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Message-ID: <YTAMPIBDSl1rJHUR@google.com>
Date: Wed, 1 Sep 2021 23:26:52 +0000
From: Oliver Upton <oupton@...gle.com>
To: Raghavendra Rao Ananta <rananta@...gle.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>, Marc Zyngier <maz@...nel.org>,
James Morse <james.morse@....com>,
Alexandru Elisei <alexandru.elisei@....com>,
Suzuki K Poulose <suzuki.poulose@....com>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>, Peter Shier <pshier@...gle.com>,
Ricardo Koller <ricarkol@...gle.com>,
Reiji Watanabe <reijiw@...gle.com>,
Jing Zhang <jingzhangos@...gle.com>,
linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH v3 06/12] KVM: arm64: selftests: Add support to disable
and enable local IRQs
On Wed, Sep 01, 2021 at 09:14:06PM +0000, Raghavendra Rao Ananta wrote:
> 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@...gle.com>
Reviewed-by: Oliver Upton <oupton@...gle.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 78df059dc974..c35bb7b8e870 100644
> --- a/tools/testing/selftests/kvm/include/aarch64/processor.h
> +++ b/tools/testing/selftests/kvm/include/aarch64/processor.h
> @@ -241,4 +241,14 @@ 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 */
> --
> 2.33.0.153.gba50c8fa24-goog
>
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