From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- drivers/crypto/bcm/util.h | 113 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 drivers/crypto/bcm/util.h (limited to 'drivers/crypto/bcm/util.h') diff --git a/drivers/crypto/bcm/util.h b/drivers/crypto/bcm/util.h new file mode 100644 index 000000000..61c256384 --- /dev/null +++ b/drivers/crypto/bcm/util.h @@ -0,0 +1,113 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright 2016 Broadcom + */ + +#ifndef _UTIL_H +#define _UTIL_H + +#include +#include + +#include "spu.h" + +extern int flow_debug_logging; +extern int packet_debug_logging; +extern int debug_logging_sleep; + +#ifdef DEBUG +#define flow_log(...) \ + do { \ + if (flow_debug_logging) { \ + printk(__VA_ARGS__); \ + if (debug_logging_sleep) \ + msleep(debug_logging_sleep); \ + } \ + } while (0) +#define flow_dump(msg, var, var_len) \ + do { \ + if (flow_debug_logging) { \ + print_hex_dump(KERN_ALERT, msg, DUMP_PREFIX_NONE, \ + 16, 1, var, var_len, false); \ + if (debug_logging_sleep) \ + msleep(debug_logging_sleep); \ + } \ + } while (0) + +#define packet_log(...) \ + do { \ + if (packet_debug_logging) { \ + printk(__VA_ARGS__); \ + if (debug_logging_sleep) \ + msleep(debug_logging_sleep); \ + } \ + } while (0) +#define packet_dump(msg, var, var_len) \ + do { \ + if (packet_debug_logging) { \ + print_hex_dump(KERN_ALERT, msg, DUMP_PREFIX_NONE, \ + 16, 1, var, var_len, false); \ + if (debug_logging_sleep) \ + msleep(debug_logging_sleep); \ + } \ + } while (0) + +void __dump_sg(struct scatterlist *sg, unsigned int skip, unsigned int len); + +#define dump_sg(sg, skip, len) __dump_sg(sg, skip, len) + +#else /* !DEBUG_ON */ + +static inline void flow_log(const char *format, ...) +{ +} + +static inline void flow_dump(const char *msg, const void *var, size_t var_len) +{ +} + +static inline void packet_log(const char *format, ...) +{ +} + +static inline void packet_dump(const char *msg, const void *var, size_t var_len) +{ +} + +static inline void dump_sg(struct scatterlist *sg, unsigned int skip, + unsigned int len) +{ +} + +#endif /* DEBUG_ON */ + +int spu_sg_at_offset(struct scatterlist *sg, unsigned int skip, + struct scatterlist **sge, unsigned int *sge_offset); + +/* Copy sg data, from skip, length len, to dest */ +void sg_copy_part_to_buf(struct scatterlist *src, u8 *dest, + unsigned int len, unsigned int skip); +/* Copy src into scatterlist from offset, length len */ +void sg_copy_part_from_buf(struct scatterlist *dest, u8 *src, + unsigned int len, unsigned int skip); + +int spu_sg_count(struct scatterlist *sg_list, unsigned int skip, int nbytes); +u32 spu_msg_sg_add(struct scatterlist **to_sg, + struct scatterlist **from_sg, u32 *skip, + u8 from_nents, u32 tot_len); + +void add_to_ctr(u8 *ctr_pos, unsigned int increment); + +/* produce a message digest from data of length n bytes */ +int do_shash(unsigned char *name, unsigned char *result, + const u8 *data1, unsigned int data1_len, + const u8 *data2, unsigned int data2_len, + const u8 *key, unsigned int key_len); + +char *spu_alg_name(enum spu_cipher_alg alg, enum spu_cipher_mode mode); + +void spu_setup_debugfs(void); +void spu_free_debugfs(void); +void format_value_ccm(unsigned int val, u8 *buf, u8 len); + +#endif -- cgit v1.3.1