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/net/phy/phy-caps.h | 70 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 drivers/net/phy/phy-caps.h (limited to 'drivers/net/phy/phy-caps.h') diff --git a/drivers/net/phy/phy-caps.h b/drivers/net/phy/phy-caps.h new file mode 100644 index 000000000..421088e6f --- /dev/null +++ b/drivers/net/phy/phy-caps.h @@ -0,0 +1,70 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * link caps internal header, for link modes <-> capabilities <-> interfaces + * conversions. + */ + +#ifndef __PHY_CAPS_H +#define __PHY_CAPS_H + +#include +#include + +enum { + LINK_CAPA_10HD = 0, + LINK_CAPA_10FD, + LINK_CAPA_100HD, + LINK_CAPA_100FD, + LINK_CAPA_1000HD, + LINK_CAPA_1000FD, + LINK_CAPA_2500FD, + LINK_CAPA_5000FD, + LINK_CAPA_10000FD, + LINK_CAPA_20000FD, + LINK_CAPA_25000FD, + LINK_CAPA_40000FD, + LINK_CAPA_50000FD, + LINK_CAPA_56000FD, + LINK_CAPA_80000FD, + LINK_CAPA_100000FD, + LINK_CAPA_200000FD, + LINK_CAPA_400000FD, + LINK_CAPA_800000FD, + LINK_CAPA_1600000FD, + + __LINK_CAPA_MAX, +}; + +#define LINK_CAPA_ALL GENMASK((__LINK_CAPA_MAX - 1), 0) + +struct link_capabilities { + int speed; + unsigned int duplex; + __ETHTOOL_DECLARE_LINK_MODE_MASK(linkmodes); +}; + +int __init phy_caps_init(void); + +size_t phy_caps_speeds(unsigned int *speeds, size_t size, + unsigned long *linkmodes); +void phy_caps_linkmode_max_speed(u32 max_speed, unsigned long *linkmodes); +bool phy_caps_valid(int speed, int duplex, const unsigned long *linkmodes); +void phy_caps_linkmodes(unsigned long caps, unsigned long *linkmodes); +unsigned long phy_caps_from_interface(phy_interface_t interface); + +const struct link_capabilities * +phy_caps_lookup_by_linkmode(const unsigned long *linkmodes); + +const struct link_capabilities * +phy_caps_lookup_by_linkmode_rev(const unsigned long *linkmodes, bool fdx_only); + +const struct link_capabilities * +phy_caps_lookup(int speed, unsigned int duplex, const unsigned long *supported, + bool exact); + +void phy_caps_medium_get_supported(unsigned long *supported, + enum ethtool_link_medium medium, + int lanes); +u32 phy_caps_mediums_from_linkmodes(unsigned long *linkmodes); + +#endif /* __PHY_CAPS_H */ -- cgit v1.3.1