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From: Richard Henderson <richard.henderson@linaro.org>
To: Marc Zyngier <maz@kernel.org>, qemu-devel@nongnu.org
Cc: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>,
	kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH v2 2/5] target/arm: Honor HCR_EL2.TID1 trapping requirements
Date: Mon, 2 Dec 2019 07:22:53 -0800
Message-ID: <091eee4b-dd8f-477d-438e-699dc3c587af@linaro.org> (raw)
In-Reply-To: <20191201122018.25808-3-maz@kernel.org>

On 12/1/19 12:20 PM, Marc Zyngier wrote:
> HCR_EL2.TID1 mandates that access from EL1 to REVIDR_EL1, AIDR_EL1
> (and their 32bit equivalents) as well as TCMTR, TLBTR are trapped
> to EL2. QEMU ignores it, making it harder for a hypervisor to
> virtualize the HW (though to be fair, no known hypervisor actually
> cares).
> 
> Do the right thing by trapping to EL2 if HCR_EL2.TID1 is set.
> 
> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
>  target/arm/helper.c | 36 ++++++++++++++++++++++++++++++++----
>  1 file changed, 32 insertions(+), 4 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~

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Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-01 12:20 [PATCH v2 0/5] target/arm: More EL2 trapping fixes Marc Zyngier
2019-12-01 12:20 ` [PATCH v2 1/5] target/arm: Honor HCR_EL2.TID2 trapping requirements Marc Zyngier
2019-12-02 13:52   ` Edgar E. Iglesias
2019-12-02 15:10   ` Richard Henderson
2019-12-01 12:20 ` [PATCH v2 2/5] target/arm: Honor HCR_EL2.TID1 " Marc Zyngier
2019-12-02 15:22   ` Richard Henderson [this message]
2019-12-01 12:20 ` [PATCH v2 3/5] target/arm: Handle trapping to EL2 of AArch32 VMRS instructions Marc Zyngier
2019-12-02 15:35   ` Richard Henderson
2019-12-02 16:45     ` Marc Zyngier
2019-12-02 16:56       ` Richard Henderson
2019-12-02 17:15         ` Marc Zyngier
2019-12-06 14:08   ` Peter Maydell
2019-12-06 14:14     ` Marc Zyngier
2019-12-06 17:45     ` Richard Henderson
2019-12-01 12:20 ` [PATCH v2 4/5] target/arm: Handle AArch32 CP15 trapping via HSTR_EL2 Marc Zyngier
2019-12-02 15:52   ` Richard Henderson
2019-12-01 12:20 ` [PATCH v2 5/5] target/arm: Add support for missing Jazelle system registers Marc Zyngier
2019-12-02 14:07   ` Edgar E. Iglesias
2019-12-02 15:57   ` Richard Henderson
2019-12-06 13:56     ` Peter Maydell
2019-12-06 14:13 ` [PATCH v2 0/5] target/arm: More EL2 trapping fixes Peter Maydell
2019-12-06 14:19   ` Marc Zyngier

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