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Re: [PATCH v2 3/3] target/arm: Set ID_PFR2.SSBS to 1 for "max" 32-bit CP


From: Rebecca Cran
Subject: Re: [PATCH v2 3/3] target/arm: Set ID_PFR2.SSBS to 1 for "max" 32-bit CPU
Date: Fri, 5 Mar 2021 08:23:16 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1

On 3/5/21 4:31 AM, Peter Maydell wrote:
On Tue, 16 Feb 2021 at 22:45, Rebecca Cran <rebecca@nuviainc.com> wrote:

Enable FEAT_SSBS for the "max" 32-bit CPU.

Signed-off-by: Rebecca Cran <rebecca@nuviainc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
  target/arm/cpu.c | 4 ++++
  1 file changed, 4 insertions(+)

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 5cf6c056c50f..88a6b183d325 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -2206,6 +2206,10 @@ static void arm_max_initfn(Object *obj)
          t = cpu->isar.id_pfr0;
          t = FIELD_DP32(t, ID_PFR0, DIT, 1);
          cpu->isar.id_pfr0 = t;
+
+        t = cpu->isar.id_pfr2;
+        t = FIELD_DP32(t, ID_PFR2, SSBS, 1);
+        cpu->isar.id_mfr2 = t;

Er, this doesn't compile:

../../target/arm/cpu.c:2223:19: error: no member named 'id_mfr2' in
'struct ARMISARegisters'
         cpu->isar.id_mfr2 = t;
         ~~~~~~~~~ ^

The typo is obvious, so I'm just going to fix it up in the
target-arm queue, but this does suggest that your testing process
before sending out patches could be improved ;-)

Thanks, and sorry for the mistake. I'll work on improving my testing of 32-bit ARM targets when I'm making changes to them.

--
Rebecca Cran



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