[Xen-devel] [PATCH v7 10/19] xen: add hook for AP bootstrap memory reservation

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

This hook will only be implemented for bare metal, Xen doesn't require
any bootstrap code since APs are started in long mode with paging
enabled.
---
 sys/amd64/amd64/machdep.c   |    6 +++++-
 sys/amd64/include/sysarch.h |    3 +++
 2 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c
index 6bbfe5a..a811a9b 100644
--- a/sys/amd64/amd64/machdep.c
+++ b/sys/amd64/amd64/machdep.c
@@ -186,6 +186,9 @@ struct init_ops init_ops = {
        .early_delay_init =     i8254_init,
        .early_delay =          i8254_delay,
        .parse_memmap =         native_parse_memmap,
+#ifdef SMP
+       .mp_bootaddress =       mp_bootaddress,
+#endif
 };
 
 /*
@@ -1507,7 +1510,8 @@ getmemsize(caddr_t kmdp, u_int64_t first)
 
 #ifdef SMP
        /* make hole for AP bootstrap code */
-       physmap[1] = mp_bootaddress(physmap[1] / 1024);
+       if (init_ops.mp_bootaddress)
+               physmap[1] = init_ops.mp_bootaddress(physmap[1] / 1024);
 #endif
 
        /*
diff --git a/sys/amd64/include/sysarch.h b/sys/amd64/include/sysarch.h
index 084223e..77f4b29 100644
--- a/sys/amd64/include/sysarch.h
+++ b/sys/amd64/include/sysarch.h
@@ -16,6 +16,9 @@ struct init_ops {
        void    (*early_delay_init)(void);
        void    (*early_delay)(int);
        void    (*parse_memmap)(caddr_t, vm_paddr_t *, int *);
+#ifdef SMP
+       u_int   (*mp_bootaddress)(u_int);
+#endif
 };
 
 extern struct init_ops init_ops;
-- 
1.7.7.5 (Apple Git-26)


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