MIPS: KVM: Drop unused host_cp0_entryhi

The host EntryHi in the KVM VCPU context is virtually unused. It gets
stored on exceptions, but only ever used in a kvm_debug() when a TLB
miss occurs.

Drop it entirely, removing that information from the kvm_debug output.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index b310bb3..cbcedd7 100644 (file)
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -346,7 +346,6 @@ struct kvm_vcpu_arch {
        unsigned long host_cp0_badvaddr;
        unsigned long host_cp0_cause;
        unsigned long host_cp0_epc;
-       unsigned long host_cp0_entryhi;
 
        /* GPRS */
        unsigned long gprs[32];

diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c
index 4d96a90..4208088 100644 (file)
--- a/arch/mips/kernel/asm-offsets.c
+++ b/arch/mips/kernel/asm-offsets.c
@@ -364,7 +364,6 @@ void output_kvm_defines(void)
        OFFSET(VCPU_HOST_CP0_BADVADDR, kvm_vcpu_arch, host_cp0_badvaddr);
        OFFSET(VCPU_HOST_CP0_CAUSE, kvm_vcpu_arch, host_cp0_cause);
        OFFSET(VCPU_HOST_EPC, kvm_vcpu_arch, host_cp0_epc);
-       OFFSET(VCPU_HOST_ENTRYHI, kvm_vcpu_arch, host_cp0_entryhi);
 
        OFFSET(VCPU_R0, kvm_vcpu_arch, gprs[0]);
        OFFSET(VCPU_R1, kvm_vcpu_arch, gprs[1]);

diff --git a/arch/mips/kvm/emulate.c b/arch/mips/kvm/emulate.c
index 645c8a1..2836668 100644 (file)
--- a/arch/mips/kvm/emulate.c
+++ b/arch/mips/kvm/emulate.c
@@ -1634,7 +1634,6 @@ enum emulation_result kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc,
                                                   (cop0) & KVM_ENTRYHI_ASID));
 
                if (index < 0) {
-                       vcpu->arch.host_cp0_entryhi = (va & VPN2_MASK);
                        vcpu->arch.host_cp0_badvaddr = va;
                        vcpu->arch.pc = curr_pc;
                        er = kvm_mips_emulate_tlbmiss_ld(cause, NULL, run,
@@ -2576,8 +2575,8 @@ enum emulation_result kvm_mips_handle_tlbmiss(unsigned long cause,
        unsigned long va = vcpu->arch.host_cp0_badvaddr;
        int index;
 
-       kvm_debug("kvm_mips_handle_tlbmiss: badvaddr: %#lx, entryhi: %#lx\n",
-                 vcpu->arch.host_cp0_badvaddr, vcpu->arch.host_cp0_entryhi);
+       kvm_debug("kvm_mips_handle_tlbmiss: badvaddr: %#lx\n",
+                 vcpu->arch.host_cp0_badvaddr);
 
        /*
         * KVM would not have got the exception if this entry was valid in the

diff --git a/arch/mips/kvm/locore.S b/arch/mips/kvm/locore.S
index 828fcfc..5ad2d50 100644 (file)
--- a/arch/mips/kvm/locore.S
+++ b/arch/mips/kvm/locore.S
@@ -308,9 +308,6 @@ NESTED (MIPSX(GuestException), CALLFRAME_SIZ, ra)
        mfc0    k0, CP0_CAUSE
        LONG_S  k0, VCPU_HOST_CP0_CAUSE(k1)
 
-       mfc0    k0, CP0_ENTRYHI
-       LONG_S  k0, VCPU_HOST_ENTRYHI(k1)
-
        /* Now restore the host state just enough to run the handlers */
 
        /* Switch EBASE to the one used by Linux */