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 X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 59842C33CA9 for ; Mon, 13 Jan 2020 17:31:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2680E206DA for ; Mon, 13 Jan 2020 17:31:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="NGegURhW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728656AbgAMRba (ORCPT ); Mon, 13 Jan 2020 12:31:30 -0500 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:53118 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727726AbgAMRba (ORCPT ); Mon, 13 Jan 2020 12:31:30 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1578936688; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=GEBUDqgM3gGBMdV6rvvSSOuZuUWDxugabavxa54G2Vg=; b=NGegURhWWn0YD9lif458ntfbu3ZcyeOFy8exy7jaxapiwg8POa6uoi5z/ds/1tzz8ZQIGM 1hVZbkFQ9wY2KrgR+eNOk5CbIn+Vtx0MBKA6//vNlwniWx5JGmytuNieyn6hxYwCwlpMm6 i1pI5n8z9G3qDI6BRdyKZDFpwoEYbhI= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-438-1XCR-LcoPaekVf8yIqT8Lw-1; Mon, 13 Jan 2020 12:31:24 -0500 X-MC-Unique: 1XCR-LcoPaekVf8yIqT8Lw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 520648024CC; Mon, 13 Jan 2020 17:31:21 +0000 (UTC) Received: from kamzik.brq.redhat.com (unknown [10.43.2.160]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 0332C10841ED; Mon, 13 Jan 2020 17:31:16 +0000 (UTC) Date: Mon, 13 Jan 2020 18:31:14 +0100 From: Andrew Jones To: Eric Auger Cc: eric.auger.pro@gmail.com, maz@kernel.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, qemu-devel@nongnu.org, qemu-arm@nongnu.org, andre.przywara@arm.com, peter.maydell@linaro.org, yuzenghui@huawei.com, alexandru.elisei@arm.com, thuth@redhat.com Subject: Re: [kvm-unit-tests PATCH v2 07/16] arm/arm64: ITS: Set the LPI config and pending tables Message-ID: <20200113173114.4cjfqebzrfb7iepg@kamzik.brq.redhat.com> References: <20200110145412.14937-1-eric.auger@redhat.com> <20200110145412.14937-8-eric.auger@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200110145412.14937-8-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Fri, Jan 10, 2020 at 03:54:03PM +0100, Eric Auger wrote: > Allocate the LPI configuration and per re-distributor pending table. > Set redistributor's PROPBASER and PENDBASER. The LPIs are enabled > by default in the config table. > > Also introduce a helper routine that allows to set the pending table > bit for a given LPI. > > Signed-off-by: Eric Auger > > --- > > v1 -> v2: > - remove memory attributes > --- > lib/arm/asm/gic-v3-its.h | 3 ++ > lib/arm/asm/gic-v3.h | 12 ++++++++ > lib/arm/gic-v3-its.c | 60 ++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 75 insertions(+) > > diff --git a/lib/arm/asm/gic-v3-its.h b/lib/arm/asm/gic-v3-its.h > index 5a4dfe9..2f8b8f1 100644 > --- a/lib/arm/asm/gic-v3-its.h > +++ b/lib/arm/asm/gic-v3-its.h > @@ -90,6 +90,9 @@ extern void its_init(void); > extern int its_parse_baser(int i, struct its_baser *baser); > extern void its_setup_baser(int i, struct its_baser *baser); > extern struct its_baser *its_lookup_baser(int type); > +extern void set_lpi_config(int n, u8 val); > +extern u8 get_lpi_config(int n); > +extern void set_pending_table_bit(int rdist, int n, bool set); Please prefix with 'its' or at least swap the 'lpi' and verb. E.g. lpi_set_config, its_set_pending_table_bit. > > #endif /* !__ASSEMBLY__ */ > #endif /* _ASMARM_GIC_V3_ITS_H_ */ > diff --git a/lib/arm/asm/gic-v3.h b/lib/arm/asm/gic-v3.h > index ffb2e26..90a7304 100644 > --- a/lib/arm/asm/gic-v3.h > +++ b/lib/arm/asm/gic-v3.h > @@ -48,6 +48,16 @@ > #define MPIDR_TO_SGI_AFFINITY(cluster_id, level) \ > (MPIDR_AFFINITY_LEVEL(cluster_id, level) << ICC_SGI1R_AFFINITY_## level ## _SHIFT) > > +#define GICR_PROPBASER_IDBITS_MASK (0x1f) > + > +#define GICR_PENDBASER_PTZ BIT_ULL(62) > + > +#define LPI_PROP_GROUP1 (1 << 1) > +#define LPI_PROP_ENABLED (1 << 0) > +#define LPI_PROP_DEFAULT_PRIO 0xa0 > +#define LPI_PROP_DEFAULT (LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1 | \ > + LPI_PROP_ENABLED) > + > #include > > #ifndef __ASSEMBLY__ > @@ -64,6 +74,8 @@ struct gicv3_data { > void *dist_base; > void *redist_bases[GICV3_NR_REDISTS]; > void *redist_base[NR_CPUS]; > + void *lpi_prop; > + void *lpi_pend[NR_CPUS]; > unsigned int irq_nr; > }; > extern struct gicv3_data gicv3_data; > diff --git a/lib/arm/gic-v3-its.c b/lib/arm/gic-v3-its.c > index 79946c3..6c97569 100644 > --- a/lib/arm/gic-v3-its.c > +++ b/lib/arm/gic-v3-its.c > @@ -117,3 +117,63 @@ void its_setup_baser(int i, struct its_baser *baser) > writeq(val, gicv3_its_base() + GITS_BASER + i * 8); > } > > +inline void set_lpi_config(int n, u8 value) > +{ > + u8 *entry = (u8 *)(gicv3_data.lpi_prop + (n - 8192)); > + *entry = value; > +} > + > +inline u8 get_lpi_config(int n) > +{ > + u8 *entry = (u8 *)(gicv3_data.lpi_prop + (n - 8192)); > + return *entry; > +} Probably don't need the 'inline', but ok. > + > +/* alloc_lpi_tables: Allocate LPI config and pending tables */ > +void alloc_lpi_tables(void); > +void alloc_lpi_tables(void) Why not add this to the header (renamed to lpi_alloc_tables)? Or should this function be static? > +{ > + unsigned long n = SZ_64K >> PAGE_SHIFT; > + unsigned long order = fls(n); > + u64 prop_val; > + int cpu; > + > + gicv3_data.lpi_prop = (void *)virt_to_phys(alloc_pages(order)); > + > + /* ID bits = 13, ie. up to 14b LPI INTID */ > + prop_val = (u64)gicv3_data.lpi_prop | 13; > + > + /* > + * Allocate pending tables for each redistributor > + * and set PROPBASER and PENDBASER > + */ > + for_each_present_cpu(cpu) { > + u64 pend_val; > + void *ptr; > + > + ptr = gicv3_data.redist_base[cpu]; > + > + writeq(prop_val, ptr + GICR_PROPBASER); > + > + gicv3_data.lpi_pend[cpu] = > + (void *)virt_to_phys(alloc_pages(order)); nit: I think these line brakes on = or worse than going over 80 chars. And, you don't need to worry about 80 chars anyway. See the README, we allow 120. > + > + pend_val = (u64)gicv3_data.lpi_pend[cpu]; > + > + writeq(pend_val, ptr + GICR_PENDBASER); > + } > +} > + > +void set_pending_table_bit(int rdist, int n, bool set) > +{ > + u8 *ptr = phys_to_virt((phys_addr_t)gicv3_data.lpi_pend[rdist]); > + u8 mask = 1 << (n % 8), byte; > + > + ptr += (n / 8); > + byte = *ptr; > + if (set) > + byte |= mask; > + else > + byte &= ~mask; > + *ptr = byte; > +} > -- > 2.20.1 > Thanks, drew