No generated code change.
Signed-off-by: Nicholas Piggin <npig...@gmail.com>
---
arch/powerpc/kernel/exceptions-64s.S | 127 ++++++++++++---------------
1 file changed, 55 insertions(+), 72 deletions(-)
diff --git a/arch/powerpc/kernel/exceptions-64s.S
b/arch/powerpc/kernel/exceptions-64s.S
index 8a65ae64ed54..1c11a7330856 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -1615,6 +1615,7 @@ EXC_COMMON(trap_0b_common, 0xb00, unknown_exception)
* without saving, though xer is not a good idea to use, as hardware may
* interpret some bits so it may be costly to change them.
*/
+.macro SYSTEM_CALL real
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
/*
* There is a little bit of juggling to get syscall and hcall
@@ -1624,95 +1625,77 @@ EXC_COMMON(trap_0b_common, 0xb00, unknown_exception)
* Userspace syscalls have already saved the PPR, hcalls must save
* it before setting HMT_MEDIUM.
*/
-#define SYSCALL_KVMTEST
\
- mtctr r13; \
- GET_PACA(r13); \
- std r10,PACA_EXGEN+EX_R10(r13); \
- INTERRUPT_TO_KERNEL; \
- KVMTEST EXC_STD 0xc00 ; /* uses r10, branch to do_kvm_0xc00_system_call
*/ \
- HMT_MEDIUM; \
- mfctr r9;
-
+ mtctr r13
+ GET_PACA(r13)
+ std r10,PACA_EXGEN+EX_R10(r13)
+ INTERRUPT_TO_KERNEL
+ KVMTEST EXC_STD 0xc00 /* uses r10, branch to do_kvm_0xc00_system_call */
+ HMT_MEDIUM
+ mfctr r9
#else
-#define SYSCALL_KVMTEST
\
- HMT_MEDIUM; \
- mr r9,r13; \
- GET_PACA(r13); \
- INTERRUPT_TO_KERNEL;
+ HMT_MEDIUM
+ mr r9,r13
+ GET_PACA(r13)
+ INTERRUPT_TO_KERNEL
#endif
-
-#define LOAD_SYSCALL_HANDLER(reg) \
- __LOAD_HANDLER(reg, system_call_common)
-
-/*
- * After SYSCALL_KVMTEST, we reach here with PACA in r13, r13 in r9,
- * and HMT_MEDIUM.
- */
-#define SYSCALL_REAL \
- mfspr r11,SPRN_SRR0 ; \
- mfspr r12,SPRN_SRR1 ; \
- LOAD_SYSCALL_HANDLER(r10) ; \
- mtspr SPRN_SRR0,r10 ; \
- ld r10,PACAKMSR(r13) ; \
- mtspr SPRN_SRR1,r10 ; \
- RFI_TO_KERNEL ; \
- b . ; /* prevent speculative execution */
#ifdef CONFIG_PPC_FAST_ENDIAN_SWITCH
-#define SYSCALL_FASTENDIAN_TEST \
-BEGIN_FTR_SECTION \
- cmpdi r0,0x1ebe ; \
- beq- 1f ; \
-END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) \
-
-#define SYSCALL_FASTENDIAN \
- /* Fast LE/BE switch system call */ \
-1: mfspr r12,SPRN_SRR1 ; \
- xori r12,r12,MSR_LE ; \
- mtspr SPRN_SRR1,r12 ; \
- mr r13,r9 ; \
- RFI_TO_USER ; /* return to userspace */ \
- b . ; /* prevent speculative execution */
-#else
-#define SYSCALL_FASTENDIAN_TEST
-#define SYSCALL_FASTENDIAN
-#endif /* CONFIG_PPC_FAST_ENDIAN_SWITCH */
+BEGIN_FTR_SECTION
+ cmpdi r0,0x1ebe
+ beq- 1f
+END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE)
+#endif
+ /* We reach here with PACA in r13, r13 in r9, and HMT_MEDIUM. */
-#if defined(CONFIG_RELOCATABLE)
+ .if \real
+ mfspr r11,SPRN_SRR0
+ mfspr r12,SPRN_SRR1
+ __LOAD_HANDLER(r10, system_call_common)
+ mtspr SPRN_SRR0,r10
+ ld r10,PACAKMSR(r13)
+ mtspr SPRN_SRR1,r10
+ RFI_TO_KERNEL
+ b . /* prevent speculative execution */
+ .else
+#ifdef CONFIG_RELOCATABLE
/*
* We can't branch directly so we do it via the CTR which
* is volatile across system calls.
*/
-#define SYSCALL_VIRT \
- LOAD_SYSCALL_HANDLER(r10) ; \
- mtctr r10 ; \
- mfspr r11,SPRN_SRR0 ; \
- mfspr r12,SPRN_SRR1 ; \
- li r10,MSR_RI ; \
- mtmsrd r10,1 ; \
- bctr ;
+ __LOAD_HANDLER(r10, system_call_common)
+ mtctr r10
+ mfspr r11,SPRN_SRR0
+ mfspr r12,SPRN_SRR1
+ li r10,MSR_RI
+ mtmsrd r10,1
+ bctr
#else
/* We can branch directly */
-#define SYSCALL_VIRT \
- mfspr r11,SPRN_SRR0 ; \
- mfspr r12,SPRN_SRR1 ; \
- li r10,MSR_RI ; \
- mtmsrd r10,1 ; /* Set RI (EE=0) */ \
- b system_call_common ;
+ mfspr r11,SPRN_SRR0
+ mfspr r12,SPRN_SRR1
+ li r10,MSR_RI
+ mtmsrd r10,1 /* Set RI (EE=0) */
+ b system_call_common
+#endif
+ .endif
+
+#ifdef CONFIG_PPC_FAST_ENDIAN_SWITCH
+ /* Fast LE/BE switch system call */
+1: mfspr r12,SPRN_SRR1
+ xori r12,r12,MSR_LE
+ mtspr SPRN_SRR1,r12
+ mr r13,r9
+ RFI_TO_USER /* return to userspace */
+ b . /* prevent speculative execution */
#endif
+.endm
EXC_REAL_BEGIN(system_call, 0xc00, 0x100)
- SYSCALL_KVMTEST /* loads PACA into r13, and saves r13 to r9 */
- SYSCALL_FASTENDIAN_TEST
- SYSCALL_REAL
- SYSCALL_FASTENDIAN
+ SYSTEM_CALL 1
EXC_REAL_END(system_call, 0xc00, 0x100)
EXC_VIRT_BEGIN(system_call, 0x4c00, 0x100)
- SYSCALL_KVMTEST /* loads PACA into r13, and saves r13 to r9 */
- SYSCALL_FASTENDIAN_TEST
- SYSCALL_VIRT
- SYSCALL_FASTENDIAN
+ SYSTEM_CALL 0
EXC_VIRT_END(system_call, 0x4c00, 0x100)
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
--
2.20.1
