Re: [PATCH 00/86] refactor main RAM allocation to use hostmem backend

[Igor Mammedov <imammedo@redhat.com>]

On Tue, 31 Dec 2019 16:58:10 +0100
Philippe Mathieu-Daudé <philmd@redhat.com> wrote:

> Hi Igor,
> 
> On 12/31/19 2:02 PM, Igor Mammedov wrote:
> > Series removes ad hoc RAM allocation API (memory_region_allocate_system_memory)
> > and consolidates it around hostmem backend. It allows to
> >   * resolve conflicts between global -mem-prealloc and hostmem's "policy" option
> >     fixing premature allocation before binding policy is applied
> >   * simplify complicated memory allocation routines which had to deal with 2 ways
> >     to allocate RAM.
> >   * it allows to reuse hostmem backends of a choice for main RAM without adding
> >     extra CLI options to duplicate hostmem features.
> >     Recent case was -mem-shared, to enable vhost-user on targets that don't
> >     support hostmem backends [1] (ex: s390)
> >   * move RAM allocation from individual boards into generic machine code and
> >     provide them with prepared MemoryRegion.
> >   * clean up deprecated NUMA features which were tied to the old API (see patches)
> >      - "numa: remove deprecated -mem-path fallback to anonymous RAM"
> >      - "numa: remove deprecated implicit RAM distribution between nodes"
> >      - "forbid '-numa node,mem' for 5.0 and newer machine types"
> > 
> > Conversion introduces a new machine.ram-memdev property and wrapper code that
> > aliases global -mem-path and -mem-alloc into automatically created hostmem
> > backend properties (provided ram-memdev was not set explicitly by user).
> > And then follows bulk of trivial patches that incrementally convert individual
> > boards to using machine.ram-memdev provided MemoryRegion.
> > 
> > Board conversion typically involves:
> >   * providing MachineClass::default_ram_size and MachineClass::default_ram_id
> >     so generic code could create default backend if user didn't explicitly provide
> >     ram-memdev or -m options
> >   * dropping memory_region_allocate_system_memory() call
> >   * using covinience MachineState::ram MemoryRegion, which points to MemoryRegion
> >     allocated by ram-memdev
> > On top of that for some boards:
> >   * added missing ram_size checks (typically it were boards with fixed ram size)
> >   * ram_size fixups were replaced by checks and hard errors, forcing user to
> >     provide correct "-m" values instead of ignoring it and continuing running.
> >     
> > After all boards are converted the old API is removed and memory allocation
> > routines are cleaned up.
> 
> I'm replying to the cover because multiple patches are concerned.
> 
> Compiling arm/lm32/mips64el/ppc on 32-bit host I get:
Thanks for spotting it.
I was thinking that travis-ci did 32-bit builds (I was wrong).
I'll dig up 32-bit machine and try to fix build issues.

> 
>    CC      hw/arm/digic_boards.o
> hw/arm/digic_boards.c: In function 'digic4_board_init':
> hw/arm/digic_boards.c:57:22: error: format '%lli' expects argument of 
> type 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned 
> int}' [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> cc1: all warnings being treated as errors
> rules.mak:69: recipe for target 'hw/arm/digic_boards.o' failed
> make: *** [hw/arm/digic_boards.o] Error 1
>    CC      hw/arm/musicpal.o
> hw/arm/musicpal.c: In function 'musicpal_init':
> hw/arm/musicpal.c:1598:22: error: format '%lli' expects argument of type 
> 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned int}' 
> [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> cc1: all warnings being treated as errors
> rules.mak:69: recipe for target 'hw/arm/musicpal.o' failed
> make: *** [hw/arm/musicpal.o] Error 1
>    CC      hw/arm/nseries.o
> hw/arm/nseries.c: In function 'n8x0_init':
> hw/arm/nseries.c:1316:22: error: format '%lli' expects argument of type 
> 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned int}' 
> [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> cc1: all warnings being treated as errors
> rules.mak:69: recipe for target 'hw/arm/nseries.o' failed
> make: *** [hw/arm/nseries.o] Error 1
>    CC      hw/arm/omap_sx1.o
> hw/arm/omap_sx1.c: In function 'sx1_init':
> hw/arm/omap_sx1.c:119:22: error: format '%lli' expects argument of type 
> 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned int}' 
> [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> cc1: all warnings being treated as errors
> rules.mak:69: recipe for target 'hw/arm/omap_sx1.o' failed
> make: *** [hw/arm/omap_sx1.o] Error 1
>    CC      hw/arm/palm.o
> hw/arm/palm.c: In function 'palmte_init':
> hw/arm/palm.c:202:22: error: format '%lli' expects argument of type 
> 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned int}' 
> [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> cc1: all warnings being treated as errors
> rules.mak:69: recipe for target 'hw/arm/palm.o' failed
> make: *** [hw/arm/palm.o] Error 1
>    CC      hw/arm/collie.o
> hw/arm/collie.c: In function 'collie_init':
> hw/arm/collie.c:32:22: error: format '%lli' expects argument of type 
> 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned int}' 
> [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> cc1: all warnings being treated as errors
> rules.mak:69: recipe for target 'hw/arm/collie.o' failed
> make: *** [hw/arm/collie.o] Error 1
>    CC      hw/arm/mps2.o
> hw/arm/mps2.c: In function 'mps2_common_init':
> hw/arm/mps2.c:121:22: error: format '%lli' expects argument of type 
> 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned int}' 
> [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> cc1: all warnings being treated as errors
> rules.mak:69: recipe for target 'hw/arm/mps2.o' failed
> make: *** [hw/arm/mps2.o] Error 1
>    CC      hw/arm/mps2-tz.o
> hw/arm/mps2-tz.c: In function 'mps2tz_common_init':
> hw/arm/mps2-tz.c:391:22: error: format '%lli' expects argument of type 
> 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned int}' 
> [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> cc1: all warnings being treated as errors
> rules.mak:69: recipe for target 'hw/arm/mps2-tz.o' failed
> make: *** [hw/arm/mps2-tz.o] Error 1
>    CC      hw/lm32/lm32_boards.o
> hw/lm32/lm32_boards.c: In function 'lm32_evr_init':
> hw/lm32/lm32_boards.c:89:22: error: format '%lli' expects argument of 
> type 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned 
> int}' [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> hw/lm32/lm32_boards.c: In function 'lm32_uclinux_init':
> hw/lm32/lm32_boards.c:179:22: error: format '%lli' expects argument of 
> type 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned 
> int}' [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> cc1: all warnings being treated as errors
> rules.mak:69: recipe for target 'hw/lm32/lm32_boards.o' failed
> make: *** [hw/lm32/lm32_boards.o] Error 1
>    CC      hw/lm32/milkymist.o
> hw/lm32/milkymist.c: In function 'milkymist_init':
> hw/lm32/milkymist.c:100:22: error: format '%lli' expects argument of 
> type 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned 
> int}' [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> cc1: all warnings being treated as errors
>    CC      hw/mips/mips_fulong2e.o
> hw/mips/mips_fulong2e.c: In function 'mips_fulong2e_init':
> hw/mips/mips_fulong2e.c:317:22: error: format '%ld' expects argument of 
> type 'long int', but argument 2 has type 'long long int' [-Werror=format=]
>           error_report("Invalid RAM size, should be %ld", 256 * MiB);
>                        ^
> cc1: all warnings being treated as errors
>    CC      hw/ppc/ppc405_boards.o
> hw/ppc/ppc405_boards.c: In function 'ref405ep_init':
> hw/ppc/ppc405_boards.c:165:22: error: format '%lli' expects argument of 
> type 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned 
> int}' [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> hw/ppc/ppc405_boards.c: In function 'taihu_405ep_init':
> hw/ppc/ppc405_boards.c:435:22: error: format '%lli' expects argument of 
> type 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned 
> int}' [-Werror=format=]
>           error_report("Invalid RAM size, should be %" PRIi64 " Bytes",
>                        ^
> cc1: all warnings being treated as errors
> rules.mak:69: recipe for target 'hw/ppc/ppc405_boards.o' failed
> make: *** [hw/ppc/ppc405_boards.o] Error 1
>    CC      hw/ppc/ppc4xx_devs.o
> hw/ppc/ppc4xx_devs.c: In function 'ppc4xx_sdram_adjust':
> hw/ppc/ppc4xx_devs.c:704:39: error: format '%lli' expects argument of 
> type 'long long int', but argument 3 has type 'ram_addr_t {aka const 
> unsigned int}' [-Werror=format=]
>               char *t = g_strdup_printf("%s%" PRIi64 "%s", s, 
> sdram_bank_sizes[i],
>                                         ^
> hw/ppc/ppc4xx_devs.c:709:22: error: format '%lli' expects argument of 
> type 'long long int', but argument 2 has type 'ram_addr_t {aka unsigned 
> int}' [-Werror=format=]
>           error_report("Invalid RAM size, unable to fit all RAM into RAM 
> banks"
>                        ^
> cc1: all warnings being treated as errors
> rules.mak:69: recipe for target 'hw/ppc/ppc4xx_devs.o' failed
> make: *** [hw/ppc/ppc4xx_devs.o] Error 1
>    CC      hw/ppc/e500.o
> hw/ppc/e500.c: In function 'ppce500_init':
> hw/ppc/e500.c:909:22: error: format '%ld' expects argument of type 'long 
> int', but argument 2 has type 'long long int' [-Werror=format=]
>           error_report("RAM size must be multiple of %ld", RAM_SIZES_ALIGN);
>                        ^
> cc1: all warnings being treated as errors
>