On 2019/1/29 19:15, Jan Beulich wrote:
Pu Wen 12/20/18 2:16 PM >>>
>> --- a/xen/arch/x86/xstate.c
>> +++ b/xen/arch/x86/xstate.c
>> @@ -369,7 +369,7 @@ void xrstor(struct vcpu *v, uint64_t mask)
>> unsigned int faults, prev_faults;
> >
>> /*
>> - * AMD CPUs don't save/restore FDP/FIP/FO
>>> Pu Wen 12/20/18 2:16 PM >>>
>--- a/xen/arch/x86/xstate.c
>+++ b/xen/arch/x86/xstate.c
>@@ -369,7 +369,7 @@ void xrstor(struct vcpu *v, uint64_t mask)
>unsigned int faults, prev_faults;
>
>/*
>- * AMD CPUs don't save/restore FDP/FIP/FOP unless an exception
>+ * AMD or Hygon CPUs don't
On 2018/12/28 6:41, Andrew Cooper wrote:
> On 20/12/2018 13:15, Pu Wen wrote:
>> The Hygon Dhyana CPU don't save/restore FDP/FIP/FOP unless an exception
>> is pending. So add support for it in the function xrstor.
>
> Really?
>
> Zen was the first AMD processor to fix this (mis)feature, and the X
On 20/12/2018 13:15, Pu Wen wrote:
> The Hygon Dhyana CPU don't save/restore FDP/FIP/FOP unless an exception
> is pending. So add support for it in the function xrstor.
Really?
Zen was the first AMD processor to fix this (mis)feature, and the Xen
code doesn't appear to have caught up yet.
I'm pu
The Hygon Dhyana CPU don't save/restore FDP/FIP/FOP unless an exception
is pending. So add support for it in the function xrstor.
Signed-off-by: Pu Wen
---
xen/arch/x86/xstate.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/xen/arch/x86/xstate.c b/xen/arch/x86/xstate.c
