From nobody Sun Oct 5 21:49:27 2025 Received: from mail-pg1-f202.google.com (mail-pg1-f202.google.com [209.85.215.202]) (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 BF34D2C08DA for ; Tue, 29 Jul 2025 22:55:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753829757; cv=none; b=hiVzHKW1EuLO4GnFyFka7dWWeqtf3/tniI656daDgiQJyKvttHQO+Ui5fhvsnhKlvcNP9aU/H282WV6/B5bumV+PeiJoTpVPWrEh4lLhJOJYAG1oM2KIMEJ+Y/kvjxTfbk22tRXccd99gbWdwHji4KaudOktT3VyBzObMT/XX2k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753829757; c=relaxed/simple; bh=kT4TPh6b6a+599yVr48tLtWPsbJrSQilKhWv9nX31KU=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=QvhZkS8c5HdDddnMs1UFgrDnKt5YO/7pnLXKz7ce60RESiV6d0ZWVMyXbzTWRLutZ+dnrENjmAukRZWbISLlSu0fIz2BJ4gyxOCrZjR4E2t9wwl7A14tHpTWmFGqHwSFlBozUnE7MflW3/R2bsJys6Zqmi5Vuk1YLyBYGg+1BTg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=gBjqTmid; arc=none smtp.client-ip=209.85.215.202 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--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="gBjqTmid" Received: by mail-pg1-f202.google.com with SMTP id 41be03b00d2f7-b0e0c573531so4462239a12.3 for ; Tue, 29 Jul 2025 15:55:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1753829754; x=1754434554; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=ktkS4XskSt/ldoD432h3UVfIavH2avWaXTLdCBUmGII=; b=gBjqTmidzRqH2Q1k26ImAVp2G1O4kIip+tGFhkj0DKMctmQYyjXvCvwWcJrVQVEOkb x3IZKToHtcZ7N3oqcyqXn3McQ5mj9qzrOxz8k63bqlm3HSwG05dvYOagk0TGfASj6WnY TIsPT3EIE3p2Ig0Iq22GpgBz///STDrtJk8Qi9TbJkPTBnmv5VG7URWQ91QdhDtA5ynB K9SoOGRRoPH/6RyASqC9h11V1Jjd27JBb1mCfh2ym5YcCBvcI+Ie9ZK+amqQ5bNBJ9Wo cICZk0Fb4U9pci2+dAvktupjtnKGUqGu1tEJVo2U2/skno/LM6CGjwdG1IANlwS62GmU +4uQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1753829754; x=1754434554; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=ktkS4XskSt/ldoD432h3UVfIavH2avWaXTLdCBUmGII=; b=pN/GqlHzoI64AuTl741qAC2l3wp1UkmEDB/JnImLeELeyDlvs9IvWEbSylTr5qRu3a IdTGmChoiVXYwpnciUCovmsnWM8+a8ujgtXyny452ojsLg7Mwye+8UHgSNZ9+aknOb83 sQH3uFXt8m4D1vpXoRnRxHJ/A1DgQfZvtM7RFt5eNg0F5ZnaV55m0NFF3zZ8anuU7C96 rhruK2Wc+37/F+k0MSAKnwpSayifK8ySBOtzBknXYjgnAXblJhzLIvar6FUu5MhzHY9g GJzHB7eUls/WRCrYet/Yjm9Tlp19l7qCnvaxTDC6y/KMb3cJN9fEqxYwtec/i92JTigd +bXA== X-Forwarded-Encrypted: i=1; AJvYcCVRb/Pvt/sGjRwiCr2iV0QG0BgkkuKjwb8wJ1/Qog2MnXvufTVA8/9VLaVwWR2mcxYj/3fBh2/M3uqBg5E=@vger.kernel.org X-Gm-Message-State: AOJu0Yx2MBKlCBNWkZB1HLN+aiqVykoDkTd6lYi1xOxH0bmg0srxVSII Xo9t8ZJYThGkymqtx9NQvPP+3Sn+3XkUiqeUKcGkUrwTyXDRM2yKaIutIdQkbLEHn7I6DMnvXhJ C9YWXZA== X-Google-Smtp-Source: AGHT+IF1LeGDZhIWjFUGooq7VUSMoBrDEWnqlrxEZEjVnkOZOM3/aPj5utdyv/03YLi7nQKPITTKBEyZftA= X-Received: from pgbdp2.prod.google.com ([2002:a05:6a02:f02:b0:b3f:2e87:230b]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:3c90:b0:232:93c2:8851 with SMTP id adf61e73a8af0-23dc0d5e0b5mr1613137637.18.1753829753942; Tue, 29 Jul 2025 15:55:53 -0700 (PDT) Reply-To: Sean Christopherson Date: Tue, 29 Jul 2025 15:54:44 -0700 In-Reply-To: <20250729225455.670324-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250729225455.670324-1-seanjc@google.com> X-Mailer: git-send-email 2.50.1.552.g942d659e1b-goog Message-ID: <20250729225455.670324-14-seanjc@google.com> Subject: [PATCH v17 13/24] KVM: x86/mmu: Hoist guest_memfd max level/order helpers "up" in mmu.c From: Sean Christopherson To: Paolo Bonzini , Marc Zyngier , Oliver Upton , Sean Christopherson Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, Ira Weiny , Gavin Shan , Shivank Garg , Vlastimil Babka , Xiaoyao Li , David Hildenbrand , Fuad Tabba , Ackerley Tng , Tao Chan , James Houghton Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Move kvm_max_level_for_order() and kvm_max_private_mapping_level() up in mmu.c so that they can be used by __kvm_mmu_max_mapping_level(). Opportunistically drop the "inline" from kvm_max_level_for_order(). No functional change intended. Reviewed-by: Xiaoyao Li Reviewed-by: Ackerley Tng Signed-off-by: Sean Christopherson Reviewed-by: David Hildenbrand Reviewed-by: Fuad Tabba --- arch/x86/kvm/mmu/mmu.c | 72 +++++++++++++++++++++--------------------- 1 file changed, 36 insertions(+), 36 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index b735611e8fcd..20dd9f64156e 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -3285,6 +3285,42 @@ static int host_pfn_mapping_level(struct kvm *kvm, g= fn_t gfn, return level; } =20 +static u8 kvm_max_level_for_order(int order) +{ + BUILD_BUG_ON(KVM_MAX_HUGEPAGE_LEVEL > PG_LEVEL_1G); + + KVM_MMU_WARN_ON(order !=3D KVM_HPAGE_GFN_SHIFT(PG_LEVEL_1G) && + order !=3D KVM_HPAGE_GFN_SHIFT(PG_LEVEL_2M) && + order !=3D KVM_HPAGE_GFN_SHIFT(PG_LEVEL_4K)); + + if (order >=3D KVM_HPAGE_GFN_SHIFT(PG_LEVEL_1G)) + return PG_LEVEL_1G; + + if (order >=3D KVM_HPAGE_GFN_SHIFT(PG_LEVEL_2M)) + return PG_LEVEL_2M; + + return PG_LEVEL_4K; +} + +static u8 kvm_max_private_mapping_level(struct kvm *kvm, kvm_pfn_t pfn, + u8 max_level, int gmem_order) +{ + u8 req_max_level; + + if (max_level =3D=3D PG_LEVEL_4K) + return PG_LEVEL_4K; + + max_level =3D min(kvm_max_level_for_order(gmem_order), max_level); + if (max_level =3D=3D PG_LEVEL_4K) + return PG_LEVEL_4K; + + req_max_level =3D kvm_x86_call(gmem_max_mapping_level)(kvm, pfn); + if (req_max_level) + max_level =3D min(max_level, req_max_level); + + return max_level; +} + static int __kvm_mmu_max_mapping_level(struct kvm *kvm, const struct kvm_memory_slot *slot, gfn_t gfn, int max_level, bool is_private) @@ -4503,42 +4539,6 @@ void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu= , struct kvm_async_pf *work) vcpu->stat.pf_fixed++; } =20 -static inline u8 kvm_max_level_for_order(int order) -{ - BUILD_BUG_ON(KVM_MAX_HUGEPAGE_LEVEL > PG_LEVEL_1G); - - KVM_MMU_WARN_ON(order !=3D KVM_HPAGE_GFN_SHIFT(PG_LEVEL_1G) && - order !=3D KVM_HPAGE_GFN_SHIFT(PG_LEVEL_2M) && - order !=3D KVM_HPAGE_GFN_SHIFT(PG_LEVEL_4K)); - - if (order >=3D KVM_HPAGE_GFN_SHIFT(PG_LEVEL_1G)) - return PG_LEVEL_1G; - - if (order >=3D KVM_HPAGE_GFN_SHIFT(PG_LEVEL_2M)) - return PG_LEVEL_2M; - - return PG_LEVEL_4K; -} - -static u8 kvm_max_private_mapping_level(struct kvm *kvm, kvm_pfn_t pfn, - u8 max_level, int gmem_order) -{ - u8 req_max_level; - - if (max_level =3D=3D PG_LEVEL_4K) - return PG_LEVEL_4K; - - max_level =3D min(kvm_max_level_for_order(gmem_order), max_level); - if (max_level =3D=3D PG_LEVEL_4K) - return PG_LEVEL_4K; - - req_max_level =3D kvm_x86_call(gmem_max_mapping_level)(kvm, pfn); - if (req_max_level) - max_level =3D min(max_level, req_max_level); - - return max_level; -} - static void kvm_mmu_finish_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault, int r) { --=20 2.50.1.552.g942d659e1b-goog