From: Andrii Anisov <andrii.anisov@gmail.com> To: xen-devel@lists.xen.org Cc: "Stefano Stabellini" <sstabellini@kernel.org>, "Andrii Anisov" <andrii_anisov@epam.com>, "Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>, "George Dunlap" <George.Dunlap@eu.citrix.com>, "Andrew Cooper" <andrew.cooper3@citrix.com>, "Ian Jackson" <ian.jackson@eu.citrix.com>, "Tim Deegan" <tim@xen.org>, "Julien Grall" <julien.grall@arm.com>, "Jan Beulich" <jbeulich@suse.com>, xen-devel@lists.xenproject.org, "Wei Liu" <wei.liu2@citrix.com>, "Roger Pau Monné" <roger.pau@citrix.com> Subject: [PATCH v2 1/2] xen: introduce VCPUOP_register_runstate_phys_memory_area hypercall Date: Tue, 23 Apr 2019 11:10:25 +0300 [thread overview] Message-ID: <1556007026-31057-2-git-send-email-andrii.anisov@gmail.com> (raw) In-Reply-To: <1556007026-31057-1-git-send-email-andrii.anisov@gmail.com> From: Andrii Anisov <andrii_anisov@epam.com> The hypercall employs the same vcpu_register_runstate_memory_area structure for the interface, but requires registered area to not cross a page boundary. Signed-off-by: Andrii Anisov <andrii_anisov@epam.com> --- xen/common/domain.c | 5 ++++- xen/include/public/vcpu.h | 15 +++++++++++++++ 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/xen/common/domain.c b/xen/common/domain.c index 88bbe98..ae22049 100644 --- a/xen/common/domain.c +++ b/xen/common/domain.c @@ -1532,10 +1532,13 @@ long do_vcpu_op(int cmd, unsigned int vcpuid, XEN_GUEST_HANDLE_PARAM(void) arg) vcpu_runstate_get(v, &runstate); __copy_to_guest(runstate_guest(v), &runstate, 1); } - break; } + case VCPUOP_register_runstate_phys_memory_area: + rc = -EOPNOTSUPP; + break; + #ifdef VCPU_TRAP_NMI case VCPUOP_send_nmi: if ( !guest_handle_is_null(arg) ) diff --git a/xen/include/public/vcpu.h b/xen/include/public/vcpu.h index 3623af9..d7da4a3 100644 --- a/xen/include/public/vcpu.h +++ b/xen/include/public/vcpu.h @@ -235,6 +235,21 @@ struct vcpu_register_time_memory_area { typedef struct vcpu_register_time_memory_area vcpu_register_time_memory_area_t; DEFINE_XEN_GUEST_HANDLE(vcpu_register_time_memory_area_t); +/* + * Register a shared memory area from which the guest may obtain its own + * runstate information without needing to execute a hypercall. + * Notes: + * 1. The registered address must be guest's physical address. + * 2. The registered runstate area should not cross page boundary. + * 3. Only one shared area may be registered per VCPU. The shared area is + * updated by the hypervisor each time the VCPU is scheduled. Thus + * runstate.state will always be RUNSTATE_running and + * runstate.state_entry_time will indicate the system time at which the + * VCPU was last scheduled to run. + * @extra_arg == pointer to vcpu_register_runstate_memory_area structure. + */ +#define VCPUOP_register_runstate_phys_memory_area 14 + #endif /* __XEN_PUBLIC_VCPU_H__ */ /* -- 2.7.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
WARNING: multiple messages have this Message-ID (diff)
From: Andrii Anisov <andrii.anisov@gmail.com> To: xen-devel@lists.xen.org Cc: "Stefano Stabellini" <sstabellini@kernel.org>, "Andrii Anisov" <andrii_anisov@epam.com>, "Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>, "George Dunlap" <George.Dunlap@eu.citrix.com>, "Andrew Cooper" <andrew.cooper3@citrix.com>, "Ian Jackson" <ian.jackson@eu.citrix.com>, "Tim Deegan" <tim@xen.org>, "Julien Grall" <julien.grall@arm.com>, "Jan Beulich" <jbeulich@suse.com>, xen-devel@lists.xenproject.org, "Wei Liu" <wei.liu2@citrix.com>, "Roger Pau Monné" <roger.pau@citrix.com> Subject: [Xen-devel] [PATCH v2 1/2] xen: introduce VCPUOP_register_runstate_phys_memory_area hypercall Date: Tue, 23 Apr 2019 11:10:25 +0300 [thread overview] Message-ID: <1556007026-31057-2-git-send-email-andrii.anisov@gmail.com> (raw) Message-ID: <20190423081025.9BH9lsHvvDclPSz7A6ckZ700vEvb8xSrWbsY4Dv1jkU@z> (raw) In-Reply-To: <1556007026-31057-1-git-send-email-andrii.anisov@gmail.com> From: Andrii Anisov <andrii_anisov@epam.com> The hypercall employs the same vcpu_register_runstate_memory_area structure for the interface, but requires registered area to not cross a page boundary. Signed-off-by: Andrii Anisov <andrii_anisov@epam.com> --- xen/common/domain.c | 5 ++++- xen/include/public/vcpu.h | 15 +++++++++++++++ 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/xen/common/domain.c b/xen/common/domain.c index 88bbe98..ae22049 100644 --- a/xen/common/domain.c +++ b/xen/common/domain.c @@ -1532,10 +1532,13 @@ long do_vcpu_op(int cmd, unsigned int vcpuid, XEN_GUEST_HANDLE_PARAM(void) arg) vcpu_runstate_get(v, &runstate); __copy_to_guest(runstate_guest(v), &runstate, 1); } - break; } + case VCPUOP_register_runstate_phys_memory_area: + rc = -EOPNOTSUPP; + break; + #ifdef VCPU_TRAP_NMI case VCPUOP_send_nmi: if ( !guest_handle_is_null(arg) ) diff --git a/xen/include/public/vcpu.h b/xen/include/public/vcpu.h index 3623af9..d7da4a3 100644 --- a/xen/include/public/vcpu.h +++ b/xen/include/public/vcpu.h @@ -235,6 +235,21 @@ struct vcpu_register_time_memory_area { typedef struct vcpu_register_time_memory_area vcpu_register_time_memory_area_t; DEFINE_XEN_GUEST_HANDLE(vcpu_register_time_memory_area_t); +/* + * Register a shared memory area from which the guest may obtain its own + * runstate information without needing to execute a hypercall. + * Notes: + * 1. The registered address must be guest's physical address. + * 2. The registered runstate area should not cross page boundary. + * 3. Only one shared area may be registered per VCPU. The shared area is + * updated by the hypervisor each time the VCPU is scheduled. Thus + * runstate.state will always be RUNSTATE_running and + * runstate.state_entry_time will indicate the system time at which the + * VCPU was last scheduled to run. + * @extra_arg == pointer to vcpu_register_runstate_memory_area structure. + */ +#define VCPUOP_register_runstate_phys_memory_area 14 + #endif /* __XEN_PUBLIC_VCPU_H__ */ /* -- 2.7.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
next prev parent reply other threads:[~2019-04-23 8:10 UTC|newest] Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-04-23 8:10 [PATCH v2 0/2] Introduce runstate area registration with phys address Andrii Anisov 2019-04-23 8:10 ` Andrii Anisov [this message] 2019-04-23 8:10 ` [Xen-devel] [PATCH v2 1/2] xen: introduce VCPUOP_register_runstate_phys_memory_area hypercall Andrii Anisov 2019-05-08 10:10 ` George Dunlap 2019-05-08 10:10 ` [Xen-devel] " George Dunlap 2019-04-23 8:10 ` [PATCH v2 2/2] xen: implement VCPUOP_register_runstate_phys_memory_area Andrii Anisov 2019-04-23 8:10 ` [Xen-devel] " Andrii Anisov 2019-05-08 15:40 ` Julien Grall 2019-05-08 15:40 ` [Xen-devel] " Julien Grall 2019-05-09 9:27 ` Jan Beulich 2019-05-09 9:27 ` [Xen-devel] " Jan Beulich 2019-05-14 9:35 ` Julien Grall 2019-05-14 9:35 ` [Xen-devel] " Julien Grall 2019-05-14 9:48 ` Jan Beulich 2019-05-14 9:48 ` [Xen-devel] " Jan Beulich 2019-05-14 11:23 ` Julien Grall 2019-05-14 11:23 ` [Xen-devel] " Julien Grall 2019-05-14 11:29 ` Jan Beulich 2019-05-14 11:29 ` [Xen-devel] " Jan Beulich 2019-05-13 12:30 ` Andrii Anisov 2019-05-13 12:30 ` [Xen-devel] " Andrii Anisov 2019-05-14 9:58 ` Julien Grall 2019-05-14 9:58 ` [Xen-devel] " Julien Grall 2019-05-14 10:08 ` Andrii Anisov 2019-05-14 10:08 ` [Xen-devel] " Andrii Anisov 2019-05-14 11:24 ` Julien Grall 2019-05-14 11:24 ` [Xen-devel] " Julien Grall 2019-05-14 11:45 ` Andrii Anisov 2019-05-14 11:45 ` [Xen-devel] " Andrii Anisov 2019-05-14 12:02 ` Jan Beulich 2019-05-14 12:02 ` [Xen-devel] " Jan Beulich 2019-05-14 13:05 ` Andrii Anisov 2019-05-14 13:05 ` [Xen-devel] " Andrii Anisov 2019-05-14 13:49 ` Julien Grall 2019-05-14 13:49 ` [Xen-devel] " Julien Grall 2019-05-15 9:04 ` Andrii Anisov 2019-05-15 9:04 ` [Xen-devel] " Andrii Anisov 2019-05-15 10:31 ` Julien Grall 2019-05-15 10:31 ` [Xen-devel] " Julien Grall 2019-05-14 13:49 ` Jan Beulich 2019-05-14 13:49 ` [Xen-devel] " Jan Beulich 2019-05-15 8:44 ` Andrii Anisov 2019-05-15 8:44 ` [Xen-devel] " Andrii Anisov 2019-05-15 11:59 ` Jan Beulich 2019-05-15 11:59 ` [Xen-devel] " Jan Beulich 2019-05-16 12:09 ` Jan Beulich 2019-05-16 12:09 ` [Xen-devel] " Jan Beulich 2019-05-16 13:30 ` Andrii Anisov 2019-05-16 13:30 ` [Xen-devel] " Andrii Anisov 2019-05-16 13:30 ` Andrii Anisov 2019-05-16 13:30 ` [Xen-devel] " Andrii Anisov 2019-05-16 13:48 ` Julien Grall 2019-05-16 13:48 ` [Xen-devel] " Julien Grall 2019-05-16 14:25 ` Andrii Anisov 2019-05-16 14:25 ` [Xen-devel] " Andrii Anisov 2019-05-16 14:28 ` Julien Grall 2019-05-16 14:28 ` [Xen-devel] " Julien Grall 2019-05-16 14:29 ` Andrii Anisov 2019-05-16 14:29 ` [Xen-devel] " Andrii Anisov [not found] ` <fa126315-31af-854e-817a-8640b431c82b@arm.com> [not found] ` <CAC1WxdiMzAq5hRC-mhRQuFDs7z_Hj5w7VAy52ec87SJQOGmp3w@mail.gmail.com> [not found] ` <a28f95a1-d9da-2caf-f4b4-013100176b02@arm.com> [not found] ` <090ce8cc-f329-fe54-4894-b7f12e3cd5a6@gmail.com> 2019-05-08 13:39 ` [PATCH v2 0/2] Introduce runstate area registration with phys address Julien Grall 2019-05-08 13:39 ` [Xen-devel] " Julien Grall 2019-05-08 13:54 ` Andrii Anisov 2019-05-08 13:54 ` [Xen-devel] " Andrii Anisov 2019-05-08 14:31 ` Julien Grall 2019-05-08 14:31 ` [Xen-devel] " Julien Grall 2019-05-08 16:01 ` Andrii Anisov 2019-05-08 16:01 ` [Xen-devel] " Andrii Anisov 2019-05-13 10:50 ` Julien Grall 2019-05-13 10:50 ` [Xen-devel] " Julien Grall 2019-05-13 14:34 ` Andrii Anisov 2019-05-13 14:34 ` [Xen-devel] " Andrii Anisov 2019-05-08 13:59 ` Julien Grall 2019-05-13 10:15 ` Andrii Anisov 2019-05-13 11:16 ` Julien Grall 2019-05-13 14:14 ` Andrii Anisov 2019-05-13 14:34 ` Julien Grall 2019-05-13 15:29 ` Andrii Anisov 2019-05-13 15:31 ` Julien Grall 2019-05-13 15:38 ` Andrii Anisov 2019-05-13 15:40 ` Julien Grall 2019-05-13 15:42 ` Andrii Anisov 2019-05-13 15:45 ` Julien Grall 2019-05-13 16:05 ` Andrii Anisov
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