linux-kernel - [PATCH v7 17/25] arm64: gic-v3: Implement arch support for priority masking

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 12 Dec 2018 16:47:17 +0000
From:   Julien Thierry <julien.thierry@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, daniel.thompson@...aro.org,
        joel@...lfernandes.org, marc.zyngier@....com,
        christoffer.dall@....com, james.morse@....com,
        catalin.marinas@....com, will.deacon@....com, mark.rutland@....com,
        Julien Thierry <julien.thierry@....com>
Subject: [PATCH v7 17/25] arm64: gic-v3: Implement arch support for priority masking

Implement architecture specific primitive allowing the GICv3 driver to
use priorities to mask interrupts.

Signed-off-by: Julien Thierry <julien.thierry@....com>
Suggested-by: Daniel Thompson <daniel.thompson@...aro.org>
Cc: Marc Zyngier <marc.zyngier@....com>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will.deacon@....com>
---
 arch/arm64/include/asm/arch_gicv3.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/include/asm/arch_gicv3.h b/arch/arm64/include/asm/arch_gicv3.h
index b5f8142..14b41dd 100644
--- a/arch/arm64/include/asm/arch_gicv3.h
+++ b/arch/arm64/include/asm/arch_gicv3.h
@@ -22,6 +22,7 @@
 
 #ifndef __ASSEMBLY__
 
+#include <linux/irqchip/arm-gic-common.h>
 #include <linux/stringify.h>
 #include <asm/barrier.h>
 #include <asm/cacheflush.h>
@@ -162,14 +163,13 @@ static inline bool gic_prio_masking_enabled(void)
 
 static inline void gic_pmr_mask_irqs(void)
 {
-	/* Should not get called yet. */
-	WARN_ON_ONCE(true);
+	BUILD_BUG_ON(GICD_INT_DEF_PRI <= GIC_PRIO_IRQOFF);
+	gic_write_pmr(GIC_PRIO_IRQOFF);
 }
 
 static inline void gic_arch_enable_irqs(void)
 {
-	/* Should not get called yet. */
-	WARN_ON_ONCE(true);
+	asm volatile ("msr daifclr, #2" : : : "memory");
 }
 
 #endif /* __ASSEMBLY__ */
-- 
1.9.1