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Fri, 18 Oct 2024 15:28:24 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1729258112; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=nlQmu/jBaqVvffDbQ3FpNPvwuk8rFn+3FbqwIY4nfdc=; b=WX1l3IF2Lfb3QoLTTItOC2JemaalahIsU30I3TyiVNuIdnDV2YGyKCPsMbqFbF6Z7JWoBC iERe+QTJnXs14FZjwPjxdciMFmxRHyJ2QZyVRVZot7XwePmgEGDjgrnlzbeh2KjFOFL4o9 JPb2FhoemuQ/jXreNMM+e/iIVpmZ0Y8= X-MC-Unique: lMMfIUOzPBCuN3ZjjsHh-w-1 From: Markus Armbruster To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Igor Mammedov Subject: [PULL 6/9] target/i386/cpu: Avoid mixing signed and unsigned in property setters Date: Fri, 18 Oct 2024 15:28:21 +0200 Message-ID: <20241018132824.3379780-7-armbru@redhat.com> In-Reply-To: <20241018132824.3379780-1-armbru@redhat.com> References: <20241018132824.3379780-1-armbru@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 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=170.10.133.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.016, 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_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, T_SPF_TEMPERROR=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: 1729258224718116600 Properties "family", "model", and "stepping" are visited as signed integers. They are backed by bits in CPUX86State member @cpuid_version. The code to extract and insert these bits mixes signed and unsigned. Not actually wrong, but avoiding such mixing is good practice. Visit them as unsigned integers instead. This adds a few mildly ugly cast in arguments of error_setg(). The next commit will get rid of them again. Property "tsc-frequency" is also visited as signed integer. The value ultimately flows into the kernel, where it is 31 bits unsigned. The QEMU code freely mixes int, uint32_t, int64_t. I elect not to attempt draining this swamp today. Signed-off-by: Markus Armbruster Message-ID: <20241010150144.986655-5-armbru@redhat.com> Reviewed-by: Daniel P. Berrang=C3=A9 Reviewed-by: Igor Mammedov --- target/i386/cpu.c | 45 +++++++++++++++++++++------------------------ 1 file changed, 21 insertions(+), 24 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 0d30191482..cd0dfd03fd 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -5433,13 +5433,13 @@ static void x86_cpuid_version_get_family(Object *ob= j, Visitor *v, { X86CPU *cpu =3D X86_CPU(obj); CPUX86State *env =3D &cpu->env; - int64_t value; + uint64_t value; =20 value =3D (env->cpuid_version >> 8) & 0xf; if (value =3D=3D 0xf) { value +=3D (env->cpuid_version >> 20) & 0xff; } - visit_type_int(v, name, &value, errp); + visit_type_uint64(v, name, &value, errp); } =20 static void x86_cpuid_version_set_family(Object *obj, Visitor *v, @@ -5448,16 +5448,15 @@ static void x86_cpuid_version_set_family(Object *ob= j, Visitor *v, { X86CPU *cpu =3D X86_CPU(obj); CPUX86State *env =3D &cpu->env; - const int64_t min =3D 0; - const int64_t max =3D 0xff + 0xf; - int64_t value; + const uint64_t max =3D 0xff + 0xf; + uint64_t value; =20 - if (!visit_type_int(v, name, &value, errp)) { + if (!visit_type_uint64(v, name, &value, errp)) { return; } - if (value < min || value > max) { + if (value > max) { error_setg(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE, "", - name ? name : "null", value, min, max); + name ? name : "null", value, (int64_t)0, (int64_t)max); return; } =20 @@ -5475,11 +5474,11 @@ static void x86_cpuid_version_get_model(Object *obj= , Visitor *v, { X86CPU *cpu =3D X86_CPU(obj); CPUX86State *env =3D &cpu->env; - int64_t value; + uint64_t value; =20 value =3D (env->cpuid_version >> 4) & 0xf; value |=3D ((env->cpuid_version >> 16) & 0xf) << 4; - visit_type_int(v, name, &value, errp); + visit_type_uint64(v, name, &value, errp); } =20 static void x86_cpuid_version_set_model(Object *obj, Visitor *v, @@ -5488,16 +5487,15 @@ static void x86_cpuid_version_set_model(Object *obj= , Visitor *v, { X86CPU *cpu =3D X86_CPU(obj); CPUX86State *env =3D &cpu->env; - const int64_t min =3D 0; - const int64_t max =3D 0xff; - int64_t value; + const uint64_t max =3D 0xff; + uint64_t value; =20 - if (!visit_type_int(v, name, &value, errp)) { + if (!visit_type_uint64(v, name, &value, errp)) { return; } - if (value < min || value > max) { + if (value > max) { error_setg(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE, "", - name ? name : "null", value, min, max); + name ? name : "null", value, (int64_t)0, (int64_t)max); return; } =20 @@ -5511,10 +5509,10 @@ static void x86_cpuid_version_get_stepping(Object *= obj, Visitor *v, { X86CPU *cpu =3D X86_CPU(obj); CPUX86State *env =3D &cpu->env; - int64_t value; + uint64_t value; =20 value =3D env->cpuid_version & 0xf; - visit_type_int(v, name, &value, errp); + visit_type_uint64(v, name, &value, errp); } =20 static void x86_cpuid_version_set_stepping(Object *obj, Visitor *v, @@ -5523,16 +5521,15 @@ static void x86_cpuid_version_set_stepping(Object *= obj, Visitor *v, { X86CPU *cpu =3D X86_CPU(obj); CPUX86State *env =3D &cpu->env; - const int64_t min =3D 0; - const int64_t max =3D 0xf; - int64_t value; + const uint64_t max =3D 0xf; + uint64_t value; =20 - if (!visit_type_int(v, name, &value, errp)) { + if (!visit_type_uint64(v, name, &value, errp)) { return; } - if (value < min || value > max) { + if (value > max) { error_setg(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE, "", - name ? name : "null", value, min, max); + name ? name : "null", value, (int64_t)0, (int64_t)max); return; } =20 --=20 2.46.0