From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E4DA2445AC6 for ; Mon, 20 Jul 2026 17:15:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784567725; cv=none; b=BgZ15i5Pex5qogU01u7Gj+Pob57HwiPFqTjscoRJFxNInL66rcBSIKEPYlYGWpA/biVC0CJMXwUPQ6MdMyt8DhhuMmvcG5AjF46rfXiFtrJN6kzKLXmPS8l8WffleXIdiil6Vbd8kH7WApqNSH3rmWfNnER8VdUOaJZcnny/CXg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784567725; c=relaxed/simple; bh=xPhHotVgi3UtDDRRKgaZEXaRB8BvlrE6zwflileImCA=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=MCwHzrA6ag2M8vOC09tk1xKAuzbVogeFwCBPNYP+eSAVD6OPgoMCa0BapgWSE1RH1RjT/seCRA0W7i5dxIb0oxMYHp9WChPug9sG9TpTbJcnoeIAtY9hXFW7eimBL55wm3+4DHlCsMT6VIkujIjOy0JrMcOGtQOVqwUV7YH+elI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=p5PzbDwB; arc=none smtp.client-ip=209.85.128.69 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="p5PzbDwB" Received: by mail-wm1-f69.google.com with SMTP id 5b1f17b1804b1-4955fd77c18so6770265e9.2 for ; Mon, 20 Jul 2026 10:15:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1784567719; x=1785172519; darn=lists.linux.dev; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=o9KxvNMIvUtQq3xLQOoAWnVxOnpsU0qAP80ryNPLHJM=; b=p5PzbDwBYOw9VeNt7PRmDlQDgWclCVKFX69kHR61+kV95AllkB9wps7ImcSIjI35y2 zaVtvpY0INRasEN7us1C0kdxBYL1mOML8EGNLkwIDXMopEa9T+tnulLDR7kC083jkftz jvzYajpn444yA8Mxwl2uGy9SR8tY/6eeQFliuXb6I7jC43q6CrkgNKpSTqFVp/H+Oaq0 ZgGWpsON5OzSrxYxoKNiUVk9YDBz9taLP5w5e/uAQqbo+5dPCpOvhhF46IFzP2F42y16 IzN7gjNqviGxj7kE6MuGcAdSSdrDowgqnRMCG5EK8sNhlWwsHieay+xPFAchmyVwKWO3 ciZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784567719; x=1785172519; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=o9KxvNMIvUtQq3xLQOoAWnVxOnpsU0qAP80ryNPLHJM=; b=CZDK36TG/IbGInZiseCdWHK8Ok36BETxQH0zRHYy3qvvqIPjoR5TJ3PaB868x89l9Q zAwN5a4FS0aoccFcfflRlNT6U3fAcmRrJXN9KD+kcGxEQzYPVQKixOdLaecLlAquksd3 aHu+HbYWOSvt1eSZUE1NmIoC8rqJOVJptEB3OS6txxCanECZRajq4JrL4fi3nTgaPdIJ ZKvEdIgB9e3QQ5tKjqnAyTWkemDFIK9DoZSITGgUWdKneOX4TgZZFBQoMdHPZ8f1r4XH jGZQ7Xd5z9dZywXZE0MQ0LF7qQg6UpnyK9igbJKFgtE3zsEubDHBb5yC3rUPF8+0s2yZ 4BHw== X-Forwarded-Encrypted: i=1; AHgh+Rolc9LQcz8UskqVBflEVIuyH9aUBGdNY8J2TOF5EpIkpDinE4+9CQDfwEW0f+g19Bsirigs10c=@lists.linux.dev X-Gm-Message-State: AOJu0YztC0cGOzGnt4d4odITxLQSNVegsogQe9AgDZvdxx0q94pPa7Cl py/z+en+MXJ4pVsSQq+P9MnfMJq+TyThZg1rZM0O9cFCCV5mIHq4nCmy64vsNnDkphLo4ZhzYpA JIseaFziyIVNoNYCYElM7yw== X-Received: from wmbjl1.prod.google.com ([2002:a05:600c:6a81:b0:495:571e:e5e2]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:1554:b0:493:c10c:22f0 with SMTP id 5b1f17b1804b1-4954a50d963mr194510095e9.20.1784567719153; Mon, 20 Jul 2026 10:15:19 -0700 (PDT) Date: Mon, 20 Jul 2026 18:14:57 +0100 In-Reply-To: <20260720171513.1415357-1-vdonnefort@google.com> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260720171513.1415357-1-vdonnefort@google.com> X-Mailer: git-send-email 2.55.0.229.g6434b31f56-goog Message-ID: <20260720171513.1415357-2-vdonnefort@google.com> Subject: [PATCH v3 01/17] KVM: arm64: Add pkvm_private_va_range_pa From: Vincent Donnefort To: maz@kernel.org, oupton@kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: joey.gouly@arm.com, seiden@linux.ibm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, kernel-team@android.com, tabba@google.com, qperret@google.com, Vincent Donnefort , Fuad Tabba Content-Type: text/plain; charset="UTF-8" Mappings in the pKVM private range are not identity mapped, making the standard __hyp_pa() unsuitable for translating these addresses. Introduce pkvm_private_va_range_pa() to resolve physical addresses for this range by walking the hypervisor page-table. This will be useful for the upcoming pKVM heap allocator. Signed-off-by: Vincent Donnefort Reviewed-by: Fuad Tabba diff --git a/arch/arm64/kvm/hyp/include/nvhe/mm.h b/arch/arm64/kvm/hyp/include/nvhe/mm.h index 6e83ce35c2f2..85f1e3c711d9 100644 --- a/arch/arm64/kvm/hyp/include/nvhe/mm.h +++ b/arch/arm64/kvm/hyp/include/nvhe/mm.h @@ -30,5 +30,6 @@ int __pkvm_create_private_mapping(phys_addr_t phys, size_t size, unsigned long *haddr); int pkvm_create_stack(phys_addr_t phys, unsigned long *haddr); int pkvm_alloc_private_va_range(size_t size, unsigned long *haddr); +phys_addr_t pkvm_private_va_range_pa(void *va); #endif /* __KVM_HYP_MM_H */ diff --git a/arch/arm64/kvm/hyp/include/nvhe/spinlock.h b/arch/arm64/kvm/hyp/include/nvhe/spinlock.h index 7c7ea8c55405..260e14d6d200 100644 --- a/arch/arm64/kvm/hyp/include/nvhe/spinlock.h +++ b/arch/arm64/kvm/hyp/include/nvhe/spinlock.h @@ -17,6 +17,8 @@ #include #include +#include + typedef union hyp_spinlock { u32 __val; struct { @@ -122,4 +124,6 @@ static inline void hyp_assert_lock_held(hyp_spinlock_t *lock) static inline void hyp_assert_lock_held(hyp_spinlock_t *lock) { } #endif +DEFINE_LOCK_GUARD_1(hyp_spinlock, hyp_spinlock_t, hyp_spin_lock(_T->lock), + hyp_spin_unlock(_T->lock)) #endif /* __ARM64_KVM_NVHE_SPINLOCK_H__ */ diff --git a/arch/arm64/kvm/hyp/nvhe/mm.c b/arch/arm64/kvm/hyp/nvhe/mm.c index 3b0bee496bff..8b8c9d3dc82a 100644 --- a/arch/arm64/kvm/hyp/nvhe/mm.c +++ b/arch/arm64/kvm/hyp/nvhe/mm.c @@ -90,6 +90,17 @@ int pkvm_alloc_private_va_range(size_t size, unsigned long *haddr) return ret; } +phys_addr_t pkvm_private_va_range_pa(void *va) +{ + kvm_pte_t pte = 0; + + guard(hyp_spinlock)(&pkvm_pgd_lock); + WARN_ON(kvm_pgtable_get_leaf(&pkvm_pgtable, (u64)va, &pte, NULL)); + WARN_ON(!kvm_pte_valid(pte)); + + return kvm_pte_to_phys(pte) + offset_in_page(va); +} + int __pkvm_create_private_mapping(phys_addr_t phys, size_t size, enum kvm_pgtable_prot prot, unsigned long *haddr) -- 2.55.0.229.g6434b31f56-goog