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 --- arch/powerpc/sysdev/mpic.h | 60 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 arch/powerpc/sysdev/mpic.h (limited to 'arch/powerpc/sysdev/mpic.h') diff --git a/arch/powerpc/sysdev/mpic.h b/arch/powerpc/sysdev/mpic.h new file mode 100644 index 000000000..bb460ff57 --- /dev/null +++ b/arch/powerpc/sysdev/mpic.h @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _POWERPC_SYSDEV_MPIC_H +#define _POWERPC_SYSDEV_MPIC_H + +/* + * Copyright 2006-2007, Michael Ellerman, IBM Corporation. + */ + +#ifdef CONFIG_PCI_MSI +extern void mpic_msi_reserve_hwirq(struct mpic *mpic, irq_hw_number_t hwirq); +int __init mpic_msi_init_allocator(struct mpic *mpic); +int __init mpic_u3msi_init(struct mpic *mpic); +#else +static inline void mpic_msi_reserve_hwirq(struct mpic *mpic, + irq_hw_number_t hwirq) +{ + return; +} + +static inline int mpic_u3msi_init(struct mpic *mpic) +{ + return -1; +} +#endif + +#if defined(CONFIG_PCI_MSI) && defined(CONFIG_PPC_PASEMI) +int __init mpic_pasemi_msi_init(struct mpic *mpic); +#else +static inline int mpic_pasemi_msi_init(struct mpic *mpic) { return -1; } +#endif + +extern int mpic_set_irq_type(struct irq_data *d, unsigned int flow_type); +extern void mpic_set_vector(unsigned int virq, unsigned int vector); +extern int mpic_set_affinity(struct irq_data *d, + const struct cpumask *cpumask, bool force); +extern void mpic_reset_core(int cpu); + +#ifdef CONFIG_FSL_SOC +extern int mpic_map_error_int(struct mpic *mpic, unsigned int virq, irq_hw_number_t hw); +void __init mpic_err_int_init(struct mpic *mpic, irq_hw_number_t irqnum); +int __init mpic_setup_error_int(struct mpic *mpic, int intvec); +#else +static inline int mpic_map_error_int(struct mpic *mpic, unsigned int virq, irq_hw_number_t hw) +{ + return 0; +} + + +static inline void mpic_err_int_init(struct mpic *mpic, irq_hw_number_t irqnum) +{ + return; +} + +static inline int mpic_setup_error_int(struct mpic *mpic, int intvec) +{ + return -1; +} +#endif + +#endif /* _POWERPC_SYSDEV_MPIC_H */ -- cgit v1.3.1