From f5ec6723269d9652ce42927cc03485061d663b23 Mon Sep 17 00:00:00 2001 From: Roger Pau Monne Date: Mon, 27 Jul 2020 11:13:41 +0200 Subject: Revert "xen/balloon: Fix crash when ballooning on x86 32 bit PAE" MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This reverts commit dfd74a1edfaba5864276a2859190a8d242d18952. This has been fixed by commit dca4436d1cf9e0d237c which added the out of bounds check to __add_memory, so that trying to add blocks past MAX_PHYSMEM_BITS will fail. Note the check in the Xen balloon driver was bogus anyway, as it checked the start address of the resource, but it should instead test the end address to assert the whole resource falls below MAX_PHYSMEM_BITS. Signed-off-by: Roger Pau Monné Reviewed-by: Juergen Gross Link: https://lore.kernel.org/r/20200727091342.52325-4-roger.pau@citrix.com Signed-off-by: Juergen Gross --- drivers/xen/balloon.c | 14 -------------- 1 file changed, 14 deletions(-) (limited to 'drivers/xen/balloon.c') diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 292413b27575..b1d8b028bf80 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -266,20 +266,6 @@ static struct resource *additional_memory_resource(phys_addr_t size) return NULL; } -#ifdef CONFIG_SPARSEMEM - { - unsigned long limit = 1UL << (MAX_PHYSMEM_BITS - PAGE_SHIFT); - unsigned long pfn = res->start >> PAGE_SHIFT; - - if (pfn > limit) { - pr_err("New System RAM resource outside addressable RAM (%lu > %lu)\n", - pfn, limit); - release_memory_resource(res); - return NULL; - } - } -#endif - return res; } -- cgit v1.2.3