Add ADI (Application Data Integrity) capability to cpu capabilities list.
ADI capability allows virtual addresses to be encoded with a tag in
bits 63-60. This tag serves as an access control key for the regions
of virtual address with ADI enabled and a key set on them. Hypervisor
encodes this capability as "adp" in "hwcap-list" property in machine
description.
Signed-off-by: Khalid Aziz <khalid.a...@oracle.com>
---
arch/sparc/include/asm/elf_64.h | 1 +
arch/sparc/kernel/setup_64.c | 23 +++++++++++++++--------
2 files changed, 16 insertions(+), 8 deletions(-)
diff --git a/arch/sparc/include/asm/elf_64.h b/arch/sparc/include/asm/elf_64.h
index 370ca1e..9331083 100644
--- a/arch/sparc/include/asm/elf_64.h
+++ b/arch/sparc/include/asm/elf_64.h
@@ -95,6 +95,7 @@
* really available. So we simply advertise only "crypto" support.
*/
#define HWCAP_SPARC_CRYPTO 0x04000000 /* CRYPTO insns available */
+#define HWCAP_SPARC_ADI 0x08000000 /* ADI available */
#define CORE_DUMP_USE_REGSET
diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
index f7b2617..22c3566 100644
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -380,7 +380,8 @@ static const char *hwcaps[] = {
*/
"mul32", "div32", "fsmuld", "v8plus", "popc", "vis", "vis2",
"ASIBlkInit", "fmaf", "vis3", "hpc", "random", "trans", "fjfmau",
- "ima", "cspare", "pause", "cbcond",
+ "ima", "cspare", "pause", "cbcond", NULL /*reserved for crypto */,
+ "adp",
};
static const char *crypto_hwcaps[] = {
@@ -396,9 +397,13 @@ void cpucap_info(struct seq_file *m)
seq_puts(m, "cpucaps\t\t: ");
for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {
unsigned long bit = 1UL << i;
- if (caps & bit) {
- seq_printf(m, "%s%s",
- printed ? "," : "", hwcaps[i]);
+ if (hwcaps[i] && (caps & bit)) {
+ if (strcmp(hwcaps[i], "adp") == 0)
+ seq_printf(m, "%sadi",
+ printed ? "," : "");
+ else
+ seq_printf(m, "%s%s",
+ printed ? "," : "", hwcaps[i]);
printed++;
}
}
@@ -422,8 +427,10 @@ static void __init report_one_hwcap(int *printed, const
char *name)
{
if ((*printed) == 0)
printk(KERN_INFO "CPU CAPS: [");
- printk(KERN_CONT "%s%s",
- (*printed) ? "," : "", name);
+ if (strcmp(name, "adp") == 0)
+ pr_cont("%sadi", (*printed) ? "," : "");
+ else
+ pr_cont("%s%s", (*printed) ? "," : "", name);
if (++(*printed) == 8) {
printk(KERN_CONT "]\n");
*printed = 0;
@@ -450,7 +457,7 @@ static void __init report_hwcaps(unsigned long caps)
for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {
unsigned long bit = 1UL << i;
- if (caps & bit)
+ if (hwcaps[i] && (caps & bit))
report_one_hwcap(&printed, hwcaps[i]);
}
if (caps & HWCAP_SPARC_CRYPTO)
@@ -485,7 +492,7 @@ static unsigned long __init mdesc_cpu_hwcap_list(void)
for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {
unsigned long bit = 1UL << i;
- if (!strcmp(prop, hwcaps[i])) {
+ if (hwcaps[i] && !strcmp(prop, hwcaps[i])) {
caps |= bit;
break;
}
--
2.1.4
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