Re: [PATCH v3 2/2] kvm/arm64: Try stage2 block mapping for host device MMIO

2021-04-15 Thread Marc Zyngier
On Thu, 15 Apr 2021 12:26:26 +0100, Keqian Zhu wrote: > > Hi Marc, > > On 2021/4/15 18:23, Marc Zyngier wrote: > > On Thu, 15 Apr 2021 03:20:52 +0100, > > Keqian Zhu wrote: > >> > >> Hi Marc, > >> > >> On 2021/4/14 17:05, Marc Zyngier wrote: > >>> + Santosh, who found some interesting bugs in t

Re: [PATCH v3 2/2] kvm/arm64: Try stage2 block mapping for host device MMIO

2021-04-15 Thread Keqian Zhu
Hi Marc, On 2021/4/15 18:23, Marc Zyngier wrote: > On Thu, 15 Apr 2021 03:20:52 +0100, > Keqian Zhu wrote: >> >> Hi Marc, >> >> On 2021/4/14 17:05, Marc Zyngier wrote: >>> + Santosh, who found some interesting bugs in that area before. >>> >>> On Wed, 14 Apr 2021 07:51:09 +0100, >>> Keqian Zhu w

Re: [PATCH v3 2/2] kvm/arm64: Try stage2 block mapping for host device MMIO

2021-04-15 Thread Marc Zyngier
On Thu, 15 Apr 2021 03:20:52 +0100, Keqian Zhu wrote: > > Hi Marc, > > On 2021/4/14 17:05, Marc Zyngier wrote: > > + Santosh, who found some interesting bugs in that area before. > > > > On Wed, 14 Apr 2021 07:51:09 +0100, > > Keqian Zhu wrote: > >> > >> The MMIO region of a device maybe huge

Re: [PATCH v3 2/2] kvm/arm64: Try stage2 block mapping for host device MMIO

2021-04-14 Thread Keqian Zhu
Hi Marc, On 2021/4/14 17:05, Marc Zyngier wrote: > + Santosh, who found some interesting bugs in that area before. > > On Wed, 14 Apr 2021 07:51:09 +0100, > Keqian Zhu wrote: >> >> The MMIO region of a device maybe huge (GB level), try to use >> block mapping in stage2 to speedup both map and un

Re: [PATCH v3 2/2] kvm/arm64: Try stage2 block mapping for host device MMIO

2021-04-14 Thread Marc Zyngier
+ Santosh, who found some interesting bugs in that area before. On Wed, 14 Apr 2021 07:51:09 +0100, Keqian Zhu wrote: > > The MMIO region of a device maybe huge (GB level), try to use > block mapping in stage2 to speedup both map and unmap. > > Compared to normal memory mapping, we should consi

[PATCH v3 2/2] kvm/arm64: Try stage2 block mapping for host device MMIO

2021-04-13 Thread Keqian Zhu
The MMIO region of a device maybe huge (GB level), try to use block mapping in stage2 to speedup both map and unmap. Compared to normal memory mapping, we should consider two more points when try block mapping for MMIO region: 1. For normal memory mapping, the PA(host physical address) and HVA ha