search for: config_pgste

...0002000000000000UL + #ifndef __s390x__ /* Bits in the segment table address-space-control-element */ @@ -513,6 +521,67 @@ static inline int pte_file(pte_t pte) #define __HAVE_ARCH_PTE_SAME #define pte_same(a,b) (pte_val(a) == pte_val(b)) +static inline void rcp_lock(pte_t *ptep) +{ +#ifdef CONFIG_PGSTE + atomic64_t *rcp = (atomic64_t *) (ptep + PTRS_PER_PTE); + preempt_disable(); + atomic64_set_mask(_PAGE_RCP_PCL, rcp); +#endif +} + +static inline void rcp_unlock(pte_t *ptep) +{ +#ifdef CONFIG_PGSTE + atomic64_t *rcp = (atomic64_t *) (ptep + PTRS_PER_PTE); + atomic64_clear_mask(_PAGE_RCP_PCL, rcp...

...in the page table: s390_enable_sie makes sure that the process is single threaded and then uses dup_mm to create a new mm with reorganized page tables. The old mm is freed and the process has now a page status extended field after every page table. Code that wants to exploit pgstes should SELECT CONFIG_PGSTE. This patch has a small common code hit, namely making dup_mm non-static. Signed-off-by: Martin Schwidefsky <schwidefsky at de.ibm.com> Signed-off-by: Carsten Otte <cotte at de.ibm.com> --- arch/s390/Kconfig | 4 ++ arch/s390/kernel/setup.c | 4 ++ arch/s39...

This patch series introduces a backend for kvm to run on IBM System z machines that uses the mainframe's sie virtualization capability. This work runs 64bit guests on z800/z890/z900/z990/z9/z10 class machines with a 64bit linux host. Userspace will follow once we're done brushing it over. The patch queue consists of the following patches, which can be applied in sequence on top of kvm.git

This patch series introduces a backend for kvm to run on IBM System z machines that uses the mainframe's sie virtualization capability. This work runs 64bit guests on z800/z890/z900/z990/z9/z10 class machines with a 64bit linux host. Userspace will follow once we're done brushing it over. The patch queue consists of the following patches, which can be applied in sequence on top of kvm.git