From: Richard Henderson <richard.henderson@linaro.org>
To: "Alex Bennée" <alex.bennee@linaro.org>, peter.maydell@linaro.org
Cc: qemu-arm@nongnu.org, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH v3 1/5] target/arm: support reading of CNT[VCT|FRQ]_EL0 from user-space
Date: Tue, 26 Jun 2018 21:52:18 -0700 [thread overview]
Message-ID: <d50f4ce2-6219-d9d1-34a2-e4246f20e927@linaro.org> (raw)
In-Reply-To: <20180625160009.17437-2-alex.bennee@linaro.org>
On 06/25/2018 09:00 AM, Alex Bennée wrote:
> Since kernel commit a86bd139f2 (arm64: arch_timer: Enable CNTVCT_EL0
> trap..) user-space has been able to read these system registers. As we
> can't use QEMUTimer's in linux-user mode we just directly call
> cpu_get_clock().
>
> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
>
> ---
> v2
> - include CNTFRQ_EL0 for PL0_R only
> v3
> - use NANOSECONDS_PER_SECOND / GTIMER_SCALE
> ---
> target/arm/helper.c | 27 ++++++++++++++++++++++++---
> 1 file changed, 24 insertions(+), 3 deletions(-)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
next prev parent reply other threads:[~2018-06-27 4:52 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-25 16:00 [Qemu-devel] [PATCH v3 0/5] support reading some CPUID/CNT registers from user-space Alex Bennée
2018-06-25 16:00 ` [Qemu-devel] [PATCH v3 1/5] target/arm: support reading of CNT[VCT|FRQ]_EL0 " Alex Bennée
2018-06-27 4:52 ` Richard Henderson [this message]
2018-06-27 16:57 ` Emilio G. Cota
2018-06-25 16:00 ` [Qemu-devel] [PATCH v3 2/5] target/arm: relax permission checks for HWCAP_CPUID registers Alex Bennée
2018-06-27 5:25 ` Richard Henderson
2018-06-28 14:25 ` Peter Maydell
2018-06-28 14:39 ` Alex Bennée
2018-06-25 16:00 ` [Qemu-devel] [PATCH v3 3/5] target/arm: expose CPUID registers to userspace Alex Bennée
2018-06-28 14:23 ` Peter Maydell
2018-06-25 16:00 ` [Qemu-devel] [PATCH v3 4/5] linux-user/elfload: enable HWCAP_CPUID for AArch64 Alex Bennée
2018-06-27 5:27 ` Richard Henderson
2018-06-25 16:00 ` [Qemu-devel] [PATCH v3 5/5] tests/tcg/aarch64: userspace system register test Alex Bennée
2018-06-25 20:51 ` Alex Bennée
2018-06-27 5:38 ` Richard Henderson
2018-06-28 15:06 ` [Qemu-devel] [PATCH v3 0/5] support reading some CPUID/CNT registers from user-space Peter Maydell
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