On 05.02.21 14:00, Jan Beulich wrote:
On 05.02.2021 11:56, Jürgen Groß wrote:
As we need to consider backports of processor bug mitigations
in old guests, too, I think we need to have a "catch-all"
fallback.
Not being able to run an old updated guest until we add handling
for a new MSR isn't a
On 05.02.2021 12:32, Andrew Cooper wrote:
> On 05/02/2021 10:56, Jürgen Groß wrote:
>> On 05.02.21 11:14, Jan Beulich wrote:
>>> On 04.11.2020 11:50, Jan Beulich wrote:
On 03.11.2020 18:31, Andrew Cooper wrote:
> We should have the impacted MSRs handled explicitly, with a note
> statin
On 05.02.2021 11:56, Jürgen Groß wrote:
> As we need to consider backports of processor bug mitigations
> in old guests, too, I think we need to have a "catch-all"
> fallback.
>
> Not being able to run an old updated guest until we add handling
> for a new MSR isn't a viable option IMO.
I'm not s
On Fri, Feb 05, 2021 at 11:32:07AM +, Andrew Cooper wrote:
> On 05/02/2021 10:56, Jürgen Groß wrote:
> > On 05.02.21 11:14, Jan Beulich wrote:
> >> (simply re-sending what was sent over 2 months ago)
> >>
> >> On 04.11.2020 11:50, Jan Beulich wrote:
> >>> On 03.11.2020 18:31, Andrew Cooper wrot
On 05.02.21 12:32, Andrew Cooper wrote:
On 05/02/2021 10:56, Jürgen Groß wrote:
On 05.02.21 11:14, Jan Beulich wrote:
(simply re-sending what was sent over 2 months ago)
On 04.11.2020 11:50, Jan Beulich wrote:
On 03.11.2020 18:31, Andrew Cooper wrote:
On 03/11/2020 17:06, Jan Beulich wrote:
On 05/02/2021 10:56, Jürgen Groß wrote:
> On 05.02.21 11:14, Jan Beulich wrote:
>> (simply re-sending what was sent over 2 months ago)
>>
>> On 04.11.2020 11:50, Jan Beulich wrote:
>>> On 03.11.2020 18:31, Andrew Cooper wrote:
On 03/11/2020 17:06, Jan Beulich wrote:
> Prior to 4.15 Linux,
On 05.02.21 11:14, Jan Beulich wrote:
(simply re-sending what was sent over 2 months ago)
On 04.11.2020 11:50, Jan Beulich wrote:
On 03.11.2020 18:31, Andrew Cooper wrote:
On 03/11/2020 17:06, Jan Beulich wrote:
Prior to 4.15 Linux, when running in PV mode, did not install a #GP
handler early
(simply re-sending what was sent over 2 months ago)
On 04.11.2020 11:50, Jan Beulich wrote:
> On 03.11.2020 18:31, Andrew Cooper wrote:
>> On 03/11/2020 17:06, Jan Beulich wrote:
>>> Prior to 4.15 Linux, when running in PV mode, did not install a #GP
>>> handler early enough to cover for example t
On 04.11.2020 11:50, Jan Beulich wrote:
> On 03.11.2020 18:31, Andrew Cooper wrote:
>> On 03/11/2020 17:06, Jan Beulich wrote:
>>> Prior to 4.15 Linux, when running in PV mode, did not install a #GP
>>> handler early enough to cover for example the rdmsrl_safe() of
>>> MSR_K8_TSEG_ADDR in bsp_init_
On 03.11.2020 18:31, Andrew Cooper wrote:
> On 03/11/2020 17:06, Jan Beulich wrote:
>> Prior to 4.15 Linux, when running in PV mode, did not install a #GP
>> handler early enough to cover for example the rdmsrl_safe() of
>> MSR_K8_TSEG_ADDR in bsp_init_amd() (not to speak of the unguarded read
>> o
On 03/11/2020 17:06, Jan Beulich wrote:
> Prior to 4.15 Linux, when running in PV mode, did not install a #GP
> handler early enough to cover for example the rdmsrl_safe() of
> MSR_K8_TSEG_ADDR in bsp_init_amd() (not to speak of the unguarded read
> of MSR_K7_HWCR later in the same function). The r
Prior to 4.15 Linux, when running in PV mode, did not install a #GP
handler early enough to cover for example the rdmsrl_safe() of
MSR_K8_TSEG_ADDR in bsp_init_amd() (not to speak of the unguarded read
of MSR_K7_HWCR later in the same function). The respective change
(42b3a4cb5609 "x86/xen: Support
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