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target/arm: Remove deprecated pxa CPU family

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In 10.0 we deprecated the pxa CPU family (pxa250, pxa255, pxa260
pxa261, pxa262, pxa270-a0, pxa270-a1, pxa270, pxa270-b0, pxa270-b1,
pxa270-c0, pxa270-c5).  Now we have released 10.1 we can remove them.

This commit removes only the top level CPU definitions and updates
the documentation. Removing the CPUs means that there is now a lot
of dead iwMMXt code, which we will delete in subsequent commits.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250828140422.3271703-2-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell
2025-09-16 17:31:53 +01:00
parent cc2c5027dc
commit 5b3764d9e3
3 changed files with 14 additions and 184 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/about/deprecated.rst
-21
View File
@@ -236,27 +236,6 @@ Keeping 32-bit host support alive is a substantial burden for the
QEMU project. Thus QEMU will in future drop the support for all
32-bit host systems.
linux-user mode CPUs
--------------------
iwMMXt emulation and the ``pxa`` CPUs (since 10.0)
''''''''''''''''''''''''''''''''''''''''''''''''''
The ``pxa`` CPU family (``pxa250``, ``pxa255``, ``pxa260``,
``pxa261``, ``pxa262``, ``pxa270-a0``, ``pxa270-a1``, ``pxa270``,
``pxa270-b0``, ``pxa270-b1``, ``pxa270-c0``, ``pxa270-c5``) are no
longer used in system emulation, because all the machine types which
used these CPUs were removed in the QEMU 9.2 release. These CPUs can
now only be used in linux-user mode, and to do that you would have to
explicitly select one of these CPUs with the ``-cpu`` command line
option or the ``QEMU_CPU`` environment variable.
We don't believe that anybody is using the iwMMXt emulation, and we do
not have any tests to validate it or any real hardware or similar
known-good implementation to test against. GCC is in the process of
dropping their support for iwMMXt codegen. These CPU types are
therefore deprecated in QEMU, and will be removed in a future release.
System emulator CPUs
--------------------
docs/about/removed-features.rst
+14
View File
@@ -1138,6 +1138,20 @@ reason the maintainers strongly suspected no one actually used it.
QEMU Nios II architecture was orphan; Intel has EOL'ed the Nios II
processor IP (see `Intel discontinuance notification`_).
iwMMXt emulation and the ``pxa`` CPUs (removed in 10.2)
'''''''''''''''''''''''''''''''''''''''''''''''''''''''
The ``pxa`` CPU family (``pxa250``, ``pxa255``, ``pxa260``,
``pxa261``, ``pxa262``, ``pxa270-a0``, ``pxa270-a1``, ``pxa270``,
``pxa270-b0``, ``pxa270-b1``, ``pxa270-c0``, ``pxa270-c5``) were
not available in system emulation, because all the machine types which
used these CPUs were removed in the QEMU 9.2 release. We don't
believe that anybody was using the iwMMXt emulation (which you
would have to explicitly enable on the command line), and we did
not have any tests to validate it or any real hardware or similar
known-good implementation to test against. These CPUs have
therefore been removed in linux-user mode as well.
TCG introspection features
--------------------------
target/arm/tcg/cpu32.c
-163
View File
@@ -807,144 +807,6 @@ static void sa1110_initfn(Object *obj)
cpu->reset_sctlr = 0x00000070;
}
static void pxa250_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
cpu->dtb_compatible = "marvell,xscale";
set_feature(&cpu->env, ARM_FEATURE_V5);
set_feature(&cpu->env, ARM_FEATURE_XSCALE);
cpu->midr = 0x69052100;
cpu->ctr = 0xd172172;
cpu->reset_sctlr = 0x00000078;
}
static void pxa255_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
cpu->dtb_compatible = "marvell,xscale";
set_feature(&cpu->env, ARM_FEATURE_V5);
set_feature(&cpu->env, ARM_FEATURE_XSCALE);
cpu->midr = 0x69052d00;
cpu->ctr = 0xd172172;
cpu->reset_sctlr = 0x00000078;
}
static void pxa260_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
cpu->dtb_compatible = "marvell,xscale";
set_feature(&cpu->env, ARM_FEATURE_V5);
set_feature(&cpu->env, ARM_FEATURE_XSCALE);
cpu->midr = 0x69052903;
cpu->ctr = 0xd172172;
cpu->reset_sctlr = 0x00000078;
}
static void pxa261_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
cpu->dtb_compatible = "marvell,xscale";
set_feature(&cpu->env, ARM_FEATURE_V5);
set_feature(&cpu->env, ARM_FEATURE_XSCALE);
cpu->midr = 0x69052d05;
cpu->ctr = 0xd172172;
cpu->reset_sctlr = 0x00000078;
}
static void pxa262_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
cpu->dtb_compatible = "marvell,xscale";
set_feature(&cpu->env, ARM_FEATURE_V5);
set_feature(&cpu->env, ARM_FEATURE_XSCALE);
cpu->midr = 0x69052d06;
cpu->ctr = 0xd172172;
cpu->reset_sctlr = 0x00000078;
}
static void pxa270a0_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
cpu->dtb_compatible = "marvell,xscale";
set_feature(&cpu->env, ARM_FEATURE_V5);
set_feature(&cpu->env, ARM_FEATURE_XSCALE);
set_feature(&cpu->env, ARM_FEATURE_IWMMXT);
cpu->midr = 0x69054110;
cpu->ctr = 0xd172172;
cpu->reset_sctlr = 0x00000078;
}
static void pxa270a1_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
cpu->dtb_compatible = "marvell,xscale";
set_feature(&cpu->env, ARM_FEATURE_V5);
set_feature(&cpu->env, ARM_FEATURE_XSCALE);
set_feature(&cpu->env, ARM_FEATURE_IWMMXT);
cpu->midr = 0x69054111;
cpu->ctr = 0xd172172;
cpu->reset_sctlr = 0x00000078;
}
static void pxa270b0_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
cpu->dtb_compatible = "marvell,xscale";
set_feature(&cpu->env, ARM_FEATURE_V5);
set_feature(&cpu->env, ARM_FEATURE_XSCALE);
set_feature(&cpu->env, ARM_FEATURE_IWMMXT);
cpu->midr = 0x69054112;
cpu->ctr = 0xd172172;
cpu->reset_sctlr = 0x00000078;
}
static void pxa270b1_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
cpu->dtb_compatible = "marvell,xscale";
set_feature(&cpu->env, ARM_FEATURE_V5);
set_feature(&cpu->env, ARM_FEATURE_XSCALE);
set_feature(&cpu->env, ARM_FEATURE_IWMMXT);
cpu->midr = 0x69054113;
cpu->ctr = 0xd172172;
cpu->reset_sctlr = 0x00000078;
}
static void pxa270c0_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
cpu->dtb_compatible = "marvell,xscale";
set_feature(&cpu->env, ARM_FEATURE_V5);
set_feature(&cpu->env, ARM_FEATURE_XSCALE);
set_feature(&cpu->env, ARM_FEATURE_IWMMXT);
cpu->midr = 0x69054114;
cpu->ctr = 0xd172172;
cpu->reset_sctlr = 0x00000078;
}
static void pxa270c5_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
cpu->dtb_compatible = "marvell,xscale";
set_feature(&cpu->env, ARM_FEATURE_V5);
set_feature(&cpu->env, ARM_FEATURE_XSCALE);
set_feature(&cpu->env, ARM_FEATURE_IWMMXT);
cpu->midr = 0x69054117;
cpu->ctr = 0xd172172;
cpu->reset_sctlr = 0x00000078;
}
#ifndef TARGET_AARCH64
/*
* -cpu max: a CPU with as many features enabled as our emulation supports.
@@ -1032,31 +894,6 @@ static const ARMCPUInfo arm_tcg_cpus[] = {
{ .name = "ti925t", .initfn = ti925t_initfn },
{ .name = "sa1100", .initfn = sa1100_initfn },
{ .name = "sa1110", .initfn = sa1110_initfn },
{ .name = "pxa250", .initfn = pxa250_initfn,
.deprecation_note = "iwMMXt CPUs are no longer supported", },
{ .name = "pxa255", .initfn = pxa255_initfn,
.deprecation_note = "iwMMXt CPUs are no longer supported", },
{ .name = "pxa260", .initfn = pxa260_initfn,
.deprecation_note = "iwMMXt CPUs are no longer supported", },
{ .name = "pxa261", .initfn = pxa261_initfn,
.deprecation_note = "iwMMXt CPUs are no longer supported", },
{ .name = "pxa262", .initfn = pxa262_initfn,
.deprecation_note = "iwMMXt CPUs are no longer supported", },
/* "pxa270" is an alias for "pxa270-a0" */
{ .name = "pxa270", .initfn = pxa270a0_initfn,
.deprecation_note = "iwMMXt CPUs are no longer supported", },
{ .name = "pxa270-a0", .initfn = pxa270a0_initfn,
.deprecation_note = "iwMMXt CPUs are no longer supported", },
{ .name = "pxa270-a1", .initfn = pxa270a1_initfn,
.deprecation_note = "iwMMXt CPUs are no longer supported", },
{ .name = "pxa270-b0", .initfn = pxa270b0_initfn,
.deprecation_note = "iwMMXt CPUs are no longer supported", },
{ .name = "pxa270-b1", .initfn = pxa270b1_initfn,
.deprecation_note = "iwMMXt CPUs are no longer supported", },
{ .name = "pxa270-c0", .initfn = pxa270c0_initfn,
.deprecation_note = "iwMMXt CPUs are no longer supported", },
{ .name = "pxa270-c5", .initfn = pxa270c5_initfn,
.deprecation_note = "iwMMXt CPUs are no longer supported", },
#ifndef TARGET_AARCH64
{ .name = "max", .initfn = arm_max_initfn },
#endif