diff options
| author | Zeng Chi <zengchi@kylinos.cn> | 2026-09-21 18:24:42 +0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-09-22 08:36:16 -0700 |
| commit | 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d (patch) | |
| tree | 660d50d4139cb750fbde1ae3432452c20726c99d /include/sound/sdca_regmap.h | |
| download | linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.tar.gz linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.zip | |
KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted
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 <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'include/sound/sdca_regmap.h')
| -rw-r--r-- | include/sound/sdca_regmap.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/sound/sdca_regmap.h b/include/sound/sdca_regmap.h new file mode 100644 index 000000000..792540a53 --- /dev/null +++ b/include/sound/sdca_regmap.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * The MIPI SDCA specification is available for public downloads at + * https://www.mipi.org/mipi-sdca-v1-0-download + * + * Copyright (C) 2025 Cirrus Logic, Inc. and + * Cirrus Logic International Semiconductor Ltd. + */ + +#ifndef __SDCA_REGMAP_H__ +#define __SDCA_REGMAP_H__ + +struct device; +struct sdca_function_data; +struct regmap; +struct reg_default; + +bool sdca_regmap_readable(struct sdca_function_data *function, unsigned int reg); +bool sdca_regmap_writeable(struct sdca_function_data *function, unsigned int reg); +bool sdca_regmap_volatile(struct sdca_function_data *function, unsigned int reg); +bool sdca_regmap_deferrable(struct sdca_function_data *function, unsigned int reg); +int sdca_regmap_mbq_size(struct sdca_function_data *function, unsigned int reg); + +int sdca_regmap_count_constants(struct device *dev, struct sdca_function_data *function); +int sdca_regmap_populate_constants(struct device *dev, struct sdca_function_data *function, + struct reg_default *consts); + +int sdca_regmap_write_defaults(struct device *dev, struct regmap *regmap, + struct sdca_function_data *function); +int sdca_regmap_write_init(struct device *dev, struct regmap *regmap, + struct sdca_function_data *function); + +#endif // __SDCA_REGMAP_H__ |