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Commit f682a792 authored by Linus Torvalds's avatar Linus Torvalds
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Merge branch 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull x86 paravirt updates from Ingo Molnar:
 "Two main changes:

   - Remove no longer used parts of the paravirt infrastructure and put
     large quantities of paravirt ops under a new config option
     PARAVIRT_XXL=y, which is selected by XEN_PV only. (Joergen Gross)

   - Enable PV spinlocks on Hyperv (Yi Sun)"

* 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/hyperv: Enable PV qspinlock for Hyper-V
  x86/hyperv: Add GUEST_IDLE_MSR support
  x86/paravirt: Clean up native_patch()
  x86/paravirt: Prevent redefinition of SAVE_FLAGS macro
  x86/xen: Make xen_reservation_lock static
  x86/paravirt: Remove unneeded mmu related paravirt ops bits
  x86/paravirt: Move the Xen-only pv_mmu_ops under the PARAVIRT_XXL umbrella
  x86/paravirt: Move the pv_irq_ops under the PARAVIRT_XXL umbrella
  x86/paravirt: Move the Xen-only pv_cpu_ops under the PARAVIRT_XXL umbrella
  x86/paravirt: Move items in pv_info under PARAVIRT_XXL umbrella
  x86/paravirt: Introduce new config option PARAVIRT_XXL
  x86/paravirt: Remove unused paravirt bits
  x86/paravirt: Use a single ops structure
  x86/paravirt: Remove clobbers from struct paravirt_patch_site
  x86/paravirt: Remove clobbers parameter from paravirt patch functions
  x86/paravirt: Make paravirt_patch_call() and paravirt_patch_jmp() static
  x86/xen: Add SPDX identifier in arch/x86/xen files
  x86/xen: Link platform-pci-unplug.o only if CONFIG_XEN_PVHVM
  x86/xen: Move pv specific parts of arch/x86/xen/mmu.c to mmu_pv.c
  x86/xen: Move pv irq related functions under CONFIG_XEN_PV umbrella
parents 99792e0c 3a025de6
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Showing with 1023 additions and 1006 deletions
Documentation/admin-guide/kernel-parameters.txt
View file @ f682a792
......@@ -1390,6 +1390,11 @@
hvc_iucv_allow= [S390] Comma-separated list of z/VM user IDs.
If specified, z/VM IUCV HVC accepts connections
from listed z/VM user IDs only.
hv_nopvspin [X86,HYPER_V] Disables the paravirt spinlock optimizations
which allow the hypervisor to 'idle' the
guest on lock contention.
keep_bootcon [KNL]
Do not unregister boot console at start. This is only
useful for debugging when something happens in the window
......
arch/arm/include/asm/paravirt.h
View file @ f682a792
......@@ -10,11 +10,16 @@ extern struct static_key paravirt_steal_rq_enabled;
struct pv_time_ops {
unsigned long long (*steal_clock)(int cpu);
};
extern struct pv_time_ops pv_time_ops;
struct paravirt_patch_template {
struct pv_time_ops time;
};
extern struct paravirt_patch_template pv_ops;
static inline u64 paravirt_steal_clock(int cpu)
{
return pv_time_ops.steal_clock(cpu);
return pv_ops.time.steal_clock(cpu);
}
#endif
......
arch/arm/kernel/paravirt.c
View file @ f682a792
......@@ -21,5 +21,5 @@
struct static_key paravirt_steal_enabled;
struct static_key paravirt_steal_rq_enabled;
struct pv_time_ops pv_time_ops;
EXPORT_SYMBOL_GPL(pv_time_ops);
struct paravirt_patch_template pv_ops;
EXPORT_SYMBOL_GPL(pv_ops);
arch/arm/xen/enlighten.c
View file @ f682a792
......@@ -62,29 +62,6 @@ static __read_mostly unsigned int xen_events_irq;
uint32_t xen_start_flags;
EXPORT_SYMBOL(xen_start_flags);
int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *gfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned domid,
struct page **pages)
{
return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
prot, domid, pages);
}
EXPORT_SYMBOL_GPL(xen_remap_domain_gfn_array);
/* Not used by XENFEAT_auto_translated guests. */
int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t gfn, int nr,
pgprot_t prot, unsigned domid,
struct page **pages)
{
return -ENOSYS;
}
EXPORT_SYMBOL_GPL(xen_remap_domain_gfn_range);
int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
int nr, struct page **pages)
{
......@@ -92,17 +69,6 @@ int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
}
EXPORT_SYMBOL_GPL(xen_unmap_domain_gfn_range);
/* Not used by XENFEAT_auto_translated guests. */
int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *mfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned int domid, struct page **pages)
{
return -ENOSYS;
}
EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_array);
static void xen_read_wallclock(struct timespec64 *ts)
{
u32 version;
......
arch/arm64/include/asm/paravirt.h
View file @ f682a792
......@@ -10,11 +10,16 @@ extern struct static_key paravirt_steal_rq_enabled;
struct pv_time_ops {
unsigned long long (*steal_clock)(int cpu);
};
extern struct pv_time_ops pv_time_ops;
struct paravirt_patch_template {
struct pv_time_ops time;
};
extern struct paravirt_patch_template pv_ops;
static inline u64 paravirt_steal_clock(int cpu)
{
return pv_time_ops.steal_clock(cpu);
return pv_ops.time.steal_clock(cpu);
}
#endif
......
arch/arm64/kernel/paravirt.c
View file @ f682a792
......@@ -21,5 +21,5 @@
struct static_key paravirt_steal_enabled;
struct static_key paravirt_steal_rq_enabled;
struct pv_time_ops pv_time_ops;
EXPORT_SYMBOL_GPL(pv_time_ops);
struct paravirt_patch_template pv_ops;
EXPORT_SYMBOL_GPL(pv_ops);
arch/x86/Kconfig
View file @ f682a792
......@@ -523,6 +523,7 @@ config X86_VSMP
bool "ScaleMP vSMP"
select HYPERVISOR_GUEST
select PARAVIRT
select PARAVIRT_XXL
depends on X86_64 && PCI
depends on X86_EXTENDED_PLATFORM
depends on SMP
......@@ -753,6 +754,9 @@ config PARAVIRT
over full virtualization. However, when run without a hypervisor
the kernel is theoretically slower and slightly larger.
config PARAVIRT_XXL
bool
config PARAVIRT_DEBUG
bool "paravirt-ops debugging"
depends on PARAVIRT && DEBUG_KERNEL
......
arch/x86/boot/compressed/misc.h
View file @ f682a792
......@@ -9,6 +9,7 @@
* paravirt and debugging variants are added.)
*/
#undef CONFIG_PARAVIRT
#undef CONFIG_PARAVIRT_XXL
#undef CONFIG_PARAVIRT_SPINLOCKS
#undef CONFIG_KASAN
......
arch/x86/entry/entry_32.S
View file @ f682a792
......@@ -783,7 +783,7 @@ GLOBAL(__begin_SYSENTER_singlestep_region)
* will ignore all of the single-step traps generated in this range.
*/
#ifdef CONFIG_XEN
#ifdef CONFIG_XEN_PV
/*
* Xen doesn't set %esp to be precisely what the normal SYSENTER
* entry point expects, so fix it up before using the normal path.
......@@ -1241,7 +1241,7 @@ ENTRY(spurious_interrupt_bug)
jmp common_exception
END(spurious_interrupt_bug)
#ifdef CONFIG_XEN
#ifdef CONFIG_XEN_PV
ENTRY(xen_hypervisor_callback)
pushl $-1 /* orig_ax = -1 => not a system call */
SAVE_ALL
......@@ -1322,11 +1322,13 @@ ENTRY(xen_failsafe_callback)
_ASM_EXTABLE(3b, 8b)
_ASM_EXTABLE(4b, 9b)
ENDPROC(xen_failsafe_callback)
#endif /* CONFIG_XEN_PV */
#ifdef CONFIG_XEN_PVHVM
BUILD_INTERRUPT3(xen_hvm_callback_vector, HYPERVISOR_CALLBACK_VECTOR,
xen_evtchn_do_upcall)
#endif
#endif /* CONFIG_XEN */
#if IS_ENABLED(CONFIG_HYPERV)
......
arch/x86/entry/entry_64.S
View file @ f682a792
......@@ -1050,7 +1050,7 @@ ENTRY(do_softirq_own_stack)
ret
ENDPROC(do_softirq_own_stack)
#ifdef CONFIG_XEN
#ifdef CONFIG_XEN_PV
idtentry hypervisor_callback xen_do_hypervisor_callback has_error_code=0
/*
......@@ -1130,11 +1130,13 @@ ENTRY(xen_failsafe_callback)
ENCODE_FRAME_POINTER
jmp error_exit
END(xen_failsafe_callback)
#endif /* CONFIG_XEN_PV */
#ifdef CONFIG_XEN_PVHVM
apicinterrupt3 HYPERVISOR_CALLBACK_VECTOR \
xen_hvm_callback_vector xen_evtchn_do_upcall
#endif
#endif /* CONFIG_XEN */
#if IS_ENABLED(CONFIG_HYPERV)
apicinterrupt3 HYPERVISOR_CALLBACK_VECTOR \
......@@ -1151,7 +1153,7 @@ idtentry debug do_debug has_error_code=0 paranoid=1 shift_ist=DEBUG_STACK
idtentry int3 do_int3 has_error_code=0
idtentry stack_segment do_stack_segment has_error_code=1
#ifdef CONFIG_XEN
#ifdef CONFIG_XEN_PV
idtentry xennmi do_nmi has_error_code=0
idtentry xendebug do_debug has_error_code=0
idtentry xenint3 do_int3 has_error_code=0
......
arch/x86/hyperv/Makefile
View file @ f682a792
obj-y := hv_init.o mmu.o nested.o
obj-$(CONFIG_X86_64) += hv_apic.o
ifdef CONFIG_X86_64
obj-$(CONFIG_PARAVIRT_SPINLOCKS) += hv_spinlock.o
endif
arch/x86/hyperv/hv_spinlock.c 0 → 100644
View file @ f682a792
// SPDX-License-Identifier: GPL-2.0
/*
* Hyper-V specific spinlock code.
*
* Copyright (C) 2018, Intel, Inc.
*
* Author : Yi Sun <yi.y.sun@intel.com>
*/
#define pr_fmt(fmt) "Hyper-V: " fmt
#include <linux/spinlock.h>
#include <asm/mshyperv.h>
#include <asm/paravirt.h>
#include <asm/apic.h>
static bool __initdata hv_pvspin = true;
static void hv_qlock_kick(int cpu)
{
apic->send_IPI(cpu, X86_PLATFORM_IPI_VECTOR);
}
static void hv_qlock_wait(u8 *byte, u8 val)
{
unsigned long msr_val;
unsigned long flags;
if (in_nmi())
return;
/*
* Reading HV_X64_MSR_GUEST_IDLE MSR tells the hypervisor that the
* vCPU can be put into 'idle' state. This 'idle' state is
* terminated by an IPI, usually from hv_qlock_kick(), even if
* interrupts are disabled on the vCPU.
*
* To prevent a race against the unlock path it is required to
* disable interrupts before accessing the HV_X64_MSR_GUEST_IDLE
* MSR. Otherwise, if the IPI from hv_qlock_kick() arrives between
* the lock value check and the rdmsrl() then the vCPU might be put
* into 'idle' state by the hypervisor and kept in that state for
* an unspecified amount of time.
*/
local_irq_save(flags);
/*
* Only issue the rdmsrl() when the lock state has not changed.
*/
if (READ_ONCE(*byte) == val)
rdmsrl(HV_X64_MSR_GUEST_IDLE, msr_val);
local_irq_restore(flags);
}
/*
* Hyper-V does not support this so far.
*/
bool hv_vcpu_is_preempted(int vcpu)
{
return false;
}
PV_CALLEE_SAVE_REGS_THUNK(hv_vcpu_is_preempted);
void __init hv_init_spinlocks(void)
{
if (!hv_pvspin || !apic ||
!(ms_hyperv.hints & HV_X64_CLUSTER_IPI_RECOMMENDED) ||
!(ms_hyperv.features & HV_X64_MSR_GUEST_IDLE_AVAILABLE)) {
pr_info("PV spinlocks disabled\n");
return;
}
pr_info("PV spinlocks enabled\n");
__pv_init_lock_hash();
pv_ops.lock.queued_spin_lock_slowpath = __pv_queued_spin_lock_slowpath;
pv_ops.lock.queued_spin_unlock = PV_CALLEE_SAVE(__pv_queued_spin_unlock);
pv_ops.lock.wait = hv_qlock_wait;
pv_ops.lock.kick = hv_qlock_kick;
pv_ops.lock.vcpu_is_preempted = PV_CALLEE_SAVE(hv_vcpu_is_preempted);
}
static __init int hv_parse_nopvspin(char *arg)
{
hv_pvspin = false;
return 0;
}
early_param("hv_nopvspin", hv_parse_nopvspin);
arch/x86/hyperv/mmu.c
View file @ f682a792
......@@ -231,6 +231,6 @@ void hyperv_setup_mmu_ops(void)
return;
pr_info("Using hypercall for remote TLB flush\n");
pv_mmu_ops.flush_tlb_others = hyperv_flush_tlb_others;
pv_mmu_ops.tlb_remove_table = tlb_remove_table;
pv_ops.mmu.flush_tlb_others = hyperv_flush_tlb_others;
pv_ops.mmu.tlb_remove_table = tlb_remove_table;
}
arch/x86/include/asm/debugreg.h
View file @ f682a792
......@@ -8,7 +8,7 @@
DECLARE_PER_CPU(unsigned long, cpu_dr7);
#ifndef CONFIG_PARAVIRT
#ifndef CONFIG_PARAVIRT_XXL
/*
* These special macros can be used to get or set a debugging register
*/
......
arch/x86/include/asm/desc.h
View file @ f682a792
......@@ -108,7 +108,7 @@ static inline int desc_empty(const void *ptr)
return !(desc[0] | desc[1]);
}
#ifdef CONFIG_PARAVIRT
#ifdef CONFIG_PARAVIRT_XXL
#include <asm/paravirt.h>
#else
#define load_TR_desc() native_load_tr_desc()
......@@ -134,7 +134,7 @@ static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries)
static inline void paravirt_free_ldt(struct desc_struct *ldt, unsigned entries)
{
}
#endif /* CONFIG_PARAVIRT */
#endif /* CONFIG_PARAVIRT_XXL */
#define store_ldt(ldt) asm("sldt %0" : "=m"(ldt))
......
arch/x86/include/asm/fixmap.h
View file @ f682a792
......@@ -162,7 +162,7 @@ void __native_set_fixmap(enum fixed_addresses idx, pte_t pte);
void native_set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t flags);
#ifndef CONFIG_PARAVIRT
#ifndef CONFIG_PARAVIRT_XXL
static inline void __set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t flags)
{
......
arch/x86/include/asm/hyperv-tlfs.h
View file @ f682a792
......@@ -38,6 +38,8 @@
#define HV_MSR_TIME_REF_COUNT_AVAILABLE (1 << 1)
/* Partition reference TSC MSR is available */
#define HV_MSR_REFERENCE_TSC_AVAILABLE (1 << 9)
/* Partition Guest IDLE MSR is available */
#define HV_X64_MSR_GUEST_IDLE_AVAILABLE (1 << 10)
/* A partition's reference time stamp counter (TSC) page */
#define HV_X64_MSR_REFERENCE_TSC 0x40000021
......@@ -246,6 +248,9 @@
#define HV_X64_MSR_STIMER3_CONFIG 0x400000B6
#define HV_X64_MSR_STIMER3_COUNT 0x400000B7
/* Hyper-V guest idle MSR */
#define HV_X64_MSR_GUEST_IDLE 0x400000F0
/* Hyper-V guest crash notification MSR's */
#define HV_X64_MSR_CRASH_P0 0x40000100
#define HV_X64_MSR_CRASH_P1 0x40000101
......
arch/x86/include/asm/irqflags.h
View file @ f682a792
......@@ -64,7 +64,7 @@ static inline __cpuidle void native_halt(void)
#endif
#ifdef CONFIG_PARAVIRT
#ifdef CONFIG_PARAVIRT_XXL
#include <asm/paravirt.h>
#else
#ifndef __ASSEMBLY__
......@@ -123,6 +123,10 @@ static inline notrace unsigned long arch_local_irq_save(void)
#define DISABLE_INTERRUPTS(x) cli
#ifdef CONFIG_X86_64
#ifdef CONFIG_DEBUG_ENTRY
#define SAVE_FLAGS(x) pushfq; popq %rax
#endif
#define SWAPGS swapgs
/*
* Currently paravirt can't handle swapgs nicely when we
......@@ -135,8 +139,6 @@ static inline notrace unsigned long arch_local_irq_save(void)
*/
#define SWAPGS_UNSAFE_STACK swapgs
#define PARAVIRT_ADJUST_EXCEPTION_FRAME /* */
#define INTERRUPT_RETURN jmp native_iret
#define USERGS_SYSRET64 \
swapgs; \
......@@ -145,18 +147,12 @@ static inline notrace unsigned long arch_local_irq_save(void)
swapgs; \
sysretl
#ifdef CONFIG_DEBUG_ENTRY
#define SAVE_FLAGS(x) pushfq; popq %rax
#endif
#else
#define INTERRUPT_RETURN iret
#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit
#define GET_CR0_INTO_EAX movl %cr0, %eax
#endif
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_PARAVIRT */
#endif /* CONFIG_PARAVIRT_XXL */
#ifndef __ASSEMBLY__
static inline int arch_irqs_disabled_flags(unsigned long flags)
......
arch/x86/include/asm/mmu_context.h
View file @ f682a792
......@@ -16,12 +16,12 @@
extern atomic64_t last_mm_ctx_id;
#ifndef CONFIG_PARAVIRT
#ifndef CONFIG_PARAVIRT_XXL
static inline void paravirt_activate_mm(struct mm_struct *prev,
struct mm_struct *next)
{
}
#endif /* !CONFIG_PARAVIRT */
#endif /* !CONFIG_PARAVIRT_XXL */
#ifdef CONFIG_PERF_EVENTS
......
arch/x86/include/asm/mshyperv.h
View file @ f682a792
......@@ -351,6 +351,8 @@ int hyperv_flush_guest_mapping(u64 as);
#ifdef CONFIG_X86_64
void hv_apic_init(void);
void __init hv_init_spinlocks(void);
bool hv_vcpu_is_preempted(int vcpu);
#else
static inline void hv_apic_init(void) {}
#endif
......
arch/x86/include/asm/msr.h
View file @ f682a792
......@@ -242,7 +242,7 @@ static inline unsigned long long native_read_pmc(int counter)
return EAX_EDX_VAL(val, low, high);
}
#ifdef CONFIG_PARAVIRT
#ifdef CONFIG_PARAVIRT_XXL
#include <asm/paravirt.h>
#else
#include <linux/errno.h>
......@@ -305,7 +305,7 @@ do { \
#define rdpmcl(counter, val) ((val) = native_read_pmc(counter))
#endif /* !CONFIG_PARAVIRT */
#endif /* !CONFIG_PARAVIRT_XXL */
/*
* 64-bit version of wrmsr_safe():
......
arch/x86/include/asm/paravirt.h
View file @ f682a792
This diff is collapsed.
arch/x86/include/asm/paravirt_types.h
View file @ f682a792
......@@ -66,11 +66,13 @@ struct paravirt_callee_save {
/* general info */
struct pv_info {
#ifdef CONFIG_PARAVIRT_XXL
unsigned int kernel_rpl;
int shared_kernel_pmd;
#ifdef CONFIG_X86_64
u16 extra_user_64bit_cs; /* __USER_CS if none */
#endif
#endif
const char *name;
......@@ -85,17 +87,18 @@ struct pv_init_ops {
* the number of bytes of code generated, as we nop pad the
* rest in generic code.
*/
unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
unsigned (*patch)(u8 type, void *insnbuf,
unsigned long addr, unsigned len);
} __no_randomize_layout;
#ifdef CONFIG_PARAVIRT_XXL
struct pv_lazy_ops {
/* Set deferred update mode, used for batching operations. */
void (*enter)(void);
void (*leave)(void);
void (*flush)(void);
} __no_randomize_layout;
#endif
struct pv_time_ops {
unsigned long long (*sched_clock)(void);
......@@ -104,6 +107,9 @@ struct pv_time_ops {
struct pv_cpu_ops {
/* hooks for various privileged instructions */
void (*io_delay)(void);
#ifdef CONFIG_PARAVIRT_XXL
unsigned long (*get_debugreg)(int regno);
void (*set_debugreg)(int regno, unsigned long value);
......@@ -141,7 +147,6 @@ struct pv_cpu_ops {
void (*set_iopl_mask)(unsigned mask);
void (*wbinvd)(void);
void (*io_delay)(void);
/* cpuid emulation, mostly so that caps bits can be disabled */
void (*cpuid)(unsigned int *eax, unsigned int *ebx,
......@@ -176,9 +181,11 @@ struct pv_cpu_ops {
void (*start_context_switch)(struct task_struct *prev);
void (*end_context_switch)(struct task_struct *next);
#endif
} __no_randomize_layout;
struct pv_irq_ops {
#ifdef CONFIG_PARAVIRT_XXL
/*
* Get/set interrupt state. save_fl and restore_fl are only
* expected to use X86_EFLAGS_IF; all other bits
......@@ -195,35 +202,34 @@ struct pv_irq_ops {
void (*safe_halt)(void);
void (*halt)(void);
#endif
} __no_randomize_layout;
struct pv_mmu_ops {
/* TLB operations */
void (*flush_tlb_user)(void);
void (*flush_tlb_kernel)(void);
void (*flush_tlb_one_user)(unsigned long addr);
void (*flush_tlb_others)(const struct cpumask *cpus,
const struct flush_tlb_info *info);
void (*tlb_remove_table)(struct mmu_gather *tlb, void *table);
/* Hook for intercepting the destruction of an mm_struct. */
void (*exit_mmap)(struct mm_struct *mm);
#ifdef CONFIG_PARAVIRT_XXL
unsigned long (*read_cr2)(void);
void (*write_cr2)(unsigned long);
unsigned long (*read_cr3)(void);
void (*write_cr3)(unsigned long);
/*
* Hooks for intercepting the creation/use/destruction of an
* mm_struct.
*/
/* Hooks for intercepting the creation/use of an mm_struct. */
void (*activate_mm)(struct mm_struct *prev,
struct mm_struct *next);
void (*dup_mmap)(struct mm_struct *oldmm,
struct mm_struct *mm);
void (*exit_mmap)(struct mm_struct *mm);
/* TLB operations */
void (*flush_tlb_user)(void);
void (*flush_tlb_kernel)(void);
void (*flush_tlb_one_user)(unsigned long addr);
void (*flush_tlb_others)(const struct cpumask *cpus,
const struct flush_tlb_info *info);
void (*tlb_remove_table)(struct mmu_gather *tlb, void *table);
/* Hooks for allocating and freeing a pagetable top-level */
int (*pgd_alloc)(struct mm_struct *mm);
......@@ -298,6 +304,7 @@ struct pv_mmu_ops {
an mfn. We can tell which is which from the index. */
void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx,
phys_addr_t phys, pgprot_t flags);
#endif
} __no_randomize_layout;
struct arch_spinlock;
......@@ -321,28 +328,23 @@ struct pv_lock_ops {
* number for each function using the offset which we use to indicate
* what to patch. */
struct paravirt_patch_template {
struct pv_init_ops pv_init_ops;
struct pv_time_ops pv_time_ops;
struct pv_cpu_ops pv_cpu_ops;
struct pv_irq_ops pv_irq_ops;
struct pv_mmu_ops pv_mmu_ops;
struct pv_lock_ops pv_lock_ops;
struct pv_init_ops init;
struct pv_time_ops time;
struct pv_cpu_ops cpu;
struct pv_irq_ops irq;
struct pv_mmu_ops mmu;
struct pv_lock_ops lock;
} __no_randomize_layout;
extern struct pv_info pv_info;
extern struct pv_init_ops pv_init_ops;
extern struct pv_time_ops pv_time_ops;
extern struct pv_cpu_ops pv_cpu_ops;
extern struct pv_irq_ops pv_irq_ops;
extern struct pv_mmu_ops pv_mmu_ops;
extern struct pv_lock_ops pv_lock_ops;
extern struct paravirt_patch_template pv_ops;
#define PARAVIRT_PATCH(x) \
(offsetof(struct paravirt_patch_template, x) / sizeof(void *))
#define paravirt_type(op) \
[paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
[paravirt_opptr] "i" (&(op))
[paravirt_opptr] "i" (&(pv_ops.op))
#define paravirt_clobber(clobber) \
[paravirt_clobber] "i" (clobber)
......@@ -361,20 +363,13 @@ extern struct pv_lock_ops pv_lock_ops;
unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len);
unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len);
unsigned paravirt_patch_call(void *insnbuf,
const void *target, u16 tgt_clobbers,
unsigned long addr, u16 site_clobbers,
unsigned len);
unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
unsigned long addr, unsigned len);
unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
unsigned paravirt_patch_default(u8 type, void *insnbuf,
unsigned long addr, unsigned len);
unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
const char *start, const char *end);
unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
unsigned long addr, unsigned len);
unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len);
int paravirt_disable_iospace(void);
......@@ -488,9 +483,9 @@ int paravirt_disable_iospace(void);
#endif /* CONFIG_X86_32 */
#ifdef CONFIG_PARAVIRT_DEBUG
#define PVOP_TEST_NULL(op) BUG_ON(op == NULL)
#define PVOP_TEST_NULL(op) BUG_ON(pv_ops.op == NULL)
#else
#define PVOP_TEST_NULL(op) ((void)op)
#define PVOP_TEST_NULL(op) ((void)pv_ops.op)
#endif
#define PVOP_RETMASK(rettype) \
......@@ -666,7 +661,6 @@ struct paravirt_patch_site {
u8 *instr; /* original instructions */
u8 instrtype; /* type of this instruction */
u8 len; /* length of original instruction */
u16 clobbers; /* what registers you may clobber */
};
extern struct paravirt_patch_site __parainstructions[],
......
arch/x86/include/asm/pgalloc.h
View file @ f682a792
......@@ -8,7 +8,7 @@
static inline int __paravirt_pgd_alloc(struct mm_struct *mm) { return 0; }
#ifdef CONFIG_PARAVIRT
#ifdef CONFIG_PARAVIRT_XXL
#include <asm/paravirt.h>
#else
#define paravirt_pgd_alloc(mm) __paravirt_pgd_alloc(mm)
......
arch/x86/include/asm/pgtable-3level_types.h
View file @ f682a792
......@@ -20,7 +20,7 @@ typedef union {
} pte_t;
#endif /* !__ASSEMBLY__ */
#ifdef CONFIG_PARAVIRT
#ifdef CONFIG_PARAVIRT_XXL
#define SHARED_KERNEL_PMD ((!static_cpu_has(X86_FEATURE_PTI) && \
(pv_info.shared_kernel_pmd)))
#else
......
arch/x86/include/asm/pgtable.h
View file @ f682a792
......@@ -55,9 +55,9 @@ extern struct mm_struct *pgd_page_get_mm(struct page *page);
extern pmdval_t early_pmd_flags;
#ifdef CONFIG_PARAVIRT
#ifdef CONFIG_PARAVIRT_XXL
#include <asm/paravirt.h>
#else /* !CONFIG_PARAVIRT */
#else /* !CONFIG_PARAVIRT_XXL */
#define set_pte(ptep, pte) native_set_pte(ptep, pte)
#define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
......@@ -112,8 +112,7 @@ extern pmdval_t early_pmd_flags;
#define __pte(x) native_make_pte(x)
#define arch_end_context_switch(prev) do {} while(0)
#endif /* CONFIG_PARAVIRT */
#endif /* CONFIG_PARAVIRT_XXL */
/*
* The following only work if pte_present() is true.
......
arch/x86/include/asm/processor.h
View file @ f682a792
......@@ -579,7 +579,7 @@ static inline bool on_thread_stack(void)
current_stack_pointer) < THREAD_SIZE;
}
#ifdef CONFIG_PARAVIRT
#ifdef CONFIG_PARAVIRT_XXL
#include <asm/paravirt.h>
#else
#define __cpuid native_cpuid
......@@ -590,7 +590,7 @@ static inline void load_sp0(unsigned long sp0)
}
#define set_iopl_mask native_set_iopl_mask
#endif /* CONFIG_PARAVIRT */
#endif /* CONFIG_PARAVIRT_XXL */
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
......
arch/x86/include/asm/ptrace.h
View file @ f682a792
......@@ -146,7 +146,7 @@ static inline int v8086_mode(struct pt_regs *regs)
static inline bool user_64bit_mode(struct pt_regs *regs)
{
#ifdef CONFIG_X86_64
#ifndef CONFIG_PARAVIRT
#ifndef CONFIG_PARAVIRT_XXL
/*
* On non-paravirt systems, this is the only long mode CPL 3
* selector. We do not allow long mode selectors in the LDT.
......
arch/x86/include/asm/segment.h
View file @ f682a792
......@@ -210,7 +210,7 @@
#endif
#ifndef CONFIG_PARAVIRT
#ifndef CONFIG_PARAVIRT_XXL
# define get_kernel_rpl() 0
#endif
......
arch/x86/include/asm/special_insns.h
View file @ f682a792
......@@ -141,7 +141,7 @@ static inline unsigned long __read_cr4(void)
return native_read_cr4();
}
#ifdef CONFIG_PARAVIRT
#ifdef CONFIG_PARAVIRT_XXL
#include <asm/paravirt.h>
#else
......@@ -208,7 +208,7 @@ static inline void load_gs_index(unsigned selector)
#endif
#endif/* CONFIG_PARAVIRT */
#endif /* CONFIG_PARAVIRT_XXL */
static inline void clflush(volatile void *__p)
{
......
arch/x86/kernel/alternative.c
View file @ f682a792
......@@ -598,7 +598,7 @@ void __init_or_module apply_paravirt(struct paravirt_patch_site *start,
BUG_ON(p->len > MAX_PATCH_LEN);
/* prep the buffer with the original instructions */
memcpy(insnbuf, p->instr, p->len);
used = pv_init_ops.patch(p->instrtype, p->clobbers, insnbuf,
used = pv_ops.init.patch(p->instrtype, insnbuf,
(unsigned long)p->instr, p->len);
BUG_ON(used > p->len);
......
arch/x86/kernel/asm-offsets.c
View file @ f682a792
......@@ -64,15 +64,12 @@ void common(void) {
OFFSET(IA32_RT_SIGFRAME_sigcontext, rt_sigframe_ia32, uc.uc_mcontext);
#endif
#ifdef CONFIG_PARAVIRT
#ifdef CONFIG_PARAVIRT_XXL
BLANK();
OFFSET(PARAVIRT_PATCH_pv_cpu_ops, paravirt_patch_template, pv_cpu_ops);
OFFSET(PARAVIRT_PATCH_pv_irq_ops, paravirt_patch_template, pv_irq_ops);
OFFSET(PV_IRQ_irq_disable, pv_irq_ops, irq_disable);
OFFSET(PV_IRQ_irq_enable, pv_irq_ops, irq_enable);
OFFSET(PV_CPU_iret, pv_cpu_ops, iret);
OFFSET(PV_CPU_read_cr0, pv_cpu_ops, read_cr0);
OFFSET(PV_MMU_read_cr2, pv_mmu_ops, read_cr2);
OFFSET(PV_IRQ_irq_disable, paravirt_patch_template, irq.irq_disable);
OFFSET(PV_IRQ_irq_enable, paravirt_patch_template, irq.irq_enable);
OFFSET(PV_CPU_iret, paravirt_patch_template, cpu.iret);
OFFSET(PV_MMU_read_cr2, paravirt_patch_template, mmu.read_cr2);
#endif
#ifdef CONFIG_XEN
......
arch/x86/kernel/asm-offsets_64.c
View file @ f682a792
......@@ -21,10 +21,13 @@ static char syscalls_ia32[] = {
int main(void)
{
#ifdef CONFIG_PARAVIRT
OFFSET(PV_CPU_usergs_sysret64, pv_cpu_ops, usergs_sysret64);
OFFSET(PV_CPU_swapgs, pv_cpu_ops, swapgs);
#ifdef CONFIG_PARAVIRT_XXL
OFFSET(PV_CPU_usergs_sysret64, paravirt_patch_template,
cpu.usergs_sysret64);
OFFSET(PV_CPU_swapgs, paravirt_patch_template, cpu.swapgs);
#ifdef CONFIG_DEBUG_ENTRY
OFFSET(PV_IRQ_save_fl, pv_irq_ops, save_fl);
OFFSET(PV_IRQ_save_fl, paravirt_patch_template, irq.save_fl);
#endif
#endif
BLANK();
#endif
......
arch/x86/kernel/cpu/common.c
View file @ f682a792
......@@ -1243,10 +1243,10 @@ static void generic_identify(struct cpuinfo_x86 *c)
* ESPFIX issue, we can change this.
*/
#ifdef CONFIG_X86_32
# ifdef CONFIG_PARAVIRT
# ifdef CONFIG_PARAVIRT_XXL
do {
extern void native_iret(void);
if (pv_cpu_ops.iret == native_iret)
if (pv_ops.cpu.iret == native_iret)
set_cpu_bug(c, X86_BUG_ESPFIX);
} while (0);
# else
......
arch/x86/kernel/cpu/mshyperv.c
View file @ f682a792
......@@ -199,6 +199,16 @@ static unsigned long hv_get_tsc_khz(void)
return freq / 1000;
}
#if defined(CONFIG_SMP) && IS_ENABLED(CONFIG_HYPERV)
static void __init hv_smp_prepare_boot_cpu(void)
{
native_smp_prepare_boot_cpu();
#if defined(CONFIG_X86_64) && defined(CONFIG_PARAVIRT_SPINLOCKS)
hv_init_spinlocks();
#endif
}
#endif
static void __init ms_hyperv_init_platform(void)
{
int hv_host_info_eax;
......@@ -303,6 +313,10 @@ static void __init ms_hyperv_init_platform(void)
if (ms_hyperv.misc_features & HV_STIMER_DIRECT_MODE_AVAILABLE)
alloc_intr_gate(HYPERV_STIMER0_VECTOR,
hv_stimer0_callback_vector);
# ifdef CONFIG_SMP
smp_ops.smp_prepare_boot_cpu = hv_smp_prepare_boot_cpu;
# endif
#endif
}
......
arch/x86/kernel/cpu/vmware.c
View file @ f682a792
......@@ -97,14 +97,14 @@ static void __init vmware_sched_clock_setup(void)
d->cyc2ns_offset = mul_u64_u32_shr(tsc_now, d->cyc2ns_mul,
d->cyc2ns_shift);
pv_time_ops.sched_clock = vmware_sched_clock;
pv_ops.time.sched_clock = vmware_sched_clock;
pr_info("using sched offset of %llu ns\n", d->cyc2ns_offset);
}
static void __init vmware_paravirt_ops_setup(void)
{
pv_info.name = "VMware hypervisor";
pv_cpu_ops.io_delay = paravirt_nop;
pv_ops.cpu.io_delay = paravirt_nop;
if (vmware_tsc_khz && vmw_sched_clock)
vmware_sched_clock_setup();
......
arch/x86/kernel/head_64.S
View file @ f682a792
......@@ -26,7 +26,7 @@
#include <asm/nospec-branch.h>
#include <asm/fixmap.h>
#ifdef CONFIG_PARAVIRT
#ifdef CONFIG_PARAVIRT_XXL
#include <asm/asm-offsets.h>
#include <asm/paravirt.h>
#define GET_CR2_INTO(reg) GET_CR2_INTO_RAX ; movq %rax, reg
......
arch/x86/kernel/kvm.c
View file @ f682a792
......@@ -283,7 +283,7 @@ static void __init paravirt_ops_setup(void)
pv_info.name = "KVM";
if (kvm_para_has_feature(KVM_FEATURE_NOP_IO_DELAY))
pv_cpu_ops.io_delay = kvm_io_delay;
pv_ops.cpu.io_delay = kvm_io_delay;
#ifdef CONFIG_X86_IO_APIC
no_timer_check = 1;
......@@ -632,14 +632,14 @@ static void __init kvm_guest_init(void)
if (kvm_para_has_feature(KVM_FEATURE_STEAL_TIME)) {
has_steal_clock = 1;
pv_time_ops.steal_clock = kvm_steal_clock;
pv_ops.time.steal_clock = kvm_steal_clock;
}
if (kvm_para_has_feature(KVM_FEATURE_PV_TLB_FLUSH) &&
!kvm_para_has_hint(KVM_HINTS_REALTIME) &&
kvm_para_has_feature(KVM_FEATURE_STEAL_TIME)) {
pv_mmu_ops.flush_tlb_others = kvm_flush_tlb_others;
pv_mmu_ops.tlb_remove_table = tlb_remove_table;
pv_ops.mmu.flush_tlb_others = kvm_flush_tlb_others;
pv_ops.mmu.tlb_remove_table = tlb_remove_table;
}
if (kvm_para_has_feature(KVM_FEATURE_PV_EOI))
......@@ -850,13 +850,14 @@ void __init kvm_spinlock_init(void)
return;
__pv_init_lock_hash();
pv_lock_ops.queued_spin_lock_slowpath = __pv_queued_spin_lock_slowpath;
pv_lock_ops.queued_spin_unlock = PV_CALLEE_SAVE(__pv_queued_spin_unlock);
pv_lock_ops.wait = kvm_wait;
pv_lock_ops.kick = kvm_kick_cpu;
pv_ops.lock.queued_spin_lock_slowpath = __pv_queued_spin_lock_slowpath;
pv_ops.lock.queued_spin_unlock =
PV_CALLEE_SAVE(__pv_queued_spin_unlock);
pv_ops.lock.wait = kvm_wait;
pv_ops.lock.kick = kvm_kick_cpu;
if (kvm_para_has_feature(KVM_FEATURE_STEAL_TIME)) {
pv_lock_ops.vcpu_is_preempted =
pv_ops.lock.vcpu_is_preempted =
PV_CALLEE_SAVE(__kvm_vcpu_is_preempted);
}
}
......
arch/x86/kernel/kvmclock.c
View file @ f682a792
......@@ -118,13 +118,13 @@ static u64 kvm_sched_clock_read(void)
static inline void kvm_sched_clock_init(bool stable)
{
if (!stable) {
pv_time_ops.sched_clock = kvm_clock_read;
pv_ops.time.sched_clock = kvm_clock_read;
clear_sched_clock_stable();
return;
}
kvm_sched_clock_offset = kvm_clock_read();
pv_time_ops.sched_clock = kvm_sched_clock_read;
pv_ops.time.sched_clock = kvm_sched_clock_read;
pr_info("kvm-clock: using sched offset of %llu cycles",
kvm_sched_clock_offset);
......
arch/x86/kernel/paravirt-spinlocks.c
View file @ f682a792
......@@ -17,7 +17,7 @@ PV_CALLEE_SAVE_REGS_THUNK(__native_queued_spin_unlock);
bool pv_is_native_spin_unlock(void)
{
return pv_lock_ops.queued_spin_unlock.func ==
return pv_ops.lock.queued_spin_unlock.func ==
__raw_callee_save___native_queued_spin_unlock;
}
......@@ -29,17 +29,6 @@ PV_CALLEE_SAVE_REGS_THUNK(__native_vcpu_is_preempted);
bool pv_is_native_vcpu_is_preempted(void)
{
return pv_lock_ops.vcpu_is_preempted.func ==
return pv_ops.lock.vcpu_is_preempted.func ==
__raw_callee_save___native_vcpu_is_preempted;
}
struct pv_lock_ops pv_lock_ops = {
#ifdef CONFIG_SMP
.queued_spin_lock_slowpath = native_queued_spin_lock_slowpath,
.queued_spin_unlock = PV_CALLEE_SAVE(__native_queued_spin_unlock),
.wait = paravirt_nop,
.kick = paravirt_nop,
.vcpu_is_preempted = PV_CALLEE_SAVE(__native_vcpu_is_preempted),
#endif /* SMP */
};
EXPORT_SYMBOL(pv_lock_ops);
arch/x86/kernel/paravirt.c
View file @ f682a792
This diff is collapsed.
arch/x86/kernel/paravirt_patch_32.c
View file @ f682a792
// SPDX-License-Identifier: GPL-2.0
#include <asm/paravirt.h>
DEF_NATIVE(pv_irq_ops, irq_disable, "cli");
DEF_NATIVE(pv_irq_ops, irq_enable, "sti");
DEF_NATIVE(pv_irq_ops, restore_fl, "push %eax; popf");
DEF_NATIVE(pv_irq_ops, save_fl, "pushf; pop %eax");
DEF_NATIVE(pv_cpu_ops, iret, "iret");
DEF_NATIVE(pv_mmu_ops, read_cr2, "mov %cr2, %eax");
DEF_NATIVE(pv_mmu_ops, write_cr3, "mov %eax, %cr3");
DEF_NATIVE(pv_mmu_ops, read_cr3, "mov %cr3, %eax");
#ifdef CONFIG_PARAVIRT_XXL
DEF_NATIVE(irq, irq_disable, "cli");
DEF_NATIVE(irq, irq_enable, "sti");
DEF_NATIVE(irq, restore_fl, "push %eax; popf");
DEF_NATIVE(irq, save_fl, "pushf; pop %eax");
DEF_NATIVE(cpu, iret, "iret");
DEF_NATIVE(mmu, read_cr2, "mov %cr2, %eax");
DEF_NATIVE(mmu, write_cr3, "mov %eax, %cr3");
DEF_NATIVE(mmu, read_cr3, "mov %cr3, %eax");
#endif
#if defined(CONFIG_PARAVIRT_SPINLOCKS)
DEF_NATIVE(pv_lock_ops, queued_spin_unlock, "movb $0, (%eax)");
DEF_NATIVE(pv_lock_ops, vcpu_is_preempted, "xor %eax, %eax");
DEF_NATIVE(lock, queued_spin_unlock, "movb $0, (%eax)");
DEF_NATIVE(lock, vcpu_is_preempted, "xor %eax, %eax");
#endif
unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len)
......@@ -30,53 +32,42 @@ unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
extern bool pv_is_native_spin_unlock(void);
extern bool pv_is_native_vcpu_is_preempted(void);
unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
unsigned long addr, unsigned len)
unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len)
{
const unsigned char *start, *end;
unsigned ret;
#define PATCH_SITE(ops, x) \
case PARAVIRT_PATCH(ops.x): \
start = start_##ops##_##x; \
end = end_##ops##_##x; \
goto patch_site
case PARAVIRT_PATCH(ops.x): \
return paravirt_patch_insns(ibuf, len, start_##ops##_##x, end_##ops##_##x)
switch (type) {
PATCH_SITE(pv_irq_ops, irq_disable);
PATCH_SITE(pv_irq_ops, irq_enable);
PATCH_SITE(pv_irq_ops, restore_fl);
PATCH_SITE(pv_irq_ops, save_fl);
PATCH_SITE(pv_cpu_ops, iret);
PATCH_SITE(pv_mmu_ops, read_cr2);
PATCH_SITE(pv_mmu_ops, read_cr3);
PATCH_SITE(pv_mmu_ops, write_cr3);
#ifdef CONFIG_PARAVIRT_XXL
PATCH_SITE(irq, irq_disable);
PATCH_SITE(irq, irq_enable);
PATCH_SITE(irq, restore_fl);
PATCH_SITE(irq, save_fl);
PATCH_SITE(cpu, iret);
PATCH_SITE(mmu, read_cr2);
PATCH_SITE(mmu, read_cr3);
PATCH_SITE(mmu, write_cr3);
#endif
#if defined(CONFIG_PARAVIRT_SPINLOCKS)
case PARAVIRT_PATCH(pv_lock_ops.queued_spin_unlock):
if (pv_is_native_spin_unlock()) {
start = start_pv_lock_ops_queued_spin_unlock;
end = end_pv_lock_ops_queued_spin_unlock;
goto patch_site;
}
goto patch_default;
case PARAVIRT_PATCH(lock.queued_spin_unlock):
if (pv_is_native_spin_unlock())
return paravirt_patch_insns(ibuf, len,
start_lock_queued_spin_unlock,
end_lock_queued_spin_unlock);
break;
case PARAVIRT_PATCH(pv_lock_ops.vcpu_is_preempted):
if (pv_is_native_vcpu_is_preempted()) {
start = start_pv_lock_ops_vcpu_is_preempted;
end = end_pv_lock_ops_vcpu_is_preempted;
goto patch_site;
}
goto patch_default;
case PARAVIRT_PATCH(lock.vcpu_is_preempted):
if (pv_is_native_vcpu_is_preempted())
return paravirt_patch_insns(ibuf, len,
start_lock_vcpu_is_preempted,
end_lock_vcpu_is_preempted);
break;
#endif
default:
patch_default: __maybe_unused
ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
break;
patch_site:
ret = paravirt_patch_insns(ibuf, len, start, end);
break;
}
#undef PATCH_SITE
return ret;
return paravirt_patch_default(type, ibuf, addr, len);
}
arch/x86/kernel/paravirt_patch_64.c
View file @ f682a792
......@@ -3,24 +3,26 @@
#include <asm/asm-offsets.h>
#include <linux/stringify.h>
DEF_NATIVE(pv_irq_ops, irq_disable, "cli");
DEF_NATIVE(pv_irq_ops, irq_enable, "sti");
DEF_NATIVE(pv_irq_ops, restore_fl, "pushq %rdi; popfq");
DEF_NATIVE(pv_irq_ops, save_fl, "pushfq; popq %rax");
DEF_NATIVE(pv_mmu_ops, read_cr2, "movq %cr2, %rax");
DEF_NATIVE(pv_mmu_ops, read_cr3, "movq %cr3, %rax");
DEF_NATIVE(pv_mmu_ops, write_cr3, "movq %rdi, %cr3");
DEF_NATIVE(pv_cpu_ops, wbinvd, "wbinvd");
#ifdef CONFIG_PARAVIRT_XXL
DEF_NATIVE(irq, irq_disable, "cli");
DEF_NATIVE(irq, irq_enable, "sti");
DEF_NATIVE(irq, restore_fl, "pushq %rdi; popfq");
DEF_NATIVE(irq, save_fl, "pushfq; popq %rax");
DEF_NATIVE(mmu, read_cr2, "movq %cr2, %rax");
DEF_NATIVE(mmu, read_cr3, "movq %cr3, %rax");
DEF_NATIVE(mmu, write_cr3, "movq %rdi, %cr3");
DEF_NATIVE(cpu, wbinvd, "wbinvd");
DEF_NATIVE(pv_cpu_ops, usergs_sysret64, "swapgs; sysretq");
DEF_NATIVE(pv_cpu_ops, swapgs, "swapgs");
DEF_NATIVE(cpu, usergs_sysret64, "swapgs; sysretq");
DEF_NATIVE(cpu, swapgs, "swapgs");
#endif
DEF_NATIVE(, mov32, "mov %edi, %eax");
DEF_NATIVE(, mov64, "mov %rdi, %rax");
#if defined(CONFIG_PARAVIRT_SPINLOCKS)
DEF_NATIVE(pv_lock_ops, queued_spin_unlock, "movb $0, (%rdi)");
DEF_NATIVE(pv_lock_ops, vcpu_is_preempted, "xor %eax, %eax");
DEF_NATIVE(lock, queued_spin_unlock, "movb $0, (%rdi)");
DEF_NATIVE(lock, vcpu_is_preempted, "xor %eax, %eax");
#endif
unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len)
......@@ -38,55 +40,44 @@ unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
extern bool pv_is_native_spin_unlock(void);
extern bool pv_is_native_vcpu_is_preempted(void);
unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
unsigned long addr, unsigned len)
unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len)
{
const unsigned char *start, *end;
unsigned ret;
#define PATCH_SITE(ops, x) \
case PARAVIRT_PATCH(ops.x): \
start = start_##ops##_##x; \
end = end_##ops##_##x; \
goto patch_site
switch(type) {
PATCH_SITE(pv_irq_ops, restore_fl);
PATCH_SITE(pv_irq_ops, save_fl);
PATCH_SITE(pv_irq_ops, irq_enable);
PATCH_SITE(pv_irq_ops, irq_disable);
PATCH_SITE(pv_cpu_ops, usergs_sysret64);
PATCH_SITE(pv_cpu_ops, swapgs);
PATCH_SITE(pv_mmu_ops, read_cr2);
PATCH_SITE(pv_mmu_ops, read_cr3);
PATCH_SITE(pv_mmu_ops, write_cr3);
PATCH_SITE(pv_cpu_ops, wbinvd);
#if defined(CONFIG_PARAVIRT_SPINLOCKS)
case PARAVIRT_PATCH(pv_lock_ops.queued_spin_unlock):
if (pv_is_native_spin_unlock()) {
start = start_pv_lock_ops_queued_spin_unlock;
end = end_pv_lock_ops_queued_spin_unlock;
goto patch_site;
}
goto patch_default;
case PARAVIRT_PATCH(ops.x): \
return paravirt_patch_insns(ibuf, len, start_##ops##_##x, end_##ops##_##x)
case PARAVIRT_PATCH(pv_lock_ops.vcpu_is_preempted):
if (pv_is_native_vcpu_is_preempted()) {
start = start_pv_lock_ops_vcpu_is_preempted;
end = end_pv_lock_ops_vcpu_is_preempted;
goto patch_site;
}
goto patch_default;
switch (type) {
#ifdef CONFIG_PARAVIRT_XXL
PATCH_SITE(irq, restore_fl);
PATCH_SITE(irq, save_fl);
PATCH_SITE(irq, irq_enable);
PATCH_SITE(irq, irq_disable);
PATCH_SITE(cpu, usergs_sysret64);
PATCH_SITE(cpu, swapgs);
PATCH_SITE(cpu, wbinvd);
PATCH_SITE(mmu, read_cr2);
PATCH_SITE(mmu, read_cr3);
PATCH_SITE(mmu, write_cr3);
#endif
#if defined(CONFIG_PARAVIRT_SPINLOCKS)
case PARAVIRT_PATCH(lock.queued_spin_unlock):
if (pv_is_native_spin_unlock())
return paravirt_patch_insns(ibuf, len,
start_lock_queued_spin_unlock,
end_lock_queued_spin_unlock);
break;
default:
patch_default: __maybe_unused
ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
case PARAVIRT_PATCH(lock.vcpu_is_preempted):
if (pv_is_native_vcpu_is_preempted())
return paravirt_patch_insns(ibuf, len,
start_lock_vcpu_is_preempted,
end_lock_vcpu_is_preempted);
break;
#endif
patch_site:
ret = paravirt_patch_insns(ibuf, len, start, end);
default:
break;
}
#undef PATCH_SITE
return ret;
return paravirt_patch_default(type, ibuf, addr, len);
}
arch/x86/kernel/tsc.c
View file @ f682a792
......@@ -247,7 +247,7 @@ unsigned long long sched_clock(void)
bool using_native_sched_clock(void)
{
return pv_time_ops.sched_clock == native_sched_clock;
return pv_ops.time.sched_clock == native_sched_clock;
}
#else
unsigned long long
......
arch/x86/kernel/vsmp_64.c
View file @ f682a792
......@@ -26,7 +26,7 @@
#define TOPOLOGY_REGISTER_OFFSET 0x10
#if defined CONFIG_PCI && defined CONFIG_PARAVIRT
#if defined CONFIG_PCI && defined CONFIG_PARAVIRT_XXL
/*
* Interrupt control on vSMPowered systems:
* ~AC is a shadow of IF. If IF is 'on' AC should be 'off'
......@@ -69,17 +69,17 @@ asmlinkage __visible void vsmp_irq_enable(void)
}
PV_CALLEE_SAVE_REGS_THUNK(vsmp_irq_enable);
static unsigned __init vsmp_patch(u8 type, u16 clobbers, void *ibuf,
static unsigned __init vsmp_patch(u8 type, void *ibuf,
unsigned long addr, unsigned len)
{
switch (type) {
case PARAVIRT_PATCH(pv_irq_ops.irq_enable):
case PARAVIRT_PATCH(pv_irq_ops.irq_disable):
case PARAVIRT_PATCH(pv_irq_ops.save_fl):
case PARAVIRT_PATCH(pv_irq_ops.restore_fl):
return paravirt_patch_default(type, clobbers, ibuf, addr, len);
case PARAVIRT_PATCH(irq.irq_enable):
case PARAVIRT_PATCH(irq.irq_disable):
case PARAVIRT_PATCH(irq.save_fl):
case PARAVIRT_PATCH(irq.restore_fl):
return paravirt_patch_default(type, ibuf, addr, len);
default:
return native_patch(type, clobbers, ibuf, addr, len);
return native_patch(type, ibuf, addr, len);
}
}
......@@ -111,11 +111,11 @@ static void __init set_vsmp_pv_ops(void)
if (cap & ctl & (1 << 4)) {
/* Setup irq ops and turn on vSMP IRQ fastpath handling */
pv_irq_ops.irq_disable = PV_CALLEE_SAVE(vsmp_irq_disable);
pv_irq_ops.irq_enable = PV_CALLEE_SAVE(vsmp_irq_enable);
pv_irq_ops.save_fl = PV_CALLEE_SAVE(vsmp_save_fl);
pv_irq_ops.restore_fl = PV_CALLEE_SAVE(vsmp_restore_fl);
pv_init_ops.patch = vsmp_patch;
pv_ops.irq.irq_disable = PV_CALLEE_SAVE(vsmp_irq_disable);
pv_ops.irq.irq_enable = PV_CALLEE_SAVE(vsmp_irq_enable);
pv_ops.irq.save_fl = PV_CALLEE_SAVE(vsmp_save_fl);
pv_ops.irq.restore_fl = PV_CALLEE_SAVE(vsmp_restore_fl);
pv_ops.init.patch = vsmp_patch;
ctl &= ~(1 << 4);
}
writel(ctl, address + 4);
......
arch/x86/mm/mem_encrypt_identity.c
View file @ f682a792
......@@ -27,6 +27,7 @@
* be extended when new paravirt and debugging variants are added.)
*/
#undef CONFIG_PARAVIRT
#undef CONFIG_PARAVIRT_XXL
#undef CONFIG_PARAVIRT_SPINLOCKS
#include <linux/kernel.h>
......
arch/x86/xen/Kconfig
View file @ f682a792
......@@ -18,6 +18,7 @@ config XEN_PV
bool "Xen PV guest support"
default y
depends on XEN
select PARAVIRT_XXL
select XEN_HAVE_PVMMU
select XEN_HAVE_VPMU
help
......
arch/x86/xen/Makefile
View file @ f682a792
......@@ -12,25 +12,46 @@ endif
# Make sure early boot has no stackprotector
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_enlighten_pv.o := $(nostackp)
CFLAGS_mmu_pv.o := $(nostackp)
CFLAGS_mmu_pv.o := $(nostackp)
obj-y := enlighten.o multicalls.o mmu.o irq.o \
time.o xen-asm.o xen-asm_$(BITS).o \
grant-table.o suspend.o platform-pci-unplug.o
obj-y += enlighten.o
obj-y += mmu.o
obj-y += time.o
obj-y += grant-table.o
obj-y += suspend.o
obj-$(CONFIG_XEN_PVHVM) += enlighten_hvm.o mmu_hvm.o suspend_hvm.o
obj-$(CONFIG_XEN_PV) += setup.o apic.o pmu.o suspend_pv.o \
p2m.o enlighten_pv.o mmu_pv.o
obj-$(CONFIG_XEN_PVH) += enlighten_pvh.o
obj-$(CONFIG_XEN_PVHVM) += enlighten_hvm.o
obj-$(CONFIG_XEN_PVHVM) += mmu_hvm.o
obj-$(CONFIG_XEN_PVHVM) += suspend_hvm.o
obj-$(CONFIG_XEN_PVHVM) += platform-pci-unplug.o
obj-$(CONFIG_EVENT_TRACING) += trace.o
obj-$(CONFIG_XEN_PV) += setup.o
obj-$(CONFIG_XEN_PV) += apic.o
obj-$(CONFIG_XEN_PV) += pmu.o
obj-$(CONFIG_XEN_PV) += suspend_pv.o
obj-$(CONFIG_XEN_PV) += p2m.o
obj-$(CONFIG_XEN_PV) += enlighten_pv.o
obj-$(CONFIG_XEN_PV) += mmu_pv.o
obj-$(CONFIG_XEN_PV) += irq.o
obj-$(CONFIG_XEN_PV) += multicalls.o
obj-$(CONFIG_XEN_PV) += xen-asm.o
obj-$(CONFIG_XEN_PV) += xen-asm_$(BITS).o
obj-$(CONFIG_XEN_PVH) += enlighten_pvh.o
obj-$(CONFIG_XEN_PVH) += xen-pvh.o
obj-$(CONFIG_EVENT_TRACING) += trace.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_XEN_PV_SMP) += smp_pv.o
obj-$(CONFIG_XEN_PVHVM_SMP) += smp_hvm.o
obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o
obj-$(CONFIG_XEN_DOM0) += vga.o
obj-$(CONFIG_SWIOTLB_XEN) += pci-swiotlb-xen.o
obj-$(CONFIG_XEN_EFI) += efi.o
obj-$(CONFIG_XEN_PVH) += xen-pvh.o
arch/x86/xen/efi.c
View file @ f682a792
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2014 Oracle Co., Daniel Kiper
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/bitops.h>
......
arch/x86/xen/enlighten.c
View file @ f682a792
// SPDX-License-Identifier: GPL-2.0
#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
#include <linux/bootmem.h>
#endif
......
arch/x86/xen/enlighten_hvm.c
View file @ f682a792
// SPDX-License-Identifier: GPL-2.0
#include <linux/acpi.h>
#include <linux/cpu.h>
#include <linux/kexec.h>
......
arch/x86/xen/enlighten_pv.c
View file @ f682a792
......@@ -995,11 +995,14 @@ void __init xen_setup_vcpu_info_placement(void)
* percpu area for all cpus, so make use of it.
*/
if (xen_have_vcpu_info_placement) {
pv_irq_ops.save_fl = __PV_IS_CALLEE_SAVE(xen_save_fl_direct);
pv_irq_ops.restore_fl = __PV_IS_CALLEE_SAVE(xen_restore_fl_direct);
pv_irq_ops.irq_disable = __PV_IS_CALLEE_SAVE(xen_irq_disable_direct);
pv_irq_ops.irq_enable = __PV_IS_CALLEE_SAVE(xen_irq_enable_direct);
pv_mmu_ops.read_cr2 = xen_read_cr2_direct;
pv_ops.irq.save_fl = __PV_IS_CALLEE_SAVE(xen_save_fl_direct);
pv_ops.irq.restore_fl =
__PV_IS_CALLEE_SAVE(xen_restore_fl_direct);
pv_ops.irq.irq_disable =
__PV_IS_CALLEE_SAVE(xen_irq_disable_direct);
pv_ops.irq.irq_enable =
__PV_IS_CALLEE_SAVE(xen_irq_enable_direct);
pv_ops.mmu.read_cr2 = xen_read_cr2_direct;
}
}
......@@ -1174,14 +1177,14 @@ static void __init xen_boot_params_init_edd(void)
*/
static void __init xen_setup_gdt(int cpu)
{
pv_cpu_ops.write_gdt_entry = xen_write_gdt_entry_boot;
pv_cpu_ops.load_gdt = xen_load_gdt_boot;
pv_ops.cpu.write_gdt_entry = xen_write_gdt_entry_boot;
pv_ops.cpu.load_gdt = xen_load_gdt_boot;
setup_stack_canary_segment(cpu);
switch_to_new_gdt(cpu);
pv_cpu_ops.write_gdt_entry = xen_write_gdt_entry;
pv_cpu_ops.load_gdt = xen_load_gdt;
pv_ops.cpu.write_gdt_entry = xen_write_gdt_entry;
pv_ops.cpu.load_gdt = xen_load_gdt;
}
static void __init xen_dom0_set_legacy_features(void)
......@@ -1206,8 +1209,8 @@ asmlinkage __visible void __init xen_start_kernel(void)
/* Install Xen paravirt ops */
pv_info = xen_info;
pv_init_ops.patch = paravirt_patch_default;
pv_cpu_ops = xen_cpu_ops;
pv_ops.init.patch = paravirt_patch_default;
pv_ops.cpu = xen_cpu_ops;
xen_init_irq_ops();
/*
......@@ -1276,8 +1279,10 @@ asmlinkage __visible void __init xen_start_kernel(void)
#endif
if (xen_feature(XENFEAT_mmu_pt_update_preserve_ad)) {
pv_mmu_ops.ptep_modify_prot_start = xen_ptep_modify_prot_start;
pv_mmu_ops.ptep_modify_prot_commit = xen_ptep_modify_prot_commit;
pv_ops.mmu.ptep_modify_prot_start =
xen_ptep_modify_prot_start;
pv_ops.mmu.ptep_modify_prot_commit =
xen_ptep_modify_prot_commit;
}
machine_ops = xen_machine_ops;
......
arch/x86/xen/grant-table.c
View file @ f682a792
// SPDX-License-Identifier: GPL-2.0 OR MIT
/******************************************************************************
* grant_table.c
* x86 specific part
......@@ -8,30 +9,6 @@
* Copyright (c) 2004-2005, K A Fraser
* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan. Split out x86 specific part.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation; or, when distributed
* separately from the Linux kernel or incorporated into other
* software packages, subject to the following license:
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this source file (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy, modify,
* merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <linux/sched.h>
......
arch/x86/xen/irq.c
View file @ f682a792
......@@ -128,6 +128,6 @@ static const struct pv_irq_ops xen_irq_ops __initconst = {
void __init xen_init_irq_ops(void)
{
pv_irq_ops = xen_irq_ops;
pv_ops.irq = xen_irq_ops;
x86_init.irqs.intr_init = xen_init_IRQ;
}
arch/x86/xen/mmu.c
View file @ f682a792
// SPDX-License-Identifier: GPL-2.0
#include <linux/pfn.h>
#include <asm/xen/page.h>
#include <asm/xen/hypercall.h>
......@@ -6,12 +8,6 @@
#include "multicalls.h"
#include "mmu.h"
/*
* Protects atomic reservation decrease/increase against concurrent increases.
* Also protects non-atomic updates of current_pages and balloon lists.
*/
DEFINE_SPINLOCK(xen_reservation_lock);
unsigned long arbitrary_virt_to_mfn(void *vaddr)
{
xmaddr_t maddr = arbitrary_virt_to_machine(vaddr);
......@@ -42,186 +38,6 @@ xmaddr_t arbitrary_virt_to_machine(void *vaddr)
}
EXPORT_SYMBOL_GPL(arbitrary_virt_to_machine);
static noinline void xen_flush_tlb_all(void)
{
struct mmuext_op *op;
struct multicall_space mcs;
preempt_disable();
mcs = xen_mc_entry(sizeof(*op));
op = mcs.args;
op->cmd = MMUEXT_TLB_FLUSH_ALL;
MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);
xen_mc_issue(PARAVIRT_LAZY_MMU);
preempt_enable();
}
#define REMAP_BATCH_SIZE 16
struct remap_data {
xen_pfn_t *pfn;
bool contiguous;
bool no_translate;
pgprot_t prot;
struct mmu_update *mmu_update;
};
static int remap_area_pfn_pte_fn(pte_t *ptep, pgtable_t token,
unsigned long addr, void *data)
{
struct remap_data *rmd = data;
pte_t pte = pte_mkspecial(mfn_pte(*rmd->pfn, rmd->prot));
/*
* If we have a contiguous range, just update the pfn itself,
* else update pointer to be "next pfn".
*/
if (rmd->contiguous)
(*rmd->pfn)++;
else
rmd->pfn++;
rmd->mmu_update->ptr = virt_to_machine(ptep).maddr;
rmd->mmu_update->ptr |= rmd->no_translate ?
MMU_PT_UPDATE_NO_TRANSLATE :
MMU_NORMAL_PT_UPDATE;
rmd->mmu_update->val = pte_val_ma(pte);
rmd->mmu_update++;
return 0;
}
static int do_remap_pfn(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *pfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned int domid,
bool no_translate,
struct page **pages)
{
int err = 0;
struct remap_data rmd;
struct mmu_update mmu_update[REMAP_BATCH_SIZE];
unsigned long range;
int mapped = 0;
BUG_ON(!((vma->vm_flags & (VM_PFNMAP | VM_IO)) == (VM_PFNMAP | VM_IO)));
rmd.pfn = pfn;
rmd.prot = prot;
/*
* We use the err_ptr to indicate if there we are doing a contiguous
* mapping or a discontigious mapping.
*/
rmd.contiguous = !err_ptr;
rmd.no_translate = no_translate;
while (nr) {
int index = 0;
int done = 0;
int batch = min(REMAP_BATCH_SIZE, nr);
int batch_left = batch;
range = (unsigned long)batch << PAGE_SHIFT;
rmd.mmu_update = mmu_update;
err = apply_to_page_range(vma->vm_mm, addr, range,
remap_area_pfn_pte_fn, &rmd);
if (err)
goto out;
/* We record the error for each page that gives an error, but
* continue mapping until the whole set is done */
do {
int i;
err = HYPERVISOR_mmu_update(&mmu_update[index],
batch_left, &done, domid);
/*
* @err_ptr may be the same buffer as @gfn, so
* only clear it after each chunk of @gfn is
* used.
*/
if (err_ptr) {
for (i = index; i < index + done; i++)
err_ptr[i] = 0;
}
if (err < 0) {
if (!err_ptr)
goto out;
err_ptr[i] = err;
done++; /* Skip failed frame. */
} else
mapped += done;
batch_left -= done;
index += done;
} while (batch_left);
nr -= batch;
addr += range;
if (err_ptr)
err_ptr += batch;
cond_resched();
}
out:
xen_flush_tlb_all();
return err < 0 ? err : mapped;
}
int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t gfn, int nr,
pgprot_t prot, unsigned domid,
struct page **pages)
{
if (xen_feature(XENFEAT_auto_translated_physmap))
return -EOPNOTSUPP;
return do_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false,
pages);
}
EXPORT_SYMBOL_GPL(xen_remap_domain_gfn_range);
int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *gfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned domid, struct page **pages)
{
if (xen_feature(XENFEAT_auto_translated_physmap))
return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
prot, domid, pages);
/* We BUG_ON because it's a programmer error to pass a NULL err_ptr,
* and the consequences later is quite hard to detect what the actual
* cause of "wrong memory was mapped in".
*/
BUG_ON(err_ptr == NULL);
return do_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid,
false, pages);
}
EXPORT_SYMBOL_GPL(xen_remap_domain_gfn_array);
int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *mfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned int domid, struct page **pages)
{
if (xen_feature(XENFEAT_auto_translated_physmap))
return -EOPNOTSUPP;
return do_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid,
true, pages);
}
EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_array);
/* Returns: 0 success */
int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
int nr, struct page **pages)
......
arch/x86/xen/mmu_hvm.c
View file @ f682a792
......@@ -73,7 +73,7 @@ static int is_pagetable_dying_supported(void)
void __init xen_hvm_init_mmu_ops(void)
{
if (is_pagetable_dying_supported())
pv_mmu_ops.exit_mmap = xen_hvm_exit_mmap;
pv_ops.mmu.exit_mmap = xen_hvm_exit_mmap;
#ifdef CONFIG_PROC_VMCORE
WARN_ON(register_oldmem_pfn_is_ram(&xen_oldmem_pfn_is_ram));
#endif
......
arch/x86/xen/mmu_pv.c
View file @ f682a792
// SPDX-License-Identifier: GPL-2.0
/*
* Xen mmu operations
*
......@@ -98,6 +100,12 @@ static RESERVE_BRK_ARRAY(pte_t, level1_ident_pgt, LEVEL1_IDENT_ENTRIES);
static pud_t level3_user_vsyscall[PTRS_PER_PUD] __page_aligned_bss;
#endif /* CONFIG_X86_64 */
/*
* Protects atomic reservation decrease/increase against concurrent increases.
* Also protects non-atomic updates of current_pages and balloon lists.
*/
static DEFINE_SPINLOCK(xen_reservation_lock);
/*
* Note about cr3 (pagetable base) values:
*
......@@ -2209,7 +2217,7 @@ static void __init xen_write_cr3_init(unsigned long cr3)
set_page_prot(initial_page_table, PAGE_KERNEL);
set_page_prot(initial_kernel_pmd, PAGE_KERNEL);
pv_mmu_ops.write_cr3 = &xen_write_cr3;
pv_ops.mmu.write_cr3 = &xen_write_cr3;
}
/*
......@@ -2358,27 +2366,27 @@ static void xen_set_fixmap(unsigned idx, phys_addr_t phys, pgprot_t prot)
static void __init xen_post_allocator_init(void)
{
pv_mmu_ops.set_pte = xen_set_pte;
pv_mmu_ops.set_pmd = xen_set_pmd;
pv_mmu_ops.set_pud = xen_set_pud;
pv_ops.mmu.set_pte = xen_set_pte;
pv_ops.mmu.set_pmd = xen_set_pmd;
pv_ops.mmu.set_pud = xen_set_pud;
#ifdef CONFIG_X86_64
pv_mmu_ops.set_p4d = xen_set_p4d;
pv_ops.mmu.set_p4d = xen_set_p4d;
#endif
/* This will work as long as patching hasn't happened yet
(which it hasn't) */
pv_mmu_ops.alloc_pte = xen_alloc_pte;
pv_mmu_ops.alloc_pmd = xen_alloc_pmd;
pv_mmu_ops.release_pte = xen_release_pte;
pv_mmu_ops.release_pmd = xen_release_pmd;
pv_ops.mmu.alloc_pte = xen_alloc_pte;
pv_ops.mmu.alloc_pmd = xen_alloc_pmd;
pv_ops.mmu.release_pte = xen_release_pte;
pv_ops.mmu.release_pmd = xen_release_pmd;
#ifdef CONFIG_X86_64
pv_mmu_ops.alloc_pud = xen_alloc_pud;
pv_mmu_ops.release_pud = xen_release_pud;
pv_ops.mmu.alloc_pud = xen_alloc_pud;
pv_ops.mmu.release_pud = xen_release_pud;
#endif
pv_mmu_ops.make_pte = PV_CALLEE_SAVE(xen_make_pte);
pv_ops.mmu.make_pte = PV_CALLEE_SAVE(xen_make_pte);
#ifdef CONFIG_X86_64
pv_mmu_ops.write_cr3 = &xen_write_cr3;
pv_ops.mmu.write_cr3 = &xen_write_cr3;
#endif
}
......@@ -2466,7 +2474,7 @@ void __init xen_init_mmu_ops(void)
x86_init.paging.pagetable_init = xen_pagetable_init;
x86_init.hyper.init_after_bootmem = xen_after_bootmem;
pv_mmu_ops = xen_mmu_ops;
pv_ops.mmu = xen_mmu_ops;
memset(dummy_mapping, 0xff, PAGE_SIZE);
}
......@@ -2666,6 +2674,138 @@ void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order)
}
EXPORT_SYMBOL_GPL(xen_destroy_contiguous_region);
static noinline void xen_flush_tlb_all(void)
{
struct mmuext_op *op;
struct multicall_space mcs;
preempt_disable();
mcs = xen_mc_entry(sizeof(*op));
op = mcs.args;
op->cmd = MMUEXT_TLB_FLUSH_ALL;
MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);
xen_mc_issue(PARAVIRT_LAZY_MMU);
preempt_enable();
}
#define REMAP_BATCH_SIZE 16
struct remap_data {
xen_pfn_t *pfn;
bool contiguous;
bool no_translate;
pgprot_t prot;
struct mmu_update *mmu_update;
};
static int remap_area_pfn_pte_fn(pte_t *ptep, pgtable_t token,
unsigned long addr, void *data)
{
struct remap_data *rmd = data;
pte_t pte = pte_mkspecial(mfn_pte(*rmd->pfn, rmd->prot));
/*
* If we have a contiguous range, just update the pfn itself,
* else update pointer to be "next pfn".
*/
if (rmd->contiguous)
(*rmd->pfn)++;
else
rmd->pfn++;
rmd->mmu_update->ptr = virt_to_machine(ptep).maddr;
rmd->mmu_update->ptr |= rmd->no_translate ?
MMU_PT_UPDATE_NO_TRANSLATE :
MMU_NORMAL_PT_UPDATE;
rmd->mmu_update->val = pte_val_ma(pte);
rmd->mmu_update++;
return 0;
}
int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot,
unsigned int domid, bool no_translate, struct page **pages)
{
int err = 0;
struct remap_data rmd;
struct mmu_update mmu_update[REMAP_BATCH_SIZE];
unsigned long range;
int mapped = 0;
BUG_ON(!((vma->vm_flags & (VM_PFNMAP | VM_IO)) == (VM_PFNMAP | VM_IO)));
rmd.pfn = pfn;
rmd.prot = prot;
/*
* We use the err_ptr to indicate if there we are doing a contiguous
* mapping or a discontigious mapping.
*/
rmd.contiguous = !err_ptr;
rmd.no_translate = no_translate;
while (nr) {
int index = 0;
int done = 0;
int batch = min(REMAP_BATCH_SIZE, nr);
int batch_left = batch;
range = (unsigned long)batch << PAGE_SHIFT;
rmd.mmu_update = mmu_update;
err = apply_to_page_range(vma->vm_mm, addr, range,
remap_area_pfn_pte_fn, &rmd);
if (err)
goto out;
/*
* We record the error for each page that gives an error, but
* continue mapping until the whole set is done
*/
do {
int i;
err = HYPERVISOR_mmu_update(&mmu_update[index],
batch_left, &done, domid);
/*
* @err_ptr may be the same buffer as @gfn, so
* only clear it after each chunk of @gfn is
* used.
*/
if (err_ptr) {
for (i = index; i < index + done; i++)
err_ptr[i] = 0;
}
if (err < 0) {
if (!err_ptr)
goto out;
err_ptr[i] = err;
done++; /* Skip failed frame. */
} else
mapped += done;
batch_left -= done;
index += done;
} while (batch_left);
nr -= batch;
addr += range;
if (err_ptr)
err_ptr += batch;
cond_resched();
}
out:
xen_flush_tlb_all();
return err < 0 ? err : mapped;
}
EXPORT_SYMBOL_GPL(xen_remap_pfn);
#ifdef CONFIG_KEXEC_CORE
phys_addr_t paddr_vmcoreinfo_note(void)
{
......
arch/x86/xen/p2m.c
View file @ f682a792
// SPDX-License-Identifier: GPL-2.0
/*
* Xen leaves the responsibility for maintaining p2m mappings to the
* guests themselves, but it must also access and update the p2m array
......
arch/x86/xen/pci-swiotlb-xen.c
View file @ f682a792
// SPDX-License-Identifier: GPL-2.0
/* Glue code to lib/swiotlb-xen.c */
#include <linux/dma-mapping.h>
......
arch/x86/xen/platform-pci-unplug.c
View file @ f682a792
// SPDX-License-Identifier: GPL-2.0
/******************************************************************************
* platform-pci-unplug.c
*
* Xen platform PCI device driver
* Copyright (c) 2010, Citrix
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*
*/
#include <linux/init.h>
......@@ -31,7 +19,6 @@
#define XEN_PLATFORM_ERR_PROTOCOL -2
#define XEN_PLATFORM_ERR_BLACKLIST -3
#ifdef CONFIG_XEN_PVHVM
/* store the value of xen_emul_unplug after the unplug is done */
static int xen_platform_pci_unplug;
static int xen_emul_unplug;
......@@ -215,4 +202,3 @@ static int __init parse_xen_emul_unplug(char *arg)
return 0;
}
early_param("xen_emul_unplug", parse_xen_emul_unplug);
#endif
arch/x86/xen/spinlock.c
View file @ f682a792
......@@ -141,11 +141,12 @@ void __init xen_init_spinlocks(void)
printk(KERN_DEBUG "xen: PV spinlocks enabled\n");
__pv_init_lock_hash();
pv_lock_ops.queued_spin_lock_slowpath = __pv_queued_spin_lock_slowpath;
pv_lock_ops.queued_spin_unlock = PV_CALLEE_SAVE(__pv_queued_spin_unlock);
pv_lock_ops.wait = xen_qlock_wait;
pv_lock_ops.kick = xen_qlock_kick;
pv_lock_ops.vcpu_is_preempted = PV_CALLEE_SAVE(xen_vcpu_stolen);
pv_ops.lock.queued_spin_lock_slowpath = __pv_queued_spin_lock_slowpath;
pv_ops.lock.queued_spin_unlock =
PV_CALLEE_SAVE(__pv_queued_spin_unlock);
pv_ops.lock.wait = xen_qlock_wait;
pv_ops.lock.kick = xen_qlock_kick;
pv_ops.lock.vcpu_is_preempted = PV_CALLEE_SAVE(xen_vcpu_stolen);
}
static __init int xen_parse_nopvspin(char *arg)
......
arch/x86/xen/time.c
View file @ f682a792
......@@ -513,7 +513,7 @@ static void __init xen_time_init(void)
void __init xen_init_time_ops(void)
{
xen_sched_clock_offset = xen_clocksource_read();
pv_time_ops = xen_time_ops;
pv_ops.time = xen_time_ops;
x86_init.timers.timer_init = xen_time_init;
x86_init.timers.setup_percpu_clockev = x86_init_noop;
......@@ -555,7 +555,7 @@ void __init xen_hvm_init_time_ops(void)
}
xen_sched_clock_offset = xen_clocksource_read();
pv_time_ops = xen_time_ops;
pv_ops.time = xen_time_ops;
x86_init.timers.setup_percpu_clockev = xen_time_init;
x86_cpuinit.setup_percpu_clockev = xen_hvm_setup_cpu_clockevents;
......
arch/x86/xen/vdso.h
View file @ f682a792
/* SPDX-License-Identifier: GPL-2.0 */
/* Bit used for the pseudo-hwcap for non-negative segments. We use
bit 1 to avoid bugs in some versions of glibc when bit 0 is
used; the choice is otherwise arbitrary. */
......
arch/x86/xen/xen-pvh.S
View file @ f682a792
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright C 2016, Oracle and/or its affiliates. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
.code32
......
drivers/xen/time.c
View file @ f682a792
......@@ -175,7 +175,7 @@ void __init xen_time_setup_guest(void)
xen_runstate_remote = !HYPERVISOR_vm_assist(VMASST_CMD_enable,
VMASST_TYPE_runstate_update_flag);
pv_time_ops.steal_clock = xen_steal_clock;
pv_ops.time.steal_clock = xen_steal_clock;
static_key_slow_inc(&paravirt_steal_enabled);
if (xen_runstate_remote)
......
include/xen/events.h
View file @ f682a792
......@@ -89,11 +89,13 @@ unsigned irq_from_evtchn(unsigned int evtchn);
int irq_from_virq(unsigned int cpu, unsigned int virq);
unsigned int evtchn_from_irq(unsigned irq);
#ifdef CONFIG_XEN_PVHVM
/* Xen HVM evtchn vector callback */
void xen_hvm_callback_vector(void);
#ifdef CONFIG_TRACING
#define trace_xen_hvm_callback_vector xen_hvm_callback_vector
#endif
#endif
int xen_set_callback_via(uint64_t via);
void xen_evtchn_do_upcall(struct pt_regs *regs);
void xen_hvm_evtchn_do_upcall(void);
......
include/xen/interface/memory.h
View file @ f682a792
......@@ -244,12 +244,6 @@ DEFINE_GUEST_HANDLE_STRUCT(xen_memory_map);
#define XENMEM_machine_memory_map 10
/*
* Prevent the balloon driver from changing the memory reservation
* during a driver critical region.
*/
extern spinlock_t xen_reservation_lock;
/*
* Unmaps the page appearing at a particular GPFN from the specified guest's
* pseudophysical address space.
......
include/xen/xen-ops.h
View file @ f682a792
......@@ -5,6 +5,7 @@
#include <linux/percpu.h>
#include <linux/notifier.h>
#include <linux/efi.h>
#include <xen/features.h>
#include <asm/xen/interface.h>
#include <xen/interface/vcpu.h>
......@@ -47,6 +48,10 @@ int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
dma_addr_t *dma_handle);
void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot,
unsigned int domid, bool no_translate, struct page **pages);
#else
static inline int xen_create_contiguous_region(phys_addr_t pstart,
unsigned int order,
......@@ -58,10 +63,50 @@ static inline int xen_create_contiguous_region(phys_addr_t pstart,
static inline void xen_destroy_contiguous_region(phys_addr_t pstart,
unsigned int order) { }
static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
xen_pfn_t *pfn, int nr, int *err_ptr,
pgprot_t prot, unsigned int domid,
bool no_translate, struct page **pages)
{
BUG();
return 0;
}
#endif
struct vm_area_struct;
#ifdef CONFIG_XEN_AUTO_XLATE
int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *gfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned int domid,
struct page **pages);
int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
int nr, struct page **pages);
#else
/*
* These two functions are called from arch/x86/xen/mmu.c and so stubs
* are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE.
*/
static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *gfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned int domid,
struct page **pages)
{
return -EOPNOTSUPP;
}
static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
int nr, struct page **pages)
{
return -EOPNOTSUPP;
}
#endif
/*
* xen_remap_domain_gfn_array() - map an array of foreign frames by gfn
* @vma: VMA to map the pages into
......@@ -79,12 +124,25 @@ struct vm_area_struct;
* Returns the number of successfully mapped frames, or a -ve error
* code.
*/
int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *gfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned domid,
struct page **pages);
static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *gfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned int domid,
struct page **pages)
{
if (xen_feature(XENFEAT_auto_translated_physmap))
return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
prot, domid, pages);
/* We BUG_ON because it's a programmer error to pass a NULL err_ptr,
* and the consequences later is quite hard to detect what the actual
* cause of "wrong memory was mapped in".
*/
BUG_ON(err_ptr == NULL);
return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid,
false, pages);
}
/*
* xen_remap_domain_mfn_array() - map an array of foreign frames by mfn
......@@ -103,10 +161,18 @@ int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
* Returns the number of successfully mapped frames, or a -ve error
* code.
*/
int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
unsigned long addr, xen_pfn_t *mfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned int domid, struct page **pages);
static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
unsigned long addr, xen_pfn_t *mfn,
int nr, int *err_ptr,
pgprot_t prot, unsigned int domid,
struct page **pages)
{
if (xen_feature(XENFEAT_auto_translated_physmap))
return -EOPNOTSUPP;
return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid,
true, pages);
}
/* xen_remap_domain_gfn_range() - map a range of foreign frames
* @vma: VMA to map the pages into
......@@ -120,44 +186,21 @@ int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
* Returns the number of successfully mapped frames, or a -ve error
* code.
*/
int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t gfn, int nr,
pgprot_t prot, unsigned domid,
struct page **pages);
int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
int numpgs, struct page **pages);
#ifdef CONFIG_XEN_AUTO_XLATE
int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *gfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned domid,
struct page **pages);
int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
int nr, struct page **pages);
#else
/*
* These two functions are called from arch/x86/xen/mmu.c and so stubs
* are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE.
*/
static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *gfn, int nr,
int *err_ptr, pgprot_t prot,
unsigned int domid,
struct page **pages)
static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t gfn, int nr,
pgprot_t prot, unsigned int domid,
struct page **pages)
{
return -EOPNOTSUPP;
}
if (xen_feature(XENFEAT_auto_translated_physmap))
return -EOPNOTSUPP;
static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
int nr, struct page **pages)
{
return -EOPNOTSUPP;
return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false,
pages);
}
#endif
int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
int numpgs, struct page **pages);
int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
unsigned long nr_grant_frames);
......
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