From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60738) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1alNDR-0003uQ-QF for qemu-devel@nongnu.org; Wed, 30 Mar 2016 16:59:50 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1alNDQ-0002Ke-7T for qemu-devel@nongnu.org; Wed, 30 Mar 2016 16:59:49 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53440) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1alNDQ-0002KZ-1p for qemu-devel@nongnu.org; Wed, 30 Mar 2016 16:59:48 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (Postfix) with ESMTPS id 9C7BF486A7 for ; Wed, 30 Mar 2016 20:59:47 +0000 (UTC) From: Paolo Bonzini Date: Wed, 30 Mar 2016 22:59:43 +0200 Message-Id: <1459371583-4824-2-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PATCH] target-i386: assert that KVM_GET/SET_MSRS can set all requested MSRs List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: ehabkost@redhat.com This would have caught the bug in the previous patch. Signed-off-by: Paolo Bonzini --- target-i386/kvm.c | 34 ++++++++++++++++++++++++++++++---- 1 file changed, 30 insertions(+), 4 deletions(-) diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 19e2d94..799fdfa 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -141,6 +141,7 @@ static int kvm_get_tsc(CPUState *cs) return ret; } + assert(ret == 1); env->tsc = msr_data.entries[0].data; return 0; } @@ -1446,6 +1447,7 @@ static int kvm_put_tscdeadline_msr(X86CPU *cpu) struct kvm_msr_entry entries[1]; } msr_data; struct kvm_msr_entry *msrs = msr_data.entries; + int ret; if (!has_msr_tsc_deadline) { return 0; @@ -1457,7 +1459,13 @@ static int kvm_put_tscdeadline_msr(X86CPU *cpu) .nmsrs = 1, }; - return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, &msr_data); + ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, &msr_data); + if (ret < 0) { + return ret; + } + + assert(ret == 1); + return 0; } /* @@ -1472,6 +1480,11 @@ static int kvm_put_msr_feature_control(X86CPU *cpu) struct kvm_msrs info; struct kvm_msr_entry entry; } msr_data; + int ret; + + if (!has_msr_feature_control) { + return 0; + } kvm_msr_entry_set(&msr_data.entry, MSR_IA32_FEATURE_CONTROL, cpu->env.msr_ia32_feature_control); @@ -1480,7 +1493,13 @@ static int kvm_put_msr_feature_control(X86CPU *cpu) .nmsrs = 1, }; - return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, &msr_data); + ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, &msr_data); + if (ret < 0) { + return ret; + } + + assert(ret == 1); + return 0; } static int kvm_put_msrs(X86CPU *cpu, int level) @@ -1492,6 +1511,7 @@ static int kvm_put_msrs(X86CPU *cpu, int level) } msr_data; struct kvm_msr_entry *msrs = msr_data.entries; int n = 0, i; + int ret; kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_CS, env->sysenter_cs); kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_ESP, env->sysenter_esp); @@ -1685,8 +1705,13 @@ static int kvm_put_msrs(X86CPU *cpu, int level) .nmsrs = n, }; - return kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, &msr_data); + ret = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MSRS, &msr_data); + if (ret < 0) { + return ret; + } + assert(ret == n); + return 0; } @@ -2055,6 +2080,7 @@ static int kvm_get_msrs(X86CPU *cpu) return ret; } + assert(ret == n); for (i = 0; i < ret; i++) { uint32_t index = msrs[i].index; switch (index) { @@ -2511,7 +2537,7 @@ int kvm_arch_put_registers(CPUState *cpu, int level) assert(cpu_is_stopped(cpu) || qemu_cpu_is_self(cpu)); - if (level >= KVM_PUT_RESET_STATE && has_msr_feature_control) { + if (level >= KVM_PUT_RESET_STATE) { ret = kvm_put_msr_feature_control(x86_cpu); if (ret < 0) { return ret; -- 2.5.5