From: Liao Chang <liaochang1@huawei.com>
To: <catalin.marinas@arm.com>, <will@kernel.org>, <maz@kernel.org>,
<oliver.upton@linux.dev>, <james.morse@arm.com>,
<suzuki.poulose@arm.com>, <yuzenghui@huawei.com>,
<tglx@linutronix.de>, <mark.rutland@arm.com>, <ardb@kernel.org>,
<broonie@kernel.org>, <liaochang1@huawei.com>,
<anshuman.khandual@arm.com>, <miguel.luis@oracle.com>,
<joey.gouly@arm.com>, <ryan.roberts@arm.com>,
<jeremy.linton@arm.com>, <ericchancf@google.com>,
<kristina.martsenko@arm.com>, <robh@kernel.org>,
<scott@os.amperecomputing.com>, <songshuaishuai@tinylab.org>,
<shijie@os.amperecomputing.com>, <akpm@linux-foundation.org>,
<bhe@redhat.com>, <horms@kernel.org>, <mhiramat@kernel.org>,
<rmk+kernel@armlinux.org.uk>, <shahuang@redhat.com>,
<takakura@valinux.co.jp>, <dianders@chromium.org>,
<swboyd@chromium.org>, <sumit.garg@linaro.org>,
<frederic@kernel.org>, <reijiw@google.com>,
<akihiko.odaki@daynix.com>, <ruanjinjie@huawei.com>
Cc: <linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <kvmarm@lists.linux.dev>
Subject: [PATCH v3 7/8] irqchip/gic-v3: Improve the maintainability of NMI masking in GIC driver
Date: Mon, 15 Apr 2024 06:47:57 +0000 [thread overview]
Message-ID: <20240415064758.3250209-8-liaochang1@huawei.com> (raw)
In-Reply-To: <20240415064758.3250209-1-liaochang1@huawei.com>
It has a better maintainability to use the local_nmi_enable() in GIC
driver to unmask NMI and keep regular IRQ and FIQ maskable, instead of
writing raw value into DAIF, PMR and ALLINT directly.
Signed-off-by: Liao Chang <liaochang1@huawei.com>
---
arch/arm64/include/asm/daifflags.h | 13 +++++++++++++
drivers/irqchip/irq-gic-v3.c | 6 ++----
2 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/include/asm/daifflags.h b/arch/arm64/include/asm/daifflags.h
index b831def08bb3..1196eb85aa8d 100644
--- a/arch/arm64/include/asm/daifflags.h
+++ b/arch/arm64/include/asm/daifflags.h
@@ -330,4 +330,17 @@ static inline void local_errnmi_enable(void)
irqflags.fields.allint = 0;
local_allint_restore(irqflags);
}
+
+/*
+ * local_nmi_enable - Enable NMI with or without superpriority.
+ */
+static inline void local_nmi_enable(void)
+{
+ arch_irqflags_t irqflags;
+
+ irqflags.fields.daif = read_sysreg(daif);
+ irqflags.fields.pmr = GIC_PRIO_IRQOFF;
+ irqflags.fields.allint = 0;
+ local_allint_restore(irqflags);
+}
#endif
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 6fb276504bcc..ed7d8d87768f 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -33,6 +33,7 @@
#include <asm/exception.h>
#include <asm/smp_plat.h>
#include <asm/virt.h>
+#include <asm/daifflags.h>
#include "irq-gic-common.h"
@@ -813,10 +814,7 @@ static void __gic_handle_irq_from_irqson(struct pt_regs *regs)
nmi_exit();
}
- if (gic_prio_masking_enabled()) {
- gic_pmr_mask_irqs();
- gic_arch_enable_irqs();
- }
+ local_nmi_enable();
if (!is_nmi)
__gic_handle_irq(irqnr, regs);
--
2.34.1
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next prev parent reply other threads:[~2024-04-15 6:54 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-15 6:47 [PATCH v3 0/8] Rework the DAIF mask, unmask and track API Liao Chang
2024-04-15 6:47 ` [PATCH v3 1/8] arm64/sysreg: Add definitions for immediate versions of MSR ALLINT Liao Chang
2024-05-03 16:00 ` Mark Rutland
2024-05-06 12:12 ` Liao, Chang
2024-05-06 15:15 ` Mark Brown
2024-05-07 7:41 ` Liao, Chang
2024-05-07 14:52 ` Mark Brown
2024-06-03 3:26 ` Liao, Chang
2024-06-04 13:29 ` Mark Brown
2024-06-05 9:52 ` Liao, Chang
2024-06-14 4:00 ` Liao, Chang
2024-04-15 6:47 ` [PATCH v3 2/8] arm64/cpufeature: Detect PE support for FEAT_NMI Liao Chang
2024-04-15 6:47 ` [PATCH v3 3/8] arm64/nmi: Add Kconfig for NMI Liao Chang
2024-04-15 6:47 ` [PATCH v3 4/8] arm64: daifflags: Add logical exception masks covering DAIF + PMR + ALLINT Liao Chang
2024-04-15 6:47 ` [PATCH v3 5/8] arm64: Unify exception masking at entry and exit of exception Liao Chang
2024-04-15 6:47 ` [PATCH v3 6/8] arm64: Deprecate old local_daif_{mask,save,restore} Liao Chang
2024-04-15 6:47 ` Liao Chang [this message]
2024-04-15 6:47 ` [PATCH v3 8/8] arm64: kprobe: Keep NMI maskabled while kprobe is stepping xol Liao Chang
2024-05-03 17:10 ` [PATCH v3 0/8] Rework the DAIF mask, unmask and track API Mark Rutland
2024-05-06 12:12 ` Liao, Chang
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