From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: [PATCH 1/1] kvm: Fix eflags corruption in kvm mode Date: Tue, 23 Feb 2010 16:54:29 +0200 Message-ID: <1266936869-9700-2-git-send-email-avi@redhat.com> References: <1266936869-9700-1-git-send-email-avi@redhat.com> Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org To: Anthony Liguori Return-path: Received: from mx1.redhat.com ([209.132.183.28]:3979 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752667Ab0BWOye (ORCPT ); Tue, 23 Feb 2010 09:54:34 -0500 In-Reply-To: <1266936869-9700-1-git-send-email-avi@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: From: Jan Kiszka This should explain a lot of the weird breakages of upstream KVM we've seen recently (actually we should have seen it much earlier): Stop translating eflags into TCG format when in kvm mode as we never translate it back and rather sync this broken state into the kernel. Signed-off-by: Jan Kiszka Signed-off-by: Avi Kivity --- cpu-exec.c | 12 +++++++----- 1 files changed, 7 insertions(+), 5 deletions(-) diff --git a/cpu-exec.c b/cpu-exec.c index af4595b..3246c9e 100644 --- a/cpu-exec.c +++ b/cpu-exec.c @@ -232,11 +232,13 @@ int cpu_exec(CPUState *env1) env_to_regs(); #if defined(TARGET_I386) - /* put eflags in CPU temporary format */ - CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); - DF = 1 - (2 * ((env->eflags >> 10) & 1)); - CC_OP = CC_OP_EFLAGS; - env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); + if (!kvm_enabled()) { + /* put eflags in CPU temporary format */ + CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); + DF = 1 - (2 * ((env->eflags >> 10) & 1)); + CC_OP = CC_OP_EFLAGS; + env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); + } #elif defined(TARGET_SPARC) #elif defined(TARGET_M68K) env->cc_op = CC_OP_FLAGS; -- 1.7.0