powerpc/64s: Simple RFI macro conversions

commit 222f20f140623ef6033491d0103ee0875fe87d35 upstream.

This commit does simple conversions of rfi/rfid to the new macros that
include the expected destination context. By simple we mean cases
where there is a single well known destination context, and it's
simply a matter of substituting the instruction for the appropriate
macro.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
[Balbir fixed issues with backporting to stable]
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>

diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index 2367cee008ce8be7e6c0f37212eb3426a4b75ef1..9bddbec441b8017f599012d4e8471ed5132d9107 100644 (file)
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -244,7 +244,7 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
        mtspr   SPRN_##h##SRR0,r12;                                     \
        mfspr   r12,SPRN_##h##SRR1;     /* and SRR1 */                  \
        mtspr   SPRN_##h##SRR1,r10;                                     \
-       h##rfid;                                                        \
+       h##RFI_TO_KERNEL;                                               \
        b       .       /* prevent speculative execution */
 #define EXCEPTION_PROLOG_PSERIES_1(label, h)                           \
        __EXCEPTION_PROLOG_PSERIES_1(label, h)

diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index dc22fdcdcb091add465b30e18e9c72cf5991a467..36a8bf3d053b80c6aeb97701a3235f128a9ea402 100644 (file)
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -34,6 +34,11 @@
 #include <asm/ftrace.h>
 #include <asm/hw_irq.h>
 #include <asm/context_tracking.h>
+#ifdef CONFIG_PPC_BOOK3S
+#include <asm/exception-64s.h>
+#else
+#include <asm/exception-64e.h>
+#endif
 
 /*
  * System calls.
@@ -1054,7 +1059,7 @@ _GLOBAL(enter_rtas)
        
        mtspr   SPRN_SRR0,r5
        mtspr   SPRN_SRR1,r6
-       rfid
+       RFI_TO_KERNEL
        b       .       /* prevent speculative execution */
 
 rtas_return_loc:
@@ -1079,7 +1084,7 @@ rtas_return_loc:
 
        mtspr   SPRN_SRR0,r3
        mtspr   SPRN_SRR1,r4
-       rfid
+       RFI_TO_KERNEL
        b       .       /* prevent speculative execution */
 
        .align  3
@@ -1150,7 +1155,7 @@ _GLOBAL(enter_prom)
        LOAD_REG_IMMEDIATE(r12, MSR_SF | MSR_ISF | MSR_LE)
        andc    r11,r11,r12
        mtsrr1  r11
-       rfid
+       RFI_TO_KERNEL
 #endif /* CONFIG_PPC_BOOK3E */
 
 1:     /* Return from OF */

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 12f7056716526f40fc1eb28c4ade8367a955d4ff..9c102be8cd97849928ee652b8d0faaa280e2c509 100644 (file)
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -46,7 +46,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE)                                \
        mtspr   SPRN_SRR0,r10 ;                                 \
        ld      r10,PACAKMSR(r13) ;                             \
        mtspr   SPRN_SRR1,r10 ;                                 \
-       rfid ;                                                  \
+       RFI_TO_KERNEL ;                                                         \
        b       . ;     /* prevent speculative execution */
 
 #define SYSCALL_PSERIES_3                                      \
@@ -54,7 +54,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE)                                \
 1:     mfspr   r12,SPRN_SRR1 ;                                 \
        xori    r12,r12,MSR_LE ;                                \
        mtspr   SPRN_SRR1,r12 ;                                 \
-       rfid ;          /* return to userspace */               \
+       RFI_TO_USER ;           /* return to userspace */               \
        b       . ;     /* prevent speculative execution */
 
 #if defined(CONFIG_RELOCATABLE)
@@ -508,7 +508,7 @@ BEGIN_FTR_SECTION
        LOAD_HANDLER(r12, machine_check_handle_early)
 1:     mtspr   SPRN_SRR0,r12
        mtspr   SPRN_SRR1,r11
-       rfid
+       RFI_TO_KERNEL
        b       .       /* prevent speculative execution */
 2:
        /* Stack overflow. Stay on emergency stack and panic.
@@ -602,7 +602,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_CFAR)
        ld      r11,PACA_EXGEN+EX_R11(r13)
        ld      r12,PACA_EXGEN+EX_R12(r13)
        ld      r13,PACA_EXGEN+EX_R13(r13)
-       HRFID
+       HRFI_TO_UNKNOWN
        b       .
 #endif
 
@@ -667,7 +667,7 @@ masked_##_H##interrupt:                                     \
        ld      r10,PACA_EXGEN+EX_R10(r13);             \
        ld      r11,PACA_EXGEN+EX_R11(r13);             \
        GET_SCRATCH0(r13);                              \
-       ##_H##rfid;                                     \
+       ##_H##RFI_TO_KERNEL;                            \
        b       .
        
        MASKED_INTERRUPT()
@@ -757,7 +757,7 @@ kvmppc_skip_interrupt:
        addi    r13, r13, 4
        mtspr   SPRN_SRR0, r13
        GET_SCRATCH0(r13)
-       rfid
+       RFI_TO_KERNEL
        b       .
 
 kvmppc_skip_Hinterrupt:
@@ -769,7 +769,7 @@ kvmppc_skip_Hinterrupt:
        addi    r13, r13, 4
        mtspr   SPRN_HSRR0, r13
        GET_SCRATCH0(r13)
-       hrfid
+       HRFI_TO_KERNEL
        b       .
 #endif
 
@@ -1447,7 +1447,7 @@ machine_check_handle_early:
        li      r3,MSR_ME
        andc    r10,r10,r3              /* Turn off MSR_ME */
        mtspr   SPRN_SRR1,r10
-       rfid
+       RFI_TO_KERNEL
        b       .
 2:
        /*
@@ -1465,7 +1465,7 @@ machine_check_handle_early:
         */
        bl      machine_check_queue_event
        MACHINE_CHECK_HANDLER_WINDUP
-       rfid
+       RFI_TO_USER_OR_KERNEL
 9:
        /* Deliver the machine check to host kernel in V mode. */
        MACHINE_CHECK_HANDLER_WINDUP

diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index a3018f109cd3cb1e0751dfbd86aa8ded3684766b..a7bd4100f158ed6f3c6010219b7e49b56c80df54 100644 (file)
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -64,7 +64,7 @@ _GLOBAL_TOC(kvmppc_hv_entry_trampoline)
        mtmsrd  r0,1            /* clear RI in MSR */
        mtsrr0  r5
        mtsrr1  r6
-       RFI
+       RFI_TO_KERNEL
 
 kvmppc_call_hv_entry:
        ld      r4, HSTATE_KVM_VCPU(r13)
@@ -164,7 +164,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
        mtsrr0  r8
        mtsrr1  r7
        beq     cr1, 13f                /* machine check */
-       RFI
+       RFI_TO_KERNEL
 
        /* On POWER7, we have external interrupts set to use HSRR0/1 */
 11:    mtspr   SPRN_HSRR0, r8
@@ -877,8 +877,7 @@ BEGIN_FTR_SECTION
 END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
        ld      r0, VCPU_GPR(R0)(r4)
        ld      r4, VCPU_GPR(R4)(r4)
-
-       hrfid
+       HRFI_TO_GUEST
        b       .
 
 secondary_too_late:

diff --git a/arch/powerpc/kvm/book3s_rmhandlers.S b/arch/powerpc/kvm/book3s_rmhandlers.S
index 16c4d88ba27df9ed3caba2e37e20d02a40407dbc..a328f99a887cddef3e375661ef9a1715fc0906af 100644 (file)
--- a/arch/powerpc/kvm/book3s_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_rmhandlers.S
@@ -46,6 +46,9 @@
 
 #define FUNC(name)             name
 
+#define RFI_TO_KERNEL  RFI
+#define RFI_TO_GUEST   RFI
+
 .macro INTERRUPT_TRAMPOLINE intno
 
 .global kvmppc_trampoline_\intno
@@ -141,7 +144,7 @@ kvmppc_handler_skip_ins:
        GET_SCRATCH0(r13)
 
        /* And get back into the code */
-       RFI
+       RFI_TO_KERNEL
 #endif
 
 /*
@@ -164,6 +167,6 @@ _GLOBAL_TOC(kvmppc_entry_trampoline)
        ori     r5, r5, MSR_EE
        mtsrr0  r7
        mtsrr1  r6
-       RFI
+       RFI_TO_KERNEL
 
 #include "book3s_segment.S"

diff --git a/arch/powerpc/kvm/book3s_segment.S b/arch/powerpc/kvm/book3s_segment.S
index acee37cde840a3b18a512a09bfc79634a8e26f07..af3a91c00b463f168c6c9df12bd37666d0be435d 100644 (file)
--- a/arch/powerpc/kvm/book3s_segment.S
+++ b/arch/powerpc/kvm/book3s_segment.S
@@ -156,7 +156,7 @@ no_dcbz32_on:
        PPC_LL  r9, SVCPU_R9(r3)
        PPC_LL  r3, (SVCPU_R3)(r3)
 
-       RFI
+       RFI_TO_GUEST
 kvmppc_handler_trampoline_enter_end:
 
 
@@ -389,5 +389,5 @@ END_FTR_SECTION_IFSET(CPU_FTR_HVMODE)
        cmpwi   r12, BOOK3S_INTERRUPT_DOORBELL
        beqa    BOOK3S_INTERRUPT_DOORBELL
 
-       RFI
+       RFI_TO_KERNEL
 kvmppc_handler_trampoline_exit_end: