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Message-ID: <CAAhV-H4N2wdB8n7Pindv9WdVPLPOboK0Ys75SWOkMZU+=NWEbQ@mail.gmail.com>
Date: Fri, 14 Jul 2023 17:22:30 +0800
From: Huacai Chen <chenhuacai@...nel.org>
To: bibo mao <maobibo@...ngson.cn>
Cc: Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
kvm@...r.kernel.org, WANG Xuerui <kernel@...0n.name>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
loongarch@...ts.linux.dev, Jens Axboe <axboe@...nel.dk>,
Mark Brown <broonie@...nel.org>,
Oliver Upton <oliver.upton@...ux.dev>,
Xi Ruoyao <xry111@...111.site>, hejinyang@...ngson.cn,
Tianrui Zhao <zhaotianrui@...ngson.cn>
Subject: Re: [PATCH v16 05/30] LoongArch: KVM: Add vcpu related header files
Hi, Bibo,
On Fri, Jul 14, 2023 at 3:45 PM bibo mao <maobibo@...ngson.cn> wrote:
>
>
>
> 在 2023/7/14 15:11, Huacai Chen 写道:
> > Hi, Tianrui,
> >
> > On Thu, Jun 29, 2023 at 3:55 PM Tianrui Zhao <zhaotianrui@...ngson.cn> wrote:
> >>
> >> Add LoongArch vcpu related header files, including vcpu csr
> >> information, irq number defines, and some vcpu interfaces.
> >>
> >> Reviewed-by: Bibo Mao <maobibo@...ngson.cn>
> >> Signed-off-by: Tianrui Zhao <zhaotianrui@...ngson.cn>
> >> ---
> >> arch/loongarch/include/asm/insn-def.h | 55 ++++++
> >> arch/loongarch/include/asm/kvm_csr.h | 231 +++++++++++++++++++++++++
> >> arch/loongarch/include/asm/kvm_vcpu.h | 97 +++++++++++
> >> arch/loongarch/include/asm/loongarch.h | 20 ++-
> >> arch/loongarch/kvm/trace.h | 168 ++++++++++++++++++
> >> 5 files changed, 566 insertions(+), 5 deletions(-)
> >> create mode 100644 arch/loongarch/include/asm/insn-def.h
> >> create mode 100644 arch/loongarch/include/asm/kvm_csr.h
> >> create mode 100644 arch/loongarch/include/asm/kvm_vcpu.h
> >> create mode 100644 arch/loongarch/kvm/trace.h
> >>
> >> diff --git a/arch/loongarch/include/asm/insn-def.h b/arch/loongarch/include/asm/insn-def.h
> >> new file mode 100644
> >> index 000000000000..e285ee108fb0
> >> --- /dev/null
> >> +++ b/arch/loongarch/include/asm/insn-def.h
> >> @@ -0,0 +1,55 @@
> >> +/* SPDX-License-Identifier: GPL-2.0-only */
> >> +
> >> +#ifndef __ASM_INSN_DEF_H
> >> +#define __ASM_INSN_DEF_H
> >> +
> >> +#include <linux/stringify.h>
> >> +#include <asm/gpr-num.h>
> >> +#include <asm/asm.h>
> >> +
> >> +#define INSN_STR(x) __stringify(x)
> >> +#define CSR_RD_SHIFT 0
> >> +#define CSR_RJ_SHIFT 5
> >> +#define CSR_SIMM14_SHIFT 10
> >> +#define CSR_OPCODE_SHIFT 24
> > As all needed instructions have already upstream in binutils now and
> > binutils 2.41 will be released soon, I suggest again to introduce
> > AS_HAS_LVZ_EXTENSION and make KVM depend on AS_HAS_LVZ_EXTENSION.
> It is a good news that binutils 2.41 has supported LVZ assemble language.
> we will add AS_HAS_LVZ_EXTENSION support, however KVM need not depend on
> AS_HAS_LVZ_EXTENSION since bintuils 2.41 is not popularly used. yeap we
> need write beautiful code, also we should write code with pratical usage.
1, For pure upstream: the CI toolchain comes from
https://mirrors.edge.kernel.org/pub/tools/crosstool/. Since binutils
2.41 will be released soon, CI toolchain will also be updated soon.
2, For community distributions, such as Fedora rawhide, Debian
unstable and Arch: they usually choose the latest released version, so
binutils 2.41 will be used quickly.
3, For downstream distributions, such as UOS and Kylin: if they choose
kernel as new as 6.6, they may probably choose binutils as new as
2.41; if they choose an LTS kernel (e.g., 6.1), they should backport
KVM support to the kernel, then they don't have any reason to not
backport LVZ instructions support to binutils.
Huacai
>
> Paolo, what is your suggestion?
>
> x86 has similar binary assemble code like this:
> static inline void __tpause(u32 ecx, u32 edx, u32 eax)
> {
> /* "tpause %ecx, %edx, %eax;" */
> #ifdef CONFIG_AS_TPAUSE
> asm volatile("tpause %%ecx\n"
> :
> : "c"(ecx), "d"(edx), "a"(eax));
> #else
> asm volatile(".byte 0x66, 0x0f, 0xae, 0xf1\t\n"
> :
> : "c"(ecx), "d"(edx), "a"(eax));
> #endif
> }
>
> Also riscv has similiar code:
> void kvm_riscv_local_hfence_gvma_vmid_all(unsigned long vmid)
> {
> asm volatile(HFENCE_GVMA(zero, %0) : : "r" (vmid) : "memory");
> }
>
> Regards
> Bibo Mao
> >
> > And this is easier than I suggested before (introduce
> > CC_HAS_LVZ_EXTENSION), because CC_HAS_XXX depends on both gcc and
> > binutils, but AS_HAS_XXX only depends on binutils.
> >
> > Huacai
> >
> >> +
> >> +#define DEFINE_INSN_CSR \
> >> + __DEFINE_ASM_GPR_NUMS \
> >> +" .macro insn_csr, opcode, rj, rd, simm14\n" \
> >> +" .4byte ((\\opcode << " INSN_STR(CSR_OPCODE_SHIFT) ") |" \
> >> +" (.L__gpr_num_\\rj << " INSN_STR(CSR_RJ_SHIFT) ") |" \
> >> +" (.L__gpr_num_\\rd << " INSN_STR(CSR_RD_SHIFT) ") |" \
> >> +" (\\simm14 << " INSN_STR(CSR_SIMM14_SHIFT) "))\n" \
> >> +" .endm\n"
> >> +
> >> +#define UNDEFINE_INSN_CSR \
> >> +" .purgem insn_csr\n"
> >> +
> >> +#define __INSN_CSR(opcode, rj, rd, simm14) \
> >> + DEFINE_INSN_CSR \
> >> + "insn_csr " opcode ", " rj ", " rd ", " simm14 "\n" \
> >> + UNDEFINE_INSN_CSR
> >> +
> >> +
> >> +#define INSN_CSR(opcode, rj, rd, simm14) \
> >> + __INSN_CSR(LARCH_##opcode, LARCH_##rj, LARCH_##rd, \
> >> + LARCH_##simm14)
> >> +
> >> +#define __ASM_STR(x) #x
> >> +#define LARCH_OPCODE(v) __ASM_STR(v)
> >> +#define LARCH_SIMM14(v) __ASM_STR(v)
> >> +#define __LARCH_REG(v) __ASM_STR(v)
> >> +#define LARCH___RD(v) __LARCH_REG(v)
> >> +#define LARCH___RJ(v) __LARCH_REG(v)
> >> +#define LARCH_OPCODE_GCSR LARCH_OPCODE(5)
> >> +
> >> +#define GCSR_read(csr, rd) \
> >> + INSN_CSR(OPCODE_GCSR, __RJ(zero), __RD(rd), SIMM14(csr))
> >> +
> >> +#define GCSR_write(csr, rd) \
> >> + INSN_CSR(OPCODE_GCSR, __RJ($r1), __RD(rd), SIMM14(csr))
> >> +
> >> +#define GCSR_xchg(csr, rj, rd) \
> >> + INSN_CSR(OPCODE_GCSR, __RJ(rj), __RD(rd), SIMM14(csr))
> >> +
> >> +#endif /* __ASM_INSN_DEF_H */
> >> diff --git a/arch/loongarch/include/asm/kvm_csr.h b/arch/loongarch/include/asm/kvm_csr.h
> >> new file mode 100644
> >> index 000000000000..10dba5bc6df1
> >> --- /dev/null
> >> +++ b/arch/loongarch/include/asm/kvm_csr.h
> >> @@ -0,0 +1,231 @@
> >> +/* SPDX-License-Identifier: GPL-2.0 */
> >> +/*
> >> + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
> >> + */
> >> +
> >> +#ifndef __ASM_LOONGARCH_KVM_CSR_H__
> >> +#define __ASM_LOONGARCH_KVM_CSR_H__
> >> +#include <asm/loongarch.h>
> >> +#include <asm/kvm_vcpu.h>
> >> +#include <linux/uaccess.h>
> >> +#include <linux/kvm_host.h>
> >> +
> >> +/*
> >> + * Instructions will be available in binutils later
> >> + * read val from guest csr register %[csr]
> >> + * gcsrrd %[val], %[csr]
> >> + */
> >> +#define gcsr_read(csr) \
> >> +({ \
> >> + register unsigned long __v; \
> >> + __asm__ __volatile__ (GCSR_read(csr, %0) \
> >> + : "=r" (__v) : \
> >> + : "memory"); \
> >> + __v; \
> >> +})
> >> +
> >> +/*
> >> + * Instructions will be available in binutils later
> >> + * write val to guest csr register %[csr]
> >> + * gcsrwr %[val], %[csr]
> >> + */
> >> +#define gcsr_write(val, csr) \
> >> +({ \
> >> + register unsigned long __v = val; \
> >> + __asm__ __volatile__ (GCSR_write(csr, %0) \
> >> + : "+r" (__v) : \
> >> + : "memory"); \
> >> +})
> >> +
> >> +/*
> >> + * Instructions will be available in binutils later
> >> + * replace masked bits of guest csr register %[csr] with val
> >> + * gcsrxchg %[val], %[mask], %[csr]
> >> + */
> >> +#define gcsr_xchg(val, mask, csr) \
> >> +({ \
> >> + register unsigned long __v = val; \
> >> + __asm__ __volatile__ (GCSR_xchg(csr, %1, %0) \
> >> + : "+r" (__v) \
> >> + : "r" (mask) \
> >> + : "memory"); \
> >> + __v; \
> >> +})
> >> +
> >> +/* Guest CSRS read and write */
> >> +#define read_gcsr_crmd() gcsr_read(LOONGARCH_CSR_CRMD)
> >> +#define write_gcsr_crmd(val) gcsr_write(val, LOONGARCH_CSR_CRMD)
> >> +#define read_gcsr_prmd() gcsr_read(LOONGARCH_CSR_PRMD)
> >> +#define write_gcsr_prmd(val) gcsr_write(val, LOONGARCH_CSR_PRMD)
> >> +#define read_gcsr_euen() gcsr_read(LOONGARCH_CSR_EUEN)
> >> +#define write_gcsr_euen(val) gcsr_write(val, LOONGARCH_CSR_EUEN)
> >> +#define read_gcsr_misc() gcsr_read(LOONGARCH_CSR_MISC)
> >> +#define write_gcsr_misc(val) gcsr_write(val, LOONGARCH_CSR_MISC)
> >> +#define read_gcsr_ecfg() gcsr_read(LOONGARCH_CSR_ECFG)
> >> +#define write_gcsr_ecfg(val) gcsr_write(val, LOONGARCH_CSR_ECFG)
> >> +#define read_gcsr_estat() gcsr_read(LOONGARCH_CSR_ESTAT)
> >> +#define write_gcsr_estat(val) gcsr_write(val, LOONGARCH_CSR_ESTAT)
> >> +#define read_gcsr_era() gcsr_read(LOONGARCH_CSR_ERA)
> >> +#define write_gcsr_era(val) gcsr_write(val, LOONGARCH_CSR_ERA)
> >> +#define read_gcsr_badv() gcsr_read(LOONGARCH_CSR_BADV)
> >> +#define write_gcsr_badv(val) gcsr_write(val, LOONGARCH_CSR_BADV)
> >> +#define read_gcsr_badi() gcsr_read(LOONGARCH_CSR_BADI)
> >> +#define write_gcsr_badi(val) gcsr_write(val, LOONGARCH_CSR_BADI)
> >> +#define read_gcsr_eentry() gcsr_read(LOONGARCH_CSR_EENTRY)
> >> +#define write_gcsr_eentry(val) gcsr_write(val, LOONGARCH_CSR_EENTRY)
> >> +
> >> +#define read_gcsr_tlbidx() gcsr_read(LOONGARCH_CSR_TLBIDX)
> >> +#define write_gcsr_tlbidx(val) gcsr_write(val, LOONGARCH_CSR_TLBIDX)
> >> +#define read_gcsr_tlbhi() gcsr_read(LOONGARCH_CSR_TLBEHI)
> >> +#define write_gcsr_tlbhi(val) gcsr_write(val, LOONGARCH_CSR_TLBEHI)
> >> +#define read_gcsr_tlblo0() gcsr_read(LOONGARCH_CSR_TLBELO0)
> >> +#define write_gcsr_tlblo0(val) gcsr_write(val, LOONGARCH_CSR_TLBELO0)
> >> +#define read_gcsr_tlblo1() gcsr_read(LOONGARCH_CSR_TLBELO1)
> >> +#define write_gcsr_tlblo1(val) gcsr_write(val, LOONGARCH_CSR_TLBELO1)
> >> +
> >> +#define read_gcsr_asid() gcsr_read(LOONGARCH_CSR_ASID)
> >> +#define write_gcsr_asid(val) gcsr_write(val, LOONGARCH_CSR_ASID)
> >> +#define read_gcsr_pgdl() gcsr_read(LOONGARCH_CSR_PGDL)
> >> +#define write_gcsr_pgdl(val) gcsr_write(val, LOONGARCH_CSR_PGDL)
> >> +#define read_gcsr_pgdh() gcsr_read(LOONGARCH_CSR_PGDH)
> >> +#define write_gcsr_pgdh(val) gcsr_write(val, LOONGARCH_CSR_PGDH)
> >> +#define write_gcsr_pgd(val) gcsr_write(val, LOONGARCH_CSR_PGD)
> >> +#define read_gcsr_pgd() gcsr_read(LOONGARCH_CSR_PGD)
> >> +#define read_gcsr_pwctl0() gcsr_read(LOONGARCH_CSR_PWCTL0)
> >> +#define write_gcsr_pwctl0(val) gcsr_write(val, LOONGARCH_CSR_PWCTL0)
> >> +#define read_gcsr_pwctl1() gcsr_read(LOONGARCH_CSR_PWCTL1)
> >> +#define write_gcsr_pwctl1(val) gcsr_write(val, LOONGARCH_CSR_PWCTL1)
> >> +#define read_gcsr_stlbpgsize() gcsr_read(LOONGARCH_CSR_STLBPGSIZE)
> >> +#define write_gcsr_stlbpgsize(val) gcsr_write(val, LOONGARCH_CSR_STLBPGSIZE)
> >> +#define read_gcsr_rvacfg() gcsr_read(LOONGARCH_CSR_RVACFG)
> >> +#define write_gcsr_rvacfg(val) gcsr_write(val, LOONGARCH_CSR_RVACFG)
> >> +
> >> +#define read_gcsr_cpuid() gcsr_read(LOONGARCH_CSR_CPUID)
> >> +#define write_gcsr_cpuid(val) gcsr_write(val, LOONGARCH_CSR_CPUID)
> >> +#define read_gcsr_prcfg1() gcsr_read(LOONGARCH_CSR_PRCFG1)
> >> +#define write_gcsr_prcfg1(val) gcsr_write(val, LOONGARCH_CSR_PRCFG1)
> >> +#define read_gcsr_prcfg2() gcsr_read(LOONGARCH_CSR_PRCFG2)
> >> +#define write_gcsr_prcfg2(val) gcsr_write(val, LOONGARCH_CSR_PRCFG2)
> >> +#define read_gcsr_prcfg3() gcsr_read(LOONGARCH_CSR_PRCFG3)
> >> +#define write_gcsr_prcfg3(val) gcsr_write(val, LOONGARCH_CSR_PRCFG3)
> >> +
> >> +#define read_gcsr_kscratch0() gcsr_read(LOONGARCH_CSR_KS0)
> >> +#define write_gcsr_kscratch0(val) gcsr_write(val, LOONGARCH_CSR_KS0)
> >> +#define read_gcsr_kscratch1() gcsr_read(LOONGARCH_CSR_KS1)
> >> +#define write_gcsr_kscratch1(val) gcsr_write(val, LOONGARCH_CSR_KS1)
> >> +#define read_gcsr_kscratch2() gcsr_read(LOONGARCH_CSR_KS2)
> >> +#define write_gcsr_kscratch2(val) gcsr_write(val, LOONGARCH_CSR_KS2)
> >> +#define read_gcsr_kscratch3() gcsr_read(LOONGARCH_CSR_KS3)
> >> +#define write_gcsr_kscratch3(val) gcsr_write(val, LOONGARCH_CSR_KS3)
> >> +#define read_gcsr_kscratch4() gcsr_read(LOONGARCH_CSR_KS4)
> >> +#define write_gcsr_kscratch4(val) gcsr_write(val, LOONGARCH_CSR_KS4)
> >> +#define read_gcsr_kscratch5() gcsr_read(LOONGARCH_CSR_KS5)
> >> +#define write_gcsr_kscratch5(val) gcsr_write(val, LOONGARCH_CSR_KS5)
> >> +#define read_gcsr_kscratch6() gcsr_read(LOONGARCH_CSR_KS6)
> >> +#define write_gcsr_kscratch6(val) gcsr_write(val, LOONGARCH_CSR_KS6)
> >> +#define read_gcsr_kscratch7() gcsr_read(LOONGARCH_CSR_KS7)
> >> +#define write_gcsr_kscratch7(val) gcsr_write(val, LOONGARCH_CSR_KS7)
> >> +
> >> +#define read_gcsr_timerid() gcsr_read(LOONGARCH_CSR_TMID)
> >> +#define write_gcsr_timerid(val) gcsr_write(val, LOONGARCH_CSR_TMID)
> >> +#define read_gcsr_timercfg() gcsr_read(LOONGARCH_CSR_TCFG)
> >> +#define write_gcsr_timercfg(val) gcsr_write(val, LOONGARCH_CSR_TCFG)
> >> +#define read_gcsr_timertick() gcsr_read(LOONGARCH_CSR_TVAL)
> >> +#define write_gcsr_timertick(val) gcsr_write(val, LOONGARCH_CSR_TVAL)
> >> +#define read_gcsr_timeroffset() gcsr_read(LOONGARCH_CSR_CNTC)
> >> +#define write_gcsr_timeroffset(val) gcsr_write(val, LOONGARCH_CSR_CNTC)
> >> +
> >> +#define read_gcsr_llbctl() gcsr_read(LOONGARCH_CSR_LLBCTL)
> >> +#define write_gcsr_llbctl(val) gcsr_write(val, LOONGARCH_CSR_LLBCTL)
> >> +
> >> +#define read_gcsr_tlbrentry() gcsr_read(LOONGARCH_CSR_TLBRENTRY)
> >> +#define write_gcsr_tlbrentry(val) gcsr_write(val, LOONGARCH_CSR_TLBRENTRY)
> >> +#define read_gcsr_tlbrbadv() gcsr_read(LOONGARCH_CSR_TLBRBADV)
> >> +#define write_gcsr_tlbrbadv(val) gcsr_write(val, LOONGARCH_CSR_TLBRBADV)
> >> +#define read_gcsr_tlbrera() gcsr_read(LOONGARCH_CSR_TLBRERA)
> >> +#define write_gcsr_tlbrera(val) gcsr_write(val, LOONGARCH_CSR_TLBRERA)
> >> +#define read_gcsr_tlbrsave() gcsr_read(LOONGARCH_CSR_TLBRSAVE)
> >> +#define write_gcsr_tlbrsave(val) gcsr_write(val, LOONGARCH_CSR_TLBRSAVE)
> >> +#define read_gcsr_tlbrelo0() gcsr_read(LOONGARCH_CSR_TLBRELO0)
> >> +#define write_gcsr_tlbrelo0(val) gcsr_write(val, LOONGARCH_CSR_TLBRELO0)
> >> +#define read_gcsr_tlbrelo1() gcsr_read(LOONGARCH_CSR_TLBRELO1)
> >> +#define write_gcsr_tlbrelo1(val) gcsr_write(val, LOONGARCH_CSR_TLBRELO1)
> >> +#define read_gcsr_tlbrehi() gcsr_read(LOONGARCH_CSR_TLBREHI)
> >> +#define write_gcsr_tlbrehi(val) gcsr_write(val, LOONGARCH_CSR_TLBREHI)
> >> +#define read_gcsr_tlbrprmd() gcsr_read(LOONGARCH_CSR_TLBRPRMD)
> >> +#define write_gcsr_tlbrprmd(val) gcsr_write(val, LOONGARCH_CSR_TLBRPRMD)
> >> +
> >> +#define read_gcsr_directwin0() gcsr_read(LOONGARCH_CSR_DMWIN0)
> >> +#define write_gcsr_directwin0(val) gcsr_write(val, LOONGARCH_CSR_DMWIN0)
> >> +#define read_gcsr_directwin1() gcsr_read(LOONGARCH_CSR_DMWIN1)
> >> +#define write_gcsr_directwin1(val) gcsr_write(val, LOONGARCH_CSR_DMWIN1)
> >> +#define read_gcsr_directwin2() gcsr_read(LOONGARCH_CSR_DMWIN2)
> >> +#define write_gcsr_directwin2(val) gcsr_write(val, LOONGARCH_CSR_DMWIN2)
> >> +#define read_gcsr_directwin3() gcsr_read(LOONGARCH_CSR_DMWIN3)
> >> +#define write_gcsr_directwin3(val) gcsr_write(val, LOONGARCH_CSR_DMWIN3)
> >> +
> >> +/* Guest related CSRs */
> >> +#define read_csr_gtlbc() csr_read64(LOONGARCH_CSR_GTLBC)
> >> +#define write_csr_gtlbc(val) csr_write64(val, LOONGARCH_CSR_GTLBC)
> >> +#define read_csr_trgp() csr_read64(LOONGARCH_CSR_TRGP)
> >> +#define read_csr_gcfg() csr_read64(LOONGARCH_CSR_GCFG)
> >> +#define write_csr_gcfg(val) csr_write64(val, LOONGARCH_CSR_GCFG)
> >> +#define read_csr_gstat() csr_read64(LOONGARCH_CSR_GSTAT)
> >> +#define write_csr_gstat(val) csr_write64(val, LOONGARCH_CSR_GSTAT)
> >> +#define read_csr_gintc() csr_read64(LOONGARCH_CSR_GINTC)
> >> +#define write_csr_gintc(val) csr_write64(val, LOONGARCH_CSR_GINTC)
> >> +#define read_csr_gcntc() csr_read64(LOONGARCH_CSR_GCNTC)
> >> +#define write_csr_gcntc(val) csr_write64(val, LOONGARCH_CSR_GCNTC)
> >> +
> >> +#define __BUILD_GCSR_OP(name) __BUILD_CSR_COMMON(gcsr_##name)
> >> +
> >> +__BUILD_GCSR_OP(llbctl)
> >> +__BUILD_GCSR_OP(tlbidx)
> >> +__BUILD_CSR_OP(gcfg)
> >> +__BUILD_CSR_OP(gstat)
> >> +__BUILD_CSR_OP(gtlbc)
> >> +__BUILD_CSR_OP(gintc)
> >> +
> >> +#define set_gcsr_estat(val) \
> >> + gcsr_xchg(val, val, LOONGARCH_CSR_ESTAT)
> >> +#define clear_gcsr_estat(val) \
> >> + gcsr_xchg(~(val), val, LOONGARCH_CSR_ESTAT)
> >> +
> >> +#define kvm_read_hw_gcsr(id) gcsr_read(id)
> >> +#define kvm_write_hw_gcsr(csr, id, val) gcsr_write(val, id)
> >> +
> >> +int _kvm_getcsr(struct kvm_vcpu *vcpu, unsigned int id, u64 *v);
> >> +int _kvm_setcsr(struct kvm_vcpu *vcpu, unsigned int id, u64 v);
> >> +
> >> +int _kvm_emu_iocsr(larch_inst inst, struct kvm_run *run, struct kvm_vcpu *vcpu);
> >> +
> >> +#define kvm_save_hw_gcsr(csr, gid) (csr->csrs[gid] = gcsr_read(gid))
> >> +#define kvm_restore_hw_gcsr(csr, gid) (gcsr_write(csr->csrs[gid], gid))
> >> +
> >> +static __always_inline unsigned long kvm_read_sw_gcsr(struct loongarch_csrs *csr, int gid)
> >> +{
> >> + return csr->csrs[gid];
> >> +}
> >> +
> >> +static __always_inline void kvm_write_sw_gcsr(struct loongarch_csrs *csr,
> >> + int gid, unsigned long val)
> >> +{
> >> + csr->csrs[gid] = val;
> >> +}
> >> +
> >> +static __always_inline void kvm_set_sw_gcsr(struct loongarch_csrs *csr,
> >> + int gid, unsigned long val)
> >> +{
> >> + csr->csrs[gid] |= val;
> >> +}
> >> +
> >> +static __always_inline void kvm_change_sw_gcsr(struct loongarch_csrs *csr,
> >> + int gid, unsigned long mask,
> >> + unsigned long val)
> >> +{
> >> + unsigned long _mask = mask;
> >> +
> >> + csr->csrs[gid] &= ~_mask;
> >> + csr->csrs[gid] |= val & _mask;
> >> +}
> >> +#endif /* __ASM_LOONGARCH_KVM_CSR_H__ */
> >> diff --git a/arch/loongarch/include/asm/kvm_vcpu.h b/arch/loongarch/include/asm/kvm_vcpu.h
> >> new file mode 100644
> >> index 000000000000..74deaf55d22c
> >> --- /dev/null
> >> +++ b/arch/loongarch/include/asm/kvm_vcpu.h
> >> @@ -0,0 +1,97 @@
> >> +/* SPDX-License-Identifier: GPL-2.0 */
> >> +/*
> >> + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
> >> + */
> >> +
> >> +#ifndef __ASM_LOONGARCH_KVM_VCPU_H__
> >> +#define __ASM_LOONGARCH_KVM_VCPU_H__
> >> +
> >> +#include <linux/kvm_host.h>
> >> +#include <asm/loongarch.h>
> >> +
> >> +/* Controlled by 0x5 guest exst */
> >> +#define CPU_SIP0 (_ULCAST_(1))
> >> +#define CPU_SIP1 (_ULCAST_(1) << 1)
> >> +#define CPU_PMU (_ULCAST_(1) << 10)
> >> +#define CPU_TIMER (_ULCAST_(1) << 11)
> >> +#define CPU_IPI (_ULCAST_(1) << 12)
> >> +
> >> +/* Controlled by 0x52 guest exception VIP
> >> + * aligned to exst bit 5~12
> >> + */
> >> +#define CPU_IP0 (_ULCAST_(1))
> >> +#define CPU_IP1 (_ULCAST_(1) << 1)
> >> +#define CPU_IP2 (_ULCAST_(1) << 2)
> >> +#define CPU_IP3 (_ULCAST_(1) << 3)
> >> +#define CPU_IP4 (_ULCAST_(1) << 4)
> >> +#define CPU_IP5 (_ULCAST_(1) << 5)
> >> +#define CPU_IP6 (_ULCAST_(1) << 6)
> >> +#define CPU_IP7 (_ULCAST_(1) << 7)
> >> +
> >> +#define MNSEC_PER_SEC (NSEC_PER_SEC >> 20)
> >> +
> >> +/* KVM_IRQ_LINE irq field index values */
> >> +#define KVM_LOONGSON_IRQ_TYPE_SHIFT 24
> >> +#define KVM_LOONGSON_IRQ_TYPE_MASK 0xff
> >> +#define KVM_LOONGSON_IRQ_VCPU_SHIFT 16
> >> +#define KVM_LOONGSON_IRQ_VCPU_MASK 0xff
> >> +#define KVM_LOONGSON_IRQ_NUM_SHIFT 0
> >> +#define KVM_LOONGSON_IRQ_NUM_MASK 0xffff
> >> +
> >> +/* Irq_type field */
> >> +#define KVM_LOONGSON_IRQ_TYPE_CPU_IP 0
> >> +#define KVM_LOONGSON_IRQ_TYPE_CPU_IO 1
> >> +#define KVM_LOONGSON_IRQ_TYPE_HT 2
> >> +#define KVM_LOONGSON_IRQ_TYPE_MSI 3
> >> +#define KVM_LOONGSON_IRQ_TYPE_IOAPIC 4
> >> +#define KVM_LOONGSON_IRQ_TYPE_ROUTE 5
> >> +
> >> +/* Out-of-kernel GIC cpu interrupt injection irq_number field */
> >> +#define KVM_LOONGSON_IRQ_CPU_IRQ 0
> >> +#define KVM_LOONGSON_IRQ_CPU_FIQ 1
> >> +#define KVM_LOONGSON_CPU_IP_NUM 8
> >> +
> >> +typedef union loongarch_instruction larch_inst;
> >> +typedef int (*exit_handle_fn)(struct kvm_vcpu *);
> >> +
> >> +int _kvm_emu_mmio_write(struct kvm_vcpu *vcpu, larch_inst inst);
> >> +int _kvm_emu_mmio_read(struct kvm_vcpu *vcpu, larch_inst inst);
> >> +int _kvm_complete_mmio_read(struct kvm_vcpu *vcpu, struct kvm_run *run);
> >> +int _kvm_complete_iocsr_read(struct kvm_vcpu *vcpu, struct kvm_run *run);
> >> +int _kvm_emu_idle(struct kvm_vcpu *vcpu);
> >> +int _kvm_handle_pv_hcall(struct kvm_vcpu *vcpu);
> >> +int _kvm_pending_timer(struct kvm_vcpu *vcpu);
> >> +int _kvm_handle_fault(struct kvm_vcpu *vcpu, int fault);
> >> +void _kvm_deliver_intr(struct kvm_vcpu *vcpu);
> >> +
> >> +void kvm_own_fpu(struct kvm_vcpu *vcpu);
> >> +void kvm_lose_fpu(struct kvm_vcpu *vcpu);
> >> +void kvm_save_fpu(struct loongarch_fpu *fpu);
> >> +void kvm_restore_fpu(struct loongarch_fpu *fpu);
> >> +void kvm_restore_fcsr(struct loongarch_fpu *fpu);
> >> +
> >> +void kvm_acquire_timer(struct kvm_vcpu *vcpu);
> >> +void kvm_reset_timer(struct kvm_vcpu *vcpu);
> >> +enum hrtimer_restart kvm_count_timeout(struct kvm_vcpu *vcpu);
> >> +void kvm_init_timer(struct kvm_vcpu *vcpu, unsigned long hz);
> >> +void kvm_restore_timer(struct kvm_vcpu *vcpu);
> >> +void kvm_save_timer(struct kvm_vcpu *vcpu);
> >> +
> >> +int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
> >> + struct kvm_loongarch_interrupt *irq);
> >> +/*
> >> + * Loongarch KVM guest interrupt handling
> >> + */
> >> +static inline void _kvm_queue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
> >> +{
> >> + set_bit(irq, &vcpu->arch.irq_pending);
> >> + clear_bit(irq, &vcpu->arch.irq_clear);
> >> +}
> >> +
> >> +static inline void _kvm_dequeue_irq(struct kvm_vcpu *vcpu, unsigned int irq)
> >> +{
> >> + clear_bit(irq, &vcpu->arch.irq_pending);
> >> + set_bit(irq, &vcpu->arch.irq_clear);
> >> +}
> >> +
> >> +#endif /* __ASM_LOONGARCH_KVM_VCPU_H__ */
> >> diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h
> >> index 35e8a52fea11..cb1c66c5a92f 100644
> >> --- a/arch/loongarch/include/asm/loongarch.h
> >> +++ b/arch/loongarch/include/asm/loongarch.h
> >> @@ -11,6 +11,7 @@
> >>
> >> #ifndef __ASSEMBLY__
> >> #include <larchintrin.h>
> >> +#include <asm/insn-def.h>
> >>
> >> /*
> >> * parse_r var, r - Helper assembler macro for parsing register names.
> >> @@ -309,6 +310,7 @@ static __always_inline void iocsr_write64(u64 val, u32 reg)
> >> #define LOONGARCH_CSR_ECFG 0x4 /* Exception config */
> >> #define CSR_ECFG_VS_SHIFT 16
> >> #define CSR_ECFG_VS_WIDTH 3
> >> +#define CSR_ECFG_VS_SHIFT_END (CSR_ECFG_VS_SHIFT + CSR_ECFG_VS_WIDTH - 1)
> >> #define CSR_ECFG_VS (_ULCAST_(0x7) << CSR_ECFG_VS_SHIFT)
> >> #define CSR_ECFG_IM_SHIFT 0
> >> #define CSR_ECFG_IM_WIDTH 14
> >> @@ -397,13 +399,14 @@ static __always_inline void iocsr_write64(u64 val, u32 reg)
> >> #define CSR_TLBLO1_V (_ULCAST_(0x1) << CSR_TLBLO1_V_SHIFT)
> >>
> >> #define LOONGARCH_CSR_GTLBC 0x15 /* Guest TLB control */
> >> -#define CSR_GTLBC_RID_SHIFT 16
> >> -#define CSR_GTLBC_RID_WIDTH 8
> >> -#define CSR_GTLBC_RID (_ULCAST_(0xff) << CSR_GTLBC_RID_SHIFT)
> >> +#define CSR_GTLBC_TGID_SHIFT 16
> >> +#define CSR_GTLBC_TGID_WIDTH 8
> >> +#define CSR_GTLBC_TGID_SHIFT_END (CSR_GTLBC_TGID_SHIFT + CSR_GTLBC_TGID_WIDTH - 1)
> >> +#define CSR_GTLBC_TGID (_ULCAST_(0xff) << CSR_GTLBC_TGID_SHIFT)
> >> #define CSR_GTLBC_TOTI_SHIFT 13
> >> #define CSR_GTLBC_TOTI (_ULCAST_(0x1) << CSR_GTLBC_TOTI_SHIFT)
> >> -#define CSR_GTLBC_USERID_SHIFT 12
> >> -#define CSR_GTLBC_USERID (_ULCAST_(0x1) << CSR_GTLBC_USERID_SHIFT)
> >> +#define CSR_GTLBC_USETGID_SHIFT 12
> >> +#define CSR_GTLBC_USETGID (_ULCAST_(0x1) << CSR_GTLBC_USETGID_SHIFT)
> >> #define CSR_GTLBC_GMTLBSZ_SHIFT 0
> >> #define CSR_GTLBC_GMTLBSZ_WIDTH 6
> >> #define CSR_GTLBC_GMTLBSZ (_ULCAST_(0x3f) << CSR_GTLBC_GMTLBSZ_SHIFT)
> >> @@ -555,6 +558,7 @@ static __always_inline void iocsr_write64(u64 val, u32 reg)
> >> #define LOONGARCH_CSR_GSTAT 0x50 /* Guest status */
> >> #define CSR_GSTAT_GID_SHIFT 16
> >> #define CSR_GSTAT_GID_WIDTH 8
> >> +#define CSR_GSTAT_GID_SHIFT_END (CSR_GSTAT_GID_SHIFT + CSR_GSTAT_GID_WIDTH - 1)
> >> #define CSR_GSTAT_GID (_ULCAST_(0xff) << CSR_GSTAT_GID_SHIFT)
> >> #define CSR_GSTAT_GIDBIT_SHIFT 4
> >> #define CSR_GSTAT_GIDBIT_WIDTH 6
> >> @@ -605,6 +609,12 @@ static __always_inline void iocsr_write64(u64 val, u32 reg)
> >> #define CSR_GCFG_MATC_GUEST (_ULCAST_(0x0) << CSR_GCFG_MATC_SHITF)
> >> #define CSR_GCFG_MATC_ROOT (_ULCAST_(0x1) << CSR_GCFG_MATC_SHITF)
> >> #define CSR_GCFG_MATC_NEST (_ULCAST_(0x2) << CSR_GCFG_MATC_SHITF)
> >> +#define CSR_GCFG_MATP_NEST_SHIFT 2
> >> +#define CSR_GCFG_MATP_NEST (_ULCAST_(0x1) << CSR_GCFG_MATP_NEST_SHIFT)
> >> +#define CSR_GCFG_MATP_ROOT_SHIFT 1
> >> +#define CSR_GCFG_MATP_ROOT (_ULCAST_(0x1) << CSR_GCFG_MATP_ROOT_SHIFT)
> >> +#define CSR_GCFG_MATP_GUEST_SHIFT 0
> >> +#define CSR_GCFG_MATP_GUEST (_ULCAST_(0x1) << CSR_GCFG_MATP_GUEST_SHIFT)
> >>
> >> #define LOONGARCH_CSR_GINTC 0x52 /* Guest interrupt control */
> >> #define CSR_GINTC_HC_SHIFT 16
> >> diff --git a/arch/loongarch/kvm/trace.h b/arch/loongarch/kvm/trace.h
> >> new file mode 100644
> >> index 000000000000..17b28d94d569
> >> --- /dev/null
> >> +++ b/arch/loongarch/kvm/trace.h
> >> @@ -0,0 +1,168 @@
> >> +/* SPDX-License-Identifier: GPL-2.0 */
> >> +/*
> >> + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
> >> + */
> >> +
> >> +#if !defined(_TRACE_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
> >> +#define _TRACE_KVM_H
> >> +
> >> +#include <linux/tracepoint.h>
> >> +#include <asm/kvm_csr.h>
> >> +
> >> +#undef TRACE_SYSTEM
> >> +#define TRACE_SYSTEM kvm
> >> +
> >> +/*
> >> + * Tracepoints for VM enters
> >> + */
> >> +DECLARE_EVENT_CLASS(kvm_transition,
> >> + TP_PROTO(struct kvm_vcpu *vcpu),
> >> + TP_ARGS(vcpu),
> >> + TP_STRUCT__entry(
> >> + __field(unsigned long, pc)
> >> + ),
> >> +
> >> + TP_fast_assign(
> >> + __entry->pc = vcpu->arch.pc;
> >> + ),
> >> +
> >> + TP_printk("PC: 0x%08lx",
> >> + __entry->pc)
> >> +);
> >> +
> >> +DEFINE_EVENT(kvm_transition, kvm_enter,
> >> + TP_PROTO(struct kvm_vcpu *vcpu),
> >> + TP_ARGS(vcpu));
> >> +
> >> +DEFINE_EVENT(kvm_transition, kvm_reenter,
> >> + TP_PROTO(struct kvm_vcpu *vcpu),
> >> + TP_ARGS(vcpu));
> >> +
> >> +DEFINE_EVENT(kvm_transition, kvm_out,
> >> + TP_PROTO(struct kvm_vcpu *vcpu),
> >> + TP_ARGS(vcpu));
> >> +
> >> +/* Further exit reasons */
> >> +#define KVM_TRACE_EXIT_IDLE 64
> >> +#define KVM_TRACE_EXIT_CACHE 65
> >> +#define KVM_TRACE_EXIT_SIGNAL 66
> >> +
> >> +/* Tracepoints for VM exits */
> >> +#define kvm_trace_symbol_exit_types \
> >> + { KVM_TRACE_EXIT_IDLE, "IDLE" }, \
> >> + { KVM_TRACE_EXIT_CACHE, "CACHE" }, \
> >> + { KVM_TRACE_EXIT_SIGNAL, "Signal" }
> >> +
> >> +TRACE_EVENT(kvm_exit_gspr,
> >> + TP_PROTO(struct kvm_vcpu *vcpu, unsigned int inst_word),
> >> + TP_ARGS(vcpu, inst_word),
> >> + TP_STRUCT__entry(
> >> + __field(unsigned int, inst_word)
> >> + ),
> >> +
> >> + TP_fast_assign(
> >> + __entry->inst_word = inst_word;
> >> + ),
> >> +
> >> + TP_printk("inst word: 0x%08x",
> >> + __entry->inst_word)
> >> +);
> >> +
> >> +
> >> +DECLARE_EVENT_CLASS(kvm_exit,
> >> + TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),
> >> + TP_ARGS(vcpu, reason),
> >> + TP_STRUCT__entry(
> >> + __field(unsigned long, pc)
> >> + __field(unsigned int, reason)
> >> + ),
> >> +
> >> + TP_fast_assign(
> >> + __entry->pc = vcpu->arch.pc;
> >> + __entry->reason = reason;
> >> + ),
> >> +
> >> + TP_printk("[%s]PC: 0x%08lx",
> >> + __print_symbolic(__entry->reason,
> >> + kvm_trace_symbol_exit_types),
> >> + __entry->pc)
> >> +);
> >> +
> >> +DEFINE_EVENT(kvm_exit, kvm_exit_idle,
> >> + TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),
> >> + TP_ARGS(vcpu, reason));
> >> +
> >> +DEFINE_EVENT(kvm_exit, kvm_exit_cache,
> >> + TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),
> >> + TP_ARGS(vcpu, reason));
> >> +
> >> +DEFINE_EVENT(kvm_exit, kvm_exit,
> >> + TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),
> >> + TP_ARGS(vcpu, reason));
> >> +
> >> +#define KVM_TRACE_AUX_RESTORE 0
> >> +#define KVM_TRACE_AUX_SAVE 1
> >> +#define KVM_TRACE_AUX_ENABLE 2
> >> +#define KVM_TRACE_AUX_DISABLE 3
> >> +#define KVM_TRACE_AUX_DISCARD 4
> >> +
> >> +#define KVM_TRACE_AUX_FPU 1
> >> +
> >> +#define kvm_trace_symbol_aux_op \
> >> + { KVM_TRACE_AUX_RESTORE, "restore" }, \
> >> + { KVM_TRACE_AUX_SAVE, "save" }, \
> >> + { KVM_TRACE_AUX_ENABLE, "enable" }, \
> >> + { KVM_TRACE_AUX_DISABLE, "disable" }, \
> >> + { KVM_TRACE_AUX_DISCARD, "discard" }
> >> +
> >> +#define kvm_trace_symbol_aux_state \
> >> + { KVM_TRACE_AUX_FPU, "FPU" }
> >> +
> >> +TRACE_EVENT(kvm_aux,
> >> + TP_PROTO(struct kvm_vcpu *vcpu, unsigned int op,
> >> + unsigned int state),
> >> + TP_ARGS(vcpu, op, state),
> >> + TP_STRUCT__entry(
> >> + __field(unsigned long, pc)
> >> + __field(u8, op)
> >> + __field(u8, state)
> >> + ),
> >> +
> >> + TP_fast_assign(
> >> + __entry->pc = vcpu->arch.pc;
> >> + __entry->op = op;
> >> + __entry->state = state;
> >> + ),
> >> +
> >> + TP_printk("%s %s PC: 0x%08lx",
> >> + __print_symbolic(__entry->op,
> >> + kvm_trace_symbol_aux_op),
> >> + __print_symbolic(__entry->state,
> >> + kvm_trace_symbol_aux_state),
> >> + __entry->pc)
> >> +);
> >> +
> >> +TRACE_EVENT(kvm_vpid_change,
> >> + TP_PROTO(struct kvm_vcpu *vcpu, unsigned long vpid),
> >> + TP_ARGS(vcpu, vpid),
> >> + TP_STRUCT__entry(
> >> + __field(unsigned long, vpid)
> >> + ),
> >> +
> >> + TP_fast_assign(
> >> + __entry->vpid = vpid;
> >> + ),
> >> +
> >> + TP_printk("vpid: 0x%08lx",
> >> + __entry->vpid)
> >> +);
> >> +
> >> +#endif /* _TRACE_LOONGARCH64_KVM_H */
> >> +
> >> +#undef TRACE_INCLUDE_PATH
> >> +#define TRACE_INCLUDE_PATH ../../arch/loongarch/kvm
> >> +#undef TRACE_INCLUDE_FILE
> >> +#define TRACE_INCLUDE_FILE trace
> >> +
> >> +/* This part must be outside protection */
> >> +#include <trace/define_trace.h>
> >> --
> >> 2.39.1
> >>
> >>
>
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