add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/arch/x86/xen/enlighten_hvm.c
..
..
@@ -1,3 +1,5 @@
1
+// SPDX-License-Identifier: GPL-2.0
2
+
1
3
 #include <linux/acpi.h>
2
4
 #include <linux/cpu.h>
3
5
 #include <linux/kexec.h>
..
..
@@ -9,8 +11,10 @@
9
11
 
10
12
 #include <asm/cpu.h>
11
13
 #include <asm/smp.h>
14
+#include <asm/io_apic.h>
12
15
 #include <asm/reboot.h>
13
16
 #include <asm/setup.h>
17
+#include <asm/idtentry.h>
14
18
 #include <asm/hypervisor.h>
15
19
 #include <asm/e820/api.h>
16
20
 #include <asm/early_ioremap.h>
..
..
@@ -116,6 +120,17 @@
116
120
 		this_cpu_write(xen_vcpu_id, smp_processor_id());
117
121
 }
118
122
 
123
+DEFINE_IDTENTRY_SYSVEC(sysvec_xen_hvm_callback)
124
+{
125
+	struct pt_regs *old_regs = set_irq_regs(regs);
126
+
127
+	inc_irq_stat(irq_hv_callback_count);
128
+
129
+	xen_hvm_evtchn_do_upcall();
130
+
131
+	set_irq_regs(old_regs);
132
+}
133
+
119
134
 #ifdef CONFIG_KEXEC_CORE
120
135
 static void xen_hvm_shutdown(void)
121
136
 {
..
..
@@ -173,6 +188,8 @@
173
188
        return 0;
174
189
 }
175
190
 
191
+static bool no_vector_callback __initdata;
192
+
176
193
 static void __init xen_hvm_guest_init(void)
177
194
 {
178
195
 	if (xen_pv_domain())
..
..
@@ -192,7 +209,7 @@
192
209
 
193
210
 	xen_panic_handler_init();
194
211
 
195
-	if (xen_feature(XENFEAT_hvm_callback_vector))
212
+	if (!no_vector_callback && xen_feature(XENFEAT_hvm_callback_vector))
196
213
 		xen_have_vector_callback = 1;
197
214
 
198
215
 	xen_hvm_smp_init();
..
..
@@ -208,18 +225,25 @@
208
225
 #endif
209
226
 }
210
227
 
211
-static bool xen_nopv;
212
228
 static __init int xen_parse_nopv(char *arg)
213
229
 {
214
-       xen_nopv = true;
215
-       return 0;
230
+	pr_notice("\"xen_nopv\" is deprecated, please use \"nopv\" instead\n");
231
+
232
+	if (xen_cpuid_base())
233
+		nopv = true;
234
+	return 0;
216
235
 }
217
236
 early_param("xen_nopv", xen_parse_nopv);
218
237
 
219
-bool xen_hvm_need_lapic(void)
238
+static __init int xen_parse_no_vector_callback(char *arg)
220
239
 {
221
-	if (xen_nopv)
222
-		return false;
240
+	no_vector_callback = true;
241
+	return 0;
242
+}
243
+early_param("xen_no_vector_callback", xen_parse_no_vector_callback);
244
+
245
+bool __init xen_hvm_need_lapic(void)
246
+{
223
247
 	if (xen_pv_domain())
224
248
 		return false;
225
249
 	if (!xen_hvm_domain())
..
..
@@ -227,15 +251,6 @@
227
251
 	if (xen_feature(XENFEAT_hvm_pirqs) && xen_have_vector_callback)
228
252
 		return false;
229
253
 	return true;
230
-}
231
-EXPORT_SYMBOL_GPL(xen_hvm_need_lapic);
232
-
233
-static uint32_t __init xen_platform_hvm(void)
234
-{
235
-	if (xen_pv_domain() || xen_nopv)
236
-		return 0;
237
-
238
-	return xen_cpuid_base();
239
254
 }
240
255
 
241
256
 static __init void xen_hvm_guest_late_init(void)
..
..
@@ -249,6 +264,9 @@
249
264
 	/* PVH detected. */
250
265
 	xen_pvh = true;
251
266
 
267
+	if (nopv)
268
+		panic("\"nopv\" and \"xen_nopv\" parameters are unsupported in PVH guest.");
269
+
252
270
 	/* Make sure we don't fall back to (default) ACPI_IRQ_MODEL_PIC. */
253
271
 	if (!nr_ioapics && acpi_irq_model == ACPI_IRQ_MODEL_PIC)
254
272
 		acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
..
..
@@ -258,7 +276,38 @@
258
276
 #endif
259
277
 }
260
278
 
261
-const __initconst struct hypervisor_x86 x86_hyper_xen_hvm = {
279
+static uint32_t __init xen_platform_hvm(void)
280
+{
281
+	uint32_t xen_domain = xen_cpuid_base();
282
+	struct x86_hyper_init *h = &x86_hyper_xen_hvm.init;
283
+
284
+	if (xen_pv_domain())
285
+		return 0;
286
+
287
+	if (xen_pvh_domain() && nopv) {
288
+		/* Guest booting via the Xen-PVH boot entry goes here */
289
+		pr_info("\"nopv\" parameter is ignored in PVH guest\n");
290
+		nopv = false;
291
+	} else if (nopv && xen_domain) {
292
+		/*
293
+		 * Guest booting via normal boot entry (like via grub2) goes
294
+		 * here.
295
+		 *
296
+		 * Use interface functions for bare hardware if nopv,
297
+		 * xen_hvm_guest_late_init is an exception as we need to
298
+		 * detect PVH and panic there.
299
+		 */
300
+		h->init_platform = x86_init_noop;
301
+		h->x2apic_available = bool_x86_init_noop;
302
+		h->init_mem_mapping = x86_init_noop;
303
+		h->init_after_bootmem = x86_init_noop;
304
+		h->guest_late_init = xen_hvm_guest_late_init;
305
+		x86_hyper_xen_hvm.runtime.pin_vcpu = x86_op_int_noop;
306
+	}
307
+	return xen_domain;
308
+}
309
+
310
+struct hypervisor_x86 x86_hyper_xen_hvm __initdata = {
262
311
 	.name                   = "Xen HVM",
263
312
 	.detect                 = xen_platform_hvm,
264
313
 	.type			= X86_HYPER_XEN_HVM,
..
..
@@ -267,4 +316,5 @@
267
316
 	.init.init_mem_mapping	= xen_hvm_init_mem_mapping,
268
317
 	.init.guest_late_init	= xen_hvm_guest_late_init,
269
318
 	.runtime.pin_vcpu       = xen_pin_vcpu,
319
+	.ignore_nopv            = true,
270
320
 };