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[PULL 06/37] target/arm/cpu: Introduce sve_vq_supported bitmap
From: |
Peter Maydell |
Subject: |
[PULL 06/37] target/arm/cpu: Introduce sve_vq_supported bitmap |
Date: |
Thu, 26 Aug 2021 18:02:36 +0100 |
From: Andrew Jones <drjones@redhat.com>
Allow CPUs that support SVE to specify which SVE vector lengths they
support by setting them in this bitmap. Currently only the 'max' and
'host' CPU types supports SVE and 'host' requires KVM which obtains
its supported bitmap from the host. So, we only need to initialize the
bitmap for 'max' with TCG. And, since 'max' should support all SVE
vector lengths we simply fill the bitmap. Future CPU types may have
less trivial maps though.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210823160647.34028-2-drjones@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
target/arm/cpu.h | 4 ++++
target/arm/cpu64.c | 2 ++
2 files changed, 6 insertions(+)
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 5cf8996ae3c..1060825c746 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1020,9 +1020,13 @@ struct ARMCPU {
* While processing properties during initialization, corresponding
* sve_vq_init bits are set for bits in sve_vq_map that have been
* set by properties.
+ *
+ * Bits set in sve_vq_supported represent valid vector lengths for
+ * the CPU type.
*/
DECLARE_BITMAP(sve_vq_map, ARM_MAX_VQ);
DECLARE_BITMAP(sve_vq_init, ARM_MAX_VQ);
+ DECLARE_BITMAP(sve_vq_supported, ARM_MAX_VQ);
/* Generic timer counter frequency, in Hz */
uint64_t gt_cntfrq_hz;
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
index c690318a9b6..eb9318c83b7 100644
--- a/target/arm/cpu64.c
+++ b/target/arm/cpu64.c
@@ -840,6 +840,8 @@ static void aarch64_max_initfn(Object *obj)
/* Default to PAUTH on, with the architected algorithm. */
qdev_property_add_static(DEVICE(obj), &arm_cpu_pauth_property);
qdev_property_add_static(DEVICE(obj), &arm_cpu_pauth_impdef_property);
+
+ bitmap_fill(cpu->sve_vq_supported, ARM_MAX_VQ);
}
aarch64_add_sve_properties(obj);
--
2.20.1
- [PULL 00/37] target-arm queue, Peter Maydell, 2021/08/26
- [PULL 02/37] hw/dma/xlnx_csu_dma: Run trivial checks early in realize(), Peter Maydell, 2021/08/26
- [PULL 01/37] hw/arm/xlnx-zynqmp: Realize qspi controller *after* qspi_dma, Peter Maydell, 2021/08/26
- [PULL 03/37] hw/dma/xlnx_csu_dma: Always expect 'dma' link property to be set, Peter Maydell, 2021/08/26
- [PULL 05/37] hw/arm/Kconfig: no need to enable ACPI_MEMORY_HOTPLUG/ACPI_NVDIMM explicitly, Peter Maydell, 2021/08/26
- [PULL 07/37] target/arm/kvm64: Ensure sve vls map is completely clear, Peter Maydell, 2021/08/26
- [PULL 04/37] hw/dma/xlnx-zdma Always expect 'dma' link property to be set, Peter Maydell, 2021/08/26
- [PULL 08/37] target/arm/cpu64: Replace kvm_supported with sve_vq_supported, Peter Maydell, 2021/08/26
- [PULL 06/37] target/arm/cpu: Introduce sve_vq_supported bitmap,
Peter Maydell <=
- [PULL 09/37] target/arm/cpu64: Validate sve vector lengths are supported, Peter Maydell, 2021/08/26
- [PULL 10/37] docs/specs/acpu_cpu_hotplug: Convert to rST, Peter Maydell, 2021/08/26
- [PULL 15/37] softmmu: Use accel_find("xen") instead of xen_available(), Peter Maydell, 2021/08/26
- [PULL 12/37] docs/specs/acpi_pci_hotplug: Convert to rST, Peter Maydell, 2021/08/26
- [PULL 14/37] MAINTAINERS: Add ACPI specs documents to ACPI and NVDIMM sections, Peter Maydell, 2021/08/26
- [PULL 13/37] docs/specs/acpi_nvdimm: Convert to rST, Peter Maydell, 2021/08/26
- [PULL 11/37] docs/specs/acpi_mem_hotplug: Convert to rST, Peter Maydell, 2021/08/26
- [PULL 16/37] monitor: Use accel_find("kvm") instead of kvm_available(), Peter Maydell, 2021/08/26
- [PULL 17/37] softmmu/arch_init.c: Trim down include list, Peter Maydell, 2021/08/26
- [PULL 19/37] arch_init.h: Add QEMU_ARCH_HEXAGON, Peter Maydell, 2021/08/26