ac6e56e6d7
23900-xzalloc.patch 24144-cpufreq-turbo-crash.patch 24148-shadow-pgt-dying-op-performance.patch 24155-x86-ioapic-EOI-after-migration.patch 24156-x86-ioapic-shared-vectors.patch 24157-x86-xstate-init.patch 24168-x86-vioapic-clear-remote_irr.patch - submit fixes for bnc#649209 and bnc#711892 xl-create-pv-with-qcow2-img.patch update suspend_evtchn_lock.patch - Update trace.c, merge patches from upstream 23050-xentrace_dynamic_tracebuffer_allocation.patch 23091-xentrace_fix_t_info_pages_calculation..patch 23092-xentrace_print_calculated_numbers_in_calculate_tbuf_size.patch 23093-xentrace_remove_gdprintk_usage_since_they_are_not_in_guest_context.patch 23094-xentrace_update_comments.patch 23095-xentrace_use_consistent_printk_prefix.patch 23128-xentrace_correct_formula_to_calculate_t_info_pages.patch 23129-xentrace_remove_unneeded_debug_printk.patch 23173-xentrace_Move_register_cpu_notifier_call_into_boot-time_init..patch 23239-xentrace_correct_overflow_check_for_number_of_per-cpu_trace_pages.patch 23308-xentrace_Move_the_global_variable_t_info_first_offset_into_calculate_tbuf_size.patch 23309-xentrace_Mark_data_size___read_mostly_because_its_only_written_once.patch 23310-xentrace_Remove_unneeded_cast_when_assigning_pointer_value_to_dst.patch 23404-xentrace_reduce_trace_buffer_size_to_something_mfn_offset_can_reach.patch OBS-URL: https://build.opensuse.org/package/show/Virtualization/xen?expand=0&rev=160
65 lines
2.4 KiB
Diff
65 lines
2.4 KiB
Diff
# HG changeset patch
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# User Jan Beulich <jbeulich@suse.com>
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# Date 1321017916 -3600
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# Node ID 8b08b2166aa82e7df0b1fa620ed57078810f8c12
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# Parent 4699decb8424a00447c466205be3cb4d0fb95a76
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x86: quiesce cpuidle code
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So far these messages got pointlessly (as the code in other places
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assumes symmetric configuration) emitted once per CPU. Hide the debug
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one behind opt_cpu_info, and issue the info one just once (if the code
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gets adjusted to support assymtric configurations, this would need to
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be revisited, but ideally without producing per-CPU messages again).
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Signed-off-by: Jan Beulich <jbeulich@suse.com>
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Acked-by: Keir Fraser <keir@xen.org>
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--- a/xen/arch/x86/acpi/cpu_idle.c
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+++ b/xen/arch/x86/acpi/cpu_idle.c
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@@ -659,6 +659,8 @@ static int acpi_processor_ffh_cstate_pro
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unsigned int edx_part;
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unsigned int cstate_type; /* C-state type and not ACPI C-state type */
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unsigned int num_cstate_subtype;
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+ int ret = 0;
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+ static unsigned long printed;
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if ( c->cpuid_level < CPUID_MWAIT_LEAF )
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{
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@@ -667,8 +669,9 @@ static int acpi_processor_ffh_cstate_pro
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}
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cpuid(CPUID_MWAIT_LEAF, &eax, &ebx, &ecx, &edx);
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- printk(XENLOG_DEBUG "cpuid.MWAIT[.eax=%x, .ebx=%x, .ecx=%x, .edx=%x]\n",
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- eax, ebx, ecx, edx);
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+ if ( opt_cpu_info )
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+ printk(XENLOG_DEBUG "cpuid.MWAIT[eax=%x ebx=%x ecx=%x edx=%x]\n",
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+ eax, ebx, ecx, edx);
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/* Check whether this particular cx_type (in CST) is supported or not */
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cstate_type = (cx->reg.address >> MWAIT_SUBSTATE_SIZE) + 1;
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@@ -676,15 +679,16 @@ static int acpi_processor_ffh_cstate_pro
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num_cstate_subtype = edx_part & MWAIT_SUBSTATE_MASK;
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if ( num_cstate_subtype < (cx->reg.address & MWAIT_SUBSTATE_MASK) )
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- return -EFAULT;
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-
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+ ret = -ERANGE;
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/* mwait ecx extensions INTERRUPT_BREAK should be supported for C2/C3 */
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- if ( !(ecx & CPUID5_ECX_EXTENSIONS_SUPPORTED) ||
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- !(ecx & CPUID5_ECX_INTERRUPT_BREAK) )
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- return -EFAULT;
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-
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- printk(XENLOG_INFO "Monitor-Mwait will be used to enter C-%d state\n", cx->type);
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- return 0;
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+ else if ( !(ecx & CPUID5_ECX_EXTENSIONS_SUPPORTED) ||
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+ !(ecx & CPUID5_ECX_INTERRUPT_BREAK) )
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+ ret = -ENODEV;
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+ else if ( opt_cpu_info || cx->type >= BITS_PER_LONG ||
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+ !test_and_set_bit(cx->type, &printed) )
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+ printk(XENLOG_INFO "Monitor-Mwait will be used to enter C%d state\n",
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+ cx->type);
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+ return ret;
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}
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/*
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