Re: Why invtsc (CPUID_APM_INVTSC) is unmigratable?

2024-01-29 Thread Marcelo Tosatti
On Fri, Jan 26, 2024 at 04:16:57PM +0800, Xiaoyao Li wrote: > On 1/25/2024 6:05 AM, Marcelo Tosatti wrote: > > On Wed, Jan 24, 2024 at 10:52:46PM +0800, Xiaoyao Li wrote: > > > On 1/23/2024 11:39 PM, Marcelo Tosatti wrote: > > > > On Sat, Jan 20, 2024 at 05:44:07PM +0800, Xiaoyao Li wrote: > > > >

Re: Why invtsc (CPUID_APM_INVTSC) is unmigratable?

2024-01-26 Thread Xiaoyao Li
On 1/25/2024 6:05 AM, Marcelo Tosatti wrote: On Wed, Jan 24, 2024 at 10:52:46PM +0800, Xiaoyao Li wrote: On 1/23/2024 11:39 PM, Marcelo Tosatti wrote: On Sat, Jan 20, 2024 at 05:44:07PM +0800, Xiaoyao Li wrote: On 1/20/2024 12:14 AM, Marcelo Tosatti wrote: On Fri, Jan 19, 2024 at 02:46:22PM

Re: Why invtsc (CPUID_APM_INVTSC) is unmigratable?

2024-01-24 Thread Marcelo Tosatti
On Wed, Jan 24, 2024 at 10:52:46PM +0800, Xiaoyao Li wrote: > On 1/23/2024 11:39 PM, Marcelo Tosatti wrote: > > On Sat, Jan 20, 2024 at 05:44:07PM +0800, Xiaoyao Li wrote: > > > On 1/20/2024 12:14 AM, Marcelo Tosatti wrote: > > > > On Fri, Jan 19, 2024 at 02:46:22PM +0800, Xiaoyao Li wrote: > > >

Re: Why invtsc (CPUID_APM_INVTSC) is unmigratable?

2024-01-24 Thread Xiaoyao Li
On 1/23/2024 11:39 PM, Marcelo Tosatti wrote: On Sat, Jan 20, 2024 at 05:44:07PM +0800, Xiaoyao Li wrote: On 1/20/2024 12:14 AM, Marcelo Tosatti wrote: On Fri, Jan 19, 2024 at 02:46:22PM +0800, Xiaoyao Li wrote: I'm wondering why CPUID_APM_INVTSC is set as unmigratable_flags. Could anyone

Re: Why invtsc (CPUID_APM_INVTSC) is unmigratable?

2024-01-23 Thread Marcelo Tosatti
On Sat, Jan 20, 2024 at 05:44:07PM +0800, Xiaoyao Li wrote: > On 1/20/2024 12:14 AM, Marcelo Tosatti wrote: > > On Fri, Jan 19, 2024 at 02:46:22PM +0800, Xiaoyao Li wrote: > > > I'm wondering why CPUID_APM_INVTSC is set as unmigratable_flags. Could > > > anyone explain it? > > > > > > commit

Re: Why invtsc (CPUID_APM_INVTSC) is unmigratable?

2024-01-20 Thread Xiaoyao Li
On 1/20/2024 12:14 AM, Marcelo Tosatti wrote: On Fri, Jan 19, 2024 at 02:46:22PM +0800, Xiaoyao Li wrote: I'm wondering why CPUID_APM_INVTSC is set as unmigratable_flags. Could anyone explain it? commit 68bfd0ad4a1dcc4c328d5db85dc746b49c1ec07e Author: Marcelo Tosatti Date: Wed May 14

Re: Why invtsc (CPUID_APM_INVTSC) is unmigratable?

2024-01-19 Thread Marcelo Tosatti
On Fri, Jan 19, 2024 at 02:46:22PM +0800, Xiaoyao Li wrote: > I'm wondering why CPUID_APM_INVTSC is set as unmigratable_flags. Could > anyone explain it? commit 68bfd0ad4a1dcc4c328d5db85dc746b49c1ec07e Author: Marcelo Tosatti Date: Wed May 14 16:30:09 2014 -0300 target-i386: block

Why invtsc (CPUID_APM_INVTSC) is unmigratable?

2024-01-18 Thread Xiaoyao Li
I'm wondering why CPUID_APM_INVTSC is set as unmigratable_flags. Could anyone explain it? When the host supports invtsc, it can be exposed to guest. When the src VM has invtsc exposed, what will forbid it to be migrated to a dest that also supports VMs with invtsc exposed?