this particular issue. Fixes: 3a0fff0fb6a3 ("irqchip/gic-v3: Enable non-coherent redistributors/ITSes DT probing") Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-gic-v3-its.c | 37 +++++++++++++++++++++----------- 1 file changed, 25 insertions(+), 12 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 9a7a74239eab..bdc2c8330479 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -207,6 +207,11 @@ static bool require_its_list_vmovp(struct its_vm *vm, struct its_node *its) return (gic_rdists->has_rvpeid || vm->vlpi_count[its->list_nr]); } +static bool rdists_support_shareable(void) +{ + return !(gic_rdists->flags & RDIST_FLAGS_FORCE_NON_SHAREABLE); +} + static u16 get_its_list(struct its_vm *vm) { struct its_node *its; @@ -2710,10 +2715,12 @@ static u64 inherit_vpe_l1_table_from_its(void) break; } val |= FIELD_PREP(GICR_VPROPBASER_4_1_ADDR, addr >> 12); - val |= FIELD_PREP(GICR_VPROPBASER_SHAREABILITY_MASK, - FIELD_GET(GITS_BASER_SHAREABILITY_MASK, baser)); - val |= FIELD_PREP(GICR_VPROPBASER_INNER_CACHEABILITY_MASK, - FIELD_GET(GITS_BASER_INNER_CACHEABILITY_MASK, baser)); + if (rdists_support_shareable()) { + val |= FIELD_PREP(GICR_VPROPBASER_SHAREABILITY_MASK, + FIELD_GET(GITS_BASER_SHAREABILITY_MASK, baser)); + val |= FIELD_PREP(GICR_VPROPBASER_INNER_CACHEABILITY_MASK, + FIELD_GET(GITS_BASER_INNER_CACHEABILITY_MASK, baser)); + } val |= FIELD_PREP(GICR_VPROPBASER_4_1_SIZE, GITS_BASER_NR_PAGES(baser) - 1); return val; @@ -2936,8 +2943,10 @@ static int allocate_vpe_l1_table(void) WARN_ON(!IS_ALIGNED(pa, psz)); val |= FIELD_PREP(GICR_VPROPBASER_4_1_ADDR, pa >> 12); - val |= GICR_VPROPBASER_RaWb; - val |= GICR_VPROPBASER_InnerShareable; + if (rdists_support_shareable()) { + val |= GICR_VPROPBASER_RaWb; + val |= GICR_VPROPBASER_InnerShareable; + } val |= GICR_VPROPBASER_4_1_Z; val |= GICR_VPROPBASER_4_1_VALID; @@ -3126,7 +3135,7 @@ static void its_cpu_init_lpis(void) gicr_write_propbaser(val, rbase + GICR_PROPBASER); tmp = gicr_read_propbaser(rbase + GICR_PROPBASER); - if (gic_rdists->flags & RDIST_FLAGS_FORCE_NON_SHAREABLE) + if (!rdists_support_shareable()) tmp &= ~GICR_PROPBASER_SHAREABILITY_MASK; if ((tmp ^ val) & GICR_PROPBASER_SHAREABILITY_MASK) { @@ -3153,7 +3162,7 @@ static void its_cpu_init_lpis(void) gicr_write_pendbaser(val, rbase + GICR_PENDBASER); tmp = gicr_read_pendbaser(rbase + GICR_PENDBASER); - if (gic_rdists->flags & RDIST_FLAGS_FORCE_NON_SHAREABLE) + if (!rdists_support_shareable()) tmp &= ~GICR_PENDBASER_SHAREABILITY_MASK; if (!(tmp & GICR_PENDBASER_SHAREABILITY_MASK)) { @@ -3880,14 +3889,18 @@ static void its_vpe_schedule(struct its_vpe *vpe) val = virt_to_phys(page_address(vpe->its_vm->vprop_page)) & GENMASK_ULL(51, 12); val |= (LPI_NRBITS - 1) & GICR_VPROPBASER_IDBITS_MASK; - val |= GICR_VPROPBASER_RaWb; - val |= GICR_VPROPBASER_InnerShareable; + if (rdists_support_shareable()) { + val |= GICR_VPROPBASER_RaWb; + val |= GICR_VPROPBASER_InnerShareable; + } gicr_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); val = virt_to_phys(page_address(vpe->vpt_page)) & GENMASK_ULL(51, 16); - val |= GICR_VPENDBASER_RaWaWb; - val |= GICR_VPENDBASER_InnerShareable; + if (rdists_support_shareable()) { + val |= GICR_VPENDBASER_RaWaWb; + val |= GICR_VPENDBASER_InnerShareable; + } /* * There is no good way of finding out if the pending table is * empty as we can race against the doorbell interrupt very -- 2.39.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel