similar to: [PATCH AUTOSEL 4.14 35/37] x86/paravirt: Fix callee-saved function ELF sizes

From: Josh Poimboeuf <jpoimboe at redhat.com> [ Upstream commit 083db6764821996526970e42d09c1ab2f4155dd4 ] The __raw_callee_save_*() functions have an ELF symbol size of zero, which confuses objtool and other tools. Fixes a bunch of warnings like the following: arch/x86/xen/mmu_pv.o: warning: objtool: __raw_callee_save_xen_pte_val() is missing an ELF size annotation

From: Josh Poimboeuf <jpoimboe at redhat.com> [ Upstream commit 083db6764821996526970e42d09c1ab2f4155dd4 ] The __raw_callee_save_*() functions have an ELF symbol size of zero, which confuses objtool and other tools. Fixes a bunch of warnings like the following: arch/x86/xen/mmu_pv.o: warning: objtool: __raw_callee_save_xen_pte_val() is missing an ELF size annotation

> On Jul 3, 2019, at 7:04 AM, Juergen Gross <jgross at suse.com> wrote: > > On 03.07.19 01:51, Nadav Amit wrote: >> To improve TLB shootdown performance, flush the remote and local TLBs >> concurrently. Introduce flush_tlb_multi() that does so. Introduce >> paravirtual versions of flush_tlb_multi() for KVM, Xen and hyper-v (Xen >> and hyper-v are only

On x86 set_pte_at() is now always falling back to set_pte(). So instead of having this fallback after the paravirt maze just drop the set_pte_at paravirt operation and let set_pte_at() use the set_pte() function directly. Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/include/asm/paravirt.h | 8 +------- arch/x86/include/asm/paravirt_types.h | 2 --

On 24/02/18 00:25, Pavel Tatashin wrote: > Juergen Gross noticed that commit > f7f99100d8d ("mm: stop zeroing memory during allocation in vmemmap") > broke XEN PV domains when deferred struct page initialization is enabled. > > This is because the xen's PagePinned() flag is getting erased from struct > pages when they are initialized later in boot. > >

On 03/07/2019 18:02, Nadav Amit wrote: >> On Jul 3, 2019, at 7:04 AM, Juergen Gross <jgross at suse.com> wrote: >> >> On 03.07.19 01:51, Nadav Amit wrote: >>> To improve TLB shootdown performance, flush the remote and local TLBs >>> concurrently. Introduce flush_tlb_multi() that does so. Introduce >>> paravirtual versions of flush_tlb_multi() for

The two paravirt callbacks .mmu.activate_mm and .mmu.dup_mmap are sharing the same implementations in all cases: for Xen PV guests they are pinning the PGD of the new mm_struct, and for all other cases they are a NOP. In the end both callbacks are meant to register an address space with the underlying hypervisor, so there needs to be only a single callback for that purpose. So merge them to a

On 03.07.19 01:51, Nadav Amit wrote: > To improve TLB shootdown performance, flush the remote and local TLBs > concurrently. Introduce flush_tlb_multi() that does so. Introduce > paravirtual versions of flush_tlb_multi() for KVM, Xen and hyper-v (Xen > and hyper-v are only compile-tested). > > While the updated smp infrastructure is capable of running a function on > a single

On 03.07.19 01:51, Nadav Amit wrote: > To improve TLB shootdown performance, flush the remote and local TLBs > concurrently. Introduce flush_tlb_multi() that does so. Introduce > paravirtual versions of flush_tlb_multi() for KVM, Xen and hyper-v (Xen > and hyper-v are only compile-tested). > > While the updated smp infrastructure is capable of running a function on > a single

With removal of lguest some of the paravirt functions are no longer needed. Remove them. Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/include/asm/desc.h | 3 +-- arch/x86/include/asm/paravirt.h | 37 ----------------------------------- arch/x86/include/asm/paravirt_types.h | 9 --------- arch/x86/include/asm/pgtable.h | 27

With removal of lguest some of the paravirt functions are no longer needed. Remove them. Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/include/asm/desc.h | 3 +-- arch/x86/include/asm/paravirt.h | 37 ----------------------------------- arch/x86/include/asm/paravirt_types.h | 9 --------- arch/x86/include/asm/pgtable.h | 27

To improve TLB shootdown performance, flush the remote and local TLBs concurrently. Introduce flush_tlb_multi() that does so. The current flush_tlb_others() interface is kept, since paravirtual interfaces need to be adapted first before it can be removed. This is left for future work. In such PV environments, TLB flushes are not performed, at this time, concurrently. Add a static key to tell

To improve TLB shootdown performance, flush the remote and local TLBs concurrently. Introduce flush_tlb_multi() that does so. The current flush_tlb_others() interface is kept, since paravirtual interfaces need to be adapted first before it can be removed. This is left for future work. In such PV environments, TLB flushes are not performed, at this time, concurrently. Add a static key to tell

To improve TLB shootdown performance, flush the remote and local TLBs concurrently. Introduce flush_tlb_multi() that does so. Introduce paravirtual versions of flush_tlb_multi() for KVM, Xen and hyper-v (Xen and hyper-v are only compile-tested). While the updated smp infrastructure is capable of running a function on a single local core, it is not optimized for this case. The multiple function

To improve TLB shootdown performance, flush the remote and local TLBs concurrently. Introduce flush_tlb_multi() that does so. The current flush_tlb_others() interface is kept, since paravirtual interfaces need to be adapted first before it can be removed. This is left for future work. In such PV environments, TLB flushes are not performed, at this time, concurrently. Add a static key to tell

To improve TLB shootdown performance, flush the remote and local TLBs concurrently. Introduce flush_tlb_multi() that does so. The current flush_tlb_others() interface is kept, since paravirtual interfaces need to be adapted first before it can be removed. This is left for future work. In such PV environments, TLB flushes are not performed, at this time, concurrently. Add a static key to tell

To improve TLB shootdown performance, flush the remote and local TLBs concurrently. Introduce flush_tlb_multi() that does so. Introduce paravirtual versions of flush_tlb_multi() for KVM, Xen and hyper-v (Xen and hyper-v are only compile-tested). While the updated smp infrastructure is capable of running a function on a single local core, it is not optimized for this case. The multiple function

There is no need to include pv-guest only object files in a kernel not configured to support those. Move Xen's irq.o, xen-asm*.o and pv parts of entry_*.o into CONFIG_XEN_PV sections. Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/entry/entry_32.S | 4 +++- arch/x86/entry/entry_64.S | 6 ++++-- arch/x86/xen/Makefile | 8 ++++---- 3 files changed, 11 insertions(+), 7

On Thu, Aug 29, 2019 at 12:55 PM Thomas Garnier <thgarnie at chromium.org> wrote: > > On Tue, Aug 6, 2019 at 8:51 AM Peter Zijlstra <peterz at infradead.org> wrote: > > > > On Tue, Aug 06, 2019 at 05:43:47PM +0200, Borislav Petkov wrote: > > > On Tue, Jul 30, 2019 at 12:12:44PM -0700, Thomas Garnier wrote: > > > > These patches make some of the

On Mon, Mar 02, 2020 at 09:02:15PM -0800, Kees Cook wrote: > On Thu, Feb 27, 2020 at 04:00:45PM -0800, Thomas Garnier wrote: > > Minor changes based on feedback and rebase from v10. > > > > Splitting the previous serie in two. This part contains assembly code > > changes required for PIE but without any direct dependencies with the > > rest of the patchset. >