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6276c67f2b
Extend KVM's export macro framework to provide EXPORT_SYMBOL_FOR_KVM(), and use the helper macro to export symbols for KVM throughout x86 if and only if KVM will build one or more modules, and only for those modules. To avoid unnecessary exports when CONFIG_KVM=m but kvm.ko will not be built (because no vendor modules are selected), let arch code #define EXPORT_SYMBOL_FOR_KVM to suppress/override the exports. Note, the set of symbols to restrict to KVM was generated by manual search and audit; any "misses" are due to human error, not some grand plan. Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Kai Huang <kai.huang@intel.com> Tested-by: Kai Huang <kai.huang@intel.com> Link: https://patch.msgid.link/20251112173944.1380633-5-seanjc%40google.com
44 lines
922 B
C
44 lines
922 B
C
/*
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* Common functions shared between the various APIC flavours
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#include <linux/irq.h>
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#include <linux/kvm_types.h>
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#include <asm/apic.h>
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#include "local.h"
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u32 apic_default_calc_apicid(unsigned int cpu)
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{
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return per_cpu(x86_cpu_to_apicid, cpu);
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}
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u32 apic_flat_calc_apicid(unsigned int cpu)
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{
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return 1U << cpu;
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}
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u32 default_cpu_present_to_apicid(int mps_cpu)
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{
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if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
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return (int)per_cpu(x86_cpu_to_apicid, mps_cpu);
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else
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return BAD_APICID;
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}
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EXPORT_SYMBOL_FOR_KVM(default_cpu_present_to_apicid);
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/*
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* Set up the logical destination ID when the APIC operates in logical
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* destination mode.
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*/
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void default_init_apic_ldr(void)
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{
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unsigned long val;
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apic_write(APIC_DFR, APIC_DFR_FLAT);
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val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
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val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
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apic_write(APIC_LDR, val);
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}
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