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Mon, 9 Mar 2020 23:52:59 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userp3020.oracle.com with ESMTP id 2ymnb1karr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 09 Mar 2020 23:52:59 +0000 Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 029NqiWu008509; Mon, 9 Mar 2020 23:52:44 GMT Received: from spark.ravello.local (/213.57.127.2) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 09 Mar 2020 16:52:43 -0700 From: Liran Alon To: qemu-devel@nongnu.org Subject: [PATCH 12/14] i386/cpu: Store LAPIC bus frequency in CPU structure Date: Tue, 10 Mar 2020 01:54:09 +0200 Message-Id: <20200309235411.76587-13-liran.alon@oracle.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200309235411.76587-1-liran.alon@oracle.com> References: <20200309235411.76587-1-liran.alon@oracle.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9555 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 mlxscore=0 mlxlogscore=999 spamscore=0 suspectscore=1 adultscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2003090144 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9555 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 impostorscore=0 mlxlogscore=999 suspectscore=1 priorityscore=1501 lowpriorityscore=0 phishscore=0 adultscore=0 spamscore=0 mlxscore=0 clxscore=1015 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2003090143 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 156.151.31.85 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ehabkost@redhat.com, mst@redhat.com, Liran Alon , Nikita Leshenko , pbonzini@redhat.com, rth@twiddle.net Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" No functional change. This information will be used by following patches. Reviewed-by: Nikita Leshenko Signed-off-by: Liran Alon --- linux-headers/asm-x86/kvm.h | 4 ++++ target/i386/cpu.h | 1 + target/i386/kvm.c | 6 +++--- 3 files changed, 8 insertions(+), 3 deletions(-) diff --git a/linux-headers/asm-x86/kvm.h b/linux-headers/asm-x86/kvm.h index 503d3f42da16..99eeaaf2f0b4 100644 --- a/linux-headers/asm-x86/kvm.h +++ b/linux-headers/asm-x86/kvm.h @@ -446,4 +446,8 @@ struct kvm_pmu_event_filter { #define KVM_PMU_EVENT_ALLOW 0 #define KVM_PMU_EVENT_DENY 1 +/* From arch/x86/kvm/lapic.h */ +#define KVM_APIC_BUS_CYCLE_NS 1 +#define KVM_APIC_BUS_FREQUENCY (1000000000ULL / KVM_APIC_BUS_CYCLE_NS) + #endif /* _ASM_X86_KVM_H */ diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 576f309bbfc8..9c7cd7cde107 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -1580,6 +1580,7 @@ typedef struct CPUX86State { bool tsc_valid; int64_t tsc_khz; int64_t user_tsc_khz; /* for sanity check only */ + uint64_t apic_bus_freq; #if defined(CONFIG_KVM) || defined(CONFIG_HVF) void *xsave_buf; #endif diff --git a/target/i386/kvm.c b/target/i386/kvm.c index 69eb43d796e6..00917196dffb 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -1496,6 +1496,8 @@ int kvm_arch_init_vcpu(CPUState *cs) } } + env->apic_bus_freq = KVM_APIC_BUS_FREQUENCY; + /* Paravirtualization CPUIDs */ r = hyperv_handle_properties(cs, cpuid_data.entries); if (r < 0) { @@ -1800,9 +1802,7 @@ int kvm_arch_init_vcpu(CPUState *cs) c = &cpuid_data.entries[cpuid_i++]; c->function = KVM_CPUID_SIGNATURE | 0x10; c->eax = env->tsc_khz; - /* LAPIC resolution of 1ns (freq: 1GHz) is hardcoded in KVM's - * APIC_BUS_CYCLE_NS */ - c->ebx = 1000000; + c->ebx = env->apic_bus_freq / 1000; /* Hz to KHz */ c->ecx = c->edx = 0; c = cpuid_find_entry(&cpuid_data.cpuid, kvm_base, 0); -- 2.20.1