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Commit 450869d6 authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

KVM: x86: merge handle_mmio_page_fault and handle_mmio_page_fault_common 



They are exactly the same, except that handle_mmio_page_fault
has an unused argument and a call to WARN_ON.  Remove the unused
argument from the callers, and move the warning to (the former)
handle_mmio_page_fault_common.

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent a3eaa864

arch/x86/kvm/mmu.c

+5 −15
Original line number Diff line number Diff line
@@ -3359,7 +3359,7 @@ exit: 
	return reserved;

}



int handle_mmio_page_fault_common(struct kvm_vcpu *vcpu, u64 addr, bool direct)

int handle_mmio_page_fault(struct kvm_vcpu *vcpu, u64 addr, bool direct)

{

	u64 spte;

	bool reserved;
@@ -3368,7 +3368,7 @@ int handle_mmio_page_fault_common(struct kvm_vcpu *vcpu, u64 addr, bool direct) 
		return RET_MMIO_PF_EMULATE;



	reserved = walk_shadow_page_get_mmio_spte(vcpu, addr, &spte);

	if (unlikely(reserved))

	if (WARN_ON(reserved))

		return RET_MMIO_PF_BUG;



	if (is_mmio_spte(spte)) {
@@ -3392,17 +3392,7 @@ int handle_mmio_page_fault_common(struct kvm_vcpu *vcpu, u64 addr, bool direct) 
	 */

	return RET_MMIO_PF_RETRY;

}

EXPORT_SYMBOL_GPL(handle_mmio_page_fault_common);



static int handle_mmio_page_fault(struct kvm_vcpu *vcpu, u64 addr,

				  u32 error_code, bool direct)

{

	int ret;



	ret = handle_mmio_page_fault_common(vcpu, addr, direct);

	WARN_ON(ret == RET_MMIO_PF_BUG);

	return ret;

}

EXPORT_SYMBOL_GPL(handle_mmio_page_fault);



static int nonpaging_page_fault(struct kvm_vcpu *vcpu, gva_t gva,

				u32 error_code, bool prefault)
@@ -3413,7 +3403,7 @@ static int nonpaging_page_fault(struct kvm_vcpu *vcpu, gva_t gva, 
	pgprintk("%s: gva %lx error %x\n", __func__, gva, error_code);



	if (unlikely(error_code & PFERR_RSVD_MASK)) {

		r = handle_mmio_page_fault(vcpu, gva, error_code, true);

		r = handle_mmio_page_fault(vcpu, gva, true);



		if (likely(r != RET_MMIO_PF_INVALID))

			return r;
@@ -3503,7 +3493,7 @@ static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa, u32 error_code, 
	MMU_WARN_ON(!VALID_PAGE(vcpu->arch.mmu.root_hpa));



	if (unlikely(error_code & PFERR_RSVD_MASK)) {

		r = handle_mmio_page_fault(vcpu, gpa, error_code, true);

		r = handle_mmio_page_fault(vcpu, gpa, true);



		if (likely(r != RET_MMIO_PF_INVALID))

			return r;

arch/x86/kvm/mmu.h

+3 −3
Original line number Diff line number Diff line
@@ -56,13 +56,13 @@ void 
reset_shadow_zero_bits_mask(struct kvm_vcpu *vcpu, struct kvm_mmu *context);



/*

 * Return values of handle_mmio_page_fault_common:

 * Return values of handle_mmio_page_fault:

 * RET_MMIO_PF_EMULATE: it is a real mmio page fault, emulate the instruction

 *			directly.

 * RET_MMIO_PF_INVALID: invalid spte is detected then let the real page

 *			fault path update the mmio spte.

 * RET_MMIO_PF_RETRY: let CPU fault again on the address.

 * RET_MMIO_PF_BUG: bug is detected.

 * RET_MMIO_PF_BUG: a bug was detected (and a WARN was printed).

 */

enum {

	RET_MMIO_PF_EMULATE = 1,
@@ -71,7 +71,7 @@ enum { 
	RET_MMIO_PF_BUG = -1

};



int handle_mmio_page_fault_common(struct kvm_vcpu *vcpu, u64 addr, bool direct);

int handle_mmio_page_fault(struct kvm_vcpu *vcpu, u64 addr, bool direct);

void kvm_init_shadow_mmu(struct kvm_vcpu *vcpu);

void kvm_init_shadow_ept_mmu(struct kvm_vcpu *vcpu, bool execonly);

arch/x86/kvm/paging_tmpl.h

+1 −2
Original line number Diff line number Diff line
@@ -705,8 +705,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code, 
	pgprintk("%s: addr %lx err %x\n", __func__, addr, error_code);



	if (unlikely(error_code & PFERR_RSVD_MASK)) {

		r = handle_mmio_page_fault(vcpu, addr, error_code,

					      mmu_is_nested(vcpu));

		r = handle_mmio_page_fault(vcpu, addr, mmu_is_nested(vcpu));

		if (likely(r != RET_MMIO_PF_INVALID))

			return r;

arch/x86/kvm/vmx.c

+1 −1
Original line number Diff line number Diff line
@@ -5908,7 +5908,7 @@ static int handle_ept_misconfig(struct kvm_vcpu *vcpu) 
		return 1;

	}



	ret = handle_mmio_page_fault_common(vcpu, gpa, true);

	ret = handle_mmio_page_fault(vcpu, gpa, true);

	if (likely(ret == RET_MMIO_PF_EMULATE))

		return x86_emulate_instruction(vcpu, gpa, 0, NULL, 0) ==

					      EMULATE_DONE;