mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 13:15:18 +07:00
fa36dcdf8b
Hyper-V assumes page size to be 4K. While this assumption holds true on x86 architecture, it might not be true for ARM64 architecture. Hence define hyper-v specific function to allocate a zeroed page which can have a different implementation on ARM64 architecture to handle the conflict between hyper-v's assumed page size and actual guest page size. Signed-off-by: Himadri Pandya <himadri18.07@gmail.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
267 lines
7.6 KiB
C
267 lines
7.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_MSHYPER_H
|
|
#define _ASM_X86_MSHYPER_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/nmi.h>
|
|
#include <asm/io.h>
|
|
#include <asm/hyperv-tlfs.h>
|
|
#include <asm/nospec-branch.h>
|
|
|
|
typedef int (*hyperv_fill_flush_list_func)(
|
|
struct hv_guest_mapping_flush_list *flush,
|
|
void *data);
|
|
|
|
#define hv_init_timer(timer, tick) \
|
|
wrmsrl(HV_X64_MSR_STIMER0_COUNT + (2*timer), tick)
|
|
#define hv_init_timer_config(timer, val) \
|
|
wrmsrl(HV_X64_MSR_STIMER0_CONFIG + (2*timer), val)
|
|
|
|
#define hv_get_simp(val) rdmsrl(HV_X64_MSR_SIMP, val)
|
|
#define hv_set_simp(val) wrmsrl(HV_X64_MSR_SIMP, val)
|
|
|
|
#define hv_get_siefp(val) rdmsrl(HV_X64_MSR_SIEFP, val)
|
|
#define hv_set_siefp(val) wrmsrl(HV_X64_MSR_SIEFP, val)
|
|
|
|
#define hv_get_synic_state(val) rdmsrl(HV_X64_MSR_SCONTROL, val)
|
|
#define hv_set_synic_state(val) wrmsrl(HV_X64_MSR_SCONTROL, val)
|
|
|
|
#define hv_get_vp_index(index) rdmsrl(HV_X64_MSR_VP_INDEX, index)
|
|
|
|
#define hv_signal_eom() wrmsrl(HV_X64_MSR_EOM, 0)
|
|
|
|
#define hv_get_synint_state(int_num, val) \
|
|
rdmsrl(HV_X64_MSR_SINT0 + int_num, val)
|
|
#define hv_set_synint_state(int_num, val) \
|
|
wrmsrl(HV_X64_MSR_SINT0 + int_num, val)
|
|
|
|
#define hv_get_crash_ctl(val) \
|
|
rdmsrl(HV_X64_MSR_CRASH_CTL, val)
|
|
|
|
#define hv_get_time_ref_count(val) \
|
|
rdmsrl(HV_X64_MSR_TIME_REF_COUNT, val)
|
|
|
|
#define hv_get_reference_tsc(val) \
|
|
rdmsrl(HV_X64_MSR_REFERENCE_TSC, val)
|
|
#define hv_set_reference_tsc(val) \
|
|
wrmsrl(HV_X64_MSR_REFERENCE_TSC, val)
|
|
#define hv_set_clocksource_vdso(val) \
|
|
((val).archdata.vclock_mode = VCLOCK_HVCLOCK)
|
|
#define hv_get_raw_timer() rdtsc_ordered()
|
|
|
|
void hyperv_callback_vector(void);
|
|
void hyperv_reenlightenment_vector(void);
|
|
#ifdef CONFIG_TRACING
|
|
#define trace_hyperv_callback_vector hyperv_callback_vector
|
|
#endif
|
|
void hyperv_vector_handler(struct pt_regs *regs);
|
|
|
|
/*
|
|
* Routines for stimer0 Direct Mode handling.
|
|
* On x86/x64, there are no percpu actions to take.
|
|
*/
|
|
void hv_stimer0_vector_handler(struct pt_regs *regs);
|
|
void hv_stimer0_callback_vector(void);
|
|
|
|
static inline void hv_enable_stimer0_percpu_irq(int irq) {}
|
|
static inline void hv_disable_stimer0_percpu_irq(int irq) {}
|
|
|
|
|
|
#if IS_ENABLED(CONFIG_HYPERV)
|
|
extern void *hv_hypercall_pg;
|
|
extern void __percpu **hyperv_pcpu_input_arg;
|
|
|
|
static inline u64 hv_do_hypercall(u64 control, void *input, void *output)
|
|
{
|
|
u64 input_address = input ? virt_to_phys(input) : 0;
|
|
u64 output_address = output ? virt_to_phys(output) : 0;
|
|
u64 hv_status;
|
|
|
|
#ifdef CONFIG_X86_64
|
|
if (!hv_hypercall_pg)
|
|
return U64_MAX;
|
|
|
|
__asm__ __volatile__("mov %4, %%r8\n"
|
|
CALL_NOSPEC
|
|
: "=a" (hv_status), ASM_CALL_CONSTRAINT,
|
|
"+c" (control), "+d" (input_address)
|
|
: "r" (output_address),
|
|
THUNK_TARGET(hv_hypercall_pg)
|
|
: "cc", "memory", "r8", "r9", "r10", "r11");
|
|
#else
|
|
u32 input_address_hi = upper_32_bits(input_address);
|
|
u32 input_address_lo = lower_32_bits(input_address);
|
|
u32 output_address_hi = upper_32_bits(output_address);
|
|
u32 output_address_lo = lower_32_bits(output_address);
|
|
|
|
if (!hv_hypercall_pg)
|
|
return U64_MAX;
|
|
|
|
__asm__ __volatile__(CALL_NOSPEC
|
|
: "=A" (hv_status),
|
|
"+c" (input_address_lo), ASM_CALL_CONSTRAINT
|
|
: "A" (control),
|
|
"b" (input_address_hi),
|
|
"D"(output_address_hi), "S"(output_address_lo),
|
|
THUNK_TARGET(hv_hypercall_pg)
|
|
: "cc", "memory");
|
|
#endif /* !x86_64 */
|
|
return hv_status;
|
|
}
|
|
|
|
/* Fast hypercall with 8 bytes of input and no output */
|
|
static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1)
|
|
{
|
|
u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT;
|
|
|
|
#ifdef CONFIG_X86_64
|
|
{
|
|
__asm__ __volatile__(CALL_NOSPEC
|
|
: "=a" (hv_status), ASM_CALL_CONSTRAINT,
|
|
"+c" (control), "+d" (input1)
|
|
: THUNK_TARGET(hv_hypercall_pg)
|
|
: "cc", "r8", "r9", "r10", "r11");
|
|
}
|
|
#else
|
|
{
|
|
u32 input1_hi = upper_32_bits(input1);
|
|
u32 input1_lo = lower_32_bits(input1);
|
|
|
|
__asm__ __volatile__ (CALL_NOSPEC
|
|
: "=A"(hv_status),
|
|
"+c"(input1_lo),
|
|
ASM_CALL_CONSTRAINT
|
|
: "A" (control),
|
|
"b" (input1_hi),
|
|
THUNK_TARGET(hv_hypercall_pg)
|
|
: "cc", "edi", "esi");
|
|
}
|
|
#endif
|
|
return hv_status;
|
|
}
|
|
|
|
/* Fast hypercall with 16 bytes of input */
|
|
static inline u64 hv_do_fast_hypercall16(u16 code, u64 input1, u64 input2)
|
|
{
|
|
u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT;
|
|
|
|
#ifdef CONFIG_X86_64
|
|
{
|
|
__asm__ __volatile__("mov %4, %%r8\n"
|
|
CALL_NOSPEC
|
|
: "=a" (hv_status), ASM_CALL_CONSTRAINT,
|
|
"+c" (control), "+d" (input1)
|
|
: "r" (input2),
|
|
THUNK_TARGET(hv_hypercall_pg)
|
|
: "cc", "r8", "r9", "r10", "r11");
|
|
}
|
|
#else
|
|
{
|
|
u32 input1_hi = upper_32_bits(input1);
|
|
u32 input1_lo = lower_32_bits(input1);
|
|
u32 input2_hi = upper_32_bits(input2);
|
|
u32 input2_lo = lower_32_bits(input2);
|
|
|
|
__asm__ __volatile__ (CALL_NOSPEC
|
|
: "=A"(hv_status),
|
|
"+c"(input1_lo), ASM_CALL_CONSTRAINT
|
|
: "A" (control), "b" (input1_hi),
|
|
"D"(input2_hi), "S"(input2_lo),
|
|
THUNK_TARGET(hv_hypercall_pg)
|
|
: "cc");
|
|
}
|
|
#endif
|
|
return hv_status;
|
|
}
|
|
|
|
/*
|
|
* Rep hypercalls. Callers of this functions are supposed to ensure that
|
|
* rep_count and varhead_size comply with Hyper-V hypercall definition.
|
|
*/
|
|
static inline u64 hv_do_rep_hypercall(u16 code, u16 rep_count, u16 varhead_size,
|
|
void *input, void *output)
|
|
{
|
|
u64 control = code;
|
|
u64 status;
|
|
u16 rep_comp;
|
|
|
|
control |= (u64)varhead_size << HV_HYPERCALL_VARHEAD_OFFSET;
|
|
control |= (u64)rep_count << HV_HYPERCALL_REP_COMP_OFFSET;
|
|
|
|
do {
|
|
status = hv_do_hypercall(control, input, output);
|
|
if ((status & HV_HYPERCALL_RESULT_MASK) != HV_STATUS_SUCCESS)
|
|
return status;
|
|
|
|
/* Bits 32-43 of status have 'Reps completed' data. */
|
|
rep_comp = (status & HV_HYPERCALL_REP_COMP_MASK) >>
|
|
HV_HYPERCALL_REP_COMP_OFFSET;
|
|
|
|
control &= ~HV_HYPERCALL_REP_START_MASK;
|
|
control |= (u64)rep_comp << HV_HYPERCALL_REP_START_OFFSET;
|
|
|
|
touch_nmi_watchdog();
|
|
} while (rep_comp < rep_count);
|
|
|
|
return status;
|
|
}
|
|
|
|
extern struct hv_vp_assist_page **hv_vp_assist_page;
|
|
|
|
static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu)
|
|
{
|
|
if (!hv_vp_assist_page)
|
|
return NULL;
|
|
|
|
return hv_vp_assist_page[cpu];
|
|
}
|
|
|
|
void __init hyperv_init(void);
|
|
void hyperv_setup_mmu_ops(void);
|
|
void *hv_alloc_hyperv_page(void);
|
|
void *hv_alloc_hyperv_zeroed_page(void);
|
|
void hv_free_hyperv_page(unsigned long addr);
|
|
void hyperv_reenlightenment_intr(struct pt_regs *regs);
|
|
void set_hv_tscchange_cb(void (*cb)(void));
|
|
void clear_hv_tscchange_cb(void);
|
|
void hyperv_stop_tsc_emulation(void);
|
|
int hyperv_flush_guest_mapping(u64 as);
|
|
int hyperv_flush_guest_mapping_range(u64 as,
|
|
hyperv_fill_flush_list_func fill_func, void *data);
|
|
int hyperv_fill_flush_guest_mapping_list(
|
|
struct hv_guest_mapping_flush_list *flush,
|
|
u64 start_gfn, u64 end_gfn);
|
|
|
|
#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
|
|
|
|
#else /* CONFIG_HYPERV */
|
|
static inline void hyperv_init(void) {}
|
|
static inline void hyperv_setup_mmu_ops(void) {}
|
|
static inline void *hv_alloc_hyperv_page(void) { return NULL; }
|
|
static inline void hv_free_hyperv_page(unsigned long addr) {}
|
|
static inline void set_hv_tscchange_cb(void (*cb)(void)) {}
|
|
static inline void clear_hv_tscchange_cb(void) {}
|
|
static inline void hyperv_stop_tsc_emulation(void) {};
|
|
static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline int hyperv_flush_guest_mapping(u64 as) { return -1; }
|
|
static inline int hyperv_flush_guest_mapping_range(u64 as,
|
|
hyperv_fill_flush_list_func fill_func, void *data)
|
|
{
|
|
return -1;
|
|
}
|
|
#endif /* CONFIG_HYPERV */
|
|
|
|
|
|
#include <asm-generic/mshyperv.h>
|
|
|
|
#endif
|