Re: [Xen-devel] [PATCH] x86/hvm: Disallow moving the APIC MMIO window

2018-12-10 Thread Roger Pau Monné
On Mon, Dec 10, 2018 at 04:20:07PM +, Andrew Cooper wrote: > On 10/12/2018 16:14, Roger Pau Monné wrote: > > On Mon, Dec 10, 2018 at 11:45:13AM +, Andrew Cooper wrote: > >> See the code comment for a full discussion, but in short: guests which > >> currently run under Xen don't move the

Re: [Xen-devel] [PATCH] x86/hvm: Disallow moving the APIC MMIO window

2018-12-10 Thread Andrew Cooper
On 10/12/2018 16:14, Roger Pau Monné wrote: > On Mon, Dec 10, 2018 at 11:45:13AM +, Andrew Cooper wrote: >> See the code comment for a full discussion, but in short: guests which >> currently run under Xen don't move the window, because moving it has never >> worked properly. Implementing

Re: [Xen-devel] [PATCH] x86/hvm: Disallow moving the APIC MMIO window

2018-12-10 Thread Roger Pau Monné
On Mon, Dec 10, 2018 at 11:45:13AM +, Andrew Cooper wrote: > See the code comment for a full discussion, but in short: guests which > currently run under Xen don't move the window, because moving it has never > worked properly. Implementing support for moving the window is never going to >

[Xen-devel] [PATCH] x86/hvm: Disallow moving the APIC MMIO window

2018-12-10 Thread Andrew Cooper
See the code comment for a full discussion, but in short: guests which currently run under Xen don't move the window, because moving it has never worked properly. Implementing support for moving the window is never going to work architecturally unless we switch to per-vcpu P2Ms (which seems very