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openSUSE:Evergreen:Maintenance:114
xen.openSUSE_Evergreen_11.4
23783-ACPI-set-_PDC-bits.patch
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File 23783-ACPI-set-_PDC-bits.patch of Package xen.openSUSE_Evergreen_11.4
# HG changeset patch # User Jan Beulich <jbeulich@novell.com> # Date 1314004356 -3600 # Node ID 2029263c501c315fa4d94845e5cfa6a9b0b395d5 # Parent 25dfe53bb1898b3967ceb71a7eb60a8b760c25fb ACPI: add _PDC input override mechanism In order to have Dom0 call _PDC with input fully representing Xen's capabilities, and in order to avoid building knowledge of Xen implementation details into Dom0, this provides a mechanism by which the Dom0 kernel can, once it filled the _PDC input buffer according to its own knowledge, present the buffer to Xen to apply overrides for the parts of the C-, P-, and T-state management that it controls. This is particularly to address the dependency of Xen using MWAIT to enter certain C-states on the availability of the break-on-interrupt extension (which the Dom0 kernel should have no need to know about). Signed-off-by: Jan Beulich <jbeulich@novell.com> --- a/xen/arch/ia64/linux-xen/acpi.c +++ b/xen/arch/ia64/linux-xen/acpi.c @@ -243,6 +243,13 @@ int get_cpu_id(u32 acpi_id) return -1; } + +int arch_acpi_set_pdc_bits(u32 acpi_id, u32 *pdc, u32 mask) +{ + pdc[2] |= ACPI_PDC_EST_CAPABILITY_SMP & mask; + return 0; +} + #endif static int __init --- a/xen/arch/x86/acpi/cpu_idle.c +++ b/xen/arch/x86/acpi/cpu_idle.c @@ -490,12 +490,6 @@ static int init_cx_pminfo(struct acpi_pr return 0; } -#define CPUID_MWAIT_LEAF (5) -#define CPUID5_ECX_EXTENSIONS_SUPPORTED (0x1) -#define CPUID5_ECX_INTERRUPT_BREAK (0x2) - -#define MWAIT_ECX_INTERRUPT_BREAK (0x1) - #define MWAIT_SUBSTATE_MASK (0xf) #define MWAIT_SUBSTATE_SIZE (4) --- a/xen/arch/x86/acpi/boot.c +++ b/xen/arch/x86/acpi/boot.c @@ -1008,3 +1008,47 @@ unsigned int acpi_get_processor_id(unsig return INVALID_ACPIID; } + +static void get_mwait_ecx(void *info) +{ + *(u32 *)info = cpuid_ecx(CPUID_MWAIT_LEAF); +} + +int arch_acpi_set_pdc_bits(u32 acpi_id, u32 *pdc, u32 mask) +{ + unsigned int cpu = get_cpu_id(acpi_id); + struct cpuinfo_x86 *c; + u32 ecx; + + if (!(acpi_id + 1)) + c = &boot_cpu_data; + else if (cpu >= NR_CPUS || !cpu_online(cpu)) + return -EINVAL; + else + c = cpu_data + cpu; + + pdc[2] |= ACPI_PDC_C_CAPABILITY_SMP & mask; + + if (cpu_has(c, X86_FEATURE_EST)) + pdc[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP & mask; + + if (cpu_has(c, X86_FEATURE_ACPI)) + pdc[2] |= ACPI_PDC_T_FFH & mask; + + /* + * If mwait/monitor or its break-on-interrupt extension are + * unsupported, Cx_FFH will be disabled. + */ + if (!cpu_has(c, X86_FEATURE_MWAIT) || + c->cpuid_level < CPUID_MWAIT_LEAF) + ecx = 0; + else if (c == &boot_cpu_data || cpu == smp_processor_id()) + ecx = cpuid_ecx(CPUID_MWAIT_LEAF); + else + on_selected_cpus(cpumask_of(cpu), get_mwait_ecx, &ecx, 1); + if (!(ecx & CPUID5_ECX_EXTENSIONS_SUPPORTED) || + !(ecx & CPUID5_ECX_INTERRUPT_BREAK)) + pdc[2] &= ~(ACPI_PDC_C_C1_FFH | ACPI_PDC_C_C2C3_FFH); + + return 0; +} --- a/xen/arch/x86/platform_hypercall.c +++ b/xen/arch/x86/platform_hypercall.c @@ -396,6 +396,15 @@ ret_t do_platform_op(XEN_GUEST_HANDLE(xe ret = -EINVAL; break; + case XEN_PM_PDC: + { + XEN_GUEST_HANDLE(uint32) pdc; + + guest_from_compat_handle(pdc, op->u.set_pminfo.u.pdc); + ret = acpi_set_pdc_bits(op->u.set_pminfo.id, pdc); + } + break; + default: ret = -EINVAL; break; --- a/xen/drivers/acpi/pmstat.c +++ b/xen/drivers/acpi/pmstat.c @@ -572,3 +572,34 @@ int do_pm_op(struct xen_sysctl_pm_op *op return ret; } + +int acpi_set_pdc_bits(u32 acpi_id, XEN_GUEST_HANDLE(uint32) pdc) +{ + u32 bits[3]; + int ret; + + if ( copy_from_guest(bits, pdc, 2) ) + ret = -EFAULT; + else if ( bits[0] != ACPI_PDC_REVISION_ID || !bits[1] ) + ret = -EINVAL; + else if ( copy_from_guest_offset(bits + 2, pdc, 2, 1) ) + ret = -EFAULT; + else + { + u32 mask = 0; + + if ( xen_processor_pmbits & XEN_PROCESSOR_PM_CX ) + mask |= ACPI_PDC_C_MASK | ACPI_PDC_SMP_C1PT; + if ( xen_processor_pmbits & XEN_PROCESSOR_PM_PX ) + mask |= ACPI_PDC_P_MASK | ACPI_PDC_SMP_C1PT; + if ( xen_processor_pmbits & XEN_PROCESSOR_PM_TX ) + mask |= ACPI_PDC_T_MASK | ACPI_PDC_SMP_C1PT; + bits[2] &= (ACPI_PDC_C_MASK | ACPI_PDC_P_MASK | ACPI_PDC_T_MASK | + ACPI_PDC_SMP_C1PT) & ~mask; + ret = arch_acpi_set_pdc_bits(acpi_id, bits, mask); + } + if ( !ret ) + ret = copy_to_guest_offset(pdc, 2, bits + 2, 1); + + return ret; +} --- a/xen/include/acpi/cpufreq/processor_perf.h +++ b/xen/include/acpi/cpufreq/processor_perf.h @@ -3,10 +3,10 @@ #include <public/platform.h> #include <public/sysctl.h> +#include <xen/acpi.h> #define XEN_PX_INIT 0x80000000 -int get_cpu_id(u32); int powernow_cpufreq_init(void); unsigned int powernow_register_driver(void); --- a/xen/include/acpi/pdc_intel.h +++ b/xen/include/acpi/pdc_intel.h @@ -4,6 +4,8 @@ #ifndef __PDC_INTEL_H__ #define __PDC_INTEL_H__ +#define ACPI_PDC_REVISION_ID 1 + #define ACPI_PDC_P_FFH (0x0001) #define ACPI_PDC_C_C1_HALT (0x0002) #define ACPI_PDC_T_FFH (0x0004) @@ -14,6 +16,7 @@ #define ACPI_PDC_SMP_T_SWCOORD (0x0080) #define ACPI_PDC_C_C1_FFH (0x0100) #define ACPI_PDC_C_C2C3_FFH (0x0200) +#define ACPI_PDC_SMP_P_HWCOORD (0x0800) #define ACPI_PDC_EST_CAPABILITY_SMP (ACPI_PDC_SMP_C1PT | \ ACPI_PDC_C_C1_HALT | \ @@ -22,6 +25,7 @@ #define ACPI_PDC_EST_CAPABILITY_SWSMP (ACPI_PDC_SMP_C1PT | \ ACPI_PDC_C_C1_HALT | \ ACPI_PDC_SMP_P_SWCOORD | \ + ACPI_PDC_SMP_P_HWCOORD | \ ACPI_PDC_P_FFH) #define ACPI_PDC_C_CAPABILITY_SMP (ACPI_PDC_SMP_C2C3 | \ @@ -30,4 +34,17 @@ ACPI_PDC_C_C1_FFH | \ ACPI_PDC_C_C2C3_FFH) +#define ACPI_PDC_C_MASK (ACPI_PDC_C_C1_HALT | \ + ACPI_PDC_C_C1_FFH | \ + ACPI_PDC_SMP_C2C3 | \ + ACPI_PDC_SMP_C_SWCOORD | \ + ACPI_PDC_C_C2C3_FFH) + +#define ACPI_PDC_P_MASK (ACPI_PDC_P_FFH | \ + ACPI_PDC_SMP_P_SWCOORD | \ + ACPI_PDC_SMP_P_HWCOORD) + +#define ACPI_PDC_T_MASK (ACPI_PDC_T_FFH | \ + ACPI_PDC_SMP_T_SWCOORD) + #endif /* __PDC_INTEL_H__ */ --- a/xen/include/asm-x86/cpufeature.h +++ b/xen/include/asm-x86/cpufeature.h @@ -138,6 +138,10 @@ #define cpu_has(c, bit) test_bit(bit, (c)->x86_capability) #define boot_cpu_has(bit) test_bit(bit, boot_cpu_data.x86_capability) +#define CPUID_MWAIT_LEAF 5 +#define CPUID5_ECX_EXTENSIONS_SUPPORTED 0x1 +#define CPUID5_ECX_INTERRUPT_BREAK 0x2 + #ifdef __i386__ #define cpu_has_vme boot_cpu_has(X86_FEATURE_VME) #define cpu_has_de boot_cpu_has(X86_FEATURE_DE) --- a/xen/include/public/platform.h +++ b/xen/include/public/platform.h @@ -210,6 +210,7 @@ DEFINE_XEN_GUEST_HANDLE(xenpf_getidletim #define XEN_PM_CX 0 #define XEN_PM_PX 1 #define XEN_PM_TX 2 +#define XEN_PM_PDC 3 /* Px sub info type */ #define XEN_PX_PCT 1 @@ -307,6 +308,7 @@ struct xenpf_set_processor_pminfo { union { struct xen_processor_power power;/* Cx: _CST/_CSD */ struct xen_processor_performance perf; /* Px: _PPC/_PCT/_PSS/_PSD */ + XEN_GUEST_HANDLE(uint32) pdc; /* _PDC */ } u; }; typedef struct xenpf_set_processor_pminfo xenpf_set_processor_pminfo_t; --- a/xen/include/xen/acpi.h +++ b/xen/include/xen/acpi.h @@ -333,6 +333,8 @@ static inline int acpi_boot_table_init(v #endif /*!CONFIG_ACPI_BOOT*/ +int get_cpu_id(u32 acpi_id); + unsigned int acpi_register_gsi (u32 gsi, int edge_level, int active_high_low); int acpi_gsi_to_irq (u32 gsi, unsigned int *irq); @@ -430,6 +432,9 @@ static inline unsigned int acpi_get_csta static inline void acpi_set_cstate_limit(unsigned int new_limit) { return; } #endif +int acpi_set_pdc_bits(u32 acpi_id, XEN_GUEST_HANDLE(uint32)); +int arch_acpi_set_pdc_bits(u32 acpi_id, u32 *, u32 mask); + #ifdef CONFIG_ACPI_NUMA int acpi_get_pxm(acpi_handle handle); #else
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