diff options
author | Stefan Hajnoczi <stefanha@redhat.com> | 2023-09-19 13:22:18 -0400 |
---|---|---|
committer | Stefan Hajnoczi <stefanha@redhat.com> | 2023-09-19 13:22:19 -0400 |
commit | 4907644841e3200aea6475c0f72d3d987e9f3d93 (patch) | |
tree | 962232f0bc6da95c938bcb3088e5b45ef64cb706 /include/exec | |
parent | 1361bba536ccb49b20ce0b915e7f552d61717f51 (diff) | |
parent | 544cff46c018036cd66e98ffb224dd9f098065c8 (diff) |
Merge tag 'mem-2023-09-19' of https://github.com/davidhildenbrand/qemu into staging
Hi,
"Host Memory Backends" and "Memory devices" queue ("mem"):
- Support and document VM templating with R/O files using a new "rom"
parameter for memory-backend-file
- Some cleanups and fixes around NVDIMMs and R/O file handling for guest
RAM
- Optimize ioeventfd updates by skipping address spaces that are not
applicable
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# gpg: Signature made Tue 19 Sep 2023 06:25:45 EDT
# gpg: using RSA key 1BD9CAAD735C4C3A460DFCCA4DDE10F700FF835A
# gpg: issuer "david@redhat.com"
# gpg: Good signature from "David Hildenbrand <david@redhat.com>" [unknown]
# gpg: aka "David Hildenbrand <davidhildenbrand@gmail.com>" [full]
# gpg: aka "David Hildenbrand <hildenbr@in.tum.de>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1BD9 CAAD 735C 4C3A 460D FCCA 4DDE 10F7 00FF 835A
* tag 'mem-2023-09-19' of https://github.com/davidhildenbrand/qemu:
memory: avoid updating ioeventfds for some address_space
machine: Improve error message when using default RAM backend id
softmmu/physmem: Hint that "readonly=on,rom=off" exists when opening file R/W for private mapping fails
docs: Start documenting VM templating
docs: Don't mention "-mem-path" in multi-process.rst
softmmu/physmem: Never return directories from file_ram_open()
softmmu/physmem: Fail creation of new files in file_ram_open() with readonly=true
softmmu/physmem: Bail out early in ram_block_discard_range() with readonly files
softmmu/physmem: Remap with proper protection in qemu_ram_remap()
backends/hostmem-file: Add "rom" property to support VM templating with R/O files
softmmu/physmem: Distinguish between file access mode and mmap protection
nvdimm: Reject writing label data to ROM instead of crashing QEMU
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include/exec')
-rw-r--r-- | include/exec/memory.h | 15 | ||||
-rw-r--r-- | include/exec/ram_addr.h | 8 |
2 files changed, 15 insertions, 8 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index 68284428f8..ef23d65afc 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -235,6 +235,12 @@ typedef struct IOMMUTLBEvent { /* RAM is an mmap-ed named file */ #define RAM_NAMED_FILE (1 << 9) +/* RAM is mmap-ed read-only */ +#define RAM_READONLY (1 << 10) + +/* RAM FD is opened read-only */ +#define RAM_READONLY_FD (1 << 11) + static inline void iommu_notifier_init(IOMMUNotifier *n, IOMMUNotify fn, IOMMUNotifierFlag flags, hwaddr start, hwaddr end, @@ -1089,6 +1095,7 @@ struct AddressSpace { struct FlatView *current_map; int ioeventfd_nb; + int ioeventfd_notifiers; struct MemoryRegionIoeventfd *ioeventfds; QTAILQ_HEAD(, MemoryListener) listeners; QTAILQ_ENTRY(AddressSpace) address_spaces_link; @@ -1331,10 +1338,10 @@ void memory_region_init_resizeable_ram(MemoryRegion *mr, * @align: alignment of the region base address; if 0, the default alignment * (getpagesize()) will be used. * @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_PMEM, - * RAM_NORESERVE, + * RAM_NORESERVE, RAM_PROTECTED, RAM_NAMED_FILE, RAM_READONLY, + * RAM_READONLY_FD * @path: the path in which to allocate the RAM. * @offset: offset within the file referenced by path - * @readonly: true to open @path for reading, false for read/write. * @errp: pointer to Error*, to store an error if it happens. * * Note that this function does not do anything to cause the data in the @@ -1348,7 +1355,6 @@ void memory_region_init_ram_from_file(MemoryRegion *mr, uint32_t ram_flags, const char *path, ram_addr_t offset, - bool readonly, Error **errp); /** @@ -1360,7 +1366,8 @@ void memory_region_init_ram_from_file(MemoryRegion *mr, * @name: the name of the region. * @size: size of the region. * @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_PMEM, - * RAM_NORESERVE, RAM_PROTECTED. + * RAM_NORESERVE, RAM_PROTECTED, RAM_NAMED_FILE, RAM_READONLY, + * RAM_READONLY_FD * @fd: the fd to mmap. * @offset: offset within the file referenced by fd * @errp: pointer to Error*, to store an error if it happens. diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index 9f2e3893f5..90676093f5 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -108,10 +108,10 @@ long qemu_maxrampagesize(void); * @size: the size in bytes of the ram block * @mr: the memory region where the ram block is * @ram_flags: RamBlock flags. Supported flags: RAM_SHARED, RAM_PMEM, - * RAM_NORESERVE. + * RAM_NORESERVE, RAM_PROTECTED, RAM_NAMED_FILE, RAM_READONLY, + * RAM_READONLY_FD * @mem_path or @fd: specify the backing file or device * @offset: Offset into target file - * @readonly: true to open @path for reading, false for read/write. * @errp: pointer to Error*, to store an error if it happens * * Return: @@ -120,10 +120,10 @@ long qemu_maxrampagesize(void); */ RAMBlock *qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr, uint32_t ram_flags, const char *mem_path, - off_t offset, bool readonly, Error **errp); + off_t offset, Error **errp); RAMBlock *qemu_ram_alloc_from_fd(ram_addr_t size, MemoryRegion *mr, uint32_t ram_flags, int fd, off_t offset, - bool readonly, Error **errp); + Error **errp); RAMBlock *qemu_ram_alloc_from_ptr(ram_addr_t size, void *host, MemoryRegion *mr, Error **errp); |