Hi Roger, > On Oct 6, 2023, at 17:13, Roger Pau Monne <[email protected]> wrote: > > XENFEAT_runstate_phys_area is exposed to all architectures, while > XENFEAT_vcpu_time_phys_area is currnelty only implemented for x86, and hence > the feature flag is also only exposed on x86. > > Signed-off-by: Roger Pau Monné <[email protected]>
Release-acked-by: Henry Wang <[email protected]> Kind regards, Henry > --- > CHANGELOG.md | 2 ++ > xen/common/kernel.c | 6 +++++- > xen/include/public/features.h | 9 +++++++++ > 3 files changed, 16 insertions(+), 1 deletion(-) > > diff --git a/CHANGELOG.md b/CHANGELOG.md > index e33cf4e1b113..41da710426f6 100644 > --- a/CHANGELOG.md > +++ b/CHANGELOG.md > @@ -31,6 +31,8 @@ The format is based on [Keep a > Changelog](https://keepachangelog.com/en/1.0.0/) > - Add Intel Hardware P-States (HWP) cpufreq driver. > - On Arm, experimental support for dynamic addition/removal of Xen device > tree > nodes using a device tree overlay binary (.dtbo). > + - Introduce two new hypercalls to map the vCPU runstate and time areas by > + physical rather than linear addresses. > > ### Removed > - On x86, the "pku" command line option has been removed. It has never > diff --git a/xen/common/kernel.c b/xen/common/kernel.c > index 52aa28762782..b6302e44b34e 100644 > --- a/xen/common/kernel.c > +++ b/xen/common/kernel.c > @@ -607,7 +607,11 @@ long do_xen_version(int cmd, > XEN_GUEST_HANDLE_PARAM(void) arg) > switch ( fi.submap_idx ) > { > case 0: > - fi.submap = (1U << XENFEAT_memory_op_vnode_supported); > + fi.submap = (1U << XENFEAT_memory_op_vnode_supported) | > +#ifdef CONFIG_X86 > + (1U << XENFEAT_vcpu_time_phys_area) | > +#endif > + (1U << XENFEAT_runstate_phys_area); > if ( VM_ASSIST(d, pae_extended_cr3) ) > fi.submap |= (1U << XENFEAT_pae_pgdir_above_4gb); > if ( paging_mode_translate(d) ) > diff --git a/xen/include/public/features.h b/xen/include/public/features.h > index d2a9175aae67..cffb2f14a562 100644 > --- a/xen/include/public/features.h > +++ b/xen/include/public/features.h > @@ -111,6 +111,15 @@ > #define XENFEAT_not_direct_mapped 16 > #define XENFEAT_direct_mapped 17 > > +/* > + * Signal whether the hypervisor implements the following hypercalls: > + * > + * VCPUOP_register_runstate_phys_area > + * VCPUOP_register_vcpu_time_phys_area > + */ > +#define XENFEAT_runstate_phys_area 18 > +#define XENFEAT_vcpu_time_phys_area 19 > + > #define XENFEAT_NR_SUBMAPS 1 > > #endif /* __XEN_PUBLIC_FEATURES_H__ */ > -- > 2.42.0 >
