From nobody Sun Oct 5 07:21:20 2025 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (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 9F589224240 for ; Thu, 7 Aug 2025 20:16:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754597801; cv=none; b=jSxCTEX/L3kGSPWirYEZFV7FKB3xR9JdXh9QQ3DsQCZOqd2GmCnwro7P5+l21ReRK9qDIkjlS1XvQsRJPMw3DbYiLcLHh0laxz1FmhBuntXntPtXQpR3XRBTJhqKQYDFwcycZ/h5E620UTqJD6liLyy7izLVvRBy7tN6ubLoYjQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754597801; c=relaxed/simple; bh=ZGm78cVu0eE8NMdDtBRB7S6EsWyYptmULKCe3VJEPzw=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=K3oI5NIDzmldkh4MCzwoXBgCIpM8YJZwP2HLk8zlgW79ENPx7pOERw+EiGpv6Wwf05jOV/kzSg71ImHn4Gn3twqMgNjNeBqppnrx+WReStxcZSU4HJVXw5VphjOEeN1mttQ2suuKgqirY8zvknEIh89ofwjFoK63DOE7PfDV8Mk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--sagis.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=KUNPzBGX; arc=none smtp.client-ip=209.85.216.74 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--sagis.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="KUNPzBGX" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-31f74a64da9so1615031a91.2 for ; Thu, 07 Aug 2025 13:16:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1754597799; x=1755202599; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=Z4PvKVoMzsbWuS6ZNQkHyRpKtVjC8q7nP9qV4BuVoxE=; b=KUNPzBGXuk1sv+jl+byzxQRbS/vJ9iOIor2YSOXTcPW0eFYZwJmm+2mS8oIwraujsR Qtf59XKVr4Qp29P7lRnQYcTkxlqY/bSmozJoJLKzbrsiGd0CqX+IRdkZdkVzCzneN5pu NcuyVD2TAzr0n715DDJYruVl4kWEiMEV2OOTxqik6+o2nupHnAibL8AobsbaB+hTaWuA 8y2O992f8vYqbBtZDyoGpyVBRy8TpcmSI8wbLDrWllcCrFYlwnMBwobWVfF2rPLEi5ew 4WITXpntEKoNyNntbbN+Bxd07IOdzwCFWrq3ouMTqv+e9i0AIPSWFIeBr0CB0d4LZsZ5 KUow== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754597799; x=1755202599; h=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; bh=Z4PvKVoMzsbWuS6ZNQkHyRpKtVjC8q7nP9qV4BuVoxE=; b=Ay/16tyyHiUXuUOwE7cFfKypqtlGPQRNmJI4lJMGAj1QwVop43YwbPTnNoqUYYPkoT Qa7JsM+SA0ixhryftYtgFXreKO7g29QyYg+xIL6yn4/wyreL/gLSyjfYe7bXPVQTY9Og EFq18CrpoWREgKrlPTKd2KYkJuylNo+oGwz5qeuoaMcGHXPO68IN/qXZUPzLuF5N0IM+ jW2bYZznAqcNy5iujzviX5ISNAZdiv/OgyUozjHVnTwd9mXrrmOvSr3fvM8FZZkcjaZQ +9eAiAHtDLhRbuOgefvK6i+u6azrlwfFqqEwzxEQkIBWPKbypmEz4w2l0iAX3ANOOPTT drqA== X-Gm-Message-State: AOJu0YxhjNjzpXZMq7Xl3Js6+V1TeqRpavbYeAHJI9MMfIoo8xXkiq8H ZqC5b+y3Ouee8dH1TdqgUnIRRm9HvQkVBdwY/7SZeyP8Yj0F0kZbr46epDthSLJUnd6mRQ4DqmL HqQ== X-Google-Smtp-Source: AGHT+IHlHTUzlI4XwfrvCHdPuSXY+IAAqyr2BEu6Hs2JizbOH4J+KBh8PsRSDzHe1VZ8MTVIYlqnupSA+w== X-Received: from pjx13.prod.google.com ([2002:a17:90b:568d:b0:31e:fe0d:f464]) (user=sagis job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:28c5:b0:31a:ab75:6e45 with SMTP id 98e67ed59e1d1-32183c42d6dmr439441a91.28.1754597799003; Thu, 07 Aug 2025 13:16:39 -0700 (PDT) Date: Thu, 7 Aug 2025 13:15:57 -0700 In-Reply-To: <20250807201628.1185915-1-sagis@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250807201628.1185915-1-sagis@google.com> X-Mailer: git-send-email 2.51.0.rc0.155.g4a0f42376b-goog Message-ID: <20250807201628.1185915-2-sagis@google.com> Subject: [PATCH v8 01/30] KVM: selftests: Add function to allow one-to-one GVA to GPA mappings From: Sagi Shahar To: linux-kselftest@vger.kernel.org, Paolo Bonzini , Shuah Khan , Sean Christopherson , Ackerley Tng , Ryan Afranji , Andrew Jones , Isaku Yamahata , Erdem Aktas , Rick Edgecombe , Sagi Shahar , Roger Wang , Binbin Wu , Oliver Upton , "Pratik R. Sampat" , Reinette Chatre , Ira Weiny Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Ackerley Tng One-to-one GVA to GPA mappings can be used in the guest to set up boot sequences during which paging is enabled, hence requiring a transition from using physical to virtual addresses in consecutive instructions. Signed-off-by: Ackerley Tng Signed-off-by: Sagi Shahar --- .../testing/selftests/kvm/include/kvm_util.h | 3 +++ tools/testing/selftests/kvm/lib/kvm_util.c | 27 +++++++++++++++---- 2 files changed, 25 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing= /selftests/kvm/include/kvm_util.h index bee65ca08721..9994861d2acb 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -650,6 +650,9 @@ vm_vaddr_t __vm_vaddr_alloc(struct kvm_vm *vm, size_t s= z, vm_vaddr_t vaddr_min, vm_vaddr_t vm_vaddr_alloc_shared(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min, enum kvm_mem_region_type type); +vm_vaddr_t vm_vaddr_identity_alloc(struct kvm_vm *vm, size_t sz, + vm_vaddr_t vaddr_min, + enum kvm_mem_region_type type); vm_vaddr_t vm_vaddr_alloc_pages(struct kvm_vm *vm, int nr_pages); vm_vaddr_t __vm_vaddr_alloc_page(struct kvm_vm *vm, enum kvm_mem_region_type type); diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/sel= ftests/kvm/lib/kvm_util.c index a055343a7bf7..8f3dbf749afa 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -1460,15 +1460,14 @@ vm_vaddr_t vm_vaddr_unused_gap(struct kvm_vm *vm, s= ize_t sz, } =20 static vm_vaddr_t ____vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, - vm_vaddr_t vaddr_min, + vm_vaddr_t vaddr_min, vm_paddr_t paddr_min, enum kvm_mem_region_type type, bool protected) { uint64_t pages =3D (sz >> vm->page_shift) + ((sz % vm->page_size) !=3D 0); =20 virt_pgd_alloc(vm); - vm_paddr_t paddr =3D __vm_phy_pages_alloc(vm, pages, - KVM_UTIL_MIN_PFN * vm->page_size, + vm_paddr_t paddr =3D __vm_phy_pages_alloc(vm, pages, paddr_min, vm->memslots[type], protected); =20 /* @@ -1492,7 +1491,7 @@ static vm_vaddr_t ____vm_vaddr_alloc(struct kvm_vm *v= m, size_t sz, vm_vaddr_t __vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr= _min, enum kvm_mem_region_type type) { - return ____vm_vaddr_alloc(vm, sz, vaddr_min, type, + return ____vm_vaddr_alloc(vm, sz, vaddr_min, KVM_UTIL_MIN_PFN * vm->page_= size, type, vm_arch_has_protected_memory(vm)); } =20 @@ -1500,7 +1499,25 @@ vm_vaddr_t vm_vaddr_alloc_shared(struct kvm_vm *vm, = size_t sz, vm_vaddr_t vaddr_min, enum kvm_mem_region_type type) { - return ____vm_vaddr_alloc(vm, sz, vaddr_min, type, false); + return ____vm_vaddr_alloc(vm, sz, vaddr_min, KVM_UTIL_MIN_PFN * vm->page_= size, type, false); +} + +/* + * Allocate memory in @vm of size @sz beginning with the desired virtual a= ddress + * of @vaddr_min and backed by physical address equal to returned virtual + * address. + * + * Return the address where the memory is allocated. + */ +vm_vaddr_t vm_vaddr_identity_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_= t vaddr_min, + enum kvm_mem_region_type type) +{ + vm_vaddr_t gva =3D ____vm_vaddr_alloc(vm, sz, vaddr_min, + (vm_paddr_t)vaddr_min, type, + vm_arch_has_protected_memory(vm)); + TEST_ASSERT_EQ(gva, addr_gva2gpa(vm, gva)); + + return gva; } =20 /* --=20 2.51.0.rc0.155.g4a0f42376b-goog