From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Subject: Re: [PATCH 08/10] target/arm: HCR_EL2.RW should be RAO/WI if EL1 doesn't support AArch32
Date: Thu, 6 Mar 2025 15:01:46 -0800 [thread overview]
Message-ID: <f3e37fee-405b-40a1-b975-153c44d2e049@linaro.org> (raw)
In-Reply-To: <20250306163925.2940297-9-peter.maydell@linaro.org>
On 3/6/25 08:39, Peter Maydell wrote:
> When EL1 doesn't support AArch32, the HCR_EL2.RW bit is supposed to
> be RAO/WI. We don't enforce this. This isn't a problem yet because
> at the moment all of our CPU types with AArch64 support AArch32 at
> all exception levels, but in the future this is likely to no longer
> be true. Enforce the RAO/WI behaviour.
>
> Note that we handle "reset value should honour RES1 bits" in the same
> way that SCR_EL3 does, via a reset function.
>
> Signed-off-by: Peter Maydell<peter.maydell@linaro.org>
> ---
> target/arm/helper.c | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
next prev parent reply other threads:[~2025-03-06 23:02 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-06 16:39 From ce9a42483c23c32cee233f648101a160b6604b45 Mon Sep 17 00:00:00 2001 Peter Maydell
2025-03-06 16:39 ` [PATCH 01/10] target/arm: Move A32_BANKED_REG_{GET, SET} macros to cpregs.h Peter Maydell
2025-03-06 22:09 ` Richard Henderson
2025-03-06 16:39 ` [PATCH 02/10] target/arm: Un-inline access_secure_reg() Peter Maydell
2025-03-06 22:09 ` Richard Henderson
2025-03-06 16:39 ` [PATCH 03/10] linux-user/aarch64: Remove unused get/put_user macros Peter Maydell
2025-03-06 22:09 ` Richard Henderson
2025-03-06 16:39 ` [PATCH 04/10] linux-user/arm: Remove unused get_put_user macros Peter Maydell
2025-03-06 22:09 ` Richard Henderson
2025-03-06 16:39 ` [PATCH 05/10] target/arm: Move arm_cpu_data_is_big_endian() etc to internals.h Peter Maydell
2025-03-06 22:12 ` Richard Henderson
2025-03-07 9:37 ` Peter Maydell
2025-03-06 16:39 ` [PATCH 06/10] target/arm: Move arm_current_el() and arm_el_is_aa64() " Peter Maydell
2025-03-06 22:40 ` Richard Henderson
2025-03-06 16:39 ` [PATCH 07/10] target/arm: SCR_EL3.RW should be treated as 1 if EL2 doesn't support AArch32 Peter Maydell
2025-03-06 17:12 ` Peter Maydell
2025-03-06 22:53 ` Richard Henderson
2025-03-07 9:39 ` Peter Maydell
2025-03-06 16:39 ` [PATCH 08/10] target/arm: HCR_EL2.RW should be RAO/WI if EL1 " Peter Maydell
2025-03-06 23:01 ` Richard Henderson [this message]
2025-03-06 16:39 ` [PATCH 09/10] target/arm: Add cpu local variable to exception_return helper Peter Maydell
2025-03-06 23:02 ` Richard Henderson
2025-03-06 16:39 ` [PATCH 10/10] target/arm: Forbid return to AArch32 when CPU is AArch64-only Peter Maydell
2025-03-06 23:16 ` Richard Henderson
2025-03-13 16:19 ` Peter Maydell
2025-03-06 16:41 ` [PATCH 00/10] target/arm: Forbid exception returns to unimplemented AArch32 ELs Peter Maydell
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