[thirdparty/linux.git] / arch / x86 / kvm / vmx / evmcs.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __KVM_X86_VMX_EVMCS_H
#define __KVM_X86_VMX_EVMCS_H

#include <linux/jump_label.h>

#include <asm/hyperv-tlfs.h>
#include <asm/mshyperv.h>
#include <asm/vmx.h>

#include "capabilities.h"
#include "vmcs.h"

struct vmcs_config;

DECLARE_STATIC_KEY_FALSE(enable_evmcs);

#define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs))

#define KVM_EVMCS_VERSION 1

/*
 * Enlightened VMCSv1 doesn't support these:
 *
 *	POSTED_INTR_NV                  = 0x00000002,
 *	GUEST_INTR_STATUS               = 0x00000810,
 *	APIC_ACCESS_ADDR		= 0x00002014,
 *	POSTED_INTR_DESC_ADDR           = 0x00002016,
 *	EOI_EXIT_BITMAP0                = 0x0000201c,
 *	EOI_EXIT_BITMAP1                = 0x0000201e,
 *	EOI_EXIT_BITMAP2                = 0x00002020,
 *	EOI_EXIT_BITMAP3                = 0x00002022,
 *	GUEST_PML_INDEX			= 0x00000812,
 *	PML_ADDRESS			= 0x0000200e,
 *	VM_FUNCTION_CONTROL             = 0x00002018,
 *	EPTP_LIST_ADDRESS               = 0x00002024,
 *	VMREAD_BITMAP                   = 0x00002026,
 *	VMWRITE_BITMAP                  = 0x00002028,
 *
 *	TSC_MULTIPLIER                  = 0x00002032,
 *	PLE_GAP                         = 0x00004020,
 *	PLE_WINDOW                      = 0x00004022,
 *	VMX_PREEMPTION_TIMER_VALUE      = 0x0000482E,
 *      GUEST_IA32_PERF_GLOBAL_CTRL     = 0x00002808,
 *      HOST_IA32_PERF_GLOBAL_CTRL      = 0x00002c04,
 *
 * Currently unsupported in KVM:
 *	GUEST_IA32_RTIT_CTL		= 0x00002814,
 */
#define EVMCS1_UNSUPPORTED_PINCTRL (PIN_BASED_POSTED_INTR | \
				    PIN_BASED_VMX_PREEMPTION_TIMER)
#define EVMCS1_UNSUPPORTED_2NDEXEC					\
	(SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY |				\
	 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |			\
	 SECONDARY_EXEC_APIC_REGISTER_VIRT |				\
	 SECONDARY_EXEC_ENABLE_PML |					\
	 SECONDARY_EXEC_ENABLE_VMFUNC |					\
	 SECONDARY_EXEC_SHADOW_VMCS |					\
	 SECONDARY_EXEC_TSC_SCALING |					\
	 SECONDARY_EXEC_PAUSE_LOOP_EXITING)
#define EVMCS1_UNSUPPORTED_VMEXIT_CTRL (VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL)
#define EVMCS1_UNSUPPORTED_VMENTRY_CTRL (VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL)
#define EVMCS1_UNSUPPORTED_VMFUNC (VMX_VMFUNC_EPTP_SWITCHING)

#if IS_ENABLED(CONFIG_HYPERV)

struct evmcs_field {
	u16 offset;
	u16 clean_field;
};

extern const struct evmcs_field vmcs_field_to_evmcs_1[];
extern const unsigned int nr_evmcs_1_fields;

#define ROL16(val, n) ((u16)(((u16)(val) << (n)) | ((u16)(val) >> (16 - (n)))))

static __always_inline int get_evmcs_offset(unsigned long field,
					    u16 *clean_field)
{
	unsigned int index = ROL16(field, 6);
	const struct evmcs_field *evmcs_field;

	if (unlikely(index >= nr_evmcs_1_fields)) {
		WARN_ONCE(1, "KVM: accessing unsupported EVMCS field %lx\n",
			  field);
		return -ENOENT;
	}

	evmcs_field = &vmcs_field_to_evmcs_1[index];

	if (clean_field)
		*clean_field = evmcs_field->clean_field;

	return evmcs_field->offset;
}

#undef ROL16

static inline void evmcs_write64(unsigned long field, u64 value)
{
	u16 clean_field;
	int offset = get_evmcs_offset(field, &clean_field);

	if (offset < 0)
		return;

	*(u64 *)((char *)current_evmcs + offset) = value;

	current_evmcs->hv_clean_fields &= ~clean_field;
}

static inline void evmcs_write32(unsigned long field, u32 value)
{
	u16 clean_field;
	int offset = get_evmcs_offset(field, &clean_field);

	if (offset < 0)
		return;

	*(u32 *)((char *)current_evmcs + offset) = value;
	current_evmcs->hv_clean_fields &= ~clean_field;
}

static inline void evmcs_write16(unsigned long field, u16 value)
{
	u16 clean_field;
	int offset = get_evmcs_offset(field, &clean_field);

	if (offset < 0)
		return;

	*(u16 *)((char *)current_evmcs + offset) = value;
	current_evmcs->hv_clean_fields &= ~clean_field;
}

static inline u64 evmcs_read64(unsigned long field)
{
	int offset = get_evmcs_offset(field, NULL);

	if (offset < 0)
		return 0;

	return *(u64 *)((char *)current_evmcs + offset);
}

static inline u32 evmcs_read32(unsigned long field)
{
	int offset = get_evmcs_offset(field, NULL);

	if (offset < 0)
		return 0;

	return *(u32 *)((char *)current_evmcs + offset);
}

static inline u16 evmcs_read16(unsigned long field)
{
	int offset = get_evmcs_offset(field, NULL);

	if (offset < 0)
		return 0;

	return *(u16 *)((char *)current_evmcs + offset);
}

static inline void evmcs_touch_msr_bitmap(void)
{
	if (unlikely(!current_evmcs))
		return;

	if (current_evmcs->hv_enlightenments_control.msr_bitmap)
		current_evmcs->hv_clean_fields &=
			~HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP;
}

static inline void evmcs_load(u64 phys_addr)
{
	struct hv_vp_assist_page *vp_ap =
		hv_get_vp_assist_page(smp_processor_id());

	vp_ap->current_nested_vmcs = phys_addr;
	vp_ap->enlighten_vmentry = 1;
}

void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf);
#else /* !IS_ENABLED(CONFIG_HYPERV) */
static inline void evmcs_write64(unsigned long field, u64 value) {}
static inline void evmcs_write32(unsigned long field, u32 value) {}
static inline void evmcs_write16(unsigned long field, u16 value) {}
static inline u64 evmcs_read64(unsigned long field) { return 0; }
static inline u32 evmcs_read32(unsigned long field) { return 0; }
static inline u16 evmcs_read16(unsigned long field) { return 0; }
static inline void evmcs_load(u64 phys_addr) {}
static inline void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf) {}
static inline void evmcs_touch_msr_bitmap(void) {}
#endif /* IS_ENABLED(CONFIG_HYPERV) */

int nested_enable_evmcs(struct kvm_vcpu *vcpu,
			uint16_t *vmcs_version);

#endif /* __KVM_X86_VMX_EVMCS_H */
Commit	Line	Data
773e8a04 VK	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef __KVM_X86_VMX_EVMCS_H
	3	#define __KVM_X86_VMX_EVMCS_H
	4
75edce8a	5	#include <linux/jump_label.h>
773e8a04	6
75edce8a SC	7	#include <asm/hyperv-tlfs.h>
	8	#include <asm/mshyperv.h>
	9	#include <asm/vmx.h>
	10
	11	#include "capabilities.h"
	12	#include "vmcs.h"
	13
	14	struct vmcs_config;
	15
	16	DECLARE_STATIC_KEY_FALSE(enable_evmcs);
	17
	18	#define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs))
	19
	20	#define KVM_EVMCS_VERSION 1
	21
	22	/*
	23	* Enlightened VMCSv1 doesn't support these:
	24	*
	25	* POSTED_INTR_NV = 0x00000002,
	26	* GUEST_INTR_STATUS = 0x00000810,
	27	* APIC_ACCESS_ADDR = 0x00002014,
	28	* POSTED_INTR_DESC_ADDR = 0x00002016,
	29	* EOI_EXIT_BITMAP0 = 0x0000201c,
	30	* EOI_EXIT_BITMAP1 = 0x0000201e,
	31	* EOI_EXIT_BITMAP2 = 0x00002020,
	32	* EOI_EXIT_BITMAP3 = 0x00002022,
	33	* GUEST_PML_INDEX = 0x00000812,
	34	* PML_ADDRESS = 0x0000200e,
	35	* VM_FUNCTION_CONTROL = 0x00002018,
	36	* EPTP_LIST_ADDRESS = 0x00002024,
	37	* VMREAD_BITMAP = 0x00002026,
	38	* VMWRITE_BITMAP = 0x00002028,
	39	*
	40	* TSC_MULTIPLIER = 0x00002032,
	41	* PLE_GAP = 0x00004020,
	42	* PLE_WINDOW = 0x00004022,
	43	* VMX_PREEMPTION_TIMER_VALUE = 0x0000482E,
	44	* GUEST_IA32_PERF_GLOBAL_CTRL = 0x00002808,
	45	* HOST_IA32_PERF_GLOBAL_CTRL = 0x00002c04,
	46	*
	47	* Currently unsupported in KVM:
	48	* GUEST_IA32_RTIT_CTL = 0x00002814,
	49	*/
	50	#define EVMCS1_UNSUPPORTED_PINCTRL (PIN_BASED_POSTED_INTR \| \
	51	PIN_BASED_VMX_PREEMPTION_TIMER)
	52	#define EVMCS1_UNSUPPORTED_2NDEXEC \
	53	(SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY \| \
	54	SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES \| \
	55	SECONDARY_EXEC_APIC_REGISTER_VIRT \| \
	56	SECONDARY_EXEC_ENABLE_PML \| \
	57	SECONDARY_EXEC_ENABLE_VMFUNC \| \
	58	SECONDARY_EXEC_SHADOW_VMCS \| \
	59	SECONDARY_EXEC_TSC_SCALING \| \
	60	SECONDARY_EXEC_PAUSE_LOOP_EXITING)
	61	#define EVMCS1_UNSUPPORTED_VMEXIT_CTRL (VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL)
	62	#define EVMCS1_UNSUPPORTED_VMENTRY_CTRL (VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL)
	63	#define EVMCS1_UNSUPPORTED_VMFUNC (VMX_VMFUNC_EPTP_SWITCHING)
	64
	65	#if IS_ENABLED(CONFIG_HYPERV)
773e8a04 VK	66
	67	struct evmcs_field {
	68	u16 offset;
	69	u16 clean_field;
	70	};
	71
75edce8a SC	72	extern const struct evmcs_field vmcs_field_to_evmcs_1[];
	73	extern const unsigned int nr_evmcs_1_fields;
	74
	75	#define ROL16(val, n) ((u16)(((u16)(val) << (n)) \| ((u16)(val) >> (16 - (n)))))
773e8a04 VK	76
	77	static __always_inline int get_evmcs_offset(unsigned long field,
	78	u16 *clean_field)
	79	{
	80	unsigned int index = ROL16(field, 6);
	81	const struct evmcs_field *evmcs_field;
	82
75edce8a	83	if (unlikely(index >= nr_evmcs_1_fields)) {
773e8a04 VK	84	WARN_ONCE(1, "KVM: accessing unsupported EVMCS field %lx\n",
	85	field);
	86	return -ENOENT;
	87	}
	88
	89	evmcs_field = &vmcs_field_to_evmcs_1[index];
	90
	91	if (clean_field)
	92	*clean_field = evmcs_field->clean_field;
	93
	94	return evmcs_field->offset;
	95	}
	96
	97	#undef ROL16
	98
75edce8a SC	99	static inline void evmcs_write64(unsigned long field, u64 value)
	100	{
	101	u16 clean_field;
	102	int offset = get_evmcs_offset(field, &clean_field);
	103
	104	if (offset < 0)
	105	return;
	106
	107	(u64 )((char *)current_evmcs + offset) = value;
	108
	109	current_evmcs->hv_clean_fields &= ~clean_field;
	110	}
	111
	112	static inline void evmcs_write32(unsigned long field, u32 value)
	113	{
	114	u16 clean_field;
	115	int offset = get_evmcs_offset(field, &clean_field);
	116
	117	if (offset < 0)
	118	return;
	119
	120	(u32 )((char *)current_evmcs + offset) = value;
	121	current_evmcs->hv_clean_fields &= ~clean_field;
	122	}
	123
	124	static inline void evmcs_write16(unsigned long field, u16 value)
	125	{
	126	u16 clean_field;
	127	int offset = get_evmcs_offset(field, &clean_field);
	128
	129	if (offset < 0)
	130	return;
	131
	132	(u16 )((char *)current_evmcs + offset) = value;
	133	current_evmcs->hv_clean_fields &= ~clean_field;
	134	}
	135
	136	static inline u64 evmcs_read64(unsigned long field)
	137	{
	138	int offset = get_evmcs_offset(field, NULL);
	139
	140	if (offset < 0)
	141	return 0;
	142
	143	return (u64 )((char *)current_evmcs + offset);
	144	}
	145
	146	static inline u32 evmcs_read32(unsigned long field)
	147	{
	148	int offset = get_evmcs_offset(field, NULL);
	149
	150	if (offset < 0)
	151	return 0;
	152
	153	return (u32 )((char *)current_evmcs + offset);
	154	}
	155
	156	static inline u16 evmcs_read16(unsigned long field)
	157	{
	158	int offset = get_evmcs_offset(field, NULL);
	159
	160	if (offset < 0)
	161	return 0;
	162
163	return (u16 )((char *)current_evmcs + offset);
164	}
165
166	static inline void evmcs_touch_msr_bitmap(void)
167	{
168	if (unlikely(!current_evmcs))
169	return;
170
171	if (current_evmcs->hv_enlightenments_control.msr_bitmap)
172	current_evmcs->hv_clean_fields &=
173	~HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP;
174	}
175
176	static inline void evmcs_load(u64 phys_addr)
177	{
178	struct hv_vp_assist_page *vp_ap =
179	hv_get_vp_assist_page(smp_processor_id());
180
181	vp_ap->current_nested_vmcs = phys_addr;
182	vp_ap->enlighten_vmentry = 1;
183	}
184
185	void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf);
186	#else /* !IS_ENABLED(CONFIG_HYPERV) */
187	static inline void evmcs_write64(unsigned long field, u64 value) {}
188	static inline void evmcs_write32(unsigned long field, u32 value) {}
189	static inline void evmcs_write16(unsigned long field, u16 value) {}
190	static inline u64 evmcs_read64(unsigned long field) { return 0; }
191	static inline u32 evmcs_read32(unsigned long field) { return 0; }
192	static inline u16 evmcs_read16(unsigned long field) { return 0; }
193	static inline void evmcs_load(u64 phys_addr) {}
194	static inline void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf) {}
195	static inline void evmcs_touch_msr_bitmap(void) {}
196	#endif /* IS_ENABLED(CONFIG_HYPERV) */
197
198	int nested_enable_evmcs(struct kvm_vcpu *vcpu,
199	uint16_t *vmcs_version);
200
773e8a04	201	#endif /* __KVM_X86_VMX_EVMCS_H */