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authorMichael Neuling <mikey@neuling.org>2019-06-04 13:00:37 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2019-07-03 15:19:35 +1000
commita278e7ea608bea5fe6df9b6ae91fa134655c5d2c (patch)
tree5eeb4faa4d6b050d034841d488b9e916429c6af5 /arch/powerpc/kernel/process.c
parent548c54acba5bd1388d50727a9a126a42d0cd4ad0 (diff)
downloadlinux-a278e7ea608bea5fe6df9b6ae91fa134655c5d2c.tar.gz
powerpc: Fix compile issue with force DAWR
If you compile with KVM but without CONFIG_HAVE_HW_BREAKPOINT you fail at linking with: arch/powerpc/kvm/book3s_hv_rmhandlers.o:(.text+0x708): undefined reference to `dawr_force_enable' This was caused by commit c1fe190c0672 ("powerpc: Add force enable of DAWR on P9 option"). This moves a bunch of code around to fix this. It moves a lot of the DAWR code in a new file and creates a new CONFIG_PPC_DAWR to enable compiling it. Fixes: c1fe190c0672 ("powerpc: Add force enable of DAWR on P9 option") Signed-off-by: Michael Neuling <mikey@neuling.org> [mpe: Minor formatting in set_dawr()] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/process.c')
-rw-r--r--arch/powerpc/kernel/process.c28
1 files changed, 0 insertions, 28 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 87da40129927..03a2da35ce61 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -797,34 +797,6 @@ static inline int set_dabr(struct arch_hw_breakpoint *brk)
return __set_dabr(dabr, dabrx);
}
-int set_dawr(struct arch_hw_breakpoint *brk)
-{
- unsigned long dawr, dawrx, mrd;
-
- dawr = brk->address;
-
- dawrx = (brk->type & (HW_BRK_TYPE_READ | HW_BRK_TYPE_WRITE)) \
- << (63 - 58); //* read/write bits */
- dawrx |= ((brk->type & (HW_BRK_TYPE_TRANSLATE)) >> 2) \
- << (63 - 59); //* translate */
- dawrx |= (brk->type & (HW_BRK_TYPE_PRIV_ALL)) \
- >> 3; //* PRIM bits */
- /* dawr length is stored in field MDR bits 48:53. Matches range in
- doublewords (64 bits) baised by -1 eg. 0b000000=1DW and
- 0b111111=64DW.
- brk->len is in bytes.
- This aligns up to double word size, shifts and does the bias.
- */
- mrd = ((brk->len + 7) >> 3) - 1;
- dawrx |= (mrd & 0x3f) << (63 - 53);
-
- if (ppc_md.set_dawr)
- return ppc_md.set_dawr(dawr, dawrx);
- mtspr(SPRN_DAWR, dawr);
- mtspr(SPRN_DAWRX, dawrx);
- return 0;
-}
-
void __set_breakpoint(struct arch_hw_breakpoint *brk)
{
memcpy(this_cpu_ptr(&current_brk), brk, sizeof(*brk));