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xen_arm: Initialize RAM and add hi/low memory regions

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In order to use virtio backends we need to initialize RAM for the
xen-mapcache (which is responsible for mapping guest memory using foreign
mapping) to work. Calculate and add hi/low memory regions based on
machine->ram_size.

Use the constants defined in public header arch-arm.h to be aligned with the xen
toolstack.

While using this machine, the toolstack should then pass real ram_size using
"-m" arg. If "-m" is not given, create a QEMU machine without IOREQ and other
emulated devices like TPM and VIRTIO. This is done to keep this QEMU machine
usable for /etc/init.d/xencommons.

Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Signed-off-by: Vikram Garhwal <vikram.garhwal@amd.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Stefano Stabellini <stefano.stabellini@amd.com>
This commit is contained in:
Oleksandr Tyshchenko 2023-08-29 21:35:18 -07:00 • committed by Stefano Stabellini
parent 0c8ab1cddd
commit 560142190b
2 changed files with 53 additions and 0 deletions
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8
include/hw/xen/xen_native.h
View file

@ -539,4 +539,12 @@ static inline int xendevicemodel_set_irq_level(xendevicemodel_handle *dmod,
#define GUEST_VIRTIO_MMIO_SPI_LAST 43
#endif
#if defined(__i386__) || defined(__x86_64__)
#define GUEST_RAM_BANKS 2
#define GUEST_RAM0_BASE 0x40000000ULL /* 3GB of low RAM @ 1GB */
#define GUEST_RAM0_SIZE 0xc0000000ULL
#define GUEST_RAM1_BASE 0x0200000000ULL /* 1016GB of RAM @ 8GB */
#define GUEST_RAM1_SIZE 0xfe00000000ULL
#endif
#endif /* QEMU_HW_XEN_NATIVE_H */