diff options
| author |   Cédric Le Goater <clg@kaod.org> | 2021-11-05 11:26:35 +0100 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-11-25 11:25:31 +1100 |
| commit | 1e7684dc4fc70271c8bf86d397bd4fbfb3581e65 (patch) | |
| tree | 5a1d7f358d1583a33998b7bf5422d6eccfd671e6 /arch/powerpc/sysdev | |
| parent | powerpc/xive: Add a kernel parameter for StoreEOI (diff) | |
| download | linux-dev-1e7684dc4fc70271c8bf86d397bd4fbfb3581e65.tar.xz linux-dev-1e7684dc4fc70271c8bf86d397bd4fbfb3581e65.zip | |
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: 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
Diffstat (limited to 'arch/powerpc/sysdev')
| -rw-r--r-- | arch/powerpc/sysdev/xive/common.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/xive/native.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/xive/xive-internal.h | 1 |
3 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index 3b453973a5d2..43f7f7df6407 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -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) { } diff --git a/arch/powerpc/sysdev/xive/native.c b/arch/powerpc/sysdev/xive/native.c index 7ec8911dad57..d6a091dc1bce 100644 --- a/arch/powerpc/sysdev/xive/native.c +++ b/arch/powerpc/sysdev/xive/native.c @@ -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) { diff --git a/arch/powerpc/sysdev/xive/xive-internal.h b/arch/powerpc/sysdev/xive/xive-internal.h index 504e7edce358..e0941bc64430 100644 --- a/arch/powerpc/sysdev/xive/xive-internal.h +++ b/arch/powerpc/sysdev/xive/xive-internal.h @@ -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 */ |