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Re: [PATCHv5 00/19] ARMv8.4-A Secure EL2

From: Peter Maydell
Subject: Re: [PATCHv5 00/19] ARMv8.4-A Secure EL2
Date: Tue, 19 Jan 2021 11:13:13 +0000

On Tue, 12 Jan 2021 at 10:59, Rémi Denis-Courmont
<remi.denis.courmont@huawei.com> wrote:
>         Hi,
> This adds Secure  EL2.
> Changes since version 4:
> - Fix NS unitialised in secure state stage 2 translation.
> - Remove EEL2 translation block flag in 32-bit mode.
> - Clarify comments on arm_is_el2_enabled().

Looking through this patchset, it's practically ready and only
needs a couple of very tiny tweaks, so rather than asking you to
roll a v6, I'm just going to apply it to target-arm.next and
make the tweaks in the process:

 * patch 6 needed adjustment on rebase as commit 00a92832f4532
   has already added definitions of the ID_AA64PFR0 fields;
   I dropped the now-duplicate part of the patch and adjusted
   the commit message to match

 * patch 17: added the change requested by RTH:
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -2837,7 +2837,8 @@ static bool
msr_banked_access_decode(DisasContext *s, int r, int sysm, int rn,
             TCGv_i32 tcg_el;

-            if (dc_isar_feature(aa64_sel2, s)) {
+            if (arm_dc_feature(s, ARM_FEATURE_AARCH64) &&
+                dc_isar_feature(aa64_sel2, s)) {
                 /* Target EL is EL<3 minus SCR_EL3.EEL2> */
                 tcg_el = load_cpu_field(cp15.scr_el3);
                 tcg_gen_sextract_i32(tcg_el, tcg_el, ctz32(SCR_EEL2), 1);

    and corrected the patch subject line to
    "target/arm: Implement SCR_EL2.EEL2"

-- PMM

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