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| author | Alexandru Elisei <alexandru.elisei@arm.com> | 2020-09-12 17:37:06 +0200 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-09-13 18:51:35 +0200 |
| commit | 4e594ad1068ea1db359d6161f580f03edecf6cb0 (patch) | |
| tree | 37cbd0544328dafc62bf24f5abb06ec8a7ff33cf /drivers | |
| parent | Linux 5.9-rc4 (diff) | |
| download | linux-4e594ad1068ea1db359d6161f580f03edecf6cb0.tar.xz linux-4e594ad1068ea1db359d6161f580f03edecf6cb0.zip | |
irqchip/gic-v3: Spell out when pseudo-NMIs are enabled
When NMIs cannot be enabled, the driver prints a message stating that
unambiguously. When they are enabled, the only feedback we get is a message
regarding the use of synchronization for ICC_PMR_EL1 writes, which is not
as useful for a user who is not intimately familiar with how NMIs are
implemented.
Let's make it obvious that pseudo-NMIs are enabled. Keep the message about
using a barrier for ICC_PMR_EL1 writes, because it has a non-negligible
impact on performance.
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200912153707.667731-2-alexandru.elisei@arm.com
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 850842f27bee..aa9b43d412b2 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -1564,8 +1564,8 @@ static void gic_enable_nmi_support(void) if (gic_read_ctlr() & ICC_CTLR_EL1_PMHE_MASK) static_branch_enable(&gic_pmr_sync); - pr_info("%s ICC_PMR_EL1 synchronisation\n", - static_branch_unlikely(&gic_pmr_sync) ? "Forcing" : "Relaxing"); + pr_info("Pseudo-NMIs enabled using %s ICC_PMR_EL1 synchronisation\n", + static_branch_unlikely(&gic_pmr_sync) ? "forced" : "relaxed"); static_branch_enable(&supports_pseudo_nmis); |