arm: fpu: Fix the input/output args for inline asm in fpu.c

The macros fpu_reg_{read,write} post-increment the '__val'
pointer register as a part of 'stp' and 'ldp' instructions.
As a result, mark i

arm: fpu: Fix the input/output args for inline asm in fpu.c

The macros fpu_reg_{read,write} post-increment the '__val'
pointer register as a part of 'stp' and 'ldp' instructions.
As a result, mark it with "+r" for the compiler to treat it
as read-write operand.

On the contrary, sve_reg_read() never updates the value of the
pointer/register. Hence, mark this as "r" for the compiler to
treat it as read-only operand.

Without these adjustments, the compiler can potentially perform
optimizations over the registers holding the pointers that could
lead to data aborts.

Fixes: d47d370c8f ("arm: Add test for FPU/SIMD context save/restore")
Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
Signed-off-by: Andrew Jones <andrew.jones@linux.dev>

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arm: fpu: Add '.arch_extension fp' to fpu macros

Since the tests are built with '-mgeneral-regs-only', clang-18 tends to
push 'q' registers out of the scope and hence, the following error is
observe

arm: fpu: Add '.arch_extension fp' to fpu macros

Since the tests are built with '-mgeneral-regs-only', clang-18 tends to
push 'q' registers out of the scope and hence, the following error is
observed:

arm/fpu.c:281:3: error: instruction requires: fp-armv8
281 | fpu_reg_write(*indata);
| ^
arm/fpu.c:74:15: note: expanded from macro 'fpu_reg_write'
74 | asm volatile("ldp q0, q1, [%0], #32\n\t" \
| ^
<inline asm>:1:2: note: instantiated into assembly here
1 | ldp q0, q1, [x8], #32
| ^

Hence, explicitly add fp support where these registers are used.

Reported-by: Andrew Jones <andrew.jones@linux.dev>
Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
Signed-off-by: Andrew Jones <andrew.jones@linux.dev>

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arm: fpu: Convert 'q' registers to 'v' to satisfy clang

Clang doesn't seem to support 'q' register notation in the clobbered
list, and hence throws the following error:

arm/fpu.c:235:3: error: unkn

arm: fpu: Convert 'q' registers to 'v' to satisfy clang

Clang doesn't seem to support 'q' register notation in the clobbered
list, and hence throws the following error:

arm/fpu.c:235:3: error: unknown register name 'q0' in asm
fpu_reg_read(outdata);
^
arm/fpu.c:59:10: note: expanded from macro 'fpu_reg_read'
: "q0", "q1", "q2", "q3", \
^
arm/fpu.c:281:3: error: unknown register name 'q0' in asm
fpu_reg_write(*indata);
^
arm/fpu.c:92:10: note: expanded from macro 'fpu_reg_write'
: "q0", "q1", "q2", "q3", \
^
2 errors generated.

Hence, replace 'q' with 'v' registers for the clobbered list.

Fixes: d47d370c8f ("arm: Add test for FPU/SIMD context save/restore")
Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
Signed-off-by: Andrew Jones <andrew.jones@linux.dev>

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Merge branch 'misc/queue' into 'master'

gitlab-ci fixes and improvements

See merge request kvm-unit-tests/kvm-unit-tests!64

arm: Fix kerneldoc

Some invalid kerneldoc comments crept in while centos ci job was down.

Cc: Subhasish Ghosh <subhasish.ghosh@arm.com>
Cc: Joey Gouly <joey.gouly@arm.com>
Cc: Suzuki K Poulose <suz

arm: Fix kerneldoc

Some invalid kerneldoc comments crept in while centos ci job was down.

Cc: Subhasish Ghosh <subhasish.ghosh@arm.com>
Cc: Joey Gouly <joey.gouly@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Fixes: d47d370c8f ("arm: Add test for FPU/SIMD context save/restore")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Andrew Jones <andrew.jones@linux.dev>
Signed-off-by: Andrew Jones <andrew.jones@linux.dev>

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Merge branch 'arm/queue' into 'master'

arm/arm64: LPA2 support and fpu/sve s/r test

See merge request kvm-unit-tests/kvm-unit-tests!61

arm: Add test for FPU/SIMD context save/restore

Test that the FPU/SIMD registers are saved and restored correctly when
context switching CPUs.

In order to test fpu/simd functionality, we need to ma

arm: Add test for FPU/SIMD context save/restore

Test that the FPU/SIMD registers are saved and restored correctly when
context switching CPUs.

In order to test fpu/simd functionality, we need to make sure that
kvm-unit-tests doesn't generate code that uses the fpu registers, as that
might interfere with the test results. Thus make sure we compile the tests
with -mgeneral-regs-only.

Signed-off-by: Subhasish Ghosh <subhasish.ghosh@arm.com>
[ Added SVE register tests ]
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
[Removed references to realms.]
Signed-off-by: Andrew Jones <andrew.jones@linux.dev>

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