[kvm-unit-tests PATCH v2 2/3] lib: s390x: sclp: Extend feature probing

[Janosch Frank <frankja@linux.ibm.com>]

Lets grab more of the feature bits from SCLP read info so we can use
them in the cpumodel tests.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
---
 lib/s390x/sclp.c | 20 ++++++++++++++++++++
 lib/s390x/sclp.h | 38 +++++++++++++++++++++++++++++++++++---
 2 files changed, 55 insertions(+), 3 deletions(-)

diff --git a/lib/s390x/sclp.c b/lib/s390x/sclp.c
index f11c2035..291924b0 100644
--- a/lib/s390x/sclp.c
+++ b/lib/s390x/sclp.c
@@ -129,6 +129,13 @@ CPUEntry *sclp_get_cpu_entries(void)
 	return (CPUEntry *)(_read_info + read_info->offset_cpu);
 }
 
+static bool sclp_feat_check(int byte, int bit)
+{
+	uint8_t *rib = (uint8_t *)read_info;
+
+	return !!(rib[byte] & (0x80 >> bit));
+}
+
 void sclp_facilities_setup(void)
 {
 	unsigned short cpu0_addr = stap();
@@ -140,6 +147,14 @@ void sclp_facilities_setup(void)
 	cpu = sclp_get_cpu_entries();
 	if (read_info->offset_cpu > 134)
 		sclp_facilities.has_diag318 = read_info->byte_134_diag318;
+	sclp_facilities.has_gsls = sclp_feat_check(85, SCLP_FEAT_85_BIT_GSLS);
+	sclp_facilities.has_kss = sclp_feat_check(98, SCLP_FEAT_98_BIT_KSS);
+	sclp_facilities.has_cmma = sclp_feat_check(116, SCLP_FEAT_116_BIT_CMMA);
+	sclp_facilities.has_64bscao = sclp_feat_check(116, SCLP_FEAT_116_BIT_64BSCAO);
+	sclp_facilities.has_esca = sclp_feat_check(116, SCLP_FEAT_116_BIT_ESCA);
+	sclp_facilities.has_ibs = sclp_feat_check(117, SCLP_FEAT_117_BIT_IBS);
+	sclp_facilities.has_pfmfi = sclp_feat_check(117, SCLP_FEAT_117_BIT_PFMFI);
+
 	for (i = 0; i < read_info->entries_cpu; i++, cpu++) {
 		/*
 		 * The logic for only reading the facilities from the
@@ -150,6 +165,11 @@ void sclp_facilities_setup(void)
 		 */
 		if (cpu->address == cpu0_addr) {
 			sclp_facilities.has_sief2 = cpu->feat_sief2;
+			sclp_facilities.has_skeyi = cpu->feat_skeyi;
+			sclp_facilities.has_siif = cpu->feat_siif;
+			sclp_facilities.has_sigpif = cpu->feat_sigpif;
+			sclp_facilities.has_ib = cpu->feat_ib;
+			sclp_facilities.has_cei = cpu->feat_cei;
 			break;
 		}
 	}
diff --git a/lib/s390x/sclp.h b/lib/s390x/sclp.h
index 85231333..115bd2fa 100644
--- a/lib/s390x/sclp.h
+++ b/lib/s390x/sclp.h
@@ -94,9 +94,19 @@ typedef struct CPUEntry {
 	uint8_t reserved0;
 	uint8_t : 4;
 	uint8_t feat_sief2 : 1;
+	uint8_t feat_skeyi : 1;
+	uint8_t : 2;
+	uint8_t : 2;
+	uint8_t feat_gpere : 1;
+	uint8_t feat_siif : 1;
+	uint8_t feat_sigpif : 1;
 	uint8_t : 3;
-	uint8_t features_res2 [SCCB_CPU_FEATURE_LEN - 1];
-	uint8_t reserved2[6];
+	uint8_t reserved2[3];
+	uint8_t : 2;
+	uint8_t feat_ib : 1;
+	uint8_t feat_cei : 1;
+	uint8_t : 4;
+	uint8_t reserved3[6];
 	uint8_t type;
 	uint8_t reserved1;
 } __attribute__((packed)) CPUEntry;
@@ -105,10 +115,32 @@ extern struct sclp_facilities sclp_facilities;
 
 struct sclp_facilities {
 	uint64_t has_sief2 : 1;
+	uint64_t has_skeyi : 1;
+	uint64_t has_gpere : 1;
+	uint64_t has_siif : 1;
+	uint64_t has_sigpif : 1;
+	uint64_t has_ib : 1;
+	uint64_t has_cei : 1;
+
 	uint64_t has_diag318 : 1;
-	uint64_t : 62;
+	uint64_t has_gsls : 1;
+	uint64_t has_cmma : 1;
+	uint64_t has_64bscao : 1;
+	uint64_t has_esca : 1;
+	uint64_t has_kss : 1;
+	uint64_t has_pfmfi : 1;
+	uint64_t has_ibs : 1;
+	uint64_t : 64 - 15;
 };
 
+#define SCLP_FEAT_85_BIT_GSLS		7
+#define SCLP_FEAT_98_BIT_KSS		0
+#define SCLP_FEAT_116_BIT_64BSCAO	7
+#define SCLP_FEAT_116_BIT_CMMA		6
+#define SCLP_FEAT_116_BIT_ESCA		3
+#define SCLP_FEAT_117_BIT_PFMFI		6
+#define SCLP_FEAT_117_BIT_IBS		5
+
 typedef struct ReadInfo {
 	SCCBHeader h;
 	uint16_t rnmax;
-- 
2.30.2