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s=mimecast20190719; t=1710777245; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=igcS/L5aoSdp/RqRXlSQ8qbrsN0mnzGNEZrfapLAc0g=; b=ipfQ4M8OB39in3vyw34jV4I64A6t9yN/TesJo19fPCGq4K4/f3sNDLf3+KwcnSlMIs9Mdr Rbv7Tcb9bywxx96PJ8+n5lxTdHUbD+VOJCHEKwf2lFdZ/HMTXuspflBETBmcfNJcrkwggE GCA7kN58B9feticCMZME3jxndIrKZxU= X-MC-Unique: 9gElzMerPqaRuWegFa0OUg-1 From: Gerd Hoffmann To: qemu-devel@nongnu.org Cc: Tom Lendacky , Marcelo Tosatti , kvm@vger.kernel.org, Paolo Bonzini , Gerd Hoffmann Subject: [PATCH v4 2/2] target/i386: add guest-phys-bits cpu property Date: Mon, 18 Mar 2024 16:53:36 +0100 Message-ID: <20240318155336.156197-3-kraxel@redhat.com> In-Reply-To: <20240318155336.156197-1-kraxel@redhat.com> References: <20240318155336.156197-1-kraxel@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.1 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.374, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1710777304919100001 Content-Type: text/plain; charset="utf-8" Allows to set guest-phys-bits (cpuid leaf 80000008, eax[23:16]) via -cpu $model,guest-phys-bits=3D$nr. Signed-off-by: Gerd Hoffmann --- target/i386/cpu.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index c88c895a5b3e..e0d73b6ec654 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -7380,6 +7380,14 @@ static void x86_cpu_realizefn(DeviceState *dev, Erro= r **errp) if (cpu->phys_bits =3D=3D 0) { cpu->phys_bits =3D TCG_PHYS_ADDR_BITS; } + if (cpu->guest_phys_bits && + (cpu->guest_phys_bits > cpu->phys_bits || + cpu->guest_phys_bits < 32)) { + error_setg(errp, "guest-phys-bits should be between 32 and %u " + " (but is %u)", + cpu->phys_bits, cpu->guest_phys_bits); + return; + } } else { /* For 32 bit systems don't use the user set value, but keep * phys_bits consistent with what we tell the guest. @@ -7388,6 +7396,10 @@ static void x86_cpu_realizefn(DeviceState *dev, Erro= r **errp) error_setg(errp, "phys-bits is not user-configurable in 32 bit= "); return; } + if (cpu->guest_phys_bits !=3D 0) { + error_setg(errp, "guest-phys-bits is not user-configurable in = 32 bit"); + return; + } =20 if (env->features[FEAT_1_EDX] & (CPUID_PSE36 | CPUID_PAE)) { cpu->phys_bits =3D 36; @@ -7888,6 +7900,7 @@ static Property x86_cpu_properties[] =3D { DEFINE_PROP_BOOL("x-force-features", X86CPU, force_features, false), DEFINE_PROP_BOOL("kvm", X86CPU, expose_kvm, true), DEFINE_PROP_UINT32("phys-bits", X86CPU, phys_bits, 0), + DEFINE_PROP_UINT32("guest-phys-bits", X86CPU, guest_phys_bits, 0), DEFINE_PROP_BOOL("host-phys-bits", X86CPU, host_phys_bits, false), DEFINE_PROP_UINT8("host-phys-bits-limit", X86CPU, host_phys_bits_limit= , 0), DEFINE_PROP_BOOL("fill-mtrr-mask", X86CPU, fill_mtrr_mask, true), --=20 2.44.0