Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Tue, 14 Sep 2021 22:31:07 +0000
In-Reply-To: <20210914223114.435273-1-rananta@google.com>
Message-Id: <20210914223114.435273-9-rananta@google.com>
Mime-Version: 1.0
References: <20210914223114.435273-1-rananta@google.com>
Subject: [PATCH v7 08/15] KVM: arm64: selftests: Add support to disable and
 enable local IRQs
From:   Raghavendra Rao Ananta <rananta@google.com>
To:     Paolo Bonzini <pbonzini@redhat.com>, Marc Zyngier <maz@kernel.org>,
        Andrew Jones <drjones@redhat.com>,
        James Morse <james.morse@arm.com>,
        Alexandru Elisei <alexandru.elisei@arm.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>
Cc:     Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>, Peter Shier <pshier@google.com>,
        Ricardo Koller <ricarkol@google.com>,
        Oliver Upton <oupton@google.com>,
        Reiji Watanabe <reijiw@google.com>,
        Jing Zhang <jingzhangos@google.com>,
        Raghavendra Rao Anata <rananta@google.com>,
        linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu,
        linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Add functions local_irq_enable() and local_irq_disable() to
enable and disable the IRQs from the guest, respectively.

Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
Reviewed-by: Oliver Upton <oupton@google.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
---
 .../testing/selftests/kvm/include/aarch64/processor.h  | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/aarch64/processor.h b/tools/testing/selftests/kvm/include/aarch64/processor.h
index 265054c24481..515d04a3c27d 100644
--- a/tools/testing/selftests/kvm/include/aarch64/processor.h
+++ b/tools/testing/selftests/kvm/include/aarch64/processor.h
@@ -172,4 +172,14 @@ static __always_inline u32 __raw_readl(const volatile void *addr)
 #define writel(v,c)		({ __iowmb(); writel_relaxed((v),(c));})
 #define readl(c)		({ u32 __v = readl_relaxed(c); __iormb(__v); __v; })
 
+static inline void local_irq_enable(void)
+{
+	asm volatile("msr daifclr, #3" : : : "memory");
+}
+
+static inline void local_irq_disable(void)
+{
+	asm volatile("msr daifset, #3" : : : "memory");
+}
+
 #endif /* SELFTEST_KVM_PROCESSOR_H */
-- 
2.33.0.309.g3052b89438-goog