Message ID | 20201101131430.257038-3-maz@kernel.org (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604236481; bh=soTWofQsk5mAYc7LD8rgr4LwuCJPqqvnbnjj2BQ4Lv4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AbpPC3jRJtGUDsrBTIs6vU0uxT6b0XugBZTWp8j4H4QtNMnPyx5bDQzydbpWjg/Sq BWkYF1nVVXQF27UHiZF5a2Hbzu9O6inWTGx4le9kUnPDV5s87fMkz7fa/FQYtIbT7R 2teNNNDk8PjUWorTLv/7TtppX7JA2JLu4HlOxdoU= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from <maz@kernel.org>) id 1kZDBv-006QYT-8i; Sun, 01 Nov 2020 13:14:39 +0000 From: Marc Zyngier <maz@kernel.org> To: LAK <linux-arm-kernel@lists.infradead.org>, linux-kernel <linux-kernel@vger.kernel.org> Subject: [PATCH 2/2] arm64: Mark the recheduling IPI as naked interrupt Date: Sun, 1 Nov 2020 13:14:30 +0000 Message-Id: <20201101131430.257038-3-maz@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201101131430.257038-1-maz@kernel.org> References: <20201101131430.257038-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, will@kernel.org, catalin.marinas@arm.com, tglx@linutronix.de, Valentin.Schneider@arm.com, peterz@infradead.org, kernel-team@android.com 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-20201101_081441_806478_D2D7529A X-CRM114-Status: GOOD ( 14.09 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: <linux-arm-kernel.lists.infradead.org> List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-arm-kernel>, <mailto:linux-arm-kernel-request@lists.infradead.org?subject=unsubscribe> List-Archive: <http://lists.infradead.org/pipermail/linux-arm-kernel/> List-Post: <mailto:linux-arm-kernel@lists.infradead.org> List-Help: <mailto:linux-arm-kernel-request@lists.infradead.org?subject=help> List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-arm-kernel>, <mailto:linux-arm-kernel-request@lists.infradead.org?subject=subscribe> Cc: Will Deacon <will@kernel.org>, Peter Zijlstra <peterz@infradead.org>, Catalin Marinas <catalin.marinas@arm.com>, Thomas Gleixner <tglx@linutronix.de>, Android Kernel Team <kernel-team@android.com>, Valentin Schneider <Valentin.Schneider@arm.com> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org |
Series |
arm64: Allow the rescheduling IPI to bypass irq_enter/exit
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expand
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diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 82e75fc2c903..6c11be3e74d3 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -993,6 +993,10 @@ void __init set_smp_ipi_range(int ipi_base, int n) ipi_desc[i] = irq_to_desc(ipi_base + i); irq_set_status_flags(ipi_base + i, IRQ_HIDDEN); + + /* The recheduling IPI is special... */ + if (i == IPI_RESCHEDULE) + irq_set_status_flags(ipi_base + i, IRQ_NAKED); } ipi_irq_base = ipi_base;
Flag the rescheduling IPI as 'naked', making sure such interrupt doesn't trigger a rescheduling event by itself. Signed-off-by: Marc Zyngier <maz@kernel.org> --- arch/arm64/kernel/smp.c | 4 ++++ 1 file changed, 4 insertions(+)