Commit 1e7684dc authored by Cédric Le Goater's avatar Cédric Le Goater Committed by Michael Ellerman
Browse files

powerpc/xive: Add a debugfs toggle for save-restore 



On POWER10, the automatic "save & restore" of interrupt context is
always available. Provide a way to deactivate it for tests or
performance.

Signed-off-by: default avatarCédric Le Goater <clg@kaod.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211105102636.1016378-11-clg@kaod.org
parent c21ee04f

arch/powerpc/sysdev/xive/common.c

+1 −0
Original line number Diff line number Diff line
@@ -1847,6 +1847,7 @@ static void xive_core_debugfs_create(void) 
				    &xive_eq_debug_fops);

	}

	debugfs_create_bool("store-eoi", 0600, xive_dir, &xive_store_eoi);

	debugfs_create_bool("save-restore", 0600, xive_dir, &xive_has_save_restore);

}

#else

static inline void xive_core_debugfs_create(void) { }

arch/powerpc/sysdev/xive/native.c

+1 −1
Original line number Diff line number Diff line
@@ -41,7 +41,7 @@ static u32 xive_queue_shift; 
static u32 xive_pool_vps = XIVE_INVALID_VP;

static struct kmem_cache *xive_provision_cache;

static bool xive_has_single_esc;

static bool xive_has_save_restore;

bool xive_has_save_restore;



int xive_native_populate_irq_data(u32 hw_irq, struct xive_irq_data *data)

{

arch/powerpc/sysdev/xive/xive-internal.h

+1 −0
Original line number Diff line number Diff line
@@ -72,5 +72,6 @@ static inline u32 xive_alloc_order(u32 queue_shift) 
}



extern bool xive_cmdline_disabled;

extern bool xive_has_save_restore;



#endif /*  __XIVE_INTERNAL_H */