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=-16.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 95311C4338F for ; Wed, 18 Aug 2021 20:00:01 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 344CD610FE for ; Wed, 18 Aug 2021 20:00:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 344CD610FE Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id DD6C64A1AF; Wed, 18 Aug 2021 16:00:00 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@google.com Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7z19wFY6c9oV; Wed, 18 Aug 2021 15:59:56 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 1E7C34B0F0; Wed, 18 Aug 2021 15:59:49 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 4941B400D5 for ; Wed, 18 Aug 2021 14:43:21 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7D2ztX7LmZoW for ; Wed, 18 Aug 2021 14:43:20 -0400 (EDT) Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 4256440162 for ; Wed, 18 Aug 2021 14:43:20 -0400 (EDT) Received: by mail-pf1-f201.google.com with SMTP id o3-20020a625a030000b02903c9ba4d8a70so1780767pfb.12 for ; Wed, 18 Aug 2021 11:43:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=sybk7YcBeZufJ2AiOux9y0QLju0ZjmiMoQ+rDeqF05I=; b=KyWRMVB2YjHXSj3SrlXBQ1vUcQjS4upaB1ecKlUekeQMP3aw4uhnG6uXijlPT/31ui Z28ax39JzZAx1Z7J8FJei5MIVv98GH6r7vIQCEG3PfaFCvB4WEuqVRxab5ga+fSTQmeY j5QUx4OUcKTj4AdUaQMpWPvrugwRMTrM64LTE1De5ouxE5IHLW5fPrrULhaBEHdcoHGo hmbDITScovX72Zyu4nY8lVbvpgAGK8k1T0EtpyvDMXvLOlNKXz+0BX/BgPjyaT1zNHnT rqsSfheHhwSn27ZcOd/7GIFehJ32fm81DLLxjUIGrGL2qdhydKSCw30/2SGJncJylHge 2juw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=sybk7YcBeZufJ2AiOux9y0QLju0ZjmiMoQ+rDeqF05I=; b=U1KG2rSFJG0X3mcyzaSaGXdC50uAOcJgB5dY3u9T3W9mshsXHbfz39UcIfnkOMOfg0 TZLYnykL9JANIYuZCNs2Ojz0xt/Mc4Bh/lzgyOnBmcpIXZkovvPiugoGGb0ZQr6O8zmm rw167eqO+buYsl9/P1Zgms0A6ybXITRraPSRQ7A4DxNjNJsY9bCS2LbHxDVDKZvbLYYy GK9ZHavrdB7AKHLrMKEkGJCk39s4GFFkbwmql/0/Z+cougnz4tvtBiXAWGna8eLlK4nj dd5YIarBbLVwtE9IeqHS91HBjrHP91M71uvN/OHM3U1Lh1zT+2vTup8LGAKlPZdVMsi1 ddAw== X-Gm-Message-State: AOAM532/Va1ynAN+LKir96wTN4JG0SUmxEoZzUXoYr90LszhTyTdRNHU Ku/5PHZbHZRuiuzc3fi8EecMKzZsYip2 X-Google-Smtp-Source: ABdhPJwpulpudlfIiB7CO8SfhZeZ9mfxxExEhDLOhAm5IzLeR7emCgSi+C7ROeGvaAWlJ6EMz8iciBV4Xt6V X-Received: from rananta-virt.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:1bcc]) (user=rananta job=sendgmr) by 2002:a17:90b:396:: with SMTP id ga22mr92005pjb.0.1629312198788; Wed, 18 Aug 2021 11:43:18 -0700 (PDT) Date: Wed, 18 Aug 2021 18:43:02 +0000 In-Reply-To: <20210818184311.517295-1-rananta@google.com> Message-Id: <20210818184311.517295-2-rananta@google.com> Mime-Version: 1.0 References: <20210818184311.517295-1-rananta@google.com> X-Mailer: git-send-email 2.33.0.rc1.237.g0d66db33f3-goog Subject: [PATCH v2 01/10] KVM: arm64: selftests: Add MMIO readl/writel support From: Raghavendra Rao Ananta To: Paolo Bonzini , Marc Zyngier X-Mailman-Approved-At: Wed, 18 Aug 2021 15:59:47 -0400 Cc: kvm@vger.kernel.org, Peter Shier , Raghavendra Rao Anata , kvmarm@lists.cs.columbia.edu X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Define the readl() and writel() functions for the guests to access (4-byte) the MMIO region. The routines, and their dependents, are inspired from the kernel's arch/arm64/include/asm/io.h and arch/arm64/include/asm/barrier.h. Signed-off-by: Raghavendra Rao Ananta --- .../selftests/kvm/include/aarch64/processor.h | 45 ++++++++++++++++++- 1 file changed, 44 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/include/aarch64/processor.h b/tools/testing/selftests/kvm/include/aarch64/processor.h index 27dc5c2e56b9..14f68bf55036 100644 --- a/tools/testing/selftests/kvm/include/aarch64/processor.h +++ b/tools/testing/selftests/kvm/include/aarch64/processor.h @@ -127,6 +127,49 @@ void vm_install_sync_handler(struct kvm_vm *vm, val; \ }) -#define isb() asm volatile("isb" : : : "memory") +#define isb() asm volatile("isb" : : : "memory") +#define dsb(opt) asm volatile("dsb " #opt : : : "memory") +#define dmb(opt) asm volatile("dmb " #opt : : : "memory") + +#define dma_wmb() dmb(oshst) +#define __iowmb() dma_wmb() + +#define dma_rmb() dmb(oshld) + +#define __iormb(v) \ +({ \ + unsigned long tmp; \ + \ + dma_rmb(); \ + \ + /* \ + * Courtesy of arch/arm64/include/asm/io.h: \ + * Create a dummy control dependency from the IO read to any \ + * later instructions. This ensures that a subsequent call \ + * to udelay() will be ordered due to the ISB in __delay(). \ + */ \ + asm volatile("eor %0, %1, %1\n" \ + "cbnz %0, ." \ + : "=r" (tmp) : "r" ((unsigned long)(v)) \ + : "memory"); \ +}) + +static __always_inline void __raw_writel(u32 val, volatile void *addr) +{ + asm volatile("str %w0, [%1]" : : "rZ" (val), "r" (addr)); +} + +static __always_inline u32 __raw_readl(const volatile void *addr) +{ + u32 val; + asm volatile("ldr %w0, [%1]" : "=r" (val) : "r" (addr)); + return val; +} + +#define writel_relaxed(v,c) ((void)__raw_writel((__force u32)cpu_to_le32(v),(c))) +#define readl_relaxed(c) ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; }) + +#define writel(v,c) ({ __iowmb(); writel_relaxed((v),(c));}) +#define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(__v); __v; }) #endif /* SELFTEST_KVM_PROCESSOR_H */ -- 2.33.0.rc1.237.g0d66db33f3-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm