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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v7 12/19] xen: add a hook to perform AP startup
AP startup on PVH follows the PV method, so we need to add a hook in
order to diverge from bare metal.
---
sys/amd64/amd64/mp_machdep.c | 16 ++++---
sys/amd64/include/cpu.h | 1 +
sys/x86/xen/hvm.c | 17 +++++++-
sys/x86/xen/pv.c | 90 ++++++++++++++++++++++++++++++++++++++++++
sys/xen/pv.h | 1 +
5 files changed, 117 insertions(+), 8 deletions(-)
diff --git a/sys/amd64/amd64/mp_machdep.c b/sys/amd64/amd64/mp_machdep.c
index 4ef4b3d..e302886 100644
--- a/sys/amd64/amd64/mp_machdep.c
+++ b/sys/amd64/amd64/mp_machdep.c
@@ -90,7 +90,7 @@ extern struct pcpu __pcpu[];
/* AP uses this during bootstrap. Do not staticize. */
char *bootSTK;
-static int bootAP;
+int bootAP;
/* Free these after use */
void *bootstacks[MAXCPU];
@@ -122,9 +122,12 @@ u_long *ipi_rendezvous_counts[MAXCPU];
static u_long *ipi_hardclock_counts[MAXCPU];
#endif
+int native_start_all_aps(void);
+
/* Default cpu_ops implementation. */
struct cpu_ops cpu_ops = {
- .ipi_vectored = lapic_ipi_vectored
+ .ipi_vectored = lapic_ipi_vectored,
+ .start_all_aps = native_start_all_aps,
};
extern inthand_t IDTVEC(fast_syscall), IDTVEC(fast_syscall32);
@@ -138,7 +141,7 @@ extern int pmap_pcid_enabled;
static volatile cpuset_t ipi_nmi_pending;
/* used to hold the AP's until we are ready to release them */
-static struct mtx ap_boot_mtx;
+struct mtx ap_boot_mtx;
/* Set to 1 once we're ready to let the APs out of the pen. */
static volatile int aps_ready = 0;
@@ -165,7 +168,6 @@ static int cpu_cores; /* cores per
package */
static void assign_cpu_ids(void);
static void set_interrupt_apic_ids(void);
-static int start_all_aps(void);
static int start_ap(int apic_id);
static void release_aps(void *dummy);
@@ -569,7 +571,7 @@ cpu_mp_start(void)
assign_cpu_ids();
/* Start each Application Processor */
- start_all_aps();
+ cpu_ops.start_all_aps();
set_interrupt_apic_ids();
}
@@ -908,8 +910,8 @@ assign_cpu_ids(void)
/*
* start each AP in our list
*/
-static int
-start_all_aps(void)
+int
+native_start_all_aps(void)
{
vm_offset_t va = boot_address + KERNBASE;
u_int64_t *pt4, *pt3, *pt2;
diff --git a/sys/amd64/include/cpu.h b/sys/amd64/include/cpu.h
index 3d9ff531..ed9f1db 100644
--- a/sys/amd64/include/cpu.h
+++ b/sys/amd64/include/cpu.h
@@ -64,6 +64,7 @@ struct cpu_ops {
void (*cpu_init)(void);
void (*cpu_resume)(void);
void (*ipi_vectored)(u_int, int);
+ int (*start_all_aps)(void);
};
extern struct cpu_ops cpu_ops;
diff --git a/sys/x86/xen/hvm.c b/sys/x86/xen/hvm.c
index fb1ed79..5ec9f3a 100644
--- a/sys/x86/xen/hvm.c
+++ b/sys/x86/xen/hvm.c
@@ -53,6 +53,9 @@ __FBSDID("$FreeBSD$");
#include <xen/hypervisor.h>
#include <xen/hvm.h>
#include <xen/xen_intr.h>
+#ifdef __amd64__
+#include <xen/pv.h>
+#endif
#include <xen/interface/hvm/params.h>
#include <xen/interface/vcpu.h>
@@ -97,6 +100,11 @@ extern void pmap_lazyfix_action(void);
/* Variables used by mp_machdep to perform the bitmap IPI */
extern volatile u_int cpu_ipi_pending[MAXCPU];
+#ifdef __amd64__
+/* Native AP start used on PVHVM */
+extern int native_start_all_aps(void);
+#endif
+
/*---------------------------------- Macros
----------------------------------*/
#define IPI_TO_IDX(ipi) ((ipi) - APIC_IPI_INTS)
@@ -119,7 +127,10 @@ enum xen_domain_type xen_domain_type = XEN_NATIVE;
struct cpu_ops xen_hvm_cpu_ops = {
.ipi_vectored = lapic_ipi_vectored,
.cpu_init = xen_hvm_cpu_init,
- .cpu_resume = xen_hvm_cpu_resume
+ .cpu_resume = xen_hvm_cpu_resume,
+#ifdef __amd64__
+ .start_all_aps = native_start_all_aps,
+#endif
};
static MALLOC_DEFINE(M_XENHVM, "xen_hvm", "Xen HVM PV Support");
@@ -698,6 +709,10 @@ xen_hvm_init(enum xen_hvm_init_type init_type)
setup_xen_features();
cpu_ops = xen_hvm_cpu_ops;
vm_guest = VM_GUEST_XEN;
+#ifdef __amd64__
+ if (xen_pv_domain())
+ cpu_ops.start_all_aps = xen_pv_start_all_aps;
+#endif
break;
case XEN_HVM_INIT_RESUME:
if (error != 0)
diff --git a/sys/x86/xen/pv.c b/sys/x86/xen/pv.c
index db576e0..7e45a83 100644
--- a/sys/x86/xen/pv.c
+++ b/sys/x86/xen/pv.c
@@ -34,21 +34,43 @@ __FBSDID("$FreeBSD$");
#include <sys/kernel.h>
#include <sys/reboot.h>
#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/smp.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_extern.h>
+#include <vm/vm_kern.h>
#include <machine/sysarch.h>
#include <machine/clock.h>
#include <machine/pc/bios.h>
+#include <machine/smp.h>
#include <xen/xen-os.h>
#include <xen/pv.h>
#include <xen/hypervisor.h>
+#include <xen/interface/vcpu.h>
+
#define MAX_E820_ENTRIES 128
/*--------------------------- Forward Declarations
---------------------------*/
static caddr_t xen_pv_parse_preload_data(u_int64_t);
static void xen_pv_parse_memmap(caddr_t, vm_paddr_t *, int *);
+/*---------------------------- Extern Declarations
---------------------------*/
+/* Variables used by amd64 mp_machdep to start APs */
+extern struct mtx ap_boot_mtx;
+extern void *bootstacks[];
+extern char *doublefault_stack;
+extern char *nmi_stack;
+extern void *dpcpu;
+extern int bootAP;
+extern char *bootSTK;
+
/*-------------------------------- Global Data
-------------------------------*/
/* Xen init_ops implementation. */
struct init_ops xen_init_ops = {
@@ -78,6 +100,74 @@ static struct
static struct bios_smap xen_smap[MAX_E820_ENTRIES];
+static int
+start_xen_ap(int cpu)
+{
+ struct vcpu_guest_context *ctxt;
+ int ms, cpus = mp_naps;
+
+ ctxt = malloc(sizeof(*ctxt), M_TEMP, M_NOWAIT | M_ZERO);
+ if (ctxt == NULL)
+ panic("unable to allocate memory");
+
+ ctxt->flags = VGCF_IN_KERNEL;
+ ctxt->user_regs.rip = (unsigned long) init_secondary;
+ ctxt->user_regs.rsp = (unsigned long) bootSTK;
+
+ /* Set the AP to use the same page tables */
+ ctxt->ctrlreg[3] = KPML4phys;
+
+ if (HYPERVISOR_vcpu_op(VCPUOP_initialise, cpu, ctxt))
+ panic("unable to initialize AP#%d\n", cpu);
+
+ free(ctxt, M_TEMP);
+
+ /* Launch the vCPU */
+ if (HYPERVISOR_vcpu_op(VCPUOP_up, cpu, NULL))
+ panic("unable to start AP#%d\n", cpu);
+
+ /* Wait up to 5 seconds for it to start. */
+ for (ms = 0; ms < 5000; ms++) {
+ if (mp_naps > cpus)
+ return (1); /* return SUCCESS */
+ DELAY(1000);
+ }
+
+ return (0);
+}
+
+int
+xen_pv_start_all_aps(void)
+{
+ int cpu;
+
+ mtx_init(&ap_boot_mtx, "ap boot", NULL, MTX_SPIN);
+
+ for (cpu = 1; cpu < mp_ncpus; cpu++) {
+
+ /* allocate and set up an idle stack data page */
+ bootstacks[cpu] = (void *)kmem_malloc(kernel_arena,
+ KSTACK_PAGES * PAGE_SIZE, M_WAITOK | M_ZERO);
+ doublefault_stack = (char *)kmem_malloc(kernel_arena,
+ PAGE_SIZE, M_WAITOK | M_ZERO);
+ nmi_stack = (char *)kmem_malloc(kernel_arena, PAGE_SIZE,
+ M_WAITOK | M_ZERO);
+ dpcpu = (void *)kmem_malloc(kernel_arena, DPCPU_SIZE,
+ M_WAITOK | M_ZERO);
+
+ bootSTK = (char *)bootstacks[cpu] + KSTACK_PAGES * PAGE_SIZE -
8;
+ bootAP = cpu;
+
+ /* attempt to start the Application Processor */
+ if (!start_xen_ap(cpu))
+ panic("AP #%d failed to start!", cpu);
+
+ CPU_SET(cpu, &all_cpus); /* record AP in CPU map */
+ }
+
+ return (mp_naps);
+}
+
/*
* Functions to convert the "extra" parameters passed by Xen
* into FreeBSD boot options (from the i386 Xen port).
diff --git a/sys/xen/pv.h b/sys/xen/pv.h
index 71b8776..60d9def 100644
--- a/sys/xen/pv.h
+++ b/sys/xen/pv.h
@@ -24,5 +24,6 @@
#define __XEN_PV_H__
void xen_pv_set_init_ops(void);
+int xen_pv_start_all_aps(void);
#endif /* __XEN_PV_H__ */
--
1.7.7.5 (Apple Git-26)
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