The branch main has been updated by jhibbits:
URL:
https://cgit.FreeBSD.org/src/commit/?id=fe73eb441f1c98fe350f4822c7d2abfeef046bf8
commit fe73eb441f1c98fe350f4822c7d2abfeef046bf8
Author: Justin Hibbits <jhibb...@freebsd.org>
AuthorDate: 2025-03-19 22:25:40 +0000
Commit: Justin Hibbits <jhibb...@freebsd.org>
CommitDate: 2025-03-19 22:35:17 +0000
powernv: Explicitly enable the facilities we support
Thus far we've relied on the firmware setting HFSCR correctly, enabling
all facilities. However, it appears some recent firmwares do not.
Linux explicitly enables all facilities it supports (including
transactional memory, which new firmwares apparently do not enable), so
do the same here, explicitly enable all the facilities FreeBSD supports.
MFC after: 1 week
---
sys/powerpc/include/spr.h | 5 +++++
sys/powerpc/powernv/platform_powernv.c | 6 ++++++
2 files changed, 11 insertions(+)
diff --git a/sys/powerpc/include/spr.h b/sys/powerpc/include/spr.h
index 5bb3858b0fb5..605b1be194d9 100644
--- a/sys/powerpc/include/spr.h
+++ b/sys/powerpc/include/spr.h
@@ -162,6 +162,11 @@
#define FSCR_DSCR 0x0000000000000004 /* DSCR available
in PR state */
#define SPR_UAMOR 0x09d /* User Authority Mask Override
Register */
#define SPR_DPDES 0x0b0 /* .6. Directed Privileged
Doorbell Exception State Register */
+#define SPR_HFSCR 0xbe /* Hypervisor Facility Status
and Control Register */
+#define HFSCR_BHRB 0x0000000000000010 /* BHRB
instructions */
+#define HFSCR_PM 0x0000000000000008 /* Performance
monitor SPRs */
+#define HFSCR_VECVSX 0x0000000000000002 /* Vector and VSX
facilities */
+#define HFSCR_FP 0x0000000000000001 /* Floating Point
facility */
#define SPR_USPRG0 0x100 /* 4.8 User SPR General 0 */
#define SPR_VRSAVE 0x100 /* .6. AltiVec VRSAVE */
#define SPR_SPRG0 0x110 /* 468 SPR General 0 */
diff --git a/sys/powerpc/powernv/platform_powernv.c
b/sys/powerpc/powernv/platform_powernv.c
index 50af24794e69..678631322173 100644
--- a/sys/powerpc/powernv/platform_powernv.c
+++ b/sys/powerpc/powernv/platform_powernv.c
@@ -138,6 +138,7 @@ powernv_attach(platform_t plat)
phandle_t opal;
int res, len, idx;
register_t msr;
+ register_t fscr;
bool has_lp;
/* Ping OPAL again just to make sure */
@@ -179,6 +180,11 @@ powernv_attach(platform_t plat)
mtspr(SPR_LPCR, lpcr);
isync();
+ fscr = mfspr(SPR_HFSCR);
+ fscr |= FSCR_TAR | FSCR_EBB | HFSCR_BHRB | HFSCR_PM |
+ HFSCR_VECVSX | HFSCR_FP | FSCR_MSGP | FSCR_DSCR;
+ mtspr(SPR_HFSCR, fscr);
+
mtmsr(msr);
powernv_cpuref_init();
