From be38f2a0ff94c1c60e51b9d82fdf8d4b038a6c7d Mon Sep 17 00:00:00 2001 From: Chunyan Liu Date: Fri, 29 Apr 2016 11:17:08 +0800 Subject: [PATCH] fix xen hvm direct kernel boot Since commit a1666142: acpi-build: make ROMs RAM blocks resizeable, xen HVM direct kernel boot failed. Xen HVM direct kernel boot will insert a linuxboot.bin or multiboot.bin to /genroms, before this commit, in acpi_setup, for rom linuxboot.bin/multiboot.bin, it only needs 0x20000 size; after the commit, it will reserve x16 size for resize, that is 0x200000 size. It causes xen_ram_alloc failed due to running out of memory. To resolve it, either: 1. keep using original rom size instead of max size, don't reserve x16 size. 2. guest maxmem needs to be increased. (commit c1d322e6 "xen-hvm: increase maxmem before calling xc_domain_populate_physmap" solved the problem for a time, by accident. But then it is reverted in commit ffffbb369 due to other problem.) For 2, more discussion is needed about howto. So this patch tries 1, to use unresizable rom size in xen case in rom_set_mr. [CYL: BSC#970791] Signed-off-by: Chunyan Liu --- hw/core/loader.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/hw/core/loader.c b/hw/core/loader.c index 45742494e6..306b3ed683 100644 --- a/hw/core/loader.c +++ b/hw/core/loader.c @@ -55,6 +55,7 @@ #include "exec/address-spaces.h" #include "hw/boards.h" #include "qemu/cutils.h" +#include "hw/xen/xen.h" #include @@ -858,7 +859,10 @@ static void *rom_set_mr(Rom *rom, Object *owner, const char *name) void *data; rom->mr = g_malloc(sizeof(*rom->mr)); - memory_region_init_resizeable_ram(rom->mr, owner, name, + if (xen_enabled()) + memory_region_init_ram(rom->mr, owner, name, rom->datasize, &error_fatal); + else + memory_region_init_resizeable_ram(rom->mr, owner, name, rom->datasize, rom->romsize, fw_cfg_resized, &error_fatal);