name : guest-state-buffer.h /* SPDX-License-Identifier: GPL-2.0 */ /* * Interface based on include/net/netlink.h */ #ifndef _ASM_POWERPC_GUEST_STATE_BUFFER_H #define _ASM_POWERPC_GUEST_STATE_BUFFER_H #include "asm/hvcall.h" #include <linux/gfp.h> #include <linux/bitmap.h> #include <asm/plpar_wrappers.h> /************************************************************************** * Guest State Buffer Constants **************************************************************************/ /* Element without a value and any length */ #define KVMPPC_GSID_BLANK 0x0000 /* Size required for the L0's internal VCPU representation */ #define KVMPPC_GSID_HOST_STATE_SIZE 0x0001 /* Minimum size for the H_GUEST_RUN_VCPU output buffer */ #define KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE 0x0002 /* "Logical" PVR value as defined in the PAPR */ #define KVMPPC_GSID_LOGICAL_PVR 0x0003 /* L0 relative timebase offset */ #define KVMPPC_GSID_TB_OFFSET 0x0004 /* Partition Scoped Page Table Info */ #define KVMPPC_GSID_PARTITION_TABLE 0x0005 /* Process Table Info */ #define KVMPPC_GSID_PROCESS_TABLE 0x0006 /* H_GUEST_RUN_VCPU input buffer Info */ #define KVMPPC_GSID_RUN_INPUT 0x0C00 /* H_GUEST_RUN_VCPU output buffer Info */ #define KVMPPC_GSID_RUN_OUTPUT 0x0C01 #define KVMPPC_GSID_VPA 0x0C02 #define KVMPPC_GSID_GPR(x) (0x1000 + (x)) #define KVMPPC_GSID_HDEC_EXPIRY_TB 0x1020 #define KVMPPC_GSID_NIA 0x1021 #define KVMPPC_GSID_MSR 0x1022 #define KVMPPC_GSID_LR 0x1023 #define KVMPPC_GSID_XER 0x1024 #define KVMPPC_GSID_CTR 0x1025 #define KVMPPC_GSID_CFAR 0x1026 #define KVMPPC_GSID_SRR0 0x1027 #define KVMPPC_GSID_SRR1 0x1028 #define KVMPPC_GSID_DAR 0x1029 #define KVMPPC_GSID_DEC_EXPIRY_TB 0x102A #define KVMPPC_GSID_VTB 0x102B #define KVMPPC_GSID_LPCR 0x102C #define KVMPPC_GSID_HFSCR 0x102D #define KVMPPC_GSID_FSCR 0x102E #define KVMPPC_GSID_FPSCR 0x102F #define KVMPPC_GSID_DAWR0 0x1030 #define KVMPPC_GSID_DAWR1 0x1031 #define KVMPPC_GSID_CIABR 0x1032 #define KVMPPC_GSID_PURR 0x1033 #define KVMPPC_GSID_SPURR 0x1034 #define KVMPPC_GSID_IC 0x1035 #define KVMPPC_GSID_SPRG0 0x1036 #define KVMPPC_GSID_SPRG1 0x1037 #define KVMPPC_GSID_SPRG2 0x1038 #define KVMPPC_GSID_SPRG3 0x1039 #define KVMPPC_GSID_PPR 0x103A #define KVMPPC_GSID_MMCR(x) (0x103B + (x)) #define KVMPPC_GSID_MMCRA 0x103F #define KVMPPC_GSID_SIER(x) (0x1040 + (x)) #define KVMPPC_GSID_BESCR 0x1043 #define KVMPPC_GSID_EBBHR 0x1044 #define KVMPPC_GSID_EBBRR 0x1045 #define KVMPPC_GSID_AMR 0x1046 #define KVMPPC_GSID_IAMR 0x1047 #define KVMPPC_GSID_AMOR 0x1048 #define KVMPPC_GSID_UAMOR 0x1049 #define KVMPPC_GSID_SDAR 0x104A #define KVMPPC_GSID_SIAR 0x104B #define KVMPPC_GSID_DSCR 0x104C #define KVMPPC_GSID_TAR 0x104D #define KVMPPC_GSID_DEXCR 0x104E #define KVMPPC_GSID_HDEXCR 0x104F #define KVMPPC_GSID_HASHKEYR 0x1050 #define KVMPPC_GSID_HASHPKEYR 0x1051 #define KVMPPC_GSID_CTRL 0x1052 #define KVMPPC_GSID_CR 0x2000 #define KVMPPC_GSID_PIDR 0x2001 #define KVMPPC_GSID_DSISR 0x2002 #define KVMPPC_GSID_VSCR 0x2003 #define KVMPPC_GSID_VRSAVE 0x2004 #define KVMPPC_GSID_DAWRX0 0x2005 #define KVMPPC_GSID_DAWRX1 0x2006 #define KVMPPC_GSID_PMC(x) (0x2007 + (x)) #define KVMPPC_GSID_WORT 0x200D #define KVMPPC_GSID_PSPB 0x200E #define KVMPPC_GSID_VSRS(x) (0x3000 + (x)) #define KVMPPC_GSID_HDAR 0xF000 #define KVMPPC_GSID_HDSISR 0xF001 #define KVMPPC_GSID_HEIR 0xF002 #define KVMPPC_GSID_ASDR 0xF003 #define KVMPPC_GSE_GUESTWIDE_START KVMPPC_GSID_BLANK #define KVMPPC_GSE_GUESTWIDE_END KVMPPC_GSID_PROCESS_TABLE #define KVMPPC_GSE_GUESTWIDE_COUNT \ (KVMPPC_GSE_GUESTWIDE_END - KVMPPC_GSE_GUESTWIDE_START + 1) #define KVMPPC_GSE_META_START KVMPPC_GSID_RUN_INPUT #define KVMPPC_GSE_META_END KVMPPC_GSID_VPA #define KVMPPC_GSE_META_COUNT (KVMPPC_GSE_META_END - KVMPPC_GSE_META_START + 1) #define KVMPPC_GSE_DW_REGS_START KVMPPC_GSID_GPR(0) #define KVMPPC_GSE_DW_REGS_END KVMPPC_GSID_CTRL #define KVMPPC_GSE_DW_REGS_COUNT \ (KVMPPC_GSE_DW_REGS_END - KVMPPC_GSE_DW_REGS_START + 1) #define KVMPPC_GSE_W_REGS_START KVMPPC_GSID_CR #define KVMPPC_GSE_W_REGS_END KVMPPC_GSID_PSPB #define KVMPPC_GSE_W_REGS_COUNT \ (KVMPPC_GSE_W_REGS_END - KVMPPC_GSE_W_REGS_START + 1) #define KVMPPC_GSE_VSRS_START KVMPPC_GSID_VSRS(0) #define KVMPPC_GSE_VSRS_END KVMPPC_GSID_VSRS(63) #define KVMPPC_GSE_VSRS_COUNT (KVMPPC_GSE_VSRS_END - KVMPPC_GSE_VSRS_START + 1) #define KVMPPC_GSE_INTR_REGS_START KVMPPC_GSID_HDAR #define KVMPPC_GSE_INTR_REGS_END KVMPPC_GSID_ASDR #define KVMPPC_GSE_INTR_REGS_COUNT \ (KVMPPC_GSE_INTR_REGS_END - KVMPPC_GSE_INTR_REGS_START + 1) #define KVMPPC_GSE_IDEN_COUNT \ (KVMPPC_GSE_GUESTWIDE_COUNT + KVMPPC_GSE_META_COUNT + \ KVMPPC_GSE_DW_REGS_COUNT + KVMPPC_GSE_W_REGS_COUNT + \ KVMPPC_GSE_VSRS_COUNT + KVMPPC_GSE_INTR_REGS_COUNT) /** * Ranges of guest state buffer elements */ enum { KVMPPC_GS_CLASS_GUESTWIDE = 0x01, KVMPPC_GS_CLASS_META = 0x02, KVMPPC_GS_CLASS_DWORD_REG = 0x04, KVMPPC_GS_CLASS_WORD_REG = 0x08, KVMPPC_GS_CLASS_VECTOR = 0x10, KVMPPC_GS_CLASS_INTR = 0x20, }; /** * Types of guest state buffer elements */ enum { KVMPPC_GSE_BE32, KVMPPC_GSE_BE64, KVMPPC_GSE_VEC128, KVMPPC_GSE_PARTITION_TABLE, KVMPPC_GSE_PROCESS_TABLE, KVMPPC_GSE_BUFFER, __KVMPPC_GSE_TYPE_MAX, }; /** * Flags for guest state elements */ enum { KVMPPC_GS_FLAGS_WIDE = 0x01, }; /** * struct kvmppc_gs_part_table - deserialized partition table information * element * @address: start of the partition table * @ea_bits: number of bits in the effective address * @gpd_size: root page directory size */ struct kvmppc_gs_part_table { u64 address; u64 ea_bits; u64 gpd_size; }; /** * struct kvmppc_gs_proc_table - deserialized process table information element * @address: start of the process table * @gpd_size: process table size */ struct kvmppc_gs_proc_table { u64 address; u64 gpd_size; }; /** * struct kvmppc_gs_buff_info - deserialized meta guest state buffer information * @address: start of the guest state buffer * @size: size of the guest state buffer */ struct kvmppc_gs_buff_info { u64 address; u64 size; }; /** * struct kvmppc_gs_header - serialized guest state buffer header * @nelem: count of guest state elements in the buffer * @data: start of the stream of elements in the buffer */ struct kvmppc_gs_header { __be32 nelems; char data[]; } __packed; /** * struct kvmppc_gs_elem - serialized guest state buffer element * @iden: Guest State ID * @len: length of data * @data: the guest state buffer element's value */ struct kvmppc_gs_elem { __be16 iden; __be16 len; char data[]; } __packed; /** * struct kvmppc_gs_buff - a guest state buffer with metadata. * @capacity: total length of the buffer * @len: current length of the elements and header * @guest_id: guest id associated with the buffer * @vcpu_id: vcpu_id associated with the buffer * @hdr: the serialised guest state buffer */ struct kvmppc_gs_buff { size_t capacity; size_t len; unsigned long guest_id; unsigned long vcpu_id; struct kvmppc_gs_header *hdr; }; /** * struct kvmppc_gs_bitmap - a bitmap for element ids * @bitmap: a bitmap large enough for all Guest State IDs */ struct kvmppc_gs_bitmap { /* private: */ DECLARE_BITMAP(bitmap, KVMPPC_GSE_IDEN_COUNT); }; /** * struct kvmppc_gs_parser - a map of element ids to locations in a buffer * @iterator: bitmap used for iterating * @gses: contains the pointers to elements * * A guest state parser is used for deserialising a guest state buffer. * Given a buffer, it then allows looking up guest state elements using * a guest state id. */ struct kvmppc_gs_parser { /* private: */ struct kvmppc_gs_bitmap iterator; struct kvmppc_gs_elem *gses[KVMPPC_GSE_IDEN_COUNT]; }; enum { GSM_GUEST_WIDE = 0x1, GSM_SEND = 0x2, GSM_RECEIVE = 0x4, GSM_GSB_OWNER = 0x8, }; struct kvmppc_gs_msg; /** * struct kvmppc_gs_msg_ops - guest state message behavior * @get_size: maximum size required for the message data * @fill_info: serializes to the guest state buffer format * @refresh_info: dserializes from the guest state buffer format */ struct kvmppc_gs_msg_ops { size_t (*get_size)(struct kvmppc_gs_msg *gsm); int (*fill_info)(struct kvmppc_gs_buff *gsb, struct kvmppc_gs_msg *gsm); int (*refresh_info)(struct kvmppc_gs_msg *gsm, struct kvmppc_gs_buff *gsb); }; /** * struct kvmppc_gs_msg - a guest state message * @bitmap: the guest state ids that should be included * @ops: modify message behavior for reading and writing to buffers * @flags: guest wide or thread wide * @data: location where buffer data will be written to or from. * * A guest state message is allows flexibility in sending in receiving data * in a guest state buffer format. */ struct kvmppc_gs_msg { struct kvmppc_gs_bitmap bitmap; struct kvmppc_gs_msg_ops *ops; unsigned long flags; void *data; }; /************************************************************************** * Guest State IDs **************************************************************************/ u16 kvmppc_gsid_size(u16 iden); unsigned long kvmppc_gsid_flags(u16 iden); u64 kvmppc_gsid_mask(u16 iden); /************************************************************************** * Guest State Buffers **************************************************************************/ struct kvmppc_gs_buff *kvmppc_gsb_new(size_t size, unsigned long guest_id, unsigned long vcpu_id, gfp_t flags); void kvmppc_gsb_free(struct kvmppc_gs_buff *gsb); void *kvmppc_gsb_put(struct kvmppc_gs_buff *gsb, size_t size); int kvmppc_gsb_send(struct kvmppc_gs_buff *gsb, unsigned long flags); int kvmppc_gsb_recv(struct kvmppc_gs_buff *gsb, unsigned long flags); /** * kvmppc_gsb_header() - the header of a guest state buffer * @gsb: guest state buffer * * Returns a pointer to the buffer header. */ static inline struct kvmppc_gs_header * kvmppc_gsb_header(struct kvmppc_gs_buff *gsb) { return gsb->hdr; } /** * kvmppc_gsb_data() - the elements of a guest state buffer * @gsb: guest state buffer * * Returns a pointer to the first element of the buffer data. */ static inline struct kvmppc_gs_elem *kvmppc_gsb_data(struct kvmppc_gs_buff *gsb) { return (struct kvmppc_gs_elem *)kvmppc_gsb_header(gsb)->data; } /** * kvmppc_gsb_len() - the current length of a guest state buffer * @gsb: guest state buffer * * Returns the length including the header of a buffer. */ static inline size_t kvmppc_gsb_len(struct kvmppc_gs_buff *gsb) { return gsb->len; } /** * kvmppc_gsb_capacity() - the capacity of a guest state buffer * @gsb: guest state buffer * * Returns the capacity of a buffer. */ static inline size_t kvmppc_gsb_capacity(struct kvmppc_gs_buff *gsb) { return gsb->capacity; } /** * kvmppc_gsb_paddress() - the physical address of buffer * @gsb: guest state buffer * * Returns the physical address of the buffer. */ static inline u64 kvmppc_gsb_paddress(struct kvmppc_gs_buff *gsb) { return __pa(kvmppc_gsb_header(gsb)); } /** * kvmppc_gsb_nelems() - the number of elements in a buffer * @gsb: guest state buffer * * Returns the number of elements in a buffer */ static inline u32 kvmppc_gsb_nelems(struct kvmppc_gs_buff *gsb) { return be32_to_cpu(kvmppc_gsb_header(gsb)->nelems); } /** * kvmppc_gsb_reset() - empty a guest state buffer * @gsb: guest state buffer * * Reset the number of elements and length of buffer to empty. */ static inline void kvmppc_gsb_reset(struct kvmppc_gs_buff *gsb) { kvmppc_gsb_header(gsb)->nelems = cpu_to_be32(0); gsb->len = sizeof(struct kvmppc_gs_header); } /** * kvmppc_gsb_data_len() - the length of a buffer excluding the header * @gsb: guest state buffer * * Returns the length of a buffer excluding the header */ static inline size_t kvmppc_gsb_data_len(struct kvmppc_gs_buff *gsb) { return gsb->len - sizeof(struct kvmppc_gs_header); } /** * kvmppc_gsb_data_cap() - the capacity of a buffer excluding the header * @gsb: guest state buffer * * Returns the capacity of a buffer excluding the header */ static inline size_t kvmppc_gsb_data_cap(struct kvmppc_gs_buff *gsb) { return gsb->capacity - sizeof(struct kvmppc_gs_header); } /** * kvmppc_gsb_for_each_elem - iterate over the elements in a buffer * @i: loop counter * @pos: set to current element * @gsb: guest state buffer * @rem: initialized to buffer capacity, holds bytes currently remaining in * stream */ #define kvmppc_gsb_for_each_elem(i, pos, gsb, rem) \ kvmppc_gse_for_each_elem(i, kvmppc_gsb_nelems(gsb), pos, \ kvmppc_gsb_data(gsb), \ kvmppc_gsb_data_cap(gsb), rem) /************************************************************************** * Guest State Elements **************************************************************************/ /** * kvmppc_gse_iden() - guest state ID of element * @gse: guest state element * * Return the guest state ID in host endianness. */ static inline u16 kvmppc_gse_iden(const struct kvmppc_gs_elem *gse) { return be16_to_cpu(gse->iden); } /** * kvmppc_gse_len() - length of guest state element data * @gse: guest state element * * Returns the length of guest state element data */ static inline u16 kvmppc_gse_len(const struct kvmppc_gs_elem *gse) { return be16_to_cpu(gse->len); } /** * kvmppc_gse_total_len() - total length of guest state element * @gse: guest state element * * Returns the length of the data plus the ID and size header. */ static inline u16 kvmppc_gse_total_len(const struct kvmppc_gs_elem *gse) { return be16_to_cpu(gse->len) + sizeof(*gse); } /** * kvmppc_gse_total_size() - space needed for a given data length * @size: data length * * Returns size plus the space needed for the ID and size header. */ static inline u16 kvmppc_gse_total_size(u16 size) { return sizeof(struct kvmppc_gs_elem) + size; } /** * kvmppc_gse_data() - pointer to data of a guest state element * @gse: guest state element * * Returns a pointer to the beginning of guest state element data. */ static inline void *kvmppc_gse_data(const struct kvmppc_gs_elem *gse) { return (void *)gse->data; } /** * kvmppc_gse_ok() - checks space exists for guest state element * @gse: guest state element * @remaining: bytes of space remaining * * Returns true if the guest state element can fit in remaining space. */ static inline bool kvmppc_gse_ok(const struct kvmppc_gs_elem *gse, int remaining) { return remaining >= kvmppc_gse_total_len(gse); } /** * kvmppc_gse_next() - iterate to the next guest state element in a stream * @gse: stream of guest state elements * @remaining: length of the guest element stream * * Returns the next guest state element in a stream of elements. The length of * the stream is updated in remaining. */ static inline struct kvmppc_gs_elem * kvmppc_gse_next(const struct kvmppc_gs_elem *gse, int *remaining) { int len = sizeof(*gse) + kvmppc_gse_len(gse); *remaining -= len; return (struct kvmppc_gs_elem *)(gse->data + kvmppc_gse_len(gse)); } /** * kvmppc_gse_for_each_elem - iterate over a stream of guest state elements * @i: loop counter * @max: number of elements * @pos: set to current element * @head: head of elements * @len: length of the stream * @rem: initialized to len, holds bytes currently remaining elements */ #define kvmppc_gse_for_each_elem(i, max, pos, head, len, rem) \ for (i = 0, pos = head, rem = len; kvmppc_gse_ok(pos, rem) && i < max; \ pos = kvmppc_gse_next(pos, &(rem)), i++) int __kvmppc_gse_put(struct kvmppc_gs_buff *gsb, u16 iden, u16 size, const void *data); int kvmppc_gse_parse(struct kvmppc_gs_parser *gsp, struct kvmppc_gs_buff *gsb); /** * kvmppc_gse_put_be32() - add a be32 guest state element to a buffer * @gsb: guest state buffer to add element to * @iden: guest state ID * @val: big endian value */ static inline int kvmppc_gse_put_be32(struct kvmppc_gs_buff *gsb, u16 iden, __be32 val) { __be32 tmp; tmp = val; return __kvmppc_gse_put(gsb, iden, sizeof(__be32), &tmp); } /** * kvmppc_gse_put_u32() - add a host endian 32bit int guest state element to a * buffer * @gsb: guest state buffer to add element to * @iden: guest state ID * @val: host endian value */ static inline int kvmppc_gse_put_u32(struct kvmppc_gs_buff *gsb, u16 iden, u32 val) { __be32 tmp; val &= kvmppc_gsid_mask(iden); tmp = cpu_to_be32(val); return kvmppc_gse_put_be32(gsb, iden, tmp); } /** * kvmppc_gse_put_be64() - add a be64 guest state element to a buffer * @gsb: guest state buffer to add element to * @iden: guest state ID * @val: big endian value */ static inline int kvmppc_gse_put_be64(struct kvmppc_gs_buff *gsb, u16 iden, __be64 val) { __be64 tmp; tmp = val; return __kvmppc_gse_put(gsb, iden, sizeof(__be64), &tmp); } /** * kvmppc_gse_put_u64() - add a host endian 64bit guest state element to a * buffer * @gsb: guest state buffer to add element to * @iden: guest state ID * @val: host endian value */ static inline int kvmppc_gse_put_u64(struct kvmppc_gs_buff *gsb, u16 iden, u64 val) { __be64 tmp; val &= kvmppc_gsid_mask(iden); tmp = cpu_to_be64(val); return kvmppc_gse_put_be64(gsb, iden, tmp); } /** * __kvmppc_gse_put_reg() - add a register type guest state element to a buffer * @gsb: guest state buffer to add element to * @iden: guest state ID * @val: host endian value * * Adds a register type guest state element. Uses the guest state ID for * determining the length of the guest element. If the guest state ID has * bits that can not be set they will be cleared. */ static inline int __kvmppc_gse_put_reg(struct kvmppc_gs_buff *gsb, u16 iden, u64 val) { val &= kvmppc_gsid_mask(iden); if (kvmppc_gsid_size(iden) == sizeof(u64)) return kvmppc_gse_put_u64(gsb, iden, val); if (kvmppc_gsid_size(iden) == sizeof(u32)) { u32 tmp; tmp = (u32)val; if (tmp != val) return -EINVAL; return kvmppc_gse_put_u32(gsb, iden, tmp); } return -EINVAL; } /** * kvmppc_gse_put_vector128() - add a vector guest state element to a buffer * @gsb: guest state buffer to add element to * @iden: guest state ID * @val: 16 byte vector value */ static inline int kvmppc_gse_put_vector128(struct kvmppc_gs_buff *gsb, u16 iden, vector128 *val) { __be64 tmp[2] = { 0 }; union { __vector128 v; u64 dw[2]; } u; u.v = *val; tmp[0] = cpu_to_be64(u.dw[TS_FPROFFSET]); #ifdef CONFIG_VSX tmp[1] = cpu_to_be64(u.dw[TS_VSRLOWOFFSET]); #endif return __kvmppc_gse_put(gsb, iden, sizeof(tmp), &tmp); } /** * kvmppc_gse_put_part_table() - add a partition table guest state element to a * buffer * @gsb: guest state buffer to add element to * @iden: guest state ID * @val: partition table value */ static inline int kvmppc_gse_put_part_table(struct kvmppc_gs_buff *gsb, u16 iden, struct kvmppc_gs_part_table val) { __be64 tmp[3]; tmp[0] = cpu_to_be64(val.address); tmp[1] = cpu_to_be64(val.ea_bits); tmp[2] = cpu_to_be64(val.gpd_size); return __kvmppc_gse_put(gsb, KVMPPC_GSID_PARTITION_TABLE, sizeof(tmp), &tmp); } /** * kvmppc_gse_put_proc_table() - add a process table guest state element to a * buffer * @gsb: guest state buffer to add element to * @iden: guest state ID * @val: process table value */ static inline int kvmppc_gse_put_proc_table(struct kvmppc_gs_buff *gsb, u16 iden, struct kvmppc_gs_proc_table val) { __be64 tmp[2]; tmp[0] = cpu_to_be64(val.address); tmp[1] = cpu_to_be64(val.gpd_size); return __kvmppc_gse_put(gsb, KVMPPC_GSID_PROCESS_TABLE, sizeof(tmp), &tmp); } /** * kvmppc_gse_put_buff_info() - adds a GSB description guest state element to a * buffer * @gsb: guest state buffer to add element to * @iden: guest state ID * @val: guest state buffer description value */ static inline int kvmppc_gse_put_buff_info(struct kvmppc_gs_buff *gsb, u16 iden, struct kvmppc_gs_buff_info val) { __be64 tmp[2]; tmp[0] = cpu_to_be64(val.address); tmp[1] = cpu_to_be64(val.size); return __kvmppc_gse_put(gsb, iden, sizeof(tmp), &tmp); } int __kvmppc_gse_put(struct kvmppc_gs_buff *gsb, u16 iden, u16 size, const void *data); /** * kvmppc_gse_get_be32() - return the data of a be32 element * @gse: guest state element */ static inline __be32 kvmppc_gse_get_be32(const struct kvmppc_gs_elem *gse) { if (WARN_ON(kvmppc_gse_len(gse) != sizeof(__be32))) return 0; return *(__be32 *)kvmppc_gse_data(gse); } /** * kvmppc_gse_get_u32() - return the data of a be32 element in host endianness * @gse: guest state element */ static inline u32 kvmppc_gse_get_u32(const struct kvmppc_gs_elem *gse) { return be32_to_cpu(kvmppc_gse_get_be32(gse)); } /** * kvmppc_gse_get_be64() - return the data of a be64 element * @gse: guest state element */ static inline __be64 kvmppc_gse_get_be64(const struct kvmppc_gs_elem *gse) { if (WARN_ON(kvmppc_gse_len(gse) != sizeof(__be64))) return 0; return *(__be64 *)kvmppc_gse_data(gse); } /** * kvmppc_gse_get_u64() - return the data of a be64 element in host endianness * @gse: guest state element */ static inline u64 kvmppc_gse_get_u64(const struct kvmppc_gs_elem *gse) { return be64_to_cpu(kvmppc_gse_get_be64(gse)); } /** * kvmppc_gse_get_vector128() - return the data of a vector element * @gse: guest state element */ static inline void kvmppc_gse_get_vector128(const struct kvmppc_gs_elem *gse, vector128 *v) { union { __vector128 v; u64 dw[2]; } u = { 0 }; __be64 *src; if (WARN_ON(kvmppc_gse_len(gse) != sizeof(__vector128))) *v = u.v; src = (__be64 *)kvmppc_gse_data(gse); u.dw[TS_FPROFFSET] = be64_to_cpu(src[0]); #ifdef CONFIG_VSX u.dw[TS_VSRLOWOFFSET] = be64_to_cpu(src[1]); #endif *v = u.v; } /************************************************************************** * Guest State Bitmap **************************************************************************/ bool kvmppc_gsbm_test(struct kvmppc_gs_bitmap *gsbm, u16 iden); void kvmppc_gsbm_set(struct kvmppc_gs_bitmap *gsbm, u16 iden); void kvmppc_gsbm_clear(struct kvmppc_gs_bitmap *gsbm, u16 iden); u16 kvmppc_gsbm_next(struct kvmppc_gs_bitmap *gsbm, u16 prev); /** * kvmppc_gsbm_zero - zero the entire bitmap * @gsbm: guest state buffer bitmap */ static inline void kvmppc_gsbm_zero(struct kvmppc_gs_bitmap *gsbm) { bitmap_zero(gsbm->bitmap, KVMPPC_GSE_IDEN_COUNT); } /** * kvmppc_gsbm_fill - fill the entire bitmap * @gsbm: guest state buffer bitmap */ static inline void kvmppc_gsbm_fill(struct kvmppc_gs_bitmap *gsbm) { bitmap_fill(gsbm->bitmap, KVMPPC_GSE_IDEN_COUNT); clear_bit(0, gsbm->bitmap); } /** * kvmppc_gsbm_for_each - iterate the present guest state IDs * @gsbm: guest state buffer bitmap * @iden: current guest state ID */ #define kvmppc_gsbm_for_each(gsbm, iden) \ for (iden = kvmppc_gsbm_next(gsbm, 0); iden != 0; \ iden = kvmppc_gsbm_next(gsbm, iden)) /************************************************************************** * Guest State Parser **************************************************************************/ void kvmppc_gsp_insert(struct kvmppc_gs_parser *gsp, u16 iden, struct kvmppc_gs_elem *gse); struct kvmppc_gs_elem *kvmppc_gsp_lookup(struct kvmppc_gs_parser *gsp, u16 iden); /** * kvmppc_gsp_for_each - iterate the <guest state IDs, guest state element> * pairs * @gsp: guest state buffer bitmap * @iden: current guest state ID * @gse: guest state element */ #define kvmppc_gsp_for_each(gsp, iden, gse) \ for (iden = kvmppc_gsbm_next(&(gsp)->iterator, 0), \ gse = kvmppc_gsp_lookup((gsp), iden); \ iden != 0; iden = kvmppc_gsbm_next(&(gsp)->iterator, iden), \ gse = kvmppc_gsp_lookup((gsp), iden)) /************************************************************************** * Guest State Message **************************************************************************/ /** * kvmppc_gsm_for_each - iterate the guest state IDs included in a guest state * message * @gsp: guest state buffer bitmap * @iden: current guest state ID * @gse: guest state element */ #define kvmppc_gsm_for_each(gsm, iden) \ for (iden = kvmppc_gsbm_next(&gsm->bitmap, 0); iden != 0; \ iden = kvmppc_gsbm_next(&gsm->bitmap, iden)) int kvmppc_gsm_init(struct kvmppc_gs_msg *mgs, struct kvmppc_gs_msg_ops *ops, void *data, unsigned long flags); struct kvmppc_gs_msg *kvmppc_gsm_new(struct kvmppc_gs_msg_ops *ops, void *data, unsigned long flags, gfp_t gfp_flags); void kvmppc_gsm_free(struct kvmppc_gs_msg *gsm); size_t kvmppc_gsm_size(struct kvmppc_gs_msg *gsm); int kvmppc_gsm_fill_info(struct kvmppc_gs_msg *gsm, struct kvmppc_gs_buff *gsb); int kvmppc_gsm_refresh_info(struct kvmppc_gs_msg *gsm, struct kvmppc_gs_buff *gsb); /** * kvmppc_gsm_include - indicate a guest state ID should be included when * serializing * @gsm: guest state message * @iden: guest state ID */ static inline void kvmppc_gsm_include(struct kvmppc_gs_msg *gsm, u16 iden) { kvmppc_gsbm_set(&gsm->bitmap, iden); } /** * kvmppc_gsm_includes - check if a guest state ID will be included when * serializing * @gsm: guest state message * @iden: guest state ID */ static inline bool kvmppc_gsm_includes(struct kvmppc_gs_msg *gsm, u16 iden) { return kvmppc_gsbm_test(&gsm->bitmap, iden); } /** * kvmppc_gsm_includes - indicate all guest state IDs should be included when * serializing * @gsm: guest state message * @iden: guest state ID */ static inline void kvmppc_gsm_include_all(struct kvmppc_gs_msg *gsm) { kvmppc_gsbm_fill(&gsm->bitmap); } /** * kvmppc_gsm_include - clear the guest state IDs that should be included when * serializing * @gsm: guest state message */ static inline void kvmppc_gsm_reset(struct kvmppc_gs_msg *gsm) { kvmppc_gsbm_zero(&gsm->bitmap); } /** * kvmppc_gsb_receive_data - flexibly update values from a guest state buffer * @gsb: guest state buffer * @gsm: guest state message * * Requests updated values for the guest state values included in the guest * state message. The guest state message will then deserialize the guest state * buffer. */ static inline int kvmppc_gsb_receive_data(struct kvmppc_gs_buff *gsb, struct kvmppc_gs_msg *gsm) { int rc; kvmppc_gsb_reset(gsb); rc = kvmppc_gsm_fill_info(gsm, gsb); if (rc < 0) return rc; rc = kvmppc_gsb_recv(gsb, gsm->flags); if (rc < 0) return rc; rc = kvmppc_gsm_refresh_info(gsm, gsb); if (rc < 0) return rc; return 0; } /** * kvmppc_gsb_recv - receive a single guest state ID * @gsb: guest state buffer * @gsm: guest state message * @iden: guest state identity */ static inline int kvmppc_gsb_receive_datum(struct kvmppc_gs_buff *gsb, struct kvmppc_gs_msg *gsm, u16 iden) { int rc; kvmppc_gsm_include(gsm, iden); rc = kvmppc_gsb_receive_data(gsb, gsm); if (rc < 0) return rc; kvmppc_gsm_reset(gsm); return 0; } /** * kvmppc_gsb_send_data - flexibly send values from a guest state buffer * @gsb: guest state buffer * @gsm: guest state message * * Sends the guest state values included in the guest state message. */ static inline int kvmppc_gsb_send_data(struct kvmppc_gs_buff *gsb, struct kvmppc_gs_msg *gsm) { int rc; kvmppc_gsb_reset(gsb); rc = kvmppc_gsm_fill_info(gsm, gsb); if (rc < 0) return rc; rc = kvmppc_gsb_send(gsb, gsm->flags); return rc; } /** * kvmppc_gsb_recv - send a single guest state ID * @gsb: guest state buffer * @gsm: guest state message * @iden: guest state identity */ static inline int kvmppc_gsb_send_datum(struct kvmppc_gs_buff *gsb, struct kvmppc_gs_msg *gsm, u16 iden) { int rc; kvmppc_gsm_include(gsm, iden); rc = kvmppc_gsb_send_data(gsb, gsm); if (rc < 0) return rc; kvmppc_gsm_reset(gsm); return 0; } #endif /* _ASM_POWERPC_GUEST_STATE_BUFFER_H */