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From: Andrew Jones <drjones@redhat.com>
To: qemu-devel@nongnu.org, qemu-arm@nongnu.org
Cc: peter.maydell@linaro.org, richard.henderson@linaro.org,
	armbru@redhat.com, eric.auger@redhat.com, imammedo@redhat.com,
	alex.bennee@linaro.org, Dave.Martin@arm.com
Subject: [Qemu-devel] [PATCH v3 05/15] target/arm/helper: zcr: Add build bug next to value range assumption
Date: Fri,  2 Aug 2019 14:25:30 +0200	[thread overview]
Message-ID: <20190802122540.26385-6-drjones@redhat.com> (raw)
In-Reply-To: <20190802122540.26385-1-drjones@redhat.com>

The current implementation of ZCR_ELx matches the architecture, only
implementing the lower four bits, with the rest RAZ/WI. This puts
a strict limit on ARM_MAX_VQ of 16. Make sure we don't let ARM_MAX_VQ
grow without a corresponding update here.

Suggested-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
---
 target/arm/helper.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index b74c23a9bc08..3064067c69a6 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -5300,6 +5300,7 @@ static void zcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
     int new_len;
 
     /* Bits other than [3:0] are RAZ/WI.  */
+    QEMU_BUILD_BUG_ON(ARM_MAX_VQ > 16);
     raw_write(env, ri, value & 0xf);
 
     /*
-- 
2.20.1



  parent reply	other threads:[~2019-08-02 12:28 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-02 12:25 [Qemu-devel] [PATCH v3 00/15] target/arm/kvm: enable SVE in guests Andrew Jones
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 01/15] target/arm/cpu64: Ensure kvm really supports aarch64=off Andrew Jones
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 02/15] target/arm/cpu: Ensure we can use the pmu with kvm Andrew Jones
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 03/15] target/arm/monitor: Introduce qmp_query_cpu_model_expansion Andrew Jones
2019-08-02 16:27   ` Richard Henderson
2019-08-03  1:28     ` Richard Henderson
2019-08-06 12:21       ` Andrew Jones
2019-08-07 15:22         ` Richard Henderson
2019-08-08  8:50           ` Andrew Jones
2019-08-08 18:37             ` Richard Henderson
2019-08-09 16:09               ` Andrew Jones
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 04/15] tests: arm: Introduce cpu feature tests Andrew Jones
2019-08-02 12:25 ` Andrew Jones [this message]
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 06/15] target/arm/cpu: Use div-round-up to determine predicate register array size Andrew Jones
2019-08-02 16:33   ` Richard Henderson
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 07/15] target/arm: Allow SVE to be disabled via a CPU property Andrew Jones
2019-08-02 16:35   ` Richard Henderson
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 08/15] target/arm/cpu64: max cpu: Introduce sve<vl-bits> properties Andrew Jones
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 09/15] target/arm/kvm64: Fix error returns Andrew Jones
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 10/15] target/arm/kvm64: Move the get/put of fpsimd registers out Andrew Jones
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 11/15] target/arm/kvm64: Add kvm_arch_get/put_sve Andrew Jones
2019-08-02 18:07   ` Richard Henderson
2019-08-06 12:24     ` Andrew Jones
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 12/15] target/arm/kvm64: max cpu: Enable SVE when available Andrew Jones
2019-08-02 18:20   ` Richard Henderson
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 13/15] target/arm/kvm: scratch vcpu: Preserve input kvm_vcpu_init features Andrew Jones
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 14/15] target/arm/cpu64: max cpu: Support sve properties with KVM Andrew Jones
2019-08-02 12:25 ` [Qemu-devel] [PATCH v3 15/15] target/arm/kvm: host cpu: Add support for sve<vl-bits> properties Andrew Jones
2019-08-10  1:31 ` [Qemu-devel] [PATCH] HACK: Centralize sve property checks Richard Henderson
2019-09-04  8:32   ` Andrew Jones
2019-09-04 17:17     ` Richard Henderson
2019-09-04 17:18     ` Richard Henderson
2019-08-15  8:31 ` [Qemu-devel] [PATCH v3 00/15] target/arm/kvm: enable SVE in guests Peter Maydell
2019-08-15  8:45   ` Andrew Jones

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