selftests/powerpc: Add ptrace tests for VSX, VMX registers

This patch adds ptrace interface test for VSX, VMX registers.
This also adds ptrace interface based helper functions related
to VSX, VMX registers access. This also adds some assembly
helper functions related to VSX and VMX registers.

Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 119 insertions, 0 deletions

diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace.h b/tools/testing/selftests/powerpc/ptrace/ptrace.h
index fee71b8c1e75..9aa0498ac738 100644
--- a/tools/testing/selftests/powerpc/ptrace/ptrace.h
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace.h
@@ -486,6 +486,125 @@ int write_ckpt_gpr(pid_t child, unsigned long val)
 	return TEST_PASS;
 }
 
+/* VMX */
+int show_vmx(pid_t child, unsigned long vmx[][2])
+{
+	int ret;
+
+	ret = ptrace(PTRACE_GETVRREGS, child, 0, vmx);
+	if (ret) {
+		perror("ptrace(PTRACE_GETVRREGS) failed");
+		return TEST_FAIL;
+	}
+	return TEST_PASS;
+}
+
+int show_vmx_ckpt(pid_t child, unsigned long vmx[][2])
+{
+	unsigned long regs[34][2];
+	struct iovec iov;
+	int ret;
+
+	iov.iov_base = (u64 *) regs;
+	iov.iov_len = sizeof(regs);
+	ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CVMX, &iov);
+	if (ret) {
+		perror("ptrace(PTRACE_GETREGSET, NT_PPC_TM_CVMX) failed");
+		return TEST_FAIL;
+	}
+	memcpy(vmx, regs, sizeof(regs));
+	return TEST_PASS;
+}
+
+
+int write_vmx(pid_t child, unsigned long vmx[][2])
+{
+	int ret;
+
+	ret = ptrace(PTRACE_SETVRREGS, child, 0, vmx);
+	if (ret) {
+		perror("ptrace(PTRACE_SETVRREGS) failed");
+		return TEST_FAIL;
+	}
+	return TEST_PASS;
+}
+
+int write_vmx_ckpt(pid_t child, unsigned long vmx[][2])
+{
+	unsigned long regs[34][2];
+	struct iovec iov;
+	int ret;
+
+	memcpy(regs, vmx, sizeof(regs));
+	iov.iov_base = (u64 *) regs;
+	iov.iov_len = sizeof(regs);
+	ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TM_CVMX, &iov);
+	if (ret) {
+		perror("ptrace(PTRACE_SETREGSET, NT_PPC_TM_CVMX) failed");
+		return TEST_FAIL;
+	}
+	return TEST_PASS;
+}
+
+/* VSX */
+int show_vsx(pid_t child, unsigned long *vsx)
+{
+	int ret;
+
+	ret = ptrace(PTRACE_GETVSRREGS, child, 0, vsx);
+	if (ret) {
+		perror("ptrace(PTRACE_GETVSRREGS) failed");
+		return TEST_FAIL;
+	}
+	return TEST_PASS;
+}
+
+int show_vsx_ckpt(pid_t child, unsigned long *vsx)
+{
+	unsigned long regs[32];
+	struct iovec iov;
+	int ret;
+
+	iov.iov_base = (u64 *) regs;
+	iov.iov_len = sizeof(regs);
+	ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_CVSX, &iov);
+	if (ret) {
+		perror("ptrace(PTRACE_GETREGSET, NT_PPC_TM_CVSX) failed");
+		return TEST_FAIL;
+	}
+	memcpy(vsx, regs, sizeof(regs));
+	return TEST_PASS;
+}
+
+int write_vsx(pid_t child, unsigned long *vsx)
+{
+	int ret;
+
+	ret = ptrace(PTRACE_SETVSRREGS, child, 0, vsx);
+	if (ret) {
+		perror("ptrace(PTRACE_SETVSRREGS) failed");
+		return TEST_FAIL;
+	}
+	return TEST_PASS;
+}
+
+int write_vsx_ckpt(pid_t child, unsigned long *vsx)
+{
+	unsigned long regs[32];
+	struct iovec iov;
+	int ret;
+
+	memcpy(regs, vsx, sizeof(regs));
+	iov.iov_base = (u64 *) regs;
+	iov.iov_len = sizeof(regs);
+	ret = ptrace(PTRACE_SETREGSET, child, NT_PPC_TM_CVSX, &iov);
+	if (ret) {
+		perror("ptrace(PTRACE_SETREGSET, NT_PPC_TM_CVSX) failed");
+		return TEST_FAIL;
+	}
+	return TEST_PASS;
+}
+
 /* Analyse TEXASR after TM failure */
 inline unsigned long get_tfiar(void)
 {