linux-kernel - [kvm-unit-tests PATCH v2 2/4] arm: fpu: Convert 'q' registers to 'v' to satisfy clang

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Message-ID: <20241023152638.3317648-3-rananta@google.com>
Date: Wed, 23 Oct 2024 15:26:36 +0000
From: Raghavendra Rao Ananta <rananta@...gle.com>
To: Subhasish Ghosh <subhasish.ghosh@....com>, Joey Gouly <joey.gouly@....com>, 
	Andrew Jones <andrew.jones@...ux.dev>
Cc: Oliver Upton <oliver.upton@...ux.dev>, Marc Zyngier <maz@...nel.org>, 
	Raghavendra Rao Anata <rananta@...gle.com>, linux-arm-kernel@...ts.infradead.org, 
	kvmarm@...ts.linux.dev, linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: [kvm-unit-tests PATCH v2 2/4] 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@...gle.com>
---
 arm/fpu.c | 40 ++++++++++++++++++++--------------------
 1 file changed, 20 insertions(+), 20 deletions(-)

diff --git a/arm/fpu.c b/arm/fpu.c
index edbd9a94..587b6ea3 100644
--- a/arm/fpu.c
+++ b/arm/fpu.c
@@ -56,16 +56,16 @@ static inline bool arch_collect_entropy(uint64_t *random)
 		     "stp q30, q31, [%0], #32\n\t"	\
 		     : "=r" (__val)			\
 		     :					\
-		     : "q0", "q1", "q2", "q3",		\
-			"q4", "q5", "q6", "q7",		\
-			"q8", "q9", "q10", "q11",	\
-			"q12", "q13", "q14",		\
-			"q15", "q16", "q17",		\
-			"q18", "q19", "q20",		\
-			"q21", "q22", "q23",		\
-			"q24", "q25", "q26",		\
-			"q27", "q28", "q29",		\
-			"q30", "q31", "memory");	\
+		     : "v0", "v1", "v2", "v3",		\
+			"v4", "v5", "v6", "v7",		\
+			"v8", "v9", "v10", "v11",	\
+			"v12", "v13", "v14",		\
+			"v15", "v16", "v17",		\
+			"v18", "v19", "v20",		\
+			"v21", "v22", "v23",		\
+			"v24", "v25", "v26",		\
+			"v27", "v28", "v29",		\
+			"v30", "v31", "memory");	\
 })
 
 #define fpu_reg_write(val)				\
@@ -89,16 +89,16 @@ do {							\
 		     "ldp q30, q31, [%0], #32\n\t"	\
 		     :					\
 		     : "r" (__val)			\
-		     : "q0", "q1", "q2", "q3",		\
-			"q4", "q5", "q6", "q7",		\
-			"q8", "q9", "q10", "q11",	\
-			"q12", "q13", "q14",		\
-			"q15", "q16", "q17",		\
-			"q18", "q19", "q20",		\
-			"q21", "q22", "q23",		\
-			"q24", "q25", "q26",		\
-			"q27", "q28", "q29",		\
-			"q30", "q31", "memory");	\
+		     : "v0", "v1", "v2", "v3",		\
+			"v4", "v5", "v6", "v7",		\
+			"v8", "v9", "v10", "v11",	\
+			"v12", "v13", "v14",		\
+			"v15", "v16", "v17",		\
+			"v18", "v19", "v20",		\
+			"v21", "v22", "v23",		\
+			"v24", "v25", "v26",		\
+			"v27", "v28", "v29",		\
+			"v30", "v31", "memory");	\
 } while (0)
 
 #ifdef CC_HAS_SVE
-- 
2.47.0.105.g07ac214952-goog