summaryrefslogtreecommitdiffstats
path: root/arch/x86/include/asm/mshyperv.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/include/asm/mshyperv.h')
-rw-r--r--arch/x86/include/asm/mshyperv.h273
1 files changed, 273 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
new file mode 100644
index 000000000..871a8b06d
--- /dev/null
+++ b/arch/x86/include/asm/mshyperv.h
@@ -0,0 +1,273 @@
+/* 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 <linux/msi.h>
+#include <asm/io.h>
+#include <asm/hyperv-tlfs.h>
+#include <asm/nospec-branch.h>
+#include <asm/paravirt.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_recommend_using_aeoi() \
+ (!(ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED))
+
+#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).vdso_clock_mode = VDSO_CLOCKMODE_HVCLOCK)
+#define hv_enable_vdso_clocksource() \
+ vclocks_set_used(VDSO_CLOCKMODE_HVCLOCK);
+#define hv_get_raw_timer() rdtsc_ordered()
+#define hv_get_vector() HYPERVISOR_CALLBACK_VECTOR
+
+/*
+ * Reference to pv_ops must be inline so objtool
+ * detection of noinstr violations can work correctly.
+ */
+static __always_inline void hv_setup_sched_clock(void *sched_clock)
+{
+#ifdef CONFIG_PARAVIRT
+ pv_ops.time.sched_clock = sched_clock;
+#endif
+}
+
+void hyperv_vector_handler(struct pt_regs *regs);
+
+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 int hyperv_init_cpuhp;
+
+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 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
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 21:54:48 +0000