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

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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: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211105102636.1016378-11-clg@kaod.org
This commit is contained in:
Cédric Le Goater 2021-11-05 11:26:35 +01:00 • committed by Michael Ellerman
parent c21ee04f11
commit 1e7684dc4f
3 changed files with 3 additions and 1 deletions
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2
arch/powerpc/sysdev/xive/native.c
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@ -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)
{