Re: [PATCH] Fixed KVM problems with old DOS programs. Compatibility can be forced by module parameter.

On 04.11.2015 23:04, Paolo Bonzini wrote: On 04/11/2015 22:33, Gerhard Wiesinger wrote: What is the problem you are seeing? KVM can emulate task switches; the intercept is set here because of a processor erratum that can mess them up even though, in theory, AMD supports task switching from

Re: [PATCH] Fixed KVM problems with old DOS programs. Compatibility can be forced by module parameter.

On 05/11/2015 17:07, Gerhard Wiesinger wrote: >> > > ./trace-cmd record -b 2 -e kvm > ./trace-cmd report | grep -i task_switch > qemu-system-x86-6024 [001] 792774.719297: kvm_exit: reason task_switch > rip 0x4883 info 158 40 0x158 is the segment selector of the incoming TSS, and

Re: [PATCH] Fixed KVM problems with old DOS programs. Compatibility can be forced by module parameter.

On 05/11/2015 17:15, Paolo Bonzini wrote: > > > On 05/11/2015 17:07, Gerhard Wiesinger wrote: >>> >> >> ./trace-cmd record -b 2 -e kvm >> ./trace-cmd report | grep -i task_switch >> qemu-system-x86-6024 [001] 792774.719297: kvm_exit: reason task_switch >> rip 0x4883 info 158 40 >

Re: [PATCH] Fixed KVM problems with old DOS programs. Compatibility can be forced by module parameter.

On 04/11/2015 22:33, Gerhard Wiesinger wrote: >>> >> What is the problem you are seeing? KVM can emulate task switches; the >> intercept is set here because of a processor erratum that can mess them >> up even though, in theory, AMD supports task switching from guest mode. > > See old thread:

Re: [PATCH] Fixed KVM problems with old DOS programs. Compatibility can be forced by module parameter.

On 04.11.2015 22:27, Paolo Bonzini wrote: On 04/11/2015 20:33, Gerhard Wiesinger wrote: Signed-off-by: Gerhard Wiesinger --- arch/x86/kvm/svm.c | 7 +++ 1 file changed, 7 insertions(+) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 2f9ed1f..e0b00fc

Re: [PATCH] Fixed KVM problems with old DOS programs. Compatibility can be forced by module parameter.

On 04/11/2015 20:33, Gerhard Wiesinger wrote: > Signed-off-by: Gerhard Wiesinger > --- > arch/x86/kvm/svm.c | 7 +++ > 1 file changed, 7 insertions(+) > > diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c > index 2f9ed1f..e0b00fc 100644 > --- a/arch/x86/kvm/svm.c >