diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_rmhandlers.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_rmhandlers.S | 54 |
1 files changed, 20 insertions, 34 deletions
diff --git a/arch/powerpc/kvm/book3s_rmhandlers.S b/arch/powerpc/kvm/book3s_rmhandlers.S index c1f877c4a88..34187585c50 100644 --- a/arch/powerpc/kvm/book3s_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_rmhandlers.S @@ -20,6 +20,7 @@ #include <asm/ppc_asm.h> #include <asm/kvm_asm.h> #include <asm/reg.h> +#include <asm/mmu.h> #include <asm/page.h> #include <asm/asm-offsets.h> @@ -35,10 +36,10 @@ #if defined(CONFIG_PPC_BOOK3S_64) -#define LOAD_SHADOW_VCPU(reg) GET_PACA(reg) -#define MSR_NOIRQ MSR_KERNEL & ~(MSR_IR | MSR_DR) #define FUNC(name) GLUE(.,name) +#define MTMSR_EERI(reg) mtmsrd (reg),1 + .globl kvmppc_skip_interrupt kvmppc_skip_interrupt: /* * Here all GPRs are unchanged from when the interrupt happened @@ -51,6 +52,7 @@ kvmppc_skip_interrupt: rfid b . + .globl kvmppc_skip_Hinterrupt kvmppc_skip_Hinterrupt: /* * Here all GPRs are unchanged from when the interrupt happened @@ -65,8 +67,8 @@ kvmppc_skip_Hinterrupt: #elif defined(CONFIG_PPC_BOOK3S_32) -#define MSR_NOIRQ MSR_KERNEL #define FUNC(name) name +#define MTMSR_EERI(reg) mtmsr (reg) .macro INTERRUPT_TRAMPOLINE intno @@ -167,40 +169,24 @@ kvmppc_handler_skip_ins: #endif /* - * This trampoline brings us back to a real mode handler - * - * Input Registers: - * - * R5 = SRR0 - * R6 = SRR1 - * LR = real-mode IP + * Call kvmppc_handler_trampoline_enter in real mode * + * On entry, r4 contains the guest shadow MSR */ -.global kvmppc_handler_lowmem_trampoline -kvmppc_handler_lowmem_trampoline: - - mtsrr0 r5 +_GLOBAL(kvmppc_entry_trampoline) + mfmsr r5 + LOAD_REG_ADDR(r7, kvmppc_handler_trampoline_enter) + toreal(r7) + + li r9, MSR_RI + ori r9, r9, MSR_EE + andc r9, r5, r9 /* Clear EE and RI in MSR value */ + li r6, MSR_IR | MSR_DR + ori r6, r6, MSR_EE + andc r6, r5, r6 /* Clear EE, DR and IR in MSR value */ + MTMSR_EERI(r9) /* Clear EE and RI in MSR */ + mtsrr0 r7 /* before we set srr0/1 */ mtsrr1 r6 - blr -kvmppc_handler_lowmem_trampoline_end: - -/* - * Call a function in real mode - * - * Input Registers: - * - * R3 = function - * R4 = MSR - * R5 = scratch register - * - */ -_GLOBAL(kvmppc_rmcall) - LOAD_REG_IMMEDIATE(r5, MSR_NOIRQ) - mtmsr r5 /* Disable relocation and interrupts, so mtsrr - doesn't get interrupted */ - sync - mtsrr0 r3 - mtsrr1 r4 RFI #if defined(CONFIG_PPC_BOOK3S_32) |