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2024-02-20 e636c8d336489bf3eed5878299e6cc045bbad077 
 kernel/arch/powerpc/kvm/book3s_interrupts.S
....@@ -1,16 +1,5 @@
1
+/* SPDX-License-Identifier: GPL-2.0-only */
12 /*
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License, version 2, as
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- * published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
143  *
154  * Copyright SUSE Linux Products GmbH 2009
165  *
....@@ -37,7 +26,7 @@
3726 #define FUNC(name)		name
3827 #define GET_SHADOW_VCPU(reg)	lwz     reg, (THREAD + THREAD_KVM_SVCPU)(r2)
3928 
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-#endif /* CONFIG_PPC_BOOK3S_XX */
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+#endif /* CONFIG_PPC_BOOK3S_64 */
4130 
4231 #define VCPU_LOAD_NVGPRS(vcpu) \
4332 	PPC_LL	r14, VCPU_GPR(R14)(vcpu); \
....@@ -66,8 +55,7 @@
6655  ****************************************************************************/
6756 
6857 /* Registers:
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- *  r3: kvm_run pointer
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- *  r4: vcpu pointer
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+ *  r3: vcpu pointer
7159  */
7260 _GLOBAL(__kvmppc_vcpu_run)
7361 
....@@ -79,8 +67,8 @@
7967 	/* Save host state to the stack */
8068 	PPC_STLU r1, -SWITCH_FRAME_SIZE(r1)
8169 
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-	/* Save r3 (kvm_run) and r4 (vcpu) */
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-	SAVE_2GPRS(3, r1)
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+	/* Save r3 (vcpu) */
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+	SAVE_GPR(3, r1)
8472 
8573 	/* Save non-volatile registers (r14 - r31) */
8674 	SAVE_NVGPRS(r1)
....@@ -93,47 +81,46 @@
9381 	PPC_STL	r0, _LINK(r1)
9482 
9583 	/* Load non-volatile guest state from the vcpu */
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-	VCPU_LOAD_NVGPRS(r4)
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+	VCPU_LOAD_NVGPRS(r3)
9785 
9886 kvm_start_lightweight:
9987 	/* Copy registers into shadow vcpu so we can access them in real mode */
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-	mr	r3, r4
10188 	bl	FUNC(kvmppc_copy_to_svcpu)
10289 	nop
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-	REST_GPR(4, r1)
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+	REST_GPR(3, r1)
10491 
10592 #ifdef CONFIG_PPC_BOOK3S_64
10693 	/* Get the dcbz32 flag */
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-	PPC_LL	r3, VCPU_HFLAGS(r4)
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-	rldicl	r3, r3, 0, 63		/* r3 &= 1 */
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-	stb	r3, HSTATE_RESTORE_HID5(r13)
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+	PPC_LL	r0, VCPU_HFLAGS(r3)
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+	rldicl	r0, r0, 0, 63		/* r3 &= 1 */
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+	stb	r0, HSTATE_RESTORE_HID5(r13)
11097 
11198 	/* Load up guest SPRG3 value, since it's user readable */
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-	lwz	r3, VCPU_SHAREDBE(r4)
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-	cmpwi	r3, 0
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-	ld	r5, VCPU_SHARED(r4)
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+	lbz	r4, VCPU_SHAREDBE(r3)
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+	cmpwi	r4, 0
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+	ld	r5, VCPU_SHARED(r3)
115102 	beq	sprg3_little_endian
116103 sprg3_big_endian:
117104 #ifdef __BIG_ENDIAN__
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-	ld	r3, VCPU_SHARED_SPRG3(r5)
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+	ld	r4, VCPU_SHARED_SPRG3(r5)
119106 #else
120107 	addi	r5, r5, VCPU_SHARED_SPRG3
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-	ldbrx	r3, 0, r5
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+	ldbrx	r4, 0, r5
122109 #endif
123110 	b	after_sprg3_load
124111 sprg3_little_endian:
125112 #ifdef __LITTLE_ENDIAN__
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-	ld	r3, VCPU_SHARED_SPRG3(r5)
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+	ld	r4, VCPU_SHARED_SPRG3(r5)
127114 #else
128115 	addi	r5, r5, VCPU_SHARED_SPRG3
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-	ldbrx	r3, 0, r5
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+	ldbrx	r4, 0, r5
130117 #endif
131118 
132119 after_sprg3_load:
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-	mtspr	SPRN_SPRG3, r3
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+	mtspr	SPRN_SPRG3, r4
134121 #endif /* CONFIG_PPC_BOOK3S_64 */
135122 
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-	PPC_LL	r4, VCPU_SHADOW_MSR(r4)	/* get shadow_msr */
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+	PPC_LL	r4, VCPU_SHADOW_MSR(r3)	/* get shadow_msr */
137124 
138125 	/* Jump to segment patching handler and into our guest */
139126 	bl	FUNC(kvmppc_entry_trampoline)
....@@ -157,7 +144,7 @@
157144 	 *
158145 	 */
159146 
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-	PPC_LL	r3, GPR4(r1)		/* vcpu pointer */
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+	PPC_LL	r3, GPR3(r1)		/* vcpu pointer */
161148 
162149 	/*
163150 	 * kvmppc_copy_from_svcpu can clobber volatile registers, save
....@@ -180,7 +167,7 @@
180167 #endif /* CONFIG_PPC_BOOK3S_64 */
181168 
182169 	/* R7 = vcpu */
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-	PPC_LL	r7, GPR4(r1)
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+	PPC_LL	r7, GPR3(r1)
184171 
185172 	PPC_STL	r14, VCPU_GPR(R14)(r7)
186173 	PPC_STL	r15, VCPU_GPR(R15)(r7)
....@@ -201,11 +188,11 @@
201188 	PPC_STL	r30, VCPU_GPR(R30)(r7)
202189 	PPC_STL	r31, VCPU_GPR(R31)(r7)
203190 
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-	/* Pass the exit number as 3rd argument to kvmppc_handle_exit */
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-	lwz	r5, VCPU_TRAP(r7)
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+	/* Pass the exit number as 2nd argument to kvmppc_handle_exit */
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+	lwz	r4, VCPU_TRAP(r7)
206193 
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-	/* Restore r3 (kvm_run) and r4 (vcpu) */
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-	REST_2GPRS(3, r1)
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+	/* Restore r3 (vcpu) */
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+	REST_GPR(3, r1)
209196 	bl	FUNC(kvmppc_handle_exit_pr)
210197 
211198 	/* If RESUME_GUEST, get back in the loop */
....@@ -234,11 +221,11 @@
234221 	PPC_LL	r4, _LINK(r1)
235222 	PPC_STL r4, (PPC_LR_STKOFF + SWITCH_FRAME_SIZE)(r1)
236223 
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-	/* Load vcpu and cpu_run */
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-	REST_2GPRS(3, r1)
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+	/* Load vcpu */
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+	REST_GPR(3, r1)
239226 
240227 	/* Load non-volatile guest state from the vcpu */
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-	VCPU_LOAD_NVGPRS(r4)
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+	VCPU_LOAD_NVGPRS(r3)
242229 
243230 	/* Jump back into the beginning of this function */
244231 	b	kvm_start_lightweight
....@@ -246,7 +233,7 @@
246233 kvm_loop_lightweight:
247234 
248235 	/* We'll need the vcpu pointer */
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-	REST_GPR(4, r1)
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+	REST_GPR(3, r1)
250237 
251238 	/* Jump back into the beginning of this function */
252239 	b	kvm_start_lightweight