search for: set_fixaddr_top

Rusty Russell wrote: > Chris: [RFC PATCH 12/33] Change __FIXADDR_TOP to leave room for the hypervisor. > - Replace with dynamic (Geerd) patch, put in paravirt_ops structure. > I'm looking at this, and I'm not sure that there needs to be a void (*set_fixmap_top)(unsigned long top) entry in paravirt ops. It seems to me that the hypervisor's init code can call the

...TOP); + void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags) { unsigned long address = __fix_to_virt(idx); @@ -147,6 +152,13 @@ void __set_fixmap (enum fixed_addresses return; } set_pte_pfn(address, phys >> PAGE_SHIFT, flags); + nr_fixmaps++; +} + +void set_fixaddr_top(unsigned long top) +{ + BUG_ON(nr_fixmaps > 0); + __FIXADDR_TOP = top - PAGE_SIZE; } pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .23560-linux-2.6.17-rc4-git3/fs/proc/t...

...TOP); + void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags) { unsigned long address = __fix_to_virt(idx); @@ -147,6 +152,13 @@ void __set_fixmap (enum fixed_addresses return; } set_pte_pfn(address, phys >> PAGE_SHIFT, flags); + nr_fixmaps++; +} + +void set_fixaddr_top(unsigned long top) +{ + BUG_ON(nr_fixmaps > 0); + __FIXADDR_TOP = top - PAGE_SIZE; } pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .23560-linux-2.6.17-rc4-git3/fs/proc/t...

...TOP); + void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags) { unsigned long address = __fix_to_virt(idx); @@ -147,6 +152,13 @@ void __set_fixmap (enum fixed_addresses return; } set_pte_pfn(address, phys >> PAGE_SHIFT, flags); + nr_fixmaps++; +} + +void set_fixaddr_top(unsigned long top) +{ + BUG_ON(nr_fixmaps > 0); + __FIXADDR_TOP = top - PAGE_SIZE; } pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.17-rc4/include/asm-i386/a.ou...

...TOP); + void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags) { unsigned long address = __fix_to_virt(idx); @@ -147,6 +152,13 @@ void __set_fixmap (enum fixed_addresses return; } set_pte_pfn(address, phys >> PAGE_SHIFT, flags); + nr_fixmaps++; +} + +void set_fixaddr_top(unsigned long top) +{ + BUG_ON(nr_fixmaps > 0); + __FIXADDR_TOP = top - PAGE_SIZE; } pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.17-rc4/include/asm-i386/a.ou...

[ REPOST: Apologies to anyone who has seen this before. It didn't make it onto any of the lists it should have. -J ] Hi Andrew, This series of patches lays the basic ground work for the paravirtualized kernel patches coming later on. I think this lot is ready for the rough-and-tumble world of the -mm tree. For the most part, these patches do nothing or very little. The patches should

[ REPOST: Apologies to anyone who has seen this before. It didn't make it onto any of the lists it should have. -J ] Hi Andrew, This series of patches lays the basic ground work for the paravirtualized kernel patches coming later on. I think this lot is ready for the rough-and-tumble world of the -mm tree. For the most part, these patches do nothing or very little. The patches should

...plement an initial set of Xen paravirt ops, as well as adapting head.S to set up a Xen-specific entrypoint. The head.S code does absolutely minimal setup, and then calls xen_start_kernel(). This installs the Xen paravirt ops, does some CPUID setup which would normally be done in head.S, calls set_fixaddr_top(), and then calls the normal start_kernel(). These patches compile, but are completely untested (though I recently booted it native on qemu, so it isn't completely broken). The Xen entrypoints are very incomplete; so far I've only done the trivial ones, including the ones which end up...