1 files changed, 26 insertions, 0 deletions

diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index 60d2b2db0bc5..56f462cf22d2 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -142,6 +142,32 @@ static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
                 return max_cstate;
 }
 
+static inline bool arch_has_acpi_pdc(void)
+{
+        struct cpuinfo_x86 *c = &cpu_data(0);
+        return (c->x86_vendor == X86_VENDOR_INTEL ||
+                c->x86_vendor == X86_VENDOR_CENTAUR);
+}
+
+static inline void arch_acpi_set_pdc_bits(u32 *buf)
+{
+        struct cpuinfo_x86 *c = &cpu_data(0);
+
+        buf[2] |= ACPI_PDC_C_CAPABILITY_SMP;
+
+        if (cpu_has(c, X86_FEATURE_EST))
+                buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
+
+        if (cpu_has(c, X86_FEATURE_ACPI))
+                buf[2] |= ACPI_PDC_T_FFH;
+
+        /*
+         * If mwait/monitor is unsupported, C2/C3_FFH will be disabled
+         */
+        if (!cpu_has(c, X86_FEATURE_MWAIT))
+                buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
+}
+
 #else /* !CONFIG_ACPI */
 
 #define acpi_lapic 0