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KVM: arm64: Remove hyp_panic arguments 

hyp_panic is able to find all the context it needs from within itself so
remove the argument. The __hyp_panic wrapper becomes redundant so is
also removed.

Signed-off-by: Andrew Scull <ascull@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200915104643.2543892-3-ascull@google.com
This commit is contained in:
Andrew Scull 2020-09-15 11:46:26 +01:00 committed by Marc Zyngier
parent 501a67a25d
commit 6a0259ed29
5 changed files with 15 additions and 16 deletions
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2
arch/arm64/include/asm/kvm_hyp.h
View File

@ -89,7 +89,7 @@ void deactivate_traps_vhe_put(void);
u64 __guest_enter(struct kvm_vcpu *vcpu, struct kvm_cpu_context *host_ctxt);
void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt);
void __noreturn hyp_panic(void);
#ifdef __KVM_NVHE_HYPERVISOR__
void __noreturn __hyp_do_panic(unsigned long, ...);
#endif

7
arch/arm64/kvm/hyp/hyp-entry.S
View File

@ -210,12 +210,7 @@ SYM_FUNC_START(__hyp_do_panic)
SYM_FUNC_END(__hyp_do_panic)
#endif
SYM_CODE_START(__hyp_panic)
get_host_ctxt x0, x1
b hyp_panic
SYM_CODE_END(__hyp_panic)
.macro invalid_vector label, target = __hyp_panic
.macro invalid_vector label, target = hyp_panic
.align 2
SYM_CODE_START(\label)
b \target

4
arch/arm64/kvm/hyp/include/hyp/switch.h
View File

@ -510,13 +510,11 @@ static inline void __set_host_arch_workaround_state(struct kvm_vcpu *vcpu)
static inline void __kvm_unexpected_el2_exception(void)
{
unsigned long addr, fixup;
struct kvm_cpu_context *host_ctxt;
struct exception_table_entry *entry, *end;
unsigned long elr_el2 = read_sysreg(elr_el2);
entry = hyp_symbol_addr(__start___kvm_ex_table);
end = hyp_symbol_addr(__stop___kvm_ex_table);
host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
while (entry < end) {
addr = (unsigned long)&entry->insn + entry->insn;
@ -531,7 +529,7 @@ static inline void __kvm_unexpected_el2_exception(void)
return;
}
hyp_panic(host_ctxt);
hyp_panic();
}
#endif /* __ARM64_KVM_HYP_SWITCH_H__ */

8
arch/arm64/kvm/hyp/nvhe/switch.c
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@ -242,14 +242,18 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu)
return exit_code;
}
void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt)
void __noreturn hyp_panic(void)
{
u64 spsr = read_sysreg_el2(SYS_SPSR);
u64 elr = read_sysreg_el2(SYS_ELR);
u64 par = read_sysreg(par_el1);
struct kvm_vcpu *vcpu = host_ctxt->__hyp_running_vcpu;
struct kvm_cpu_context *host_ctxt;
struct kvm_vcpu *vcpu;
unsigned long str_va;
host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
vcpu = host_ctxt->__hyp_running_vcpu;
if (read_sysreg(vttbr_el2)) {
__timer_disable_traps(vcpu);
__deactivate_traps(vcpu);

10
arch/arm64/kvm/hyp/vhe/switch.c
View File

@ -192,10 +192,12 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu)
return ret;
}
static void __hyp_call_panic(u64 spsr, u64 elr, u64 par,
struct kvm_cpu_context *host_ctxt)
static void __hyp_call_panic(u64 spsr, u64 elr, u64 par)
{
struct kvm_cpu_context *host_ctxt;
struct kvm_vcpu *vcpu;
host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
vcpu = host_ctxt->__hyp_running_vcpu;
__deactivate_traps(vcpu);
@ -208,13 +210,13 @@ static void __hyp_call_panic(u64 spsr, u64 elr, u64 par,
}
NOKPROBE_SYMBOL(__hyp_call_panic);
void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt)
void __noreturn hyp_panic(void)
{
u64 spsr = read_sysreg_el2(SYS_SPSR);
u64 elr = read_sysreg_el2(SYS_ELR);
u64 par = read_sysreg(par_el1);
__hyp_call_panic(spsr, elr, par, host_ctxt);
__hyp_call_panic(spsr, elr, par);
unreachable();
}