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| author | Marc-André Lureau <marcandre.lureau@redhat.com> | 2018-10-03 15:44:52 +0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-11-06 21:35:05 +0100 |
| commit | c26763f8ec70b1011098cab0da9178666d8256a5 (patch) | |
| tree | 58f08cb76a279fdb86ad4cb36b5c4c6b527488cc /include/exec/memory.h | |
| parent | 1a1435dd61e28c1e3b70971107d72a7d05b28d03 (diff) | |
| download | focaccia-qemu-c26763f8ec70b1011098cab0da9178666d8256a5.tar.gz focaccia-qemu-c26763f8ec70b1011098cab0da9178666d8256a5.zip | |
memory: learn about non-volatile memory region
Add a new flag to mark memory region that are used as non-volatile, by NVDIMM for example. That bit is propagated down to the flat view, and reflected in HMP info mtree with a "nv-" prefix on the memory type. This way, guest_phys_blocks_region_add() can skip the NV memory regions for dumps and TCG memory clear in a following patch. Cc: dgilbert@redhat.com Cc: imammedo@redhat.com Cc: pbonzini@redhat.com Cc: guangrong.xiao@linux.intel.com Cc: mst@redhat.com Cc: xiaoguangrong.eric@gmail.com Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20181003114454.5662-2-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/exec/memory.h')
| -rw-r--r-- | include/exec/memory.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index d0c7f0d9e9..8e61450de3 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -355,6 +355,7 @@ struct MemoryRegion { bool ram; bool subpage; bool readonly; /* For RAM regions */ + bool nonvolatile; bool rom_device; bool flush_coalesced_mmio; bool global_locking; @@ -480,6 +481,7 @@ static inline FlatView *address_space_to_flatview(AddressSpace *as) * @offset_within_address_space: the address of the first byte of the section * relative to the region's address space * @readonly: writes to this section are ignored + * @nonvolatile: this section is non-volatile */ struct MemoryRegionSection { MemoryRegion *mr; @@ -488,6 +490,7 @@ struct MemoryRegionSection { Int128 size; hwaddr offset_within_address_space; bool readonly; + bool nonvolatile; }; /** @@ -1170,6 +1173,17 @@ static inline bool memory_region_is_rom(MemoryRegion *mr) return mr->ram && mr->readonly; } +/** + * memory_region_is_nonvolatile: check whether a memory region is non-volatile + * + * Returns %true is a memory region is non-volatile memory. + * + * @mr: the memory region being queried + */ +static inline bool memory_region_is_nonvolatile(MemoryRegion *mr) +{ + return mr->nonvolatile; +} /** * memory_region_get_fd: Get a file descriptor backing a RAM memory region. @@ -1342,6 +1356,17 @@ void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr, void memory_region_set_readonly(MemoryRegion *mr, bool readonly); /** + * memory_region_set_nonvolatile: Turn a memory region non-volatile + * + * Allows a memory region to be marked as non-volatile. + * only useful on RAM regions. + * + * @mr: the region being updated. + * @nonvolatile: whether rhe region is to be non-volatile. + */ +void memory_region_set_nonvolatile(MemoryRegion *mr, bool nonvolatile); + +/** * memory_region_rom_device_set_romd: enable/disable ROMD mode * * Allows a ROM device (initialized with memory_region_init_rom_device() to |