diff options
Diffstat (limited to 'exec.c')
| -rw-r--r-- | exec.c | 90 |
1 files changed, 53 insertions, 37 deletions
@@ -2616,6 +2616,8 @@ static const MemoryRegionOps watch_mem_ops = { }, }; +static MemTxResult flatview_read(FlatView *fv, hwaddr addr, + MemTxAttrs attrs, uint8_t *buf, int len); static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs, const uint8_t *buf, int len); static bool flatview_access_valid(FlatView *fv, hwaddr addr, int len, @@ -3078,6 +3080,7 @@ static MemTxResult flatview_write_continue(FlatView *fv, hwaddr addr, return result; } +/* Called from RCU critical section. */ static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs, const uint8_t *buf, int len) { @@ -3086,25 +3089,14 @@ static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs, MemoryRegion *mr; MemTxResult result = MEMTX_OK; - if (len > 0) { - rcu_read_lock(); - l = len; - mr = flatview_translate(fv, addr, &addr1, &l, true); - result = flatview_write_continue(fv, addr, attrs, buf, len, - addr1, l, mr); - rcu_read_unlock(); - } + l = len; + mr = flatview_translate(fv, addr, &addr1, &l, true); + result = flatview_write_continue(fv, addr, attrs, buf, len, + addr1, l, mr); return result; } -MemTxResult address_space_write(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, - const uint8_t *buf, int len) -{ - return flatview_write(address_space_to_flatview(as), addr, attrs, buf, len); -} - /* Called within RCU critical section. */ MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr, MemTxAttrs attrs, uint8_t *buf, @@ -3175,42 +3167,61 @@ MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr, return result; } -MemTxResult flatview_read_full(FlatView *fv, hwaddr addr, - MemTxAttrs attrs, uint8_t *buf, int len) +/* Called from RCU critical section. */ +static MemTxResult flatview_read(FlatView *fv, hwaddr addr, + MemTxAttrs attrs, uint8_t *buf, int len) { hwaddr l; hwaddr addr1; MemoryRegion *mr; + + l = len; + mr = flatview_translate(fv, addr, &addr1, &l, false); + return flatview_read_continue(fv, addr, attrs, buf, len, + addr1, l, mr); +} + +MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr, + MemTxAttrs attrs, uint8_t *buf, int len) +{ MemTxResult result = MEMTX_OK; + FlatView *fv; if (len > 0) { rcu_read_lock(); - l = len; - mr = flatview_translate(fv, addr, &addr1, &l, false); - result = flatview_read_continue(fv, addr, attrs, buf, len, - addr1, l, mr); + fv = address_space_to_flatview(as); + result = flatview_read(fv, addr, attrs, buf, len); rcu_read_unlock(); } return result; } -static MemTxResult flatview_rw(FlatView *fv, hwaddr addr, MemTxAttrs attrs, - uint8_t *buf, int len, bool is_write) +MemTxResult address_space_write(AddressSpace *as, hwaddr addr, + MemTxAttrs attrs, + const uint8_t *buf, int len) { - if (is_write) { - return flatview_write(fv, addr, attrs, (uint8_t *)buf, len); - } else { - return flatview_read(fv, addr, attrs, (uint8_t *)buf, len); + MemTxResult result = MEMTX_OK; + FlatView *fv; + + if (len > 0) { + rcu_read_lock(); + fv = address_space_to_flatview(as); + result = flatview_write(fv, addr, attrs, buf, len); + rcu_read_unlock(); } + + return result; } -MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, uint8_t *buf, - int len, bool is_write) +MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, + uint8_t *buf, int len, bool is_write) { - return flatview_rw(address_space_to_flatview(as), - addr, attrs, buf, len, is_write); + if (is_write) { + return address_space_write(as, addr, attrs, buf, len); + } else { + return address_space_read_full(as, addr, attrs, buf, len); + } } void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf, @@ -3376,7 +3387,6 @@ static bool flatview_access_valid(FlatView *fv, hwaddr addr, int len, MemoryRegion *mr; hwaddr l, xlat; - rcu_read_lock(); while (len > 0) { l = len; mr = flatview_translate(fv, addr, &xlat, &l, is_write); @@ -3391,15 +3401,20 @@ static bool flatview_access_valid(FlatView *fv, hwaddr addr, int len, len -= l; addr += l; } - rcu_read_unlock(); return true; } bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write) { - return flatview_access_valid(address_space_to_flatview(as), - addr, len, is_write); + FlatView *fv; + bool result; + + rcu_read_lock(); + fv = address_space_to_flatview(as); + result = flatview_access_valid(fv, addr, len, is_write); + rcu_read_unlock(); + return result; } static hwaddr @@ -3445,7 +3460,7 @@ void *address_space_map(AddressSpace *as, hwaddr l, xlat; MemoryRegion *mr; void *ptr; - FlatView *fv = address_space_to_flatview(as); + FlatView *fv; if (len == 0) { return NULL; @@ -3453,6 +3468,7 @@ void *address_space_map(AddressSpace *as, l = len; rcu_read_lock(); + fv = address_space_to_flatview(as); mr = flatview_translate(fv, addr, &xlat, &l, is_write); if (!memory_access_is_direct(mr, is_write)) { |