From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
kernel-team@android.com
Subject: [PATCH 09/10] arm64: Add wfet()/wfit() helpers
Date: Tue, 12 Apr 2022 14:13:02 +0100 [thread overview]
Message-ID: <20220412131303.504690-10-maz@kernel.org> (raw)
In-Reply-To: <20220412131303.504690-1-maz@kernel.org>
Just like we have helpers for WFI and WFE, add the WFxT versions.
Note that the encoding is that reported by objdump, as no currrent
toolchain knows about these instructions yet.
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/include/asm/barrier.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h
index 62217be36217..9f3e2c3d2ca0 100644
--- a/arch/arm64/include/asm/barrier.h
+++ b/arch/arm64/include/asm/barrier.h
@@ -16,7 +16,11 @@
#define sev() asm volatile("sev" : : : "memory")
#define wfe() asm volatile("wfe" : : : "memory")
+#define wfet(val) asm volatile("msr s0_3_c1_c0_0, %0" \
+ : : "r" (val) : "memory")
#define wfi() asm volatile("wfi" : : : "memory")
+#define wfit(val) asm volatile("msr s0_3_c1_c0_1, %0" \
+ : : "r" (val) : "memory")
#define isb() asm volatile("isb" : : : "memory")
#define dmb(opt) asm volatile("dmb " #opt : : : "memory")
--
2.34.1
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next prev parent reply other threads:[~2022-04-12 13:16 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-12 13:12 [PATCH 00/10] arm64: Add initial support for FEAT_WFxT Marc Zyngier
2022-04-12 13:12 ` [PATCH 01/10] arm64: Expand ESR_ELx_WFx_ISS_TI to match its ARMv8.7 definition Marc Zyngier
2022-04-13 11:50 ` Joey Gouly
2022-04-12 13:12 ` [PATCH 02/10] arm64: Add RV and RN fields for ESR_ELx_WFx_ISS Marc Zyngier
2022-04-13 11:53 ` Joey Gouly
2022-04-12 13:12 ` [PATCH 03/10] KVM: arm64: Simplify kvm_cpu_has_pending_timer() Marc Zyngier
2022-04-12 13:12 ` [PATCH 04/10] KVM: arm64: Introduce kvm_counter_compute_delta() helper Marc Zyngier
2022-04-12 13:12 ` [PATCH 05/10] KVM: arm64: Handle blocking WFIT instruction Marc Zyngier
2022-04-12 13:12 ` [PATCH 06/10] KVM: arm64: Offer early resume for non-blocking WFxT instructions Marc Zyngier
2022-04-13 11:37 ` Joey Gouly
2022-04-13 13:46 ` Marc Zyngier
2022-04-12 13:13 ` [PATCH 07/10] KVM: arm64: Expose the WFXT feature to guests Marc Zyngier
2022-04-12 13:13 ` [PATCH 08/10] arm64: Add HWCAP advertising FEAT_WFXT Marc Zyngier
2022-04-12 13:13 ` Marc Zyngier [this message]
2022-04-12 13:13 ` [PATCH 10/10] arm64: Use WFxT for __delay() when possible Marc Zyngier
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