From patchwork Wed May 5 07:43:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Orzel X-Patchwork-Id: 12239251 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 1A124C433B4 for ; Wed, 5 May 2021 07:43:43 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 ACE6A61177 for ; Wed, 5 May 2021 07:43:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ACE6A61177 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.122824.231734 (Exim 4.92) (envelope-from ) id 1leCBz-0005ss-Qy; Wed, 05 May 2021 07:43:35 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 122824.231734; Wed, 05 May 2021 07:43:35 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1leCBz-0005sh-LZ; Wed, 05 May 2021 07:43:35 +0000 Received: by outflank-mailman (input) for mailman id 122824; Wed, 05 May 2021 07:43:34 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1leCBy-0005l9-8c for xen-devel@lists.xenproject.org; Wed, 05 May 2021 07:43:34 +0000 Received: from foss.arm.com (unknown [217.140.110.172]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTP id 646ac69b-4168-46e5-9002-ca2397ac07e5; Wed, 05 May 2021 07:43:33 +0000 (UTC) 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 E473411FB; Wed, 5 May 2021 00:43:32 -0700 (PDT) Received: from e123311-lin.arm.com (unknown [10.57.0.42]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 82C083F718; Wed, 5 May 2021 00:43:31 -0700 (PDT) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 646ac69b-4168-46e5-9002-ca2397ac07e5 From: Michal Orzel To: xen-devel@lists.xenproject.org Cc: Stefano Stabellini , Julien Grall , Volodymyr Babchuk , bertrand.marquis@arm.com, wei.chen@arm.com, Julien Grall Subject: [PATCH v3 09/10] arm/time,vtimer: Get rid of READ/WRITE_SYSREG32 Date: Wed, 5 May 2021 09:43:07 +0200 Message-Id: <20210505074308.11016-10-michal.orzel@arm.com> X-Mailer: git-send-email 2.29.0 In-Reply-To: <20210505074308.11016-1-michal.orzel@arm.com> References: <20210505074308.11016-1-michal.orzel@arm.com> MIME-Version: 1.0 AArch64 registers are 64bit whereas AArch32 registers are 32bit or 64bit. MSR/MRS are expecting 64bit values thus we should get rid of helpers READ/WRITE_SYSREG32 in favour of using READ/WRITE_SYSREG. We should also use register_t type when reading sysregs which can correspond to uint64_t or uint32_t. Even though many AArch64 registers have upper 32bit reserved it does not mean that they can't be widen in the future. Modify type of vtimer structure's member: ctl to register_t. Add macro CNTFRQ_MASK containing mask for timer clock frequency field of CNTFRQ_EL0 register. Modify CNTx_CTL_* macros to return unsigned long instead of unsigned int as ctl is now of type register_t. Signed-off-by: Michal Orzel Acked-by: Julien Grall --- xen/arch/arm/time.c | 28 ++++++++++++++-------------- xen/arch/arm/vtimer.c | 10 +++++----- xen/include/asm-arm/domain.h | 2 +- xen/include/asm-arm/processor.h | 5 ++++- 4 files changed, 24 insertions(+), 21 deletions(-) diff --git a/xen/arch/arm/time.c b/xen/arch/arm/time.c index b0021c2c69..7dbd363537 100644 --- a/xen/arch/arm/time.c +++ b/xen/arch/arm/time.c @@ -145,7 +145,7 @@ void __init preinit_xen_time(void) preinit_acpi_xen_time(); if ( !cpu_khz ) - cpu_khz = READ_SYSREG32(CNTFRQ_EL0) / 1000; + cpu_khz = (READ_SYSREG(CNTFRQ_EL0) & CNTFRQ_MASK) / 1000; res = platform_init_time(); if ( res ) @@ -205,13 +205,13 @@ int reprogram_timer(s_time_t timeout) if ( timeout == 0 ) { - WRITE_SYSREG32(0, CNTHP_CTL_EL2); + WRITE_SYSREG(0, CNTHP_CTL_EL2); return 1; } deadline = ns_to_ticks(timeout) + boot_count; WRITE_SYSREG64(deadline, CNTHP_CVAL_EL2); - WRITE_SYSREG32(CNTx_CTL_ENABLE, CNTHP_CTL_EL2); + WRITE_SYSREG(CNTx_CTL_ENABLE, CNTHP_CTL_EL2); isb(); /* No need to check for timers in the past; the Generic Timer fires @@ -223,23 +223,23 @@ int reprogram_timer(s_time_t timeout) static void timer_interrupt(int irq, void *dev_id, struct cpu_user_regs *regs) { if ( irq == (timer_irq[TIMER_HYP_PPI]) && - READ_SYSREG32(CNTHP_CTL_EL2) & CNTx_CTL_PENDING ) + READ_SYSREG(CNTHP_CTL_EL2) & CNTx_CTL_PENDING ) { perfc_incr(hyp_timer_irqs); /* Signal the generic timer code to do its work */ raise_softirq(TIMER_SOFTIRQ); /* Disable the timer to avoid more interrupts */ - WRITE_SYSREG32(0, CNTHP_CTL_EL2); + WRITE_SYSREG(0, CNTHP_CTL_EL2); } if ( irq == (timer_irq[TIMER_PHYS_NONSECURE_PPI]) && - READ_SYSREG32(CNTP_CTL_EL0) & CNTx_CTL_PENDING ) + READ_SYSREG(CNTP_CTL_EL0) & CNTx_CTL_PENDING ) { perfc_incr(phys_timer_irqs); /* Signal the generic timer code to do its work */ raise_softirq(TIMER_SOFTIRQ); /* Disable the timer to avoid more interrupts */ - WRITE_SYSREG32(0, CNTP_CTL_EL0); + WRITE_SYSREG(0, CNTP_CTL_EL0); } } @@ -260,8 +260,8 @@ static void vtimer_interrupt(int irq, void *dev_id, struct cpu_user_regs *regs) perfc_incr(virt_timer_irqs); - current->arch.virt_timer.ctl = READ_SYSREG32(CNTV_CTL_EL0); - WRITE_SYSREG32(current->arch.virt_timer.ctl | CNTx_CTL_MASK, CNTV_CTL_EL0); + current->arch.virt_timer.ctl = READ_SYSREG(CNTV_CTL_EL0); + WRITE_SYSREG(current->arch.virt_timer.ctl | CNTx_CTL_MASK, CNTV_CTL_EL0); vgic_inject_irq(current->domain, current, current->arch.virt_timer.irq, true); } @@ -297,9 +297,9 @@ void init_timer_interrupt(void) /* Sensible defaults */ WRITE_SYSREG64(0, CNTVOFF_EL2); /* No VM-specific offset */ /* Do not let the VMs program the physical timer, only read the physical counter */ - WRITE_SYSREG32(CNTHCTL_EL2_EL1PCTEN, CNTHCTL_EL2); - WRITE_SYSREG32(0, CNTP_CTL_EL0); /* Physical timer disabled */ - WRITE_SYSREG32(0, CNTHP_CTL_EL2); /* Hypervisor's timer disabled */ + WRITE_SYSREG(CNTHCTL_EL2_EL1PCTEN, CNTHCTL_EL2); + WRITE_SYSREG(0, CNTP_CTL_EL0); /* Physical timer disabled */ + WRITE_SYSREG(0, CNTHP_CTL_EL2); /* Hypervisor's timer disabled */ isb(); request_irq(timer_irq[TIMER_HYP_PPI], 0, timer_interrupt, @@ -320,8 +320,8 @@ void init_timer_interrupt(void) */ static void deinit_timer_interrupt(void) { - WRITE_SYSREG32(0, CNTP_CTL_EL0); /* Disable physical timer */ - WRITE_SYSREG32(0, CNTHP_CTL_EL2); /* Disable hypervisor's timer */ + WRITE_SYSREG(0, CNTP_CTL_EL0); /* Disable physical timer */ + WRITE_SYSREG(0, CNTHP_CTL_EL2); /* Disable hypervisor's timer */ isb(); release_irq(timer_irq[TIMER_HYP_PPI], NULL); diff --git a/xen/arch/arm/vtimer.c b/xen/arch/arm/vtimer.c index c2b27915c6..167fc6127a 100644 --- a/xen/arch/arm/vtimer.c +++ b/xen/arch/arm/vtimer.c @@ -138,8 +138,8 @@ void virt_timer_save(struct vcpu *v) { ASSERT(!is_idle_vcpu(v)); - v->arch.virt_timer.ctl = READ_SYSREG32(CNTV_CTL_EL0); - WRITE_SYSREG32(v->arch.virt_timer.ctl & ~CNTx_CTL_ENABLE, CNTV_CTL_EL0); + v->arch.virt_timer.ctl = READ_SYSREG(CNTV_CTL_EL0); + WRITE_SYSREG(v->arch.virt_timer.ctl & ~CNTx_CTL_ENABLE, CNTV_CTL_EL0); v->arch.virt_timer.cval = READ_SYSREG64(CNTV_CVAL_EL0); if ( (v->arch.virt_timer.ctl & CNTx_CTL_ENABLE) && !(v->arch.virt_timer.ctl & CNTx_CTL_MASK)) @@ -159,7 +159,7 @@ void virt_timer_restore(struct vcpu *v) WRITE_SYSREG64(v->domain->arch.virt_timer_base.offset, CNTVOFF_EL2); WRITE_SYSREG64(v->arch.virt_timer.cval, CNTV_CVAL_EL0); - WRITE_SYSREG32(v->arch.virt_timer.ctl, CNTV_CTL_EL0); + WRITE_SYSREG(v->arch.virt_timer.ctl, CNTV_CTL_EL0); } static bool vtimer_cntp_ctl(struct cpu_user_regs *regs, uint32_t *r, bool read) @@ -347,7 +347,7 @@ bool vtimer_emulate(struct cpu_user_regs *regs, union hsr hsr) } static void vtimer_update_irq(struct vcpu *v, struct vtimer *vtimer, - uint32_t vtimer_ctl) + register_t vtimer_ctl) { bool level; @@ -389,7 +389,7 @@ void vtimer_update_irqs(struct vcpu *v) * but this requires reworking the arch timer to implement this. */ vtimer_update_irq(v, &v->arch.virt_timer, - READ_SYSREG32(CNTV_CTL_EL0) & ~CNTx_CTL_MASK); + READ_SYSREG(CNTV_CTL_EL0) & ~CNTx_CTL_MASK); /* For the physical timer we rely on our emulated state. */ vtimer_update_irq(v, &v->arch.phys_timer, v->arch.phys_timer.ctl); diff --git a/xen/include/asm-arm/domain.h b/xen/include/asm-arm/domain.h index 2d4f38c669..c9277b5c6d 100644 --- a/xen/include/asm-arm/domain.h +++ b/xen/include/asm-arm/domain.h @@ -36,7 +36,7 @@ struct vtimer { struct vcpu *v; int irq; struct timer timer; - uint32_t ctl; + register_t ctl; uint64_t cval; }; diff --git a/xen/include/asm-arm/processor.h b/xen/include/asm-arm/processor.h index 5c1768cdec..2577e9a244 100644 --- a/xen/include/asm-arm/processor.h +++ b/xen/include/asm-arm/processor.h @@ -485,9 +485,12 @@ extern register_t __cpu_logical_map[]; /* Timer control registers */ #define CNTx_CTL_ENABLE (1u<<0) /* Enable timer */ -#define CNTx_CTL_MASK (1u<<1) /* Mask IRQ */ +#define CNTx_CTL_MASK (1ul<<1) /* Mask IRQ */ #define CNTx_CTL_PENDING (1u<<2) /* IRQ pending */ +/* Timer frequency mask */ +#define CNTFRQ_MASK GENMASK(31, 0) + /* Exception Vector offsets */ /* ... ARM32 */ #define VECTOR32_RST 0