| | 1 | // SPDX-License-Identifier: GPL-2.0 |
| | 2 | #include <linux/types.h> |
| | 3 | #include <linux/tick.h> |
| | 4 | #include <linux/percpu-defs.h> |
| | 5 | |
| | 6 | #include <xen/xen.h> |
| | 7 | #include <xen/interface/xen.h> |
| | 8 | #include <xen/grant_table.h> |
| | 9 | #include <xen/events.h> |
| | 10 | |
| | 11 | #include <asm/cpufeatures.h> |
| | 12 | #include <asm/msr-index.h> |
| | 13 | #include <asm/xen/hypercall.h> |
| | 14 | #include <asm/xen/page.h> |
| | 15 | #include <asm/fixmap.h> |
| | 16 | #include <asm/msr.h> |
| | 17 | |
| | 18 | #include "xen-ops.h" |
| | 19 | |
| | 20 | static DEFINE_PER_CPU(u64, spec_ctrl); |
| | 21 | |
| | 22 | void xen_arch_pre_suspend(void) |
| | 23 | { |
| | 24 | xen_save_time_memory_area(); |
| | 25 | |
| | 26 | if (xen_pv_domain()) |
| | 27 | xen_pv_pre_suspend(); |
| | 28 | } |
| | 29 | |
| | 30 | void xen_arch_post_suspend(int cancelled) |
| | 31 | { |
| | 32 | if (xen_pv_domain()) |
| | 33 | xen_pv_post_suspend(cancelled); |
| | 34 | else |
| | 35 | xen_hvm_post_suspend(cancelled); |
| | 36 | |
| | 37 | xen_restore_time_memory_area(); |
| | 38 | } |
| | 39 | |
| | 40 | static void xen_vcpu_notify_restore(void *data) |
| | 41 | { |
| | 42 | if (xen_pv_domain() && boot_cpu_has(X86_FEATURE_SPEC_CTRL)) |
| | 43 | wrmsrq(MSR_IA32_SPEC_CTRL, this_cpu_read(spec_ctrl)); |
| | 44 | |
| | 45 | /* Boot processor notified via generic timekeeping_resume() */ |
| | 46 | if (smp_processor_id() == 0) |
| | 47 | return; |
| | 48 | |
| | 49 | tick_resume_local(); |
| | 50 | } |
| | 51 | |
| | 52 | static void xen_vcpu_notify_suspend(void *data) |
| | 53 | { |
| | 54 | u64 tmp; |
| | 55 | |
| | 56 | tick_suspend_local(); |
| | 57 | |
| | 58 | if (xen_pv_domain() && boot_cpu_has(X86_FEATURE_SPEC_CTRL)) { |
| | 59 | rdmsrq(MSR_IA32_SPEC_CTRL, tmp); |
| | 60 | this_cpu_write(spec_ctrl, tmp); |
| | 61 | wrmsrq(MSR_IA32_SPEC_CTRL, 0); |
| | 62 | } |
| | 63 | } |
| | 64 | |
| | 65 | void xen_arch_resume(void) |
| | 66 | { |
| | 67 | int cpu; |
| | 68 | |
| | 69 | on_each_cpu(xen_vcpu_notify_restore, NULL, 1); |
| | 70 | |
| | 71 | for_each_online_cpu(cpu) |
| | 72 | xen_pmu_init(cpu); |
| | 73 | } |
| | 74 | |
| | 75 | void xen_arch_suspend(void) |
| | 76 | { |
| | 77 | int cpu; |
| | 78 | |
| | 79 | for_each_online_cpu(cpu) |
| | 80 | xen_pmu_finish(cpu); |
| | 81 | |
| | 82 | on_each_cpu(xen_vcpu_notify_suspend, NULL, 1); |
| | 83 | } |
projects / linux-2.6-block.git / blame_incremental