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/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index d7e67ca..594db6b 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -284,6 +284,12 @@
unsigned long ebbrr;
unsigned long ebbhr;
unsigned long bescr;
+ unsigned long siar;
+ unsigned long sdar;
+ unsigned long sier;
+ unsigned long mmcr0;
+ unsigned long mmcr2;
+ unsigned long mmcra;
#endif
};
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index b51a97c..6f16ffa 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -127,6 +127,12 @@
DEFINE(THREAD_BESCR, offsetof(struct thread_struct, bescr));
DEFINE(THREAD_EBBHR, offsetof(struct thread_struct, ebbhr));
DEFINE(THREAD_EBBRR, offsetof(struct thread_struct, ebbrr));
+ DEFINE(THREAD_SIAR, offsetof(struct thread_struct, siar));
+ DEFINE(THREAD_SDAR, offsetof(struct thread_struct, sdar));
+ DEFINE(THREAD_SIER, offsetof(struct thread_struct, sier));
+ DEFINE(THREAD_MMCR0, offsetof(struct thread_struct, mmcr0));
+ DEFINE(THREAD_MMCR2, offsetof(struct thread_struct, mmcr2));
+ DEFINE(THREAD_MMCRA, offsetof(struct thread_struct, mmcra));
#endif
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
DEFINE(PACATMSCRATCH, offsetof(struct paca_struct, tm_scratch));
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)