search for: dup_mmap

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 f...

On 07.02.23 22:09, Srivatsa S. Bhat wrote: > On 2/6/23 11:59 PM, Juergen Gross wrote: >> 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 hype...

...irt_ops paravirt_ops = { #endif }, - .pv_misc_ops = { - .set_lazy_mode = paravirt_nop, - }, - .pv_mmu_ops = { .pagetable_setup_start = native_pagetable_setup_start, .pagetable_setup_done = native_pagetable_setup_done, @@ -400,6 +444,11 @@ struct paravirt_ops paravirt_ops = { .dup_mmap = paravirt_nop, .exit_mmap = paravirt_nop, .activate_mm = paravirt_nop, + + .lazy_mode = { + .enter = paravirt_nop, + .leave = paravirt_nop, + }, }, }; @@ -417,7 +466,6 @@ static void __init __used pv_aliases(voi substructure(pv_info); substructure(pv_init_ops); - subs...

...irt_ops paravirt_ops = { #endif }, - .pv_misc_ops = { - .set_lazy_mode = paravirt_nop, - }, - .pv_mmu_ops = { .pagetable_setup_start = native_pagetable_setup_start, .pagetable_setup_done = native_pagetable_setup_done, @@ -400,6 +444,11 @@ struct paravirt_ops paravirt_ops = { .dup_mmap = paravirt_nop, .exit_mmap = paravirt_nop, .activate_mm = paravirt_nop, + + .lazy_mode = { + .enter = paravirt_nop, + .leave = paravirt_nop, + }, }, }; @@ -417,7 +466,6 @@ static void __init __used pv_aliases(voi substructure(pv_info); substructure(pv_init_ops); - subs...

...= native_pmd_clear, + + .pmd_val = native_pmd_val, + .make_pmd = native_make_pmd, #endif - .pte_val = native_pte_val, - .pgd_val = native_pgd_val, - - .make_pte = native_make_pte, - .make_pgd = native_make_pgd, - - .irq_enable_sysexit = native_irq_enable_sysexit, - .iret = native_iret, - - .dup_mmap = paravirt_nop, - .exit_mmap = paravirt_nop, - .activate_mm = paravirt_nop, + .pte_val = native_pte_val, + .pgd_val = native_pgd_val, + + .make_pte = native_make_pte, + .make_pgd = native_make_pgd, + + .dup_mmap = paravirt_nop, + .exit_mmap = paravirt_nop, + .activate_mm = paravirt_no...

...= native_pmd_clear, + + .pmd_val = native_pmd_val, + .make_pmd = native_make_pmd, #endif - .pte_val = native_pte_val, - .pgd_val = native_pgd_val, - - .make_pte = native_make_pte, - .make_pgd = native_make_pgd, - - .irq_enable_sysexit = native_irq_enable_sysexit, - .iret = native_iret, - - .dup_mmap = paravirt_nop, - .exit_mmap = paravirt_nop, - .activate_mm = paravirt_nop, + .pte_val = native_pte_val, + .pgd_val = native_pgd_val, + + .make_pte = native_make_pte, + .make_pgd = native_make_pgd, + + .dup_mmap = paravirt_nop, + .exit_mmap = paravirt_nop, + .activate_mm = paravirt_no...

...= native_pmd_clear, + + .pmd_val = native_pmd_val, + .make_pmd = native_make_pmd, #endif - .pte_val = native_pte_val, - .pgd_val = native_pgd_val, - - .make_pte = native_make_pte, - .make_pgd = native_make_pgd, - - .irq_enable_sysexit = native_irq_enable_sysexit, - .iret = native_iret, - - .dup_mmap = paravirt_nop, - .exit_mmap = paravirt_nop, - .activate_mm = paravirt_nop, + .pte_val = native_pte_val, + .pgd_val = native_pgd_val, + + .make_pte = native_make_pte, + .make_pgd = native_make_pgd, + + .dup_mmap = paravirt_nop, + .exit_mmap = paravirt_nop, + .activate_mm = paravirt_no...

...= native_pmd_clear, + + .pmd_val = native_pmd_val, + .make_pmd = native_make_pmd, #endif - .pte_val = native_pte_val, - .pgd_val = native_pgd_val, - - .make_pte = native_make_pte, - .make_pgd = native_make_pgd, - - .irq_enable_sysexit = native_irq_enable_sysexit, - .iret = native_iret, - - .dup_mmap = paravirt_nop, - .exit_mmap = paravirt_nop, - .activate_mm = paravirt_nop, + .pte_val = native_pte_val, + .pgd_val = native_pgd_val, + + .make_pte = native_make_pte, + .make_pgd = native_make_pgd, + + .dup_mmap = paravirt_nop, + .exit_mmap = paravirt_nop, + .activate_mm = paravirt_no...

...= native_pmd_clear, + + .pmd_val = native_pmd_val, + .make_pmd = native_make_pmd, #endif - .pte_val = native_pte_val, - .pgd_val = native_pgd_val, - - .make_pte = native_make_pte, - .make_pgd = native_make_pgd, - - .irq_enable_sysexit = native_irq_enable_sysexit, - .iret = native_iret, - - .dup_mmap = paravirt_nop, - .exit_mmap = paravirt_nop, - .activate_mm = paravirt_nop, + .pte_val = native_pte_val, + .pgd_val = native_pgd_val, + + .make_pte = native_make_pte, + .make_pgd = native_make_pgd, + + .dup_mmap = paravirt_nop, + .exit_mmap = paravirt_nop, + .activate_mm = paravirt_no...

...= native_pmd_clear, + + .pmd_val = native_pmd_val, + .make_pmd = native_make_pmd, #endif - .pte_val = native_pte_val, - .pgd_val = native_pgd_val, - - .make_pte = native_make_pte, - .make_pgd = native_make_pgd, - - .irq_enable_sysexit = native_irq_enable_sysexit, - .iret = native_iret, - - .dup_mmap = paravirt_nop, - .exit_mmap = paravirt_nop, - .activate_mm = paravirt_nop, + .pte_val = native_pte_val, + .pgd_val = native_pgd_val, + + .make_pte = native_make_pte, + .make_pgd = native_make_pgd, + + .dup_mmap = paravirt_nop, + .exit_mmap = paravirt_nop, + .activate_mm = paravirt_no...

From: Martin Schwidefsky <schwidefsky at de.ibm.com> The SIE instruction on s390 uses the 2nd half of the page table page to virtualize the storage keys of a guest. This patch offers the s390_enable_sie function, which reorganizes the page tables of a single-threaded process to reserve space in the page table: s390_enable_sie makes sure that the process is single threaded and then uses

...irt_ops paravirt_ops = { #endif }, - .pv_misc_ops = { - .set_lazy_mode = paravirt_nop, - }, - .pv_mmu_ops = { .pagetable_setup_start = native_pagetable_setup_start, .pagetable_setup_done = native_pagetable_setup_done, @@ -400,6 +464,11 @@ struct paravirt_ops paravirt_ops = { .dup_mmap = paravirt_nop, .exit_mmap = paravirt_nop, .activate_mm = paravirt_nop, + + .lazy_mode = { + .enter = paravirt_nop, + .leave = paravirt_nop, + }, }, }; @@ -417,7 +486,6 @@ static void __init __used pv_aliases(voi substructure(pv_info); substructure(pv_init_ops); - subs...

...irt_ops paravirt_ops = { #endif }, - .pv_misc_ops = { - .set_lazy_mode = paravirt_nop, - }, - .pv_mmu_ops = { .pagetable_setup_start = native_pagetable_setup_start, .pagetable_setup_done = native_pagetable_setup_done, @@ -400,6 +464,11 @@ struct paravirt_ops paravirt_ops = { .dup_mmap = paravirt_nop, .exit_mmap = paravirt_nop, .activate_mm = paravirt_nop, + + .lazy_mode = { + .enter = paravirt_nop, + .leave = paravirt_nop, + }, }, }; @@ -417,7 +486,6 @@ static void __init __used pv_aliases(voi substructure(pv_info); substructure(pv_init_ops); - subs...

...l, + .pud_val = native_pud_val, + .pmd_val = native_pmd_val, + .pgd_val = native_pgd_val, + + .make_pte = native_make_pte, + .make_pmd = native_make_pmd, + .make_pud = native_make_pud, + .make_pgd = native_make_pgd, + + .swapgs = native_swapgs, + .sysret = native_sysret, + .iret = native_iret, + + .dup_mmap = (void *)native_nop, + .exit_mmap = (void *)native_nop, + .activate_mm = (void *)native_nop, + + .startup_ipi_hook = (void *)native_nop, +}; + +EXPORT_SYMBOL(paravirt_ops); Index: clean-start/include/asm-x86_64/paravirt.h =================================================================== --- /dev...

...l, + .pud_val = native_pud_val, + .pmd_val = native_pmd_val, + .pgd_val = native_pgd_val, + + .make_pte = native_make_pte, + .make_pmd = native_make_pmd, + .make_pud = native_make_pud, + .make_pgd = native_make_pgd, + + .swapgs = native_swapgs, + .sysret = native_sysret, + .iret = native_iret, + + .dup_mmap = (void *)native_nop, + .exit_mmap = (void *)native_nop, + .activate_mm = (void *)native_nop, + + .startup_ipi_hook = (void *)native_nop, +}; + +EXPORT_SYMBOL(paravirt_ops); Index: clean-start/include/asm-x86_64/paravirt.h =================================================================== --- /dev...

Hi Linus, Here's a set of patches to update paravirt_ops and Xen for 2.6.24 A quick overview of the patchset: paravirt_ops: Remove the monolithic paravirt_ops structure, and replace it with smaller structures of related functions. Also, clean up the handling of lazy mode to make it easier to implement. x86/mm/init.c: remove a chunk of dead code Xen: - remove duplicate includes -

Hi Linus, Here's a set of patches to update paravirt_ops and Xen for 2.6.24 A quick overview of the patchset: paravirt_ops: Remove the monolithic paravirt_ops structure, and replace it with smaller structures of related functions. Also, clean up the handling of lazy mode to make it easier to implement. x86/mm/init.c: remove a chunk of dead code Xen: - remove duplicate includes -

Hi Linus, Here's a set of patches to update paravirt_ops and Xen for 2.6.24 A quick overview of the patchset: paravirt_ops: Remove the monolithic paravirt_ops structure, and replace it with smaller structures of related functions. Also, clean up the handling of lazy mode to make it easier to implement. x86/mm/init.c: remove a chunk of dead code Xen: - remove duplicate includes -

This series removes some no longer needed stuff from paravirt infrastructure and puts large quantities of paravirt ops under a new config option PARAVIRT_XXL which is selected by XEN_PV only. A pvops kernel without XEN_PV being configured is about 2.5% smaller with this series applied. tip commit 5800dc5c19f34e6e03b5adab1282535cb102fafd ("x86/paravirt: Fix spectre-v2 mitigations for

...= 4 */ #endif /* CONFIG_PGTABLE_LEVELS >= 3 */ - .pte_val = PTE_IDENT, - .pgd_val = PTE_IDENT, + .pv_mmu_ops.pte_val = PTE_IDENT, + .pv_mmu_ops.pgd_val = PTE_IDENT, - .make_pte = PTE_IDENT, - .make_pgd = PTE_IDENT, + .pv_mmu_ops.make_pte = PTE_IDENT, + .pv_mmu_ops.make_pgd = PTE_IDENT, - .dup_mmap = paravirt_nop, - .exit_mmap = paravirt_nop, - .activate_mm = paravirt_nop, + .pv_mmu_ops.dup_mmap = paravirt_nop, + .pv_mmu_ops.exit_mmap = paravirt_nop, + .pv_mmu_ops.activate_mm = paravirt_nop, - .lazy_mode = { + .pv_mmu_ops.lazy_mode = { .enter = paravirt_nop, .leave = paravirt_nop,...