From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48259) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zo5y4-0001Y7-Gv for qemu-devel@nongnu.org; Mon, 19 Oct 2015 04:38:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zo5y3-0004sK-H7 for qemu-devel@nongnu.org; Mon, 19 Oct 2015 04:38:56 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41215) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zo5y3-0004sA-7j for qemu-devel@nongnu.org; Mon, 19 Oct 2015 04:38:55 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (Postfix) with ESMTPS id EEB0FFA9C2 for ; Mon, 19 Oct 2015 08:38:54 +0000 (UTC) From: Paolo Bonzini Date: Mon, 19 Oct 2015 10:38:48 +0200 Message-Id: <1445243928-22978-4-git-send-email-pbonzini@redhat.com> In-Reply-To: <1445243928-22978-1-git-send-email-pbonzini@redhat.com> References: <1445243928-22978-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PULL 49/49] kvm: Allow the Hyper-V vendor ID to be specified List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Alex Williamson From: Alex Williamson According to Microsoft documentation, the signature in the standard hypervisor CPUID leaf at 0x40000000 identifies the Vendor ID and is for reporting and diagnostic purposes only. We can therefore allow the user to change it to whatever they want, within the 12 character limit. Add a new hv-vendor-id option to the -cpu flag to allow for this, ex: -cpu host,hv_time,hv-vendor-id=KeenlyKVM Link: http://msdn.microsoft.com/library/windows/hardware/hh975392 Signed-off-by: Alex Williamson Message-Id: <20151016153356.28104.48612.stgit@gimli.home> [Adjust error message to match the property name, use error_report. - Paolo] Signed-off-by: Paolo Bonzini --- target-i386/cpu-qom.h | 1 + target-i386/cpu.c | 1 + target-i386/kvm.c | 14 +++++++++++++- 3 files changed, 15 insertions(+), 1 deletion(-) diff --git a/target-i386/cpu-qom.h b/target-i386/cpu-qom.h index 9eab41b..e3bfe9d 100644 --- a/target-i386/cpu-qom.h +++ b/target-i386/cpu-qom.h @@ -88,6 +88,7 @@ typedef struct X86CPU { bool hyperv_vapic; bool hyperv_relaxed_timing; int hyperv_spinlock_attempts; + char *hyperv_vendor_id; bool hyperv_time; bool hyperv_crash; bool hyperv_reset; diff --git a/target-i386/cpu.c b/target-i386/cpu.c index d2b0619..5f53af2 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -3149,6 +3149,7 @@ static Property x86_cpu_properties[] = { DEFINE_PROP_UINT32("level", X86CPU, env.cpuid_level, 0), DEFINE_PROP_UINT32("xlevel", X86CPU, env.cpuid_xlevel, 0), DEFINE_PROP_UINT32("xlevel2", X86CPU, env.cpuid_xlevel2, 0), + DEFINE_PROP_STRING("hv-vendor-id", X86CPU, hyperv_vendor_id), DEFINE_PROP_END_OF_LIST() }; diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 010ac51..64046cb 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -28,6 +28,7 @@ #include "exec/gdbstub.h" #include "qemu/host-utils.h" #include "qemu/config-file.h" +#include "qemu/error-report.h" #include "hw/i386/pc.h" #include "hw/i386/apic.h" #include "hw/i386/apic_internal.h" @@ -505,7 +506,18 @@ int kvm_arch_init_vcpu(CPUState *cs) if (hyperv_enabled(cpu)) { c = &cpuid_data.entries[cpuid_i++]; c->function = HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS; - memcpy(signature, "Microsoft Hv", 12); + if (!cpu->hyperv_vendor_id) { + memcpy(signature, "Microsoft Hv", 12); + } else { + size_t len = strlen(cpu->hyperv_vendor_id); + + if (len > 12) { + error_report("hv-vendor-id truncated to 12 characters"); + len = 12; + } + memset(signature, 0, 12); + memcpy(signature, cpu->hyperv_vendor_id, len); + } c->eax = HYPERV_CPUID_MIN; c->ebx = signature[0]; c->ecx = signature[1]; -- 2.5.0