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 6FCD5C433FE for ; Sun, 13 Nov 2022 16:39:59 +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:References:In-Reply-To: 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: List-Owner; bh=KjCK7M1dVGdAiGT1HIYhdcufL0FzmlmuwSDNuyb+Btw=; b=NAYSlA59u8j+S3 DpDX/UmUHXXG5Zd6q5nyTQYCpzwB0iuBoPvnnh/f/jzVZloZn4Dr4Nm35ES1sBKOqHZw04+45uCgn UkNkpFVwV3mMknCXaKMCWFgrmisq8+AnZGCLdKg8p+6T68oL7Lh0lRFOTGxHFTA4LnQvIcyaUlAzU SeEMJerins2tPPkj+/c7bajXwTiXHS0dK034rs6z0FjCv5KTG2NFAvudngFETwwxosFwyrXfX8bUW bjR0MZ2eQJVPIO3ErCwN9oVbqeDxrF/WAfPmkzGTQH9OtEJLqcFHBtUtkbbU+itZ8kt93JKlnmDin Uq68ZpCP1JPDfMyEzDqQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ouG0Z-00CNba-DE; Sun, 13 Nov 2022 16:39:00 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ouG0S-00CNXn-Ke for linux-arm-kernel@lists.infradead.org; Sun, 13 Nov 2022 16:38:54 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id BA91D60C2E; Sun, 13 Nov 2022 16:38:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 26C9DC433D6; Sun, 13 Nov 2022 16:38:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668357530; bh=uaCgmifIBreXTDUwTirUoI4xpqLPVdzhNNhrEj8Q19k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EPwBQ4001rAEaZ18/JxctwXqxfuPJT1Zv9dkjEytDu4tLM2cnjHgqMSOe6TroqiwH xZ/vfQfk+DDV3MJnFWnzy4HxRrHEA5H7u8g1OjooDl4HvBDHaVwWRVip2qt+gCX0CC cTzXX3X+BWyK2toowjqDmRjt2dz2ITX8CFEYfY1LZzOwY4N7kuYTtOnYFlvUmVX0GI yL5TQT3YI/GGXQuhwgKWu6i6sXjBahH6pEFhPPHT45fh7t4a51fiTirYR5ltUPvK+4 f0ysEzdj26RwqGTUoB9gD6eyOdDZo5aEsrL0he5dHrrlGN92l+DMV9sOKAAut5kIDo xQ3OymB6y4qRQ== 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 1ouG0O-005oYZ-CT; Sun, 13 Nov 2022 16:38:48 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, , , kvm@vger.kernel.org Cc: James Morse , Suzuki K Poulose , Alexandru Elisei , Oliver Upton , Ricardo Koller , Reiji Watanabe Subject: [PATCH v4 03/16] KVM: arm64: PMU: Always advertise the CHAIN event Date: Sun, 13 Nov 2022 16:38:19 +0000 Message-Id: <20221113163832.3154370-4-maz@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221113163832.3154370-1-maz@kernel.org> References: <20221113163832.3154370-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvmarm@lists.linux.dev, kvm@vger.kernel.org, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, oliver.upton@linux.dev, ricarkol@google.com, reijiw@google.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-20221113_083852_744207_D409E0D1 X-CRM114-Status: GOOD ( 12.15 ) 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 Even when the underlying HW doesn't offer the CHAIN event (which happens with QEMU), we can always support it as we're in control of the counter overflow. Always advertise the event via PMCEID0_EL0. Reviewed-by: Reiji Watanabe Signed-off-by: Marc Zyngier --- arch/arm64/kvm/pmu-emul.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/kvm/pmu-emul.c b/arch/arm64/kvm/pmu-emul.c index 57765be69bea..69b67ab3c4bf 100644 --- a/arch/arm64/kvm/pmu-emul.c +++ b/arch/arm64/kvm/pmu-emul.c @@ -701,6 +701,8 @@ u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1) if (!pmceid1) { val = read_sysreg(pmceid0_el0); + /* always support CHAIN */ + val |= BIT(ARMV8_PMUV3_PERFCTR_CHAIN); base = 0; } else { val = read_sysreg(pmceid1_el0); -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel