FILE
kvm_csr.h

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linux-6.19.14/arch/loongarch/include/asm/kvm_csr.h C
  1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
  4 */
  5
  6#ifndef __ASM_LOONGARCH_KVM_CSR_H__
  7#define __ASM_LOONGARCH_KVM_CSR_H__
  8
  9#include <linux/uaccess.h>
 10#include <linux/kvm_host.h>
 11#include <asm/loongarch.h>
 12#include <asm/kvm_vcpu.h>
 13
 14#define gcsr_read(csr)						\
 15({								\
 16	register unsigned long __v;				\
 17	__asm__ __volatile__(					\
 18		" gcsrrd %[val], %[reg]\n\t"			\
 19		: [val] "=r" (__v)				\
 20		: [reg] "i" (csr)				\
 21		: "memory");					\
 22	__v;							\
 23})
 24
 25#define gcsr_write(v, csr)					\
 26({								\
 27	register unsigned long __v = v;				\
 28	__asm__ __volatile__ (					\
 29		" gcsrwr %[val], %[reg]\n\t"			\
 30		: [val] "+r" (__v)				\
 31		: [reg] "i" (csr)				\
 32		: "memory");					\
 33	__v;							\
 34})
 35
 36#define gcsr_xchg(v, m, csr)					\
 37({								\
 38	register unsigned long __v = v;				\
 39	__asm__ __volatile__(					\
 40		" gcsrxchg %[val], %[mask], %[reg]\n\t"		\
 41		: [val] "+r" (__v)				\
 42		: [mask] "r" (m), [reg] "i" (csr)		\
 43		: "memory");					\
 44	__v;							\
 45})
 46
 47/* Guest CSRS read and write */
 48#define read_gcsr_crmd()		gcsr_read(LOONGARCH_CSR_CRMD)
 49#define write_gcsr_crmd(val)		gcsr_write(val, LOONGARCH_CSR_CRMD)
 50#define read_gcsr_prmd()		gcsr_read(LOONGARCH_CSR_PRMD)
 51#define write_gcsr_prmd(val)		gcsr_write(val, LOONGARCH_CSR_PRMD)
 52#define read_gcsr_euen()		gcsr_read(LOONGARCH_CSR_EUEN)
 53#define write_gcsr_euen(val)		gcsr_write(val, LOONGARCH_CSR_EUEN)
 54#define read_gcsr_misc()		gcsr_read(LOONGARCH_CSR_MISC)
 55#define write_gcsr_misc(val)		gcsr_write(val, LOONGARCH_CSR_MISC)
 56#define read_gcsr_ecfg()		gcsr_read(LOONGARCH_CSR_ECFG)
 57#define write_gcsr_ecfg(val)		gcsr_write(val, LOONGARCH_CSR_ECFG)
 58#define read_gcsr_estat()		gcsr_read(LOONGARCH_CSR_ESTAT)
 59#define write_gcsr_estat(val)		gcsr_write(val, LOONGARCH_CSR_ESTAT)
 60#define read_gcsr_era()			gcsr_read(LOONGARCH_CSR_ERA)
 61#define write_gcsr_era(val)		gcsr_write(val, LOONGARCH_CSR_ERA)
 62#define read_gcsr_badv()		gcsr_read(LOONGARCH_CSR_BADV)
 63#define write_gcsr_badv(val)		gcsr_write(val, LOONGARCH_CSR_BADV)
 64#define read_gcsr_badi()		gcsr_read(LOONGARCH_CSR_BADI)
 65#define write_gcsr_badi(val)		gcsr_write(val, LOONGARCH_CSR_BADI)
 66#define read_gcsr_eentry()		gcsr_read(LOONGARCH_CSR_EENTRY)
 67#define write_gcsr_eentry(val)		gcsr_write(val, LOONGARCH_CSR_EENTRY)
 68
 69#define read_gcsr_asid()		gcsr_read(LOONGARCH_CSR_ASID)
 70#define write_gcsr_asid(val)		gcsr_write(val, LOONGARCH_CSR_ASID)
 71#define read_gcsr_pgdl()		gcsr_read(LOONGARCH_CSR_PGDL)
 72#define write_gcsr_pgdl(val)		gcsr_write(val, LOONGARCH_CSR_PGDL)
 73#define read_gcsr_pgdh()		gcsr_read(LOONGARCH_CSR_PGDH)
 74#define write_gcsr_pgdh(val)		gcsr_write(val, LOONGARCH_CSR_PGDH)
 75#define write_gcsr_pgd(val)		gcsr_write(val, LOONGARCH_CSR_PGD)
 76#define read_gcsr_pgd()			gcsr_read(LOONGARCH_CSR_PGD)
 77#define read_gcsr_pwctl0()		gcsr_read(LOONGARCH_CSR_PWCTL0)
 78#define write_gcsr_pwctl0(val)		gcsr_write(val, LOONGARCH_CSR_PWCTL0)
 79#define read_gcsr_pwctl1()		gcsr_read(LOONGARCH_CSR_PWCTL1)
 80#define write_gcsr_pwctl1(val)		gcsr_write(val, LOONGARCH_CSR_PWCTL1)
 81#define read_gcsr_stlbpgsize()		gcsr_read(LOONGARCH_CSR_STLBPGSIZE)
 82#define write_gcsr_stlbpgsize(val)	gcsr_write(val, LOONGARCH_CSR_STLBPGSIZE)
 83#define read_gcsr_rvacfg()		gcsr_read(LOONGARCH_CSR_RVACFG)
 84#define write_gcsr_rvacfg(val)		gcsr_write(val, LOONGARCH_CSR_RVACFG)
 85
 86#define read_gcsr_cpuid()		gcsr_read(LOONGARCH_CSR_CPUID)
 87#define write_gcsr_cpuid(val)		gcsr_write(val, LOONGARCH_CSR_CPUID)
 88#define read_gcsr_prcfg1()		gcsr_read(LOONGARCH_CSR_PRCFG1)
 89#define write_gcsr_prcfg1(val)		gcsr_write(val, LOONGARCH_CSR_PRCFG1)
 90#define read_gcsr_prcfg2()		gcsr_read(LOONGARCH_CSR_PRCFG2)
 91#define write_gcsr_prcfg2(val)		gcsr_write(val, LOONGARCH_CSR_PRCFG2)
 92#define read_gcsr_prcfg3()		gcsr_read(LOONGARCH_CSR_PRCFG3)
 93#define write_gcsr_prcfg3(val)		gcsr_write(val, LOONGARCH_CSR_PRCFG3)
 94
 95#define read_gcsr_kscratch0()		gcsr_read(LOONGARCH_CSR_KS0)
 96#define write_gcsr_kscratch0(val)	gcsr_write(val, LOONGARCH_CSR_KS0)
 97#define read_gcsr_kscratch1()		gcsr_read(LOONGARCH_CSR_KS1)
 98#define write_gcsr_kscratch1(val)	gcsr_write(val, LOONGARCH_CSR_KS1)
 99#define read_gcsr_kscratch2()		gcsr_read(LOONGARCH_CSR_KS2)
100#define write_gcsr_kscratch2(val)	gcsr_write(val, LOONGARCH_CSR_KS2)
101#define read_gcsr_kscratch3()		gcsr_read(LOONGARCH_CSR_KS3)
102#define write_gcsr_kscratch3(val)	gcsr_write(val, LOONGARCH_CSR_KS3)
103#define read_gcsr_kscratch4()		gcsr_read(LOONGARCH_CSR_KS4)
104#define write_gcsr_kscratch4(val)	gcsr_write(val, LOONGARCH_CSR_KS4)
105#define read_gcsr_kscratch5()		gcsr_read(LOONGARCH_CSR_KS5)
106#define write_gcsr_kscratch5(val)	gcsr_write(val, LOONGARCH_CSR_KS5)
107#define read_gcsr_kscratch6()		gcsr_read(LOONGARCH_CSR_KS6)
108#define write_gcsr_kscratch6(val)	gcsr_write(val, LOONGARCH_CSR_KS6)
109#define read_gcsr_kscratch7()		gcsr_read(LOONGARCH_CSR_KS7)
110#define write_gcsr_kscratch7(val)	gcsr_write(val, LOONGARCH_CSR_KS7)
111
112#define read_gcsr_timerid()		gcsr_read(LOONGARCH_CSR_TMID)
113#define write_gcsr_timerid(val)		gcsr_write(val, LOONGARCH_CSR_TMID)
114#define read_gcsr_timercfg()		gcsr_read(LOONGARCH_CSR_TCFG)
115#define write_gcsr_timercfg(val)	gcsr_write(val, LOONGARCH_CSR_TCFG)
116#define read_gcsr_timertick()		gcsr_read(LOONGARCH_CSR_TVAL)
117#define write_gcsr_timertick(val)	gcsr_write(val, LOONGARCH_CSR_TVAL)
118#define read_gcsr_timeroffset()		gcsr_read(LOONGARCH_CSR_CNTC)
119#define write_gcsr_timeroffset(val)	gcsr_write(val, LOONGARCH_CSR_CNTC)
120
121#define read_gcsr_llbctl()		gcsr_read(LOONGARCH_CSR_LLBCTL)
122#define write_gcsr_llbctl(val)		gcsr_write(val, LOONGARCH_CSR_LLBCTL)
123
124#define read_gcsr_tlbidx()		gcsr_read(LOONGARCH_CSR_TLBIDX)
125#define write_gcsr_tlbidx(val)		gcsr_write(val, LOONGARCH_CSR_TLBIDX)
126#define read_gcsr_tlbrentry()		gcsr_read(LOONGARCH_CSR_TLBRENTRY)
127#define write_gcsr_tlbrentry(val)	gcsr_write(val, LOONGARCH_CSR_TLBRENTRY)
128#define read_gcsr_tlbrbadv()		gcsr_read(LOONGARCH_CSR_TLBRBADV)
129#define write_gcsr_tlbrbadv(val)	gcsr_write(val, LOONGARCH_CSR_TLBRBADV)
130#define read_gcsr_tlbrera()		gcsr_read(LOONGARCH_CSR_TLBRERA)
131#define write_gcsr_tlbrera(val)		gcsr_write(val, LOONGARCH_CSR_TLBRERA)
132#define read_gcsr_tlbrsave()		gcsr_read(LOONGARCH_CSR_TLBRSAVE)
133#define write_gcsr_tlbrsave(val)	gcsr_write(val, LOONGARCH_CSR_TLBRSAVE)
134#define read_gcsr_tlbrelo0()		gcsr_read(LOONGARCH_CSR_TLBRELO0)
135#define write_gcsr_tlbrelo0(val)	gcsr_write(val, LOONGARCH_CSR_TLBRELO0)
136#define read_gcsr_tlbrelo1()		gcsr_read(LOONGARCH_CSR_TLBRELO1)
137#define write_gcsr_tlbrelo1(val)	gcsr_write(val, LOONGARCH_CSR_TLBRELO1)
138#define read_gcsr_tlbrehi()		gcsr_read(LOONGARCH_CSR_TLBREHI)
139#define write_gcsr_tlbrehi(val)		gcsr_write(val, LOONGARCH_CSR_TLBREHI)
140#define read_gcsr_tlbrprmd()		gcsr_read(LOONGARCH_CSR_TLBRPRMD)
141#define write_gcsr_tlbrprmd(val)	gcsr_write(val, LOONGARCH_CSR_TLBRPRMD)
142
143#define read_gcsr_directwin0()		gcsr_read(LOONGARCH_CSR_DMWIN0)
144#define write_gcsr_directwin0(val)	gcsr_write(val, LOONGARCH_CSR_DMWIN0)
145#define read_gcsr_directwin1()		gcsr_read(LOONGARCH_CSR_DMWIN1)
146#define write_gcsr_directwin1(val)	gcsr_write(val, LOONGARCH_CSR_DMWIN1)
147#define read_gcsr_directwin2()		gcsr_read(LOONGARCH_CSR_DMWIN2)
148#define write_gcsr_directwin2(val)	gcsr_write(val, LOONGARCH_CSR_DMWIN2)
149#define read_gcsr_directwin3()		gcsr_read(LOONGARCH_CSR_DMWIN3)
150#define write_gcsr_directwin3(val)	gcsr_write(val, LOONGARCH_CSR_DMWIN3)
151
152/* Guest related CSRs */
153#define read_csr_gtlbc()		csr_read64(LOONGARCH_CSR_GTLBC)
154#define write_csr_gtlbc(val)		csr_write64(val, LOONGARCH_CSR_GTLBC)
155#define read_csr_trgp()			csr_read64(LOONGARCH_CSR_TRGP)
156#define read_csr_gcfg()			csr_read64(LOONGARCH_CSR_GCFG)
157#define write_csr_gcfg(val)		csr_write64(val, LOONGARCH_CSR_GCFG)
158#define read_csr_gstat()		csr_read64(LOONGARCH_CSR_GSTAT)
159#define write_csr_gstat(val)		csr_write64(val, LOONGARCH_CSR_GSTAT)
160#define read_csr_gintc()		csr_read64(LOONGARCH_CSR_GINTC)
161#define write_csr_gintc(val)		csr_write64(val, LOONGARCH_CSR_GINTC)
162#define read_csr_gcntc()		csr_read64(LOONGARCH_CSR_GCNTC)
163#define write_csr_gcntc(val)		csr_write64(val, LOONGARCH_CSR_GCNTC)
164
165#define __BUILD_GCSR_OP(name)		__BUILD_CSR_COMMON(gcsr_##name)
166
167__BUILD_CSR_OP(gcfg)
168__BUILD_CSR_OP(gstat)
169__BUILD_CSR_OP(gtlbc)
170__BUILD_CSR_OP(gintc)
171__BUILD_GCSR_OP(llbctl)
172__BUILD_GCSR_OP(tlbidx)
173
174#define set_gcsr_estat(val)	\
175	gcsr_xchg(val, val, LOONGARCH_CSR_ESTAT)
176#define clear_gcsr_estat(val)	\
177	gcsr_xchg(~(val), val, LOONGARCH_CSR_ESTAT)
178
179#define kvm_read_hw_gcsr(id)		gcsr_read(id)
180#define kvm_write_hw_gcsr(id, val)	gcsr_write(val, id)
181
182#define kvm_save_hw_gcsr(csr, gid)	(csr->csrs[gid] = gcsr_read(gid))
183#define kvm_restore_hw_gcsr(csr, gid)	(gcsr_write(csr->csrs[gid], gid))
184
185#define kvm_read_clear_hw_gcsr(csr, gid)	(csr->csrs[gid] = gcsr_write(0, gid))
186
187int kvm_emu_iocsr(larch_inst inst, struct kvm_run *run, struct kvm_vcpu *vcpu);
188
189static __always_inline unsigned long kvm_read_sw_gcsr(struct loongarch_csrs *csr, int gid)
190{
191	return csr->csrs[gid];
192}
193
194static __always_inline void kvm_write_sw_gcsr(struct loongarch_csrs *csr, int gid, unsigned long val)
195{
196	csr->csrs[gid] = val;
197}
198
199static __always_inline void kvm_set_sw_gcsr(struct loongarch_csrs *csr,
200					    int gid, unsigned long val)
201{
202	csr->csrs[gid] |= val;
203}
204
205static __always_inline void kvm_change_sw_gcsr(struct loongarch_csrs *csr,
206					       int gid, unsigned long mask, unsigned long val)
207{
208	unsigned long _mask = mask;
209
210	csr->csrs[gid] &= ~_mask;
211	csr->csrs[gid] |= val & _mask;
212}
213
214#define KVM_PMU_EVENT_ENABLED	(CSR_PERFCTRL_PLV0 | CSR_PERFCTRL_PLV1 | \
215					CSR_PERFCTRL_PLV2 | CSR_PERFCTRL_PLV3)
216
217#endif	/* __ASM_LOONGARCH_KVM_CSR_H__ */
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