[PATCH v3 2/7] KVM: arm64: clean up redundant 'kvm_run' parameters

From: Tianjia Zhang
Date: Sun Apr 26 2020 - 08:39:47 EST

In the current kvm version, 'kvm_run' has been included in the 'kvm_vcpu'
structure. Earlier than 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@xxxxxxxxxxxxxxxxx>
---
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/handle_exit.c | 36 ++++++++++++++---------------
arch/arm64/kvm/sys_regs.c | 13 +++++------
virt/kvm/arm/arm.c | 6 ++---
virt/kvm/arm/mmio.c | 11 +++++----
virt/kvm/arm/mmu.c | 5 ++--
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 32c8a675e5a4..3fab32e4948c 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 30b0e8d6b895..2ec7b9bb25d3 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -159,7 +159,7 @@ 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/handle_exit.c b/arch/arm64/kvm/handle_exit.c
index aacfc55de44c..ec3a66642ea5 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.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);
@@ -193,7 +193,7 @@ void kvm_arm_vcpu_ptrauth_trap(struct kvm_vcpu *vcpu)
* Guest usage of a ptrauth instruction (which the guest EL1 did not turn into
* a NOP).
*/
-static int kvm_handle_ptrauth(struct kvm_vcpu *vcpu, struct kvm_run *run)
+static int kvm_handle_ptrauth(struct kvm_vcpu *vcpu)
{
kvm_arm_vcpu_ptrauth_trap(vcpu);
return 1;
@@ -238,7 +238,7 @@ 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;

@@ -253,7 +253,7 @@ 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;
@@ -263,9 +263,10 @@ 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));

@@ -291,7 +292,7 @@ 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
@@ -315,8 +316,7 @@ 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/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 51db934702b6..e5a0d0d676c8 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -2116,7 +2116,7 @@ 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;
@@ -2295,7 +2295,7 @@ 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;
@@ -2306,7 +2306,7 @@ 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;
@@ -2317,14 +2317,14 @@ 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),
@@ -2382,9 +2382,8 @@ 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);
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index f5390ac2165b..dbeb20804a75 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -659,7 +659,7 @@ 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;
}
@@ -811,11 +811,11 @@ 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/virt/kvm/arm/mmio.c b/virt/kvm/arm/mmio.c
index aedfcff99ac5..41ef5c5dbc62 100644
--- a/virt/kvm/arm/mmio.c
+++ b/virt/kvm/arm/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/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index e3b9ee268823..c5dc58226b5b 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -1892,7 +1892,6 @@ 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
@@ -1901,7 +1900,7 @@ 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;
@@ -1980,7 +1979,7 @@ 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;
}

--
2.17.1