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ANDROID: KVM: arm64: refactor vcpu_read_sys_reg and vcpu_write_sys_reg for hyp use

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Move vcpu_read_sys_reg and vcpu_write_sys_reg to a shared header
to be used by hyp in protected mode.

Refactored as macros to avoid including kvm.h, which would have
been needed for struct vcpu.

No functional change intended.

Signed-off-by: Fuad Tabba <tabba@google.com>
Bug: 209580772
Change-Id: I6b949d60b1cab6aa12978e2f9b775192701990c6
Signed-off-by: Will Deacon <willdeacon@google.com>
This commit is contained in:
Fuad Tabba
2021-11-03 16:53:38 +00:00
committed by Will Deacon
parent ac64a28652
commit 36a84952bc
2 changed files with 23 additions and 23 deletions
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26
arch/arm64/include/asm/kvm_host.h
View File

@@ -502,9 +502,6 @@ struct kvm_vcpu_arch {
#define __vcpu_sys_reg(v,r) (ctxt_sys_reg(&(v)->arch.ctxt, (r)))
u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg);
void vcpu_write_sys_reg(struct kvm_vcpu *vcpu, u64 val, int reg);
static inline bool __vcpu_read_sys_reg_from_cpu(int reg, u64 *val)
{
/*
@@ -596,6 +593,29 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg)
return true;
}
static inline u64 vcpu_arch_read_sys_reg(const struct kvm_vcpu_arch *vcpu_arch, int reg)
{
u64 val = 0x8badf00d8badf00d;
if (is_vhe_hyp_code() && vcpu_arch->sysregs_loaded_on_cpu &&
__vcpu_read_sys_reg_from_cpu(reg, &val))
return val;
return ctxt_sys_reg(&vcpu_arch->ctxt, reg);
}
static inline void vcpu_arch_write_sys_reg(struct kvm_vcpu_arch *vcpu_arch, u64 val, int reg)
{
if (is_vhe_hyp_code() && vcpu_arch->sysregs_loaded_on_cpu &&
__vcpu_write_sys_reg_to_cpu(val, reg))
return;
ctxt_sys_reg(&vcpu_arch->ctxt, reg) = val;
}
#define vcpu_read_sys_reg(vcpu, reg) vcpu_arch_read_sys_reg(&((vcpu)->arch), reg)
#define vcpu_write_sys_reg(vcpu, val, reg) vcpu_arch_write_sys_reg(&((vcpu)->arch), val, reg)
struct kvm_vm_stat {
struct kvm_vm_stat_generic generic;
};

20
arch/arm64/kvm/sys_regs.c
View File

@@ -64,26 +64,6 @@ static bool write_to_read_only(struct kvm_vcpu *vcpu,
return false;
}
u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg)
{
u64 val = 0x8badf00d8badf00d;
if (vcpu->arch.sysregs_loaded_on_cpu &&
__vcpu_read_sys_reg_from_cpu(reg, &val))
return val;
return __vcpu_sys_reg(vcpu, reg);
}
void vcpu_write_sys_reg(struct kvm_vcpu *vcpu, u64 val, int reg)
{
if (vcpu->arch.sysregs_loaded_on_cpu &&
__vcpu_write_sys_reg_to_cpu(val, reg))
return;
__vcpu_sys_reg(vcpu, reg) = val;
}
/* 3 bits per cache level, as per CLIDR, but non-existent caches always 0 */
static u32 cache_levels;