KVM: s390: selftests: Add regression tests for PFCR subfunctions

JIRA: https://issues.redhat.com/browse/RHEL-113440

commit 7a1f314
Author: Hendrik Brueckner <brueckner@linux.ibm.com>
Date:   Thu Nov 7 16:23:19 2024 +0100

    KVM: s390: selftests: Add regression tests for PFCR subfunctions

    Check if the PFCR query reported in userspace coincides with the
    kernel reported function list. Right now we don't mask the functions
    in the kernel so they have to be the same.

    Signed-off-by: Hendrik Brueckner <brueckner@linux.ibm.com>
    Reviewed-by: Hariharan Mari <hari55@linux.ibm.com>
    Link: https://lore.kernel.org/r/20241107152319.77816-5-brueckner@linux.ibm.com
    [frankja@linux.ibm.com: Added commit description]
    Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
    Message-ID: <20241107152319.77816-5-brueckner@linux.ibm.com>

Conflicts:
    tools/arch/s390/include/uapi/asm/kvm.h
    (hunk was already available in downstream)
Signed-off-by: Thomas Huth <thuth@redhat.com>

Author: huth

tools/testing/selftests/kvm/s390/cpumodel_subfuncs_test.c

@@ -214,6 +214,19 @@ static void test_dfltcc_asm_block(u8 (*query)[32])
 			: "cc", "0", "1");
 }
 
+/*
+ * Testing Perform Function with Concurrent Results (PFCR)
+ * CPU subfunctions's ASM block
+ */
+static void test_pfcr_asm_block(u8 (*query)[16])
+{
+	asm volatile("	lghi	0,0\n"
+			"	.insn   rsy,0xeb0000000016,0,0,%[query]\n"
+			: [query] "=QS" (*query)
+			:
+			: "cc", "0");
+}
+
 typedef void (*testfunc_t)(u8 (*array)[]);
 
 struct testdef {
@@ -249,6 +262,8 @@ struct testdef {
 	{ "SORTL", cpu_subfunc.sortl, sizeof(cpu_subfunc.sortl), test_sortl_asm_block, 150 },
 	/* DFLTCC - Facility bit 151 */
 	{ "DFLTCC", cpu_subfunc.dfltcc, sizeof(cpu_subfunc.dfltcc), test_dfltcc_asm_block, 151 },
+	/* Concurrent-function facility - Facility bit 201 */
+	{ "PFCR", cpu_subfunc.pfcr, sizeof(cpu_subfunc.pfcr), test_pfcr_asm_block, 201 },
 };
 
 int main(int argc, char *argv[])