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Author SHA1 Message Date
Richard HendersonandPeter Maydell d0e16dcad9 linux-user/aarch64: Implement prctls for GCS 
This is PR_GET_SHADOW_STACK_STATUS, PR_SET_SHADOW_STACK_STATUS,
and PR_LOCK_SHADOW_STACK_STATUS.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-64-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 9c5dfe8b56 target/arm: Enable FEAT_GCS with -cpu max 
Tested-by: Thiago Jung Bauermann <thiago.bauermann@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20251008215613.300150-63-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 70440a5858 target/arm: Implement EXLOCK check during exception return 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-62-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell d77ed96016 target/arm: Copy EXLOCKEn to EXLOCK on exception to the same EL 
Per R_WTXBY, PSTATE.EXLOCK is 0 on an exception to a higher EL,
and copied from EXLOCKEn otherwise.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-61-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 3d366bb67f target/arm: Load gcs record for RET with PAuth 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-60-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 488fab6fc9 target/arm: Load gcs record for RET 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-59-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell d28bb06dc8 target/arm: Add gcs record for BLR with PAuth 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-58-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 978bad65f8 target/arm: Add gcs record for BLR 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-57-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell a664ba1fc6 target/arm: Add gcs record for BL 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-56-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell e85fc2c623 target/arm: Implement GCSSS2 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-55-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 22d20e3804 target/arm: Implement GCSSS1 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-54-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell a94b6aab8e target/arm: Implement GCSPOPCX 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-53-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 75c8d645b9 target/arm: Implement GCSPOPX 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-52-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 6fb1678f90 target/arm: Implement GCSPUSHX 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-51-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 0982f58db6 target/arm: Implement GCSPOPM 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-50-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 3afe6037e7 target/arm: Implement GCSPUSHM 
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-49-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell d383c43d6d target/arm: Implement GCSB 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-48-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 6a5596bad3 target/arm: Implement GCSSTR, GCSSTTR 
Note that CreateAccDescGCS() does not enable tagchecked,
and Data Aborts from GCS instructions do not set iss.isv.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-47-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 0e15a9a53c target/arm: Emit v7m LTPSIZE exception out of line 
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-46-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 923e7c432e target/arm: Emit HSTR trap exception out of line 
Use delay_exception_el to move the exception out of line.
Use TCG_COND_TSTNE instead of separate AND+NE.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-45-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 609f5d7692 target/arm: Introduce delay_exception{_el} 
Add infrastructure to raise an exception out of line.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-44-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 49b49214f3 target/arm: Split {full,core}_a64_user_mem_index 
Separate get_a64_user_mem_index into two separate functions, one which
returns the full ARMMMUIdx and one which returns the core mmu_idx.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20251008215613.300150-43-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:10 +01:00
Richard HendersonandPeter Maydell 766c99beab target/arm: Implement EXLOCKException for ELR_ELx and SPSR_ELx 
If PSTATE.EXLOCK is set, and the GCS EXLOCK enable bit is set,
and nested virt is in the appropriate state, then we need to
raise an EXLOCK exception.

Since PSTATE.EXLOCK cannot be set without GCS being present
and enabled, no explicit check for GCS is required.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-42-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:09 +01:00
Richard HendersonandPeter Maydell 399d40b985 target/arm: Split out access_nv1_with_nvx 
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20251008215613.300150-41-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:09 +01:00
Richard HendersonandPeter Maydell 3a6a957b89 target/arm: Use arm_hcr_el2_nvx_eff in access_nv1 
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20251008215613.300150-40-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2025-10-10 13:19:09 +01:00