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When running as a Xen PV dom0 the system needs to map ACPI data of the host using host physical addresses, while those addresses can conflict with the guest physical addresses of the loaded linux kernel. The same problem might apply in case a PV guest is configured to use the host memory map. This conflict can be solved by mapping the ACPI data to a different guest physical address, but mapping the data via acpi_os_ioremap() must still be possible using the host physical address, as this address might be generated by AML when referencing some of the ACPI data. When configured to support running as a Xen PV domain, have an implementation of acpi_os_ioremap() being aware of the possibility to need above mentioned translation of a host physical address to the guest physical address. This modification requires to #include linux/acpi.h in some sources which need to include asm/acpi.h directly. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
245 lines
6.2 KiB
C
245 lines
6.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _ASM_X86_ACPI_H
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#define _ASM_X86_ACPI_H
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/*
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* Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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* Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>
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*/
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#include <acpi/proc_cap_intel.h>
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#include <asm/numa.h>
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#include <asm/fixmap.h>
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#include <asm/processor.h>
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#include <asm/mmu.h>
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#include <asm/mpspec.h>
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#include <asm/x86_init.h>
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#include <asm/cpufeature.h>
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#include <asm/irq_vectors.h>
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#include <asm/xen/hypervisor.h>
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#include <xen/xen.h>
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#ifdef CONFIG_ACPI_APEI
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# include <asm/pgtable_types.h>
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#endif
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#ifdef CONFIG_ACPI
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extern int acpi_lapic;
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extern int acpi_ioapic;
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extern int acpi_noirq;
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extern int acpi_strict;
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extern int acpi_disabled;
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extern int acpi_pci_disabled;
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extern int acpi_skip_timer_override;
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extern int acpi_use_timer_override;
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extern int acpi_fix_pin2_polarity;
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extern int acpi_disable_cmcff;
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extern bool acpi_int_src_ovr[NR_IRQS_LEGACY];
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extern u8 acpi_sci_flags;
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extern u32 acpi_sci_override_gsi;
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void acpi_pic_sci_set_trigger(unsigned int, u16);
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struct device;
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extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
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int trigger, int polarity);
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extern void (*__acpi_unregister_gsi)(u32 gsi);
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static inline void disable_acpi(void)
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{
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acpi_disabled = 1;
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acpi_pci_disabled = 1;
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acpi_noirq = 1;
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}
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extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
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extern int acpi_blacklisted(void);
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static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
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static inline void acpi_disable_pci(void)
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{
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acpi_pci_disabled = 1;
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acpi_noirq_set();
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}
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/* Low-level suspend routine. */
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extern int (*acpi_suspend_lowlevel)(void);
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/* Physical address to resume after wakeup */
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unsigned long acpi_get_wakeup_address(void);
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static inline bool acpi_skip_set_wakeup_address(void)
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{
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return cpu_feature_enabled(X86_FEATURE_XENPV);
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}
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#define acpi_skip_set_wakeup_address acpi_skip_set_wakeup_address
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union acpi_subtable_headers;
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int __init acpi_parse_mp_wake(union acpi_subtable_headers *header,
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const unsigned long end);
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void asm_acpi_mp_play_dead(u64 reset_vector, u64 pgd_pa);
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/*
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* Check if the CPU can handle C2 and deeper
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*/
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static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
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{
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/*
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* Early models (<=5) of AMD Opterons are not supposed to go into
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* C2 state.
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*
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* Steppings 0x0A and later are good
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*/
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if (boot_cpu_data.x86 == 0x0F &&
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boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
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boot_cpu_data.x86_model <= 0x05 &&
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boot_cpu_data.x86_stepping < 0x0A)
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return 1;
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else if (boot_cpu_has(X86_BUG_AMD_APIC_C1E))
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return 1;
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else
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return max_cstate;
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}
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static inline bool arch_has_acpi_pdc(void)
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{
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struct cpuinfo_x86 *c = &cpu_data(0);
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return (c->x86_vendor == X86_VENDOR_INTEL ||
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c->x86_vendor == X86_VENDOR_CENTAUR);
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}
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static inline void arch_acpi_set_proc_cap_bits(u32 *cap)
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{
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struct cpuinfo_x86 *c = &cpu_data(0);
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*cap |= ACPI_PROC_CAP_C_CAPABILITY_SMP;
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/* Enable coordination with firmware's _TSD info */
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*cap |= ACPI_PROC_CAP_SMP_T_SWCOORD;
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if (cpu_has(c, X86_FEATURE_EST))
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*cap |= ACPI_PROC_CAP_EST_CAPABILITY_SWSMP;
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if (cpu_has(c, X86_FEATURE_ACPI))
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*cap |= ACPI_PROC_CAP_T_FFH;
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if (cpu_has(c, X86_FEATURE_HWP))
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*cap |= ACPI_PROC_CAP_COLLAB_PROC_PERF;
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/*
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* If mwait/monitor is unsupported, C_C1_FFH and
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* C2/C3_FFH will be disabled.
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*/
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if (!cpu_has(c, X86_FEATURE_MWAIT) ||
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boot_option_idle_override == IDLE_NOMWAIT)
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*cap &= ~(ACPI_PROC_CAP_C_C1_FFH | ACPI_PROC_CAP_C_C2C3_FFH);
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if (xen_initial_domain()) {
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/*
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* When Linux is running as Xen dom0, the hypervisor is the
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* entity in charge of the processor power management, and so
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* Xen needs to check the OS capabilities reported in the
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* processor capabilities buffer matches what the hypervisor
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* driver supports.
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*/
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xen_sanitize_proc_cap_bits(cap);
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}
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}
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static inline bool acpi_has_cpu_in_madt(void)
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{
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return !!acpi_lapic;
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}
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#define ACPI_HAVE_ARCH_SET_ROOT_POINTER
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static inline void acpi_arch_set_root_pointer(u64 addr)
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{
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x86_init.acpi.set_root_pointer(addr);
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}
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#define ACPI_HAVE_ARCH_GET_ROOT_POINTER
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static inline u64 acpi_arch_get_root_pointer(void)
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{
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return x86_init.acpi.get_root_pointer();
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}
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void acpi_generic_reduced_hw_init(void);
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void x86_default_set_root_pointer(u64 addr);
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u64 x86_default_get_root_pointer(void);
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#ifdef CONFIG_XEN_PV
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/* A Xen PV domain needs a special acpi_os_ioremap() handling. */
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extern void __iomem * (*acpi_os_ioremap)(acpi_physical_address phys,
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acpi_size size);
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void __iomem *x86_acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
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#define acpi_os_ioremap acpi_os_ioremap
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#endif
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#else /* !CONFIG_ACPI */
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#define acpi_lapic 0
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#define acpi_ioapic 0
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#define acpi_disable_cmcff 0
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static inline void acpi_noirq_set(void) { }
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static inline void acpi_disable_pci(void) { }
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static inline void disable_acpi(void) { }
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static inline void acpi_generic_reduced_hw_init(void) { }
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static inline void x86_default_set_root_pointer(u64 addr) { }
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static inline u64 x86_default_get_root_pointer(void)
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{
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return 0;
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}
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#endif /* !CONFIG_ACPI */
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#define ARCH_HAS_POWER_INIT 1
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#ifdef CONFIG_ACPI_NUMA
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extern int x86_acpi_numa_init(void);
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#endif /* CONFIG_ACPI_NUMA */
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struct cper_ia_proc_ctx;
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#ifdef CONFIG_ACPI_APEI
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static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
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{
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/*
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* We currently have no way to look up the EFI memory map
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* attributes for a region in a consistent way, because the
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* memmap is discarded after efi_free_boot_services(). So if
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* you call efi_mem_attributes() during boot and at runtime,
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* you could theoretically see different attributes.
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*
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* We are yet to see any x86 platforms that require anything
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* other than PAGE_KERNEL (some ARM64 platforms require the
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* equivalent of PAGE_KERNEL_NOCACHE). Additionally, if SME
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* is active, the ACPI information will not be encrypted,
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* so return PAGE_KERNEL_NOENC until we know differently.
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*/
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return PAGE_KERNEL_NOENC;
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}
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int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
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u64 lapic_id);
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#else
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static inline int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
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u64 lapic_id)
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{
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return -EINVAL;
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}
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#endif
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#define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT)
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#endif /* _ASM_X86_ACPI_H */
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