Re: [Xen-devel] [PATCH v9 04/19] amd64: introduce hook for custom preload metadata parsers
On 03/01/14 21:59, Konrad Rzeszutek Wilk wrote:
On Thu, Jan 02, 2014 at 04:43:38PM +0100, Roger Pau Monne wrote:
---
sys/amd64/amd64/machdep.c | 41 --
sys/amd64/include/sysarch.h | 12 ++
sys/x86/xen/pv.c| 82
+++
3 files changed, 124 insertions(+), 11 deletions(-)
diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c
index eae657b..e073eea 100644
--- a/sys/amd64/amd64/machdep.c
+++ b/sys/amd64/amd64/machdep.c
@@ -126,6 +126,7 @@ __FBSDID($FreeBSD$);
#include machine/reg.h
#include machine/sigframe.h
#include machine/specialreg.h
+#include machine/sysarch.h
#ifdef PERFMON
#include machine/perfmon.h
#endif
@@ -165,6 +166,14 @@ static int set_fpcontext(struct thread *td, const
mcontext_t *mcp,
char *xfpustate, size_t xfpustate_len);
SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
+/* Preload data parse function */
+static caddr_t native_parse_preload_data(u_int64_t);
+
+/* Default init_ops implementation. */
+struct init_ops init_ops = {
+.parse_preload_data = native_parse_preload_data,
Extra space there.
It's for alignment, looks strange now because there's only one hook.
+};
+
/*
* The file conf/ldscript.amd64 defines the symbol kernphys. Its value
is
* the physical address at which the kernel is loaded.
@@ -1683,6 +1692,26 @@ do_next:
msgbufp = (struct msgbuf *)PHYS_TO_DMAP(phys_avail[pa_indx]);
}
+static caddr_t
+native_parse_preload_data(u_int64_t modulep)
+{
+caddr_t kmdp;
+
+preload_metadata = (caddr_t)(uintptr_t)(modulep + KERNBASE);
Two casts? Could it be done via one?
+preload_bootstrap_relocate(KERNBASE);
+kmdp = preload_search_by_type(elf kernel);
+if (kmdp == NULL)
+kmdp = preload_search_by_type(elf64 kernel);
+boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
+kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *) + KERNBASE;
+#ifdef DDB
+ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
+ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
+#endif
+
+return (kmdp);
+}
+
u_int64_t
hammer_time(u_int64_t modulep, u_int64_t physfree)
{
@@ -1707,17 +1736,7 @@ hammer_time(u_int64_t modulep, u_int64_t physfree)
*/
proc_linkup0(proc0, thread0);
-preload_metadata = (caddr_t)(uintptr_t)(modulep + KERNBASE);
Oh, you just moved the code - right, lets not modify it in this patch.
Yes, it's just code movement.
-preload_bootstrap_relocate(KERNBASE);
-kmdp = preload_search_by_type(elf kernel);
-if (kmdp == NULL)
-kmdp = preload_search_by_type(elf64 kernel);
-boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
-kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *) + KERNBASE;
-#ifdef DDB
-ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
-ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
-#endif
+kmdp = init_ops.parse_preload_data(modulep);
/* Init basic tunables, hz etc */
init_param1();
diff --git a/sys/amd64/include/sysarch.h b/sys/amd64/include/sysarch.h
index cd380d4..58ac8cd 100644
--- a/sys/amd64/include/sysarch.h
+++ b/sys/amd64/include/sysarch.h
@@ -4,3 +4,15 @@
/* $FreeBSD$ */
#include x86/sysarch.h
+
+/*
+ * Struct containing pointers to init functions whose
+ * implementation is run time selectable. Selection can be made,
+ * for example, based on detection of a BIOS variant or
+ * hypervisor environment.
+ */
+struct init_ops {
+caddr_t (*parse_preload_data)(u_int64_t);
+};
+
+extern struct init_ops init_ops;
diff --git a/sys/x86/xen/pv.c b/sys/x86/xen/pv.c
index db3b7a3..908b50b 100644
--- a/sys/x86/xen/pv.c
+++ b/sys/x86/xen/pv.c
@@ -46,6 +46,8 @@ __FBSDID($FreeBSD$);
#include vm/vm_pager.h
#include vm/vm_param.h
+#include machine/sysarch.h
+
#include xen/xen-os.h
#include xen/hypervisor.h
@@ -54,6 +56,36 @@ extern u_int64_t hammer_time(u_int64_t, u_int64_t);
/* Xen initial function */
extern u_int64_t hammer_time_xen(start_info_t *, u_int64_t);
+/*--- Forward Declarations
---*/
+static caddr_t xen_pv_parse_preload_data(u_int64_t);
+
+static void xen_pv_set_init_ops(void);
+
+/* Global Data
---*/
+/* Xen init_ops implementation. */
+struct init_ops xen_init_ops = {
+.parse_preload_data = xen_pv_parse_preload_data,
+};
+
+static struct
+{
+const char *ev;
+int mask;
+} howto_names[] = {
+{boot_askname,RB_ASKNAME},
+{boot_single, RB_SINGLE},
+{boot_nosync, RB_NOSYNC},
+{boot_halt, RB_ASKNAME},
+{boot_serial, RB_SERIAL},
+{boot_cdrom, RB_CDROM},
+{boot_gdb,RB_GDB},
+{boot_gdb_pause, RB_RESERVED1},
+
Re: [Xen-devel] [PATCH v9 04/19] amd64: introduce hook for custom preload metadata parsers
On Thu, Jan 02, 2014 at 04:43:38PM +0100, Roger Pau Monne wrote:
---
sys/amd64/amd64/machdep.c | 41 --
sys/amd64/include/sysarch.h | 12 ++
sys/x86/xen/pv.c| 82
+++
3 files changed, 124 insertions(+), 11 deletions(-)
diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c
index eae657b..e073eea 100644
--- a/sys/amd64/amd64/machdep.c
+++ b/sys/amd64/amd64/machdep.c
@@ -126,6 +126,7 @@ __FBSDID($FreeBSD$);
#include machine/reg.h
#include machine/sigframe.h
#include machine/specialreg.h
+#include machine/sysarch.h
#ifdef PERFMON
#include machine/perfmon.h
#endif
@@ -165,6 +166,14 @@ static int set_fpcontext(struct thread *td, const
mcontext_t *mcp,
char *xfpustate, size_t xfpustate_len);
SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
+/* Preload data parse function */
+static caddr_t native_parse_preload_data(u_int64_t);
+
+/* Default init_ops implementation. */
+struct init_ops init_ops = {
+ .parse_preload_data = native_parse_preload_data,
Extra space there.
+};
+
/*
* The file conf/ldscript.amd64 defines the symbol kernphys. Its value
is
* the physical address at which the kernel is loaded.
@@ -1683,6 +1692,26 @@ do_next:
msgbufp = (struct msgbuf *)PHYS_TO_DMAP(phys_avail[pa_indx]);
}
+static caddr_t
+native_parse_preload_data(u_int64_t modulep)
+{
+ caddr_t kmdp;
+
+ preload_metadata = (caddr_t)(uintptr_t)(modulep + KERNBASE);
Two casts? Could it be done via one?
+ preload_bootstrap_relocate(KERNBASE);
+ kmdp = preload_search_by_type(elf kernel);
+ if (kmdp == NULL)
+ kmdp = preload_search_by_type(elf64 kernel);
+ boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
+ kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *) + KERNBASE;
+#ifdef DDB
+ ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
+ ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
+#endif
+
+ return (kmdp);
+}
+
u_int64_t
hammer_time(u_int64_t modulep, u_int64_t physfree)
{
@@ -1707,17 +1736,7 @@ hammer_time(u_int64_t modulep, u_int64_t physfree)
*/
proc_linkup0(proc0, thread0);
- preload_metadata = (caddr_t)(uintptr_t)(modulep + KERNBASE);
Oh, you just moved the code - right, lets not modify it in this patch.
- preload_bootstrap_relocate(KERNBASE);
- kmdp = preload_search_by_type(elf kernel);
- if (kmdp == NULL)
- kmdp = preload_search_by_type(elf64 kernel);
- boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
- kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *) + KERNBASE;
-#ifdef DDB
- ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
- ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
-#endif
+ kmdp = init_ops.parse_preload_data(modulep);
/* Init basic tunables, hz etc */
init_param1();
diff --git a/sys/amd64/include/sysarch.h b/sys/amd64/include/sysarch.h
index cd380d4..58ac8cd 100644
--- a/sys/amd64/include/sysarch.h
+++ b/sys/amd64/include/sysarch.h
@@ -4,3 +4,15 @@
/* $FreeBSD$ */
#include x86/sysarch.h
+
+/*
+ * Struct containing pointers to init functions whose
+ * implementation is run time selectable. Selection can be made,
+ * for example, based on detection of a BIOS variant or
+ * hypervisor environment.
+ */
+struct init_ops {
+ caddr_t (*parse_preload_data)(u_int64_t);
+};
+
+extern struct init_ops init_ops;
diff --git a/sys/x86/xen/pv.c b/sys/x86/xen/pv.c
index db3b7a3..908b50b 100644
--- a/sys/x86/xen/pv.c
+++ b/sys/x86/xen/pv.c
@@ -46,6 +46,8 @@ __FBSDID($FreeBSD$);
#include vm/vm_pager.h
#include vm/vm_param.h
+#include machine/sysarch.h
+
#include xen/xen-os.h
#include xen/hypervisor.h
@@ -54,6 +56,36 @@ extern u_int64_t hammer_time(u_int64_t, u_int64_t);
/* Xen initial function */
extern u_int64_t hammer_time_xen(start_info_t *, u_int64_t);
+/*--- Forward Declarations
---*/
+static caddr_t xen_pv_parse_preload_data(u_int64_t);
+
+static void xen_pv_set_init_ops(void);
+
+/* Global Data
---*/
+/* Xen init_ops implementation. */
+struct init_ops xen_init_ops = {
+ .parse_preload_data = xen_pv_parse_preload_data,
+};
+
+static struct
+{
+ const char *ev;
+ int mask;
+} howto_names[] = {
+ {boot_askname,RB_ASKNAME},
+ {boot_single, RB_SINGLE},
+ {boot_nosync, RB_NOSYNC},
+ {boot_halt, RB_ASKNAME},
+ {boot_serial, RB_SERIAL},
+ {boot_cdrom, RB_CDROM},
+ {boot_gdb,RB_GDB},
+ {boot_gdb_pause, RB_RESERVED1},
+ {boot_verbose,RB_VERBOSE},
+ {boot_multicons, RB_MULTIPLE},
+ {NULL, 0}
+};
+
