From patchwork Wed Aug 2 17:01:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Philippe Brucker X-Patchwork-Id: 13338571 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 520E5C04E69 for ; Wed, 2 Aug 2023 17:04:03 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qRFEk-0000SR-AR; Wed, 02 Aug 2023 13:02:14 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qRFEj-0000Qf-1N for qemu-devel@nongnu.org; Wed, 02 Aug 2023 13:02:13 -0400 Received: from mail-wm1-x32a.google.com ([2a00:1450:4864:20::32a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qRFEf-0003V6-30 for qemu-devel@nongnu.org; Wed, 02 Aug 2023 13:02:12 -0400 Received: by mail-wm1-x32a.google.com with SMTP id 5b1f17b1804b1-3fbc59de009so645215e9.3 for ; Wed, 02 Aug 2023 10:02:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1690995728; x=1691600528; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=WLjLyC8gD2fbH6jSf2NcFADaJFvM1nR5WGv252TlLAM=; b=fcT2NSQnqa5UWIRu65XaIsC3/04BInHoxpquOW/rauceV37IGp7JpeHXi4C+EvMwCO fy38Ocettnl5UTbflIKu38oafEbcJNMjxgKkz80GK08DQzQ6wvM1rL35UqgmSmSJCTAt dC67ocvJ0ZEJJMqJivqTxGXQ+dFDSBgzF1n2Es3MCEBKHNshniRdIuL79J520BEPXaIg W1pCO1gVRshHFv7NAGZeOr7PNtfW09tj9ShPQwfBPyqBzn5UN81l5KKM5syou6LYROgR ch6LINKb1XSs8WfVQ+t87jPZRooC3XxpcHUnN57AivKSYEgoVQ80Tidg4cWlHT7DRBeD EP3A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690995728; x=1691600528; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=WLjLyC8gD2fbH6jSf2NcFADaJFvM1nR5WGv252TlLAM=; b=jjjhf22baY68tEkJSeitCb4XK/lijfory89DPMbwPlCOhK0Bey5/QtSYxBTkCHKWEJ cggwWsqmHAqlAGXkRQ2bQqU0++U7tEj1JAjGcleKfMwZVBuPzWmHb+fAwJoyFZluPRsR rFXrVOd++JWbsk8A7j8UGLXvW/d4GceRKLx5fMtu5G/jAryoebiVk20aiNCFcByq5dyE B5hnRmBVQ145dOlX353h1oy8o2ThWg2gbjTH6bM4tJ2CPDuBJpaUI22ocZF740EQ3LM+ 1F1TEDV1W9juT2ifANmFOXSq3RZD7557oKvONpEO2yjZTNxPGsgLadIpGV6oZhj0ddGx 71Sg== X-Gm-Message-State: ABy/qLZkG/feUTsdf0GkNjFFKc5mPVWQNcEHSKbc+rPW1XHA9PMgSiGF InN2KBtMbcKui7LQPWT40A475w== X-Google-Smtp-Source: APBJJlGV+a0PpLBNbIdxPgG2WMuPdej3EWOnDRogvzoX5lglwabl8EBoEHAX4lFLa0V9yU+MWB4qxA== X-Received: by 2002:a7b:c5d9:0:b0:3f7:678c:74b0 with SMTP id n25-20020a7bc5d9000000b003f7678c74b0mr5514907wmk.12.1690995727720; Wed, 02 Aug 2023 10:02:07 -0700 (PDT) Received: from localhost.localdomain ([2.219.138.198]) by smtp.gmail.com with ESMTPSA id q7-20020a1cf307000000b003fa98908014sm2149081wmq.8.2023.08.02.10.02.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Aug 2023 10:02:07 -0700 (PDT) From: Jean-Philippe Brucker To: peter.maydell@linaro.org Cc: richard.henderson@linaro.org, qemu-arm@nongnu.org, qemu-devel@nongnu.org, Jean-Philippe Brucker Subject: [PATCH v2 6/6] target/arm/helper: Implement CNTHCTL_EL2.CNT[VP]MASK Date: Wed, 2 Aug 2023 18:01:57 +0100 Message-ID: <20230802170157.401491-7-jean-philippe@linaro.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230802170157.401491-1-jean-philippe@linaro.org> References: <20230802170157.401491-1-jean-philippe@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::32a; envelope-from=jean-philippe@linaro.org; helo=mail-wm1-x32a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org When FEAT_RME is implemented, these bits override the value of CNT[VP]_CTL_EL0.IMASK in Realm and Root state. Move the IRQ state update into a new gt_update_irq() function and test those bits every time we recompute the IRQ state. Since we're removing the IRQ state from some trace events, add a new trace event for gt_update_irq(). Signed-off-by: Jean-Philippe Brucker --- target/arm/cpu.h | 3 +++ target/arm/helper.c | 54 ++++++++++++++++++++++++++++++++--------- target/arm/trace-events | 7 +++--- 3 files changed, 50 insertions(+), 14 deletions(-) diff --git a/target/arm/cpu.h b/target/arm/cpu.h index bcd65a63ca..bedc7ec6dc 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -1743,6 +1743,9 @@ static inline void xpsr_write(CPUARMState *env, uint32_t val, uint32_t mask) #define HSTR_TTEE (1 << 16) #define HSTR_TJDBX (1 << 17) +#define CNTHCTL_CNTVMASK (1 << 18) +#define CNTHCTL_CNTPMASK (1 << 19) + /* Return the current FPSCR value. */ uint32_t vfp_get_fpscr(CPUARMState *env); void vfp_set_fpscr(CPUARMState *env, uint32_t val); diff --git a/target/arm/helper.c b/target/arm/helper.c index 77dd80ad28..68e915ddda 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -2608,6 +2608,28 @@ static uint64_t gt_get_countervalue(CPUARMState *env) return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / gt_cntfrq_period_ns(cpu); } +static void gt_update_irq(ARMCPU *cpu, int timeridx) +{ + CPUARMState *env = &cpu->env; + uint64_t cnthctl = env->cp15.cnthctl_el2; + ARMSecuritySpace ss = arm_security_space(env); + /* ISTATUS && !IMASK */ + int irqstate = (env->cp15.c14_timer[timeridx].ctl & 6) == 4; + + /* + * If bit CNTHCTL_EL2.CNT[VP]MASK is set, it overrides IMASK. + * It is RES0 in Secure and NonSecure state. + */ + if ((ss == ARMSS_Root || ss == ARMSS_Realm) && + ((timeridx == GTIMER_VIRT && (cnthctl & CNTHCTL_CNTVMASK)) || + (timeridx == GTIMER_PHYS && (cnthctl & CNTHCTL_CNTPMASK)))) { + irqstate = 0; + } + + qemu_set_irq(cpu->gt_timer_outputs[timeridx], irqstate); + trace_arm_gt_update_irq(timeridx, irqstate); +} + static void gt_recalc_timer(ARMCPU *cpu, int timeridx) { ARMGenericTimer *gt = &cpu->env.cp15.c14_timer[timeridx]; @@ -2623,13 +2645,9 @@ static void gt_recalc_timer(ARMCPU *cpu, int timeridx) /* Note that this must be unsigned 64 bit arithmetic: */ int istatus = count - offset >= gt->cval; uint64_t nexttick; - int irqstate; gt->ctl = deposit32(gt->ctl, 2, 1, istatus); - irqstate = (istatus && !(gt->ctl & 2)); - qemu_set_irq(cpu->gt_timer_outputs[timeridx], irqstate); - if (istatus) { /* Next transition is when count rolls back over to zero */ nexttick = UINT64_MAX; @@ -2648,14 +2666,14 @@ static void gt_recalc_timer(ARMCPU *cpu, int timeridx) } else { timer_mod(cpu->gt_timer[timeridx], nexttick); } - trace_arm_gt_recalc(timeridx, irqstate, nexttick); + trace_arm_gt_recalc(timeridx, nexttick); } else { /* Timer disabled: ISTATUS and timer output always clear */ gt->ctl &= ~4; - qemu_set_irq(cpu->gt_timer_outputs[timeridx], 0); timer_del(cpu->gt_timer[timeridx]); trace_arm_gt_recalc_disabled(timeridx); } + gt_update_irq(cpu, timeridx); } static void gt_timer_reset(CPUARMState *env, const ARMCPRegInfo *ri, @@ -2759,10 +2777,8 @@ static void gt_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri, * IMASK toggled: don't need to recalculate, * just set the interrupt line based on ISTATUS */ - int irqstate = (oldval & 4) && !(value & 2); - - trace_arm_gt_imask_toggle(timeridx, irqstate); - qemu_set_irq(cpu->gt_timer_outputs[timeridx], irqstate); + trace_arm_gt_imask_toggle(timeridx); + gt_update_irq(cpu, timeridx); } } @@ -2888,6 +2904,21 @@ static void gt_virt_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri, gt_ctl_write(env, ri, GTIMER_VIRT, value); } +static void gt_cnthctl_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = env_archcpu(env); + uint32_t oldval = env->cp15.cnthctl_el2; + + raw_write(env, ri, value); + + if ((oldval ^ value) & CNTHCTL_CNTVMASK) { + gt_update_irq(cpu, GTIMER_VIRT); + } else if ((oldval ^ value) & CNTHCTL_CNTPMASK) { + gt_update_irq(cpu, GTIMER_PHYS); + } +} + static void gt_cntvoff_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) { @@ -6200,7 +6231,8 @@ static const ARMCPRegInfo el2_cp_reginfo[] = { * reset values as IMPDEF. We choose to reset to 3 to comply with * both ARMv7 and ARMv8. */ - .access = PL2_RW, .resetvalue = 3, + .access = PL2_RW, .type = ARM_CP_IO, .resetvalue = 3, + .writefn = gt_cnthctl_write, .fieldoffset = offsetof(CPUARMState, cp15.cnthctl_el2) }, { .name = "CNTVOFF_EL2", .state = ARM_CP_STATE_AA64, .opc0 = 3, .opc1 = 4, .crn = 14, .crm = 0, .opc2 = 3, diff --git a/target/arm/trace-events b/target/arm/trace-events index 2a0ba7bffc..48cc0512db 100644 --- a/target/arm/trace-events +++ b/target/arm/trace-events @@ -1,13 +1,14 @@ # See docs/devel/tracing.rst for syntax documentation. # helper.c -arm_gt_recalc(int timer, int irqstate, uint64_t nexttick) "gt recalc: timer %d irqstate %d next tick 0x%" PRIx64 -arm_gt_recalc_disabled(int timer) "gt recalc: timer %d irqstate 0 timer disabled" +arm_gt_recalc(int timer, uint64_t nexttick) "gt recalc: timer %d next tick 0x%" PRIx64 +arm_gt_recalc_disabled(int timer) "gt recalc: timer %d timer disabled" arm_gt_cval_write(int timer, uint64_t value) "gt_cval_write: timer %d value 0x%" PRIx64 arm_gt_tval_write(int timer, uint64_t value) "gt_tval_write: timer %d value 0x%" PRIx64 arm_gt_ctl_write(int timer, uint64_t value) "gt_ctl_write: timer %d value 0x%" PRIx64 -arm_gt_imask_toggle(int timer, int irqstate) "gt_ctl_write: timer %d IMASK toggle, new irqstate %d" +arm_gt_imask_toggle(int timer) "gt_ctl_write: timer %d IMASK toggle" arm_gt_cntvoff_write(uint64_t value) "gt_cntvoff_write: value 0x%" PRIx64 +arm_gt_update_irq(int timer, int irqstate) "gt_update_irq: timer %d irqstate %d" # kvm.c kvm_arm_fixup_msi_route(uint64_t iova, uint64_t gpa) "MSI iova = 0x%"PRIx64" is translated into 0x%"PRIx64