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=-8.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 B340EC761A8 for ; Tue, 23 Jul 2019 14:28:18 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 8BE7622543 for ; Tue, 23 Jul 2019 14:28:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="G+oNnW1u" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8BE7622543 Authentication-Results: mail.kernel.org; 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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hpvm5-0001Sf-V1; Tue, 23 Jul 2019 14:28:17 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hpvm3-0001SB-9R for linux-arm-kernel@lists.infradead.org; Tue, 23 Jul 2019 14:28:16 +0000 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 73B5C28; Tue, 23 Jul 2019 07:28:13 -0700 (PDT) Received: from [10.1.197.61] (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 1B5DF3F71F; Tue, 23 Jul 2019 07:28:13 -0700 (PDT) Subject: Re: [BOOTWRAPPER][PATCH] Make GICv3.1 extended ranges available to non-secure To: Mark Rutland References: <20190723115545.1506-1-marc.zyngier@arm.com> <20190723141017.GB5004@lakrids.cambridge.arm.com> From: Marc Zyngier Openpgp: preference=signencrypt Autocrypt: addr=marc.zyngier@arm.com; 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Linux aarch64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <20190723141017.GB5004@lakrids.cambridge.arm.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190723_072815_419324_B328AF8E X-CRM114-Status: GOOD ( 19.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 23/07/2019 15:10, Mark Rutland wrote: > Hi Marc, > > On Tue, Jul 23, 2019 at 12:55:45PM +0100, Marc Zyngier wrote: >> If we have a GICv3.1-capable system, configure the EPPI/ESPI ranges >> to be accessible from the non-secure world. >> >> Signed-off-by: Marc Zyngier >> --- >> gic-v3.c | 14 ++++++++++++-- >> 1 file changed, 12 insertions(+), 2 deletions(-) >> >> diff --git a/gic-v3.c b/gic-v3.c >> index 476f703..4b733ba 100644 >> --- a/gic-v3.c >> +++ b/gic-v3.c >> @@ -17,6 +17,8 @@ >> #define GICD_TYPER 0x4 >> #define GICD_IGROUP0 0x80 >> #define GICD_IGRPMOD0 0xd00 >> +#define GICD_IGROUPR0E 0x1000 >> +#define GICD_IGRPMODR0E 0x3400 >> >> #define GICD_CTLR_EnableGrp0 (1 << 0) >> #define GICD_CTLR_EnableGrp1ns (1 << 1) >> @@ -57,6 +59,7 @@ void gic_secure_init_primary(void) >> * ChildrenAsleep to be 0. >> */ >> uint32_t waker = raw_readl(gicr_ptr + GICR_WAKER); >> + uint32_t regs; >> waker &= ~GICR_WAKER_ProcessorSleep; >> raw_writel(waker, gicr_ptr + GICR_WAKER); >> dsb(st); >> @@ -72,8 +75,11 @@ void gic_secure_init_primary(void) >> typer = raw_readl(gicr_ptr + GICR_TYPER); >> >> gicr_ptr += 0x10000; /* Go to SGI_Base */ >> - raw_writel(~0x0, gicr_ptr + GICR_IGROUP0); >> - raw_writel(0x0, gicr_ptr + GICR_IGRPMOD0); >> + regs = 1 + ((typer >> 27) & 0x1f); > > IIUC that's GICR_TYPER.PPInum, right? Indeed. > >> + for (i = 0; i < regs; i++) { >> + raw_writel(~0x0, gicr_ptr + GICR_IGROUP0 + i * 4); >> + raw_writel(0x0, gicr_ptr + GICR_IGRPMOD0 + i * 4); >> + } >> >> /* Next redist */ >> gicr_ptr += 0x10000; >> @@ -87,6 +93,10 @@ void gic_secure_init_primary(void) >> raw_writel(~0x0, gicd_base + GICD_IGROUP0 + i * 4); >> raw_writel(0x0, gicd_base + GICD_IGRPMOD0 + i * 4); >> } >> + for (i = 0; i < ((typer >> 27) & GICD_TYPER_ITLineNumber); i++) { > > IIUC this is ESPI_range_field, so using the GICD_TYPER_ITLineNumber > mnemonic is a bit misleading. > > Given the verbose regfield names, _SHIFT and _MASK definitions will make > this illegible, so could we please add extactors: > > #define GICR_TYPER_PPInum(r) (((r) >> 27) & 0x1f) > #define GICD_TYPER_ESPI_range(r) (((r) >> 27) & 0x1f) > > ... and use those in the for loops? > > With that, this looks good to me. If you respin, I'm happy to pick this > up. :) Sure, I'll do that shortly. Thanks, M. -- Jazz is not dead. It just smells funny... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel