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| author | Peter Crosthwaite <crosthwaitepeter@gmail.com> | 2015-07-06 12:15:12 -0600 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2015-07-06 12:15:12 -0600 |
| commit | 4e51361d79289aee2985dfed472f8d87bd53a8df (patch) | |
| tree | c5c260b1336f6ba9d7f2dfc1ab927df30e40a6ce | |
| parent | 7d489dcdf5fd71b5052ffd401b869a627e1c751f (diff) | |
| download | qemu-4e51361d79289aee2985dfed472f8d87bd53a8df.zip qemu-4e51361d79289aee2985dfed472f8d87bd53a8df.tar.gz qemu-4e51361d79289aee2985dfed472f8d87bd53a8df.tar.bz2 | |
cpu-all: complete "real" host page size API
Currently the "host" page size alignment API is really aligning to both
host and target page sizes. There is the qemu_real_page_size which can
be used for the actual host page size but it's missing a mask and ALIGN
macro as provided for qemu_page_size. Complete the API. This allows
system level code that cares about the host page size to use a
consistent alignment interface without having to un-needingly align to
the target page size. This also reduces system level code dependency
on the cpu specific TARGET_PAGE_SIZE.
Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
| -rw-r--r-- | include/exec/cpu-all.h | 3 | ||||
| -rw-r--r-- | translate-all.c | 2 |
2 files changed, 5 insertions, 0 deletions
diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h index 8999634..ea6a9a6 100644 --- a/include/exec/cpu-all.h +++ b/include/exec/cpu-all.h @@ -183,10 +183,13 @@ extern unsigned long reserved_va; /* ??? These should be the larger of uintptr_t and target_ulong. */ extern uintptr_t qemu_real_host_page_size; +extern uintptr_t qemu_real_host_page_mask; extern uintptr_t qemu_host_page_size; extern uintptr_t qemu_host_page_mask; #define HOST_PAGE_ALIGN(addr) (((addr) + qemu_host_page_size - 1) & qemu_host_page_mask) +#define REAL_HOST_PAGE_ALIGN(addr) (((addr) + qemu_real_host_page_size - 1) & \ + qemu_real_host_page_mask) /* same as PROT_xxx */ #define PAGE_READ 0x0001 diff --git a/translate-all.c b/translate-all.c index 412bc90..50d53fd 100644 --- a/translate-all.c +++ b/translate-all.c @@ -118,6 +118,7 @@ typedef struct PageDesc { #define V_L1_SHIFT (L1_MAP_ADDR_SPACE_BITS - TARGET_PAGE_BITS - V_L1_BITS) uintptr_t qemu_real_host_page_size; +uintptr_t qemu_real_host_page_mask; uintptr_t qemu_host_page_size; uintptr_t qemu_host_page_mask; @@ -307,6 +308,7 @@ void page_size_init(void) /* NOTE: we can always suppose that qemu_host_page_size >= TARGET_PAGE_SIZE */ qemu_real_host_page_size = getpagesize(); + qemu_real_host_page_mask = ~(qemu_real_host_page_size - 1); if (qemu_host_page_size == 0) { qemu_host_page_size = qemu_real_host_page_size; } |