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From: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
To: pbonzini@redhat.com, tsbogend@alpha.franken.de,
	paulus@ozlabs.org, mpe@ellerman.id.au, benh@kernel.crashing.org,
	borntraeger@de.ibm.com, frankja@linux.ibm.com, david@redhat.com,
	cohuck@redhat.com, heiko.carstens@de.ibm.com, gor@linux.ibm.com,
	sean.j.christopherson@intel.com, vkuznets@redhat.com,
	wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org,
	tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
	x86@kernel.org, hpa@zytor.com, maz@kernel.org,
	james.morse@arm.com, julien.thierry.kdev@gmail.com,
	suzuki.poulose@arm.com, christoffer.dall@arm.com,
	peterx@redhat.com, thuth@redhat.com, chenhuacai@gmail.com
Cc: linux-s390@vger.kernel.org, tianjia.zhang@linux.alibaba.com,
	kvm@vger.kernel.org, linux-mips@vger.kernel.org,
	kvm-ppc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, kvmarm@lists.cs.columbia.edu,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 2/5] KVM: arm64: clean up redundant 'kvm_run' parameters
Date: Tue, 23 Jun 2020 21:14:15 +0800
Message-ID: <20200623131418.31473-3-tianjia.zhang@linux.alibaba.com> (raw)
In-Reply-To: <20200623131418.31473-1-tianjia.zhang@linux.alibaba.com>

In the current kvm version, 'kvm_run' has been included in the 'kvm_vcpu'
structure. For historical reasons, many kvm-related function parameters
retain the 'kvm_run' and 'kvm_vcpu' parameters at the same time. This
patch does a unified cleanup of these remaining redundant parameters.

Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 arch/arm64/include/asm/kvm_coproc.h | 12 +++++-----
 arch/arm64/include/asm/kvm_host.h   | 11 ++++-----
 arch/arm64/include/asm/kvm_mmu.h    |  2 +-
 arch/arm64/kvm/arm.c                |  6 ++---
 arch/arm64/kvm/handle_exit.c        | 36 ++++++++++++++---------------
 arch/arm64/kvm/mmio.c               | 11 +++++----
 arch/arm64/kvm/mmu.c                |  5 ++--
 arch/arm64/kvm/sys_regs.c           | 13 +++++------
 8 files changed, 46 insertions(+), 50 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_coproc.h b/arch/arm64/include/asm/kvm_coproc.h
index 0185ee8b8b5e..454373704b8a 100644
--- a/arch/arm64/include/asm/kvm_coproc.h
+++ b/arch/arm64/include/asm/kvm_coproc.h
@@ -27,12 +27,12 @@ struct kvm_sys_reg_target_table {
 void kvm_register_target_sys_reg_table(unsigned int target,
 				       struct kvm_sys_reg_target_table *table);
 
-int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu, struct kvm_run *run);
-int kvm_handle_cp14_32(struct kvm_vcpu *vcpu, struct kvm_run *run);
-int kvm_handle_cp14_64(struct kvm_vcpu *vcpu, struct kvm_run *run);
-int kvm_handle_cp15_32(struct kvm_vcpu *vcpu, struct kvm_run *run);
-int kvm_handle_cp15_64(struct kvm_vcpu *vcpu, struct kvm_run *run);
-int kvm_handle_sys_reg(struct kvm_vcpu *vcpu, struct kvm_run *run);
+int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu);
+int kvm_handle_cp14_32(struct kvm_vcpu *vcpu);
+int kvm_handle_cp14_64(struct kvm_vcpu *vcpu);
+int kvm_handle_cp15_32(struct kvm_vcpu *vcpu);
+int kvm_handle_cp15_64(struct kvm_vcpu *vcpu);
+int kvm_handle_sys_reg(struct kvm_vcpu *vcpu);
 
 #define kvm_coproc_table_init kvm_sys_reg_table_init
 void kvm_sys_reg_table_init(void);
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index c3e6fcc664b1..5c9db5767ba4 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -481,18 +481,15 @@ u64 __kvm_call_hyp(void *hypfn, ...);
 void force_vm_exit(const cpumask_t *mask);
 void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
 
-int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
-		int exception_index);
-void handle_exit_early(struct kvm_vcpu *vcpu, struct kvm_run *run,
-		       int exception_index);
+int handle_exit(struct kvm_vcpu *vcpu, int exception_index);
+void handle_exit_early(struct kvm_vcpu *vcpu, int exception_index);
 
 /* MMIO helpers */
 void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data);
 unsigned long kvm_mmio_read_buf(const void *buf, unsigned int len);
 
-int kvm_handle_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
-int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run *run,
-		 phys_addr_t fault_ipa);
+int kvm_handle_mmio_return(struct kvm_vcpu *vcpu);
+int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa);
 
 int kvm_perf_init(void);
 int kvm_perf_teardown(void);
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index b12bfc1f051a..40be8f6c7351 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -139,7 +139,7 @@ void kvm_free_stage2_pgd(struct kvm *kvm);
 int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa,
 			  phys_addr_t pa, unsigned long size, bool writable);
 
-int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run);
+int kvm_handle_guest_abort(struct kvm_vcpu *vcpu);
 
 void kvm_mmu_free_memory_caches(struct kvm_vcpu *vcpu);
 
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 90cb90561446..985ede7bcca0 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -658,7 +658,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
 		return ret;
 
 	if (run->exit_reason == KVM_EXIT_MMIO) {
-		ret = kvm_handle_mmio_return(vcpu, run);
+		ret = kvm_handle_mmio_return(vcpu);
 		if (ret)
 			return ret;
 	}
@@ -810,11 +810,11 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
 		trace_kvm_exit(ret, kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu));
 
 		/* Exit types that need handling before we can be preempted */
-		handle_exit_early(vcpu, run, ret);
+		handle_exit_early(vcpu, ret);
 
 		preempt_enable();
 
-		ret = handle_exit(vcpu, run, ret);
+		ret = handle_exit(vcpu, ret);
 	}
 
 	/* Tell userspace about in-kernel device output levels */
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c
index 5a02d4c90559..1df3beafd73f 100644
--- a/arch/arm64/kvm/handle_exit.c
+++ b/arch/arm64/kvm/handle_exit.c
@@ -25,7 +25,7 @@
 #define CREATE_TRACE_POINTS
 #include "trace_handle_exit.h"
 
-typedef int (*exit_handle_fn)(struct kvm_vcpu *, struct kvm_run *);
+typedef int (*exit_handle_fn)(struct kvm_vcpu *);
 
 static void kvm_handle_guest_serror(struct kvm_vcpu *vcpu, u32 esr)
 {
@@ -33,7 +33,7 @@ static void kvm_handle_guest_serror(struct kvm_vcpu *vcpu, u32 esr)
 		kvm_inject_vabt(vcpu);
 }
 
-static int handle_hvc(struct kvm_vcpu *vcpu, struct kvm_run *run)
+static int handle_hvc(struct kvm_vcpu *vcpu)
 {
 	int ret;
 
@@ -50,7 +50,7 @@ static int handle_hvc(struct kvm_vcpu *vcpu, struct kvm_run *run)
 	return ret;
 }
 
-static int handle_smc(struct kvm_vcpu *vcpu, struct kvm_run *run)
+static int handle_smc(struct kvm_vcpu *vcpu)
 {
 	/*
 	 * "If an SMC instruction executed at Non-secure EL1 is
@@ -69,7 +69,7 @@ static int handle_smc(struct kvm_vcpu *vcpu, struct kvm_run *run)
  * Guest access to FP/ASIMD registers are routed to this handler only
  * when the system doesn't support FP/ASIMD.
  */
-static int handle_no_fpsimd(struct kvm_vcpu *vcpu, struct kvm_run *run)
+static int handle_no_fpsimd(struct kvm_vcpu *vcpu)
 {
 	kvm_inject_undefined(vcpu);
 	return 1;
@@ -87,7 +87,7 @@ static int handle_no_fpsimd(struct kvm_vcpu *vcpu, struct kvm_run *run)
  * world-switches and schedule other host processes until there is an
  * incoming IRQ or FIQ to the VM.
  */
-static int kvm_handle_wfx(struct kvm_vcpu *vcpu, struct kvm_run *run)
+static int kvm_handle_wfx(struct kvm_vcpu *vcpu)
 {
 	if (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WFx_ISS_WFE) {
 		trace_kvm_wfx_arm64(*vcpu_pc(vcpu), true);
@@ -109,16 +109,16 @@ static int kvm_handle_wfx(struct kvm_vcpu *vcpu, struct kvm_run *run)
  * kvm_handle_guest_debug - handle a debug exception instruction
  *
  * @vcpu:	the vcpu pointer
- * @run:	access to the kvm_run structure for results
  *
  * We route all debug exceptions through the same handler. If both the
  * guest and host are using the same debug facilities it will be up to
  * userspace to re-inject the correct exception for guest delivery.
  *
- * @return: 0 (while setting run->exit_reason), -1 for error
+ * @return: 0 (while setting vcpu->run->exit_reason), -1 for error
  */
-static int kvm_handle_guest_debug(struct kvm_vcpu *vcpu, struct kvm_run *run)
+static int kvm_handle_guest_debug(struct kvm_vcpu *vcpu)
 {
+	struct kvm_run *run = vcpu->run;
 	u32 hsr = kvm_vcpu_get_hsr(vcpu);
 	int ret = 0;
 
@@ -144,7 +144,7 @@ static int kvm_handle_guest_debug(struct kvm_vcpu *vcpu, struct kvm_run *run)
 	return ret;
 }
 
-static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu, struct kvm_run *run)
+static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu)
 {
 	u32 hsr = kvm_vcpu_get_hsr(vcpu);
 
@@ -155,7 +155,7 @@ static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu, struct kvm_run *run)
 	return 1;
 }
 
-static int handle_sve(struct kvm_vcpu *vcpu, struct kvm_run *run)
+static int handle_sve(struct kvm_vcpu *vcpu)
 {
 	/* Until SVE is supported for guests: */
 	kvm_inject_undefined(vcpu);
@@ -167,7 +167,7 @@ static int handle_sve(struct kvm_vcpu *vcpu, struct kvm_run *run)
  * a NOP). If we get here, it is that we didn't fixup ptrauth on exit, and all
  * that we can do is give the guest an UNDEF.
  */
-static int kvm_handle_ptrauth(struct kvm_vcpu *vcpu, struct kvm_run *run)
+static int kvm_handle_ptrauth(struct kvm_vcpu *vcpu)
 {
 	kvm_inject_undefined(vcpu);
 	return 1;
@@ -212,7 +212,7 @@ static exit_handle_fn kvm_get_exit_handler(struct kvm_vcpu *vcpu)
  * KVM_EXIT_DEBUG, otherwise userspace needs to complete its
  * emulation first.
  */
-static int handle_trap_exceptions(struct kvm_vcpu *vcpu, struct kvm_run *run)
+static int handle_trap_exceptions(struct kvm_vcpu *vcpu)
 {
 	int handled;
 
@@ -227,7 +227,7 @@ static int handle_trap_exceptions(struct kvm_vcpu *vcpu, struct kvm_run *run)
 		exit_handle_fn exit_handler;
 
 		exit_handler = kvm_get_exit_handler(vcpu);
-		handled = exit_handler(vcpu, run);
+		handled = exit_handler(vcpu);
 	}
 
 	return handled;
@@ -237,9 +237,10 @@ static int handle_trap_exceptions(struct kvm_vcpu *vcpu, struct kvm_run *run)
  * Return > 0 to return to guest, < 0 on error, 0 (and set exit_reason) on
  * proper exit to userspace.
  */
-int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
-		       int exception_index)
+int handle_exit(struct kvm_vcpu *vcpu, int exception_index)
 {
+	struct kvm_run *run = vcpu->run;
+
 	if (ARM_SERROR_PENDING(exception_index)) {
 		u8 hsr_ec = ESR_ELx_EC(kvm_vcpu_get_hsr(vcpu));
 
@@ -265,7 +266,7 @@ int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
 	case ARM_EXCEPTION_EL1_SERROR:
 		return 1;
 	case ARM_EXCEPTION_TRAP:
-		return handle_trap_exceptions(vcpu, run);
+		return handle_trap_exceptions(vcpu);
 	case ARM_EXCEPTION_HYP_GONE:
 		/*
 		 * EL2 has been reset to the hyp-stub. This happens when a guest
@@ -289,8 +290,7 @@ int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
 }
 
 /* For exit types that need handling before we can be preempted */
-void handle_exit_early(struct kvm_vcpu *vcpu, struct kvm_run *run,
-		       int exception_index)
+void handle_exit_early(struct kvm_vcpu *vcpu, int exception_index)
 {
 	if (ARM_SERROR_PENDING(exception_index)) {
 		if (this_cpu_has_cap(ARM64_HAS_RAS_EXTN)) {
diff --git a/arch/arm64/kvm/mmio.c b/arch/arm64/kvm/mmio.c
index 4e0366759726..158fbe682611 100644
--- a/arch/arm64/kvm/mmio.c
+++ b/arch/arm64/kvm/mmio.c
@@ -77,9 +77,8 @@ unsigned long kvm_mmio_read_buf(const void *buf, unsigned int len)
  *			     or in-kernel IO emulation
  *
  * @vcpu: The VCPU pointer
- * @run:  The VCPU run struct containing the mmio data
  */
-int kvm_handle_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run)
+int kvm_handle_mmio_return(struct kvm_vcpu *vcpu)
 {
 	unsigned long data;
 	unsigned int len;
@@ -92,6 +91,8 @@ int kvm_handle_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run)
 	vcpu->mmio_needed = 0;
 
 	if (!kvm_vcpu_dabt_iswrite(vcpu)) {
+		struct kvm_run *run = vcpu->run;
+
 		len = kvm_vcpu_dabt_get_as(vcpu);
 		data = kvm_mmio_read_buf(run->mmio.data, len);
 
@@ -119,9 +120,9 @@ int kvm_handle_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run)
 	return 0;
 }
 
-int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run *run,
-		 phys_addr_t fault_ipa)
+int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa)
 {
+	struct kvm_run *run = vcpu->run;
 	unsigned long data;
 	unsigned long rt;
 	int ret;
@@ -188,7 +189,7 @@ int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run *run,
 		if (!is_write)
 			memcpy(run->mmio.data, data_buf, len);
 		vcpu->stat.mmio_exit_kernel++;
-		kvm_handle_mmio_return(vcpu, run);
+		kvm_handle_mmio_return(vcpu);
 		return 1;
 	}
 
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 8c0035cab6b6..d96cf4c6c8db 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -2049,7 +2049,6 @@ static void handle_access_fault(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa)
 /**
  * kvm_handle_guest_abort - handles all 2nd stage aborts
  * @vcpu:	the VCPU pointer
- * @run:	the kvm_run structure
  *
  * Any abort that gets to the host is almost guaranteed to be caused by a
  * missing second stage translation table entry, which can mean that either the
@@ -2058,7 +2057,7 @@ static void handle_access_fault(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa)
  * space. The distinction is based on the IPA causing the fault and whether this
  * memory region has been registered as standard RAM by user space.
  */
-int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run)
+int kvm_handle_guest_abort(struct kvm_vcpu *vcpu)
 {
 	unsigned long fault_status;
 	phys_addr_t fault_ipa;
@@ -2137,7 +2136,7 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run)
 		 * of the page size.
 		 */
 		fault_ipa |= kvm_vcpu_get_hfar(vcpu) & ((1 << 12) - 1);
-		ret = io_mem_abort(vcpu, run, fault_ipa);
+		ret = io_mem_abort(vcpu, fault_ipa);
 		goto out_unlock;
 	}
 
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index baf5ce9225ce..c7a856913de8 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -2156,7 +2156,7 @@ static const struct sys_reg_desc *find_reg(const struct sys_reg_params *params,
 	return bsearch((void *)pval, table, num, sizeof(table[0]), match_sys_reg);
 }
 
-int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu, struct kvm_run *run)
+int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu)
 {
 	kvm_inject_undefined(vcpu);
 	return 1;
@@ -2335,7 +2335,7 @@ static int kvm_handle_cp_32(struct kvm_vcpu *vcpu,
 	return 1;
 }
 
-int kvm_handle_cp15_64(struct kvm_vcpu *vcpu, struct kvm_run *run)
+int kvm_handle_cp15_64(struct kvm_vcpu *vcpu)
 {
 	const struct sys_reg_desc *target_specific;
 	size_t num;
@@ -2346,7 +2346,7 @@ int kvm_handle_cp15_64(struct kvm_vcpu *vcpu, struct kvm_run *run)
 				target_specific, num);
 }
 
-int kvm_handle_cp15_32(struct kvm_vcpu *vcpu, struct kvm_run *run)
+int kvm_handle_cp15_32(struct kvm_vcpu *vcpu)
 {
 	const struct sys_reg_desc *target_specific;
 	size_t num;
@@ -2357,14 +2357,14 @@ int kvm_handle_cp15_32(struct kvm_vcpu *vcpu, struct kvm_run *run)
 				target_specific, num);
 }
 
-int kvm_handle_cp14_64(struct kvm_vcpu *vcpu, struct kvm_run *run)
+int kvm_handle_cp14_64(struct kvm_vcpu *vcpu)
 {
 	return kvm_handle_cp_64(vcpu,
 				cp14_64_regs, ARRAY_SIZE(cp14_64_regs),
 				NULL, 0);
 }
 
-int kvm_handle_cp14_32(struct kvm_vcpu *vcpu, struct kvm_run *run)
+int kvm_handle_cp14_32(struct kvm_vcpu *vcpu)
 {
 	return kvm_handle_cp_32(vcpu,
 				cp14_regs, ARRAY_SIZE(cp14_regs),
@@ -2416,9 +2416,8 @@ static void reset_sys_reg_descs(struct kvm_vcpu *vcpu,
 /**
  * kvm_handle_sys_reg -- handles a mrs/msr trap on a guest sys_reg access
  * @vcpu: The VCPU pointer
- * @run:  The kvm_run struct
  */
-int kvm_handle_sys_reg(struct kvm_vcpu *vcpu, struct kvm_run *run)
+int kvm_handle_sys_reg(struct kvm_vcpu *vcpu)
 {
 	struct sys_reg_params params;
 	unsigned long esr = kvm_vcpu_get_hsr(vcpu);
-- 
2.17.1

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  parent reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-23 13:14 [PATCH v6 0/5] " Tianjia Zhang
2020-06-23 13:14 ` [PATCH v6 1/5] KVM: s390: " Tianjia Zhang
2020-06-23 15:31   ` Christian Borntraeger
2020-06-24  2:39     ` Tianjia Zhang
2020-07-10  7:48     ` Paolo Bonzini
2020-06-23 13:14 ` Tianjia Zhang [this message]
2020-06-23 13:14 ` [PATCH v6 3/5] KVM: PPC: clean up redundant kvm_run parameters in assembly Tianjia Zhang
2020-07-10  7:57   ` Paolo Bonzini
2020-07-23  6:19   ` Paul Mackerras
2020-06-23 13:14 ` [PATCH v6 4/5] KVM: MIPS: clean up redundant 'kvm_run' parameters Tianjia Zhang
2020-06-23 13:14 ` [PATCH v6 5/5] KVM: MIPS: clean up redundant kvm_run parameters in assembly Tianjia Zhang
2020-07-10  7:32 ` [PATCH v6 0/5] clean up redundant 'kvm_run' parameters Tianjia Zhang
2020-07-10  8:06   ` Paolo Bonzini

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