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LoongArch: Adjust time routines for 32BIT/64BIT

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Adjust time routines for both 32BIT and 64BIT, including: rdtime_h() /
rdtime_l() definitions for 32BIT and rdtime_d() definition for 64BIT,
get_cycles() and get_cycles64() definitions for 32BIT/64BIT, show time
frequency info ("CPU MHz" and "BogoMIPS") in /proc/cpuinfo, etc.

Use do_div() for division which works on both 32BIT and 64BIT platforms.

Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Huacai Chen
2025-12-08 18:09:17 +08:00
parent 4ad04e7c7e
commit ced7814d3a
6 changed files with 80 additions and 17 deletions
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5
arch/loongarch/kvm/vcpu.c
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@@ -9,6 +9,7 @@
#include <asm/loongarch.h>
#include <asm/setup.h>
#include <asm/time.h>
#include <asm/timex.h>
#define CREATE_TRACE_POINTS
#include "trace.h"
@@ -811,7 +812,7 @@ static int kvm_get_one_reg(struct kvm_vcpu *vcpu,
case KVM_REG_LOONGARCH_KVM:
switch (reg->id) {
case KVM_REG_LOONGARCH_COUNTER:
*v = drdtime() + vcpu->kvm->arch.time_offset;
*v = get_cycles() + vcpu->kvm->arch.time_offset;
break;
case KVM_REG_LOONGARCH_DEBUG_INST:
*v = INSN_HVCL | KVM_HCALL_SWDBG;
@@ -906,7 +907,7 @@ static int kvm_set_one_reg(struct kvm_vcpu *vcpu,
* only set for the first time for smp system
*/
if (vcpu->vcpu_id == 0)
vcpu->kvm->arch.time_offset = (signed long)(v - drdtime());
vcpu->kvm->arch.time_offset = (signed long)(v - get_cycles());
break;
case KVM_REG_LOONGARCH_VCPU_RESET:
vcpu->arch.st.guest_addr = 0;