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author | Liu, Jinsong <jinsong.liu@intel.com> | 2012-03-23 15:07:53 +0000 |
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committer | Liu, Jinsong <jinsong.liu@intel.com> | 2012-03-23 15:07:53 +0000 |
commit | 2772618c6eb3bc7cdf478f7dfdcb894eac0fe485 (patch) | |
tree | c6a9bd64f63021edfe516c8f38fd5ce858e5769e /xen | |
parent | 2579d22937ec662a78597f56af5f4886826a475b (diff) | |
download | xen-2772618c6eb3bc7cdf478f7dfdcb894eac0fe485.tar.gz xen-2772618c6eb3bc7cdf478f7dfdcb894eac0fe485.tar.bz2 xen-2772618c6eb3bc7cdf478f7dfdcb894eac0fe485.zip |
Xen core parking 1: hypercall
This patch implement hypercall through which dom0 send core parking
request, and get core parking result.
Due to the characteristic of continue_hypercall_on_cpu, dom0
seperately send/get core parking request/result.
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Committed-by: Keir Fraser <keir@xen.org>
Diffstat (limited to 'xen')
-rw-r--r-- | xen/arch/x86/platform_hypercall.c | 30 | ||||
-rw-r--r-- | xen/common/Makefile | 1 | ||||
-rw-r--r-- | xen/common/core_parking.c | 13 | ||||
-rw-r--r-- | xen/include/public/platform.h | 15 |
4 files changed, 59 insertions, 0 deletions
diff --git a/xen/arch/x86/platform_hypercall.c b/xen/arch/x86/platform_hypercall.c index d5f978ac31..88880b0d63 100644 --- a/xen/arch/x86/platform_hypercall.c +++ b/xen/arch/x86/platform_hypercall.c @@ -56,6 +56,10 @@ static long cpu_frequency_change_helper(void *data) long cpu_up_helper(void *data); long cpu_down_helper(void *data); +/* from core_parking.c */ +long core_parking_helper(void *data); +uint32_t get_cur_idle_nums(void); + ret_t do_platform_op(XEN_GUEST_HANDLE(xen_platform_op_t) u_xenpf_op) { ret_t ret = 0; @@ -609,6 +613,32 @@ ret_t do_platform_op(XEN_GUEST_HANDLE(xen_platform_op_t) u_xenpf_op) op->u.mem_add.epfn, op->u.mem_add.pxm); break; + + case XENPF_core_parking: + { + uint32_t idle_nums; + + switch(op->u.core_parking.type) + { + case XEN_CORE_PARKING_SET: + idle_nums = min_t(uint32_t, + op->u.core_parking.idle_nums, num_present_cpus() - 1); + ret = continue_hypercall_on_cpu( + 0, core_parking_helper, (void *)(unsigned long)idle_nums); + break; + + case XEN_CORE_PARKING_GET: + op->u.core_parking.idle_nums = get_cur_idle_nums(); + ret = copy_to_guest(u_xenpf_op, op, 1) ? -EFAULT : 0; + break; + + default: + ret = -EINVAL; + break; + } + } + break; + default: ret = -ENOSYS; break; diff --git a/xen/common/Makefile b/xen/common/Makefile index 9f2e0d612e..4c7fdd41db 100644 --- a/xen/common/Makefile +++ b/xen/common/Makefile @@ -1,4 +1,5 @@ obj-y += bitmap.o +obj-y += core_parking.o obj-y += cpu.o obj-y += cpupool.o obj-$(HAS_DEVICE_TREE) += device_tree.o diff --git a/xen/common/core_parking.c b/xen/common/core_parking.c new file mode 100644 index 0000000000..635793fba0 --- /dev/null +++ b/xen/common/core_parking.c @@ -0,0 +1,13 @@ +#include <xen/types.h> + +static uint32_t cur_idle_nums; + +long core_parking_helper(void *data) +{ + return 0; +} + +uint32_t get_cur_idle_nums(void) +{ + return cur_idle_nums; +} diff --git a/xen/include/public/platform.h b/xen/include/public/platform.h index 7b8d6e8dd5..5a723e1e10 100644 --- a/xen/include/public/platform.h +++ b/xen/include/public/platform.h @@ -490,6 +490,20 @@ struct xenpf_mem_hotadd uint32_t flags; }; +#define XENPF_core_parking 60 + +#define XEN_CORE_PARKING_SET 1 +#define XEN_CORE_PARKING_GET 2 +struct xenpf_core_parking { + /* IN variables */ + uint32_t type; + /* IN variables: set cpu nums expected to be idled */ + /* OUT variables: get cpu nums actually be idled */ + uint32_t idle_nums; +}; +typedef struct xenpf_core_parking xenpf_core_parking_t; +DEFINE_XEN_GUEST_HANDLE(xenpf_core_parking_t); + struct xen_platform_op { uint32_t cmd; uint32_t interface_version; /* XENPF_INTERFACE_VERSION */ @@ -511,6 +525,7 @@ struct xen_platform_op { struct xenpf_cpu_ol cpu_ol; struct xenpf_cpu_hotadd cpu_add; struct xenpf_mem_hotadd mem_add; + struct xenpf_core_parking core_parking; uint8_t pad[128]; } u; }; |