powerpc: Context switch more PMU related SPRs
In commit 9353374 "Context switch the new EBB SPRs" we added support for
context switching some new EBB SPRs. However despite four of us signing
off on that patch we missed some. To be fair these are not actually new
SPRs, but they are now potentially user accessible so need to be context
switched.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 51cfb8f..0e9095e 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -465,6 +465,20 @@
std r0, THREAD_EBBHR(r3)
mfspr r0, SPRN_EBBRR
std r0, THREAD_EBBRR(r3)
+
+ /* PMU registers made user read/(write) by EBB */
+ mfspr r0, SPRN_SIAR
+ std r0, THREAD_SIAR(r3)
+ mfspr r0, SPRN_SDAR
+ std r0, THREAD_SDAR(r3)
+ mfspr r0, SPRN_SIER
+ std r0, THREAD_SIER(r3)
+ mfspr r0, SPRN_MMCR0
+ std r0, THREAD_MMCR0(r3)
+ mfspr r0, SPRN_MMCR2
+ std r0, THREAD_MMCR2(r3)
+ mfspr r0, SPRN_MMCRA
+ std r0, THREAD_MMCRA(r3)
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
#endif
@@ -560,6 +574,20 @@
ld r0, THREAD_EBBRR(r4)
mtspr SPRN_EBBRR, r0
+ /* PMU registers made user read/(write) by EBB */
+ ld r0, THREAD_SIAR(r4)
+ mtspr SPRN_SIAR, r0
+ ld r0, THREAD_SDAR(r4)
+ mtspr SPRN_SDAR, r0
+ ld r0, THREAD_SIER(r4)
+ mtspr SPRN_SIER, r0
+ ld r0, THREAD_MMCR0(r4)
+ mtspr SPRN_MMCR0, r0
+ ld r0, THREAD_MMCR2(r4)
+ mtspr SPRN_MMCR2, r0
+ ld r0, THREAD_MMCRA(r4)
+ mtspr SPRN_MMCRA, r0
+
ld r0,THREAD_TAR(r4)
mtspr SPRN_TAR,r0
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)