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This series contain fixes to make the paravirt_ops code compile and boot on x86_64. This is a follow-up for the previous series from Glauber.

This series contain fixes to make the paravirt_ops code compile and boot on x86_64. This is a follow-up for the previous series from Glauber.

...- void (*pmd_clear)(pmd_t *pmdp); - -#endif /* CONFIG_X86_PAE */ - void (*set_pud)(pud_t *pudp, pud_t pudval); struct paravirt_callee_save pmd_val; struct paravirt_callee_save make_pmd; -#if CONFIG_PGTABLE_LEVELS >= 4 struct paravirt_callee_save pud_val; struct paravirt_callee_save make_pud; @@ -291,10 +274,6 @@ struct pv_mmu_ops { void (*set_pgd)(pgd_t *pgdp, pgd_t pgdval); #endif /* CONFIG_PGTABLE_LEVELS >= 5 */ -#endif /* CONFIG_PGTABLE_LEVELS >= 4 */ - -#endif /* CONFIG_PGTABLE_LEVELS >= 3 */ - struct pv_lazy_ops lazy_mode; /* dom0 ops */ diff --git a/arch/x8...

...- void (*pmd_clear)(pmd_t *pmdp); - -#endif /* CONFIG_X86_PAE */ - void (*set_pud)(pud_t *pudp, pud_t pudval); struct paravirt_callee_save pmd_val; struct paravirt_callee_save make_pmd; -#if CONFIG_PGTABLE_LEVELS >= 4 struct paravirt_callee_save pud_val; struct paravirt_callee_save make_pud; @@ -291,10 +274,6 @@ struct pv_mmu_ops { void (*set_pgd)(pgd_t *pgdp, pgd_t pgdval); #endif /* CONFIG_PGTABLE_LEVELS >= 5 */ -#endif /* CONFIG_PGTABLE_LEVELS >= 4 */ - -#endif /* CONFIG_PGTABLE_LEVELS >= 3 */ - struct pv_lazy_ops lazy_mode; /* dom0 ops */ diff --git a/arch/x8...

...e problem because this does not happen often. + */ +static void native_flush_tlb_all(void) +{ + __native_flush_tlb_all(); +} + +static void native_flush_tlb_one(u64 addr) +{ + __native_flush_tlb_one(addr); +} + +pte_t native_make_pte(unsigned long pte) +{ + return (pte_t){ pte }; +} + +pud_t native_make_pud(unsigned long pud) +{ + return (pud_t){ pud }; +} + +pmd_t native_make_pmd(unsigned long pmd) +{ + return (pmd_t){ pmd }; +} + +pgd_t native_make_pgd(unsigned long pgd) +{ + return (pgd_t){ pgd }; +} + +pte_t native_ptep_get_and_clear(struct mm_struct *mm, u64 addr, + pte_t *ptep) +{ + return...

...e problem because this does not happen often. + */ +static void native_flush_tlb_all(void) +{ + __native_flush_tlb_all(); +} + +static void native_flush_tlb_one(u64 addr) +{ + __native_flush_tlb_one(addr); +} + +pte_t native_make_pte(unsigned long pte) +{ + return (pte_t){ pte }; +} + +pud_t native_make_pud(unsigned long pud) +{ + return (pud_t){ pud }; +} + +pmd_t native_make_pmd(unsigned long pmd) +{ + return (pmd_t){ pmd }; +} + +pgd_t native_make_pgd(unsigned long pgd) +{ + return (pgd_t){ pgd }; +} + +pte_t native_ptep_get_and_clear(struct mm_struct *mm, u64 addr, + pte_t *ptep) +{ + return...

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

The long term plan has been to replace Xen PV guests by PVH. The first victim of that plan are now 32-bit PV guests, as those are used only rather seldom these days. Xen on x86 requires 64-bit support and with Grub2 now supporting PVH officially since version 2.04 there is no need to keep 32-bit PV guest support alive in the Linux kernel. Additionally Meltdown mitigation is not available in the

The long term plan has been to replace Xen PV guests by PVH. The first victim of that plan are now 32-bit PV guests, as those are used only rather seldom these days. Xen on x86 requires 64-bit support and with Grub2 now supporting PVH officially since version 2.04 there is no need to keep 32-bit PV guest support alive in the Linux kernel. Additionally Meltdown mitigation is not available in the

The long term plan has been to replace Xen PV guests by PVH. The first victim of that plan are now 32-bit PV guests, as those are used only rather seldom these days. Xen on x86 requires 64-bit support and with Grub2 now supporting PVH officially since version 2.04 there is no need to keep 32-bit PV guest support alive in the Linux kernel. Additionally Meltdown mitigation is not available in the

The long term plan has been to replace Xen PV guests by PVH. The first victim of that plan are now 32-bit PV guests, as those are used only rather seldom these days. Xen on x86 requires 64-bit support and with Grub2 now supporting PVH officially since version 2.04 there is no need to keep 32-bit PV guest support alive in the Linux kernel. Additionally Meltdown mitigation is not available in the

The long term plan has been to replace Xen PV guests by PVH. The first victim of that plan are now 32-bit PV guests, as those are used only rather seldom these days. Xen on x86 requires 64-bit support and with Grub2 now supporting PVH officially since version 2.04 there is no need to keep 32-bit PV guest support alive in the Linux kernel. Additionally Meltdown mitigation is not available in the

...mu_ops.pmd_clear = native_pmd_clear, #endif - .set_pud = native_set_pud, + .pv_mmu_ops.set_pud = native_set_pud, - .pmd_val = PTE_IDENT, - .make_pmd = PTE_IDENT, + .pv_mmu_ops.pmd_val = PTE_IDENT, + .pv_mmu_ops.make_pmd = PTE_IDENT, #if CONFIG_PGTABLE_LEVELS >= 4 - .pud_val = PTE_IDENT, - .make_pud = PTE_IDENT, + .pv_mmu_ops.pud_val = PTE_IDENT, + .pv_mmu_ops.make_pud = PTE_IDENT, - .set_p4d = native_set_p4d, + .pv_mmu_ops.set_p4d = native_set_p4d, #if CONFIG_PGTABLE_LEVELS >= 5 - .p4d_val = PTE_IDENT, - .make_p4d = PTE_IDENT, + .pv_mmu_ops.p4d_val = PTE_IDENT, + .pv_mmu_ops.make_p4d...

A lot of cleanup after removal of 32-bit Xen PV guest support in paravirt code. Changes in V4: - dropped patches 1-3, as already committed - addressed comments to V3 - added new patches 5+6 Changes in V3: - addressed comments to V2 - split patch 1 into 2 patches - new patches 3 and 7 Changes in V2: - rebase to 5.8 kernel - addressed comments to V1 - new patches 3 and 4 Juergen Gross (6):

Today paravirtualization is a all-or-nothing game: either a kernel is compiled with no paravirtualization support at all, or it is supporting paravirtualized environments like Xen pv-guests or lguest additionally to some paravirtualized tuning for KVM, Hyperv, VMWare or Xen HVM-guests. As support of pv-guests requires quite intrusive pv-hooks (e.g. all access functions to page table entries,

Today paravirtualization is a all-or-nothing game: either a kernel is compiled with no paravirtualization support at all, or it is supporting paravirtualized environments like Xen pv-guests or lguest additionally to some paravirtualized tuning for KVM, Hyperv, VMWare or Xen HVM-guests. As support of pv-guests requires quite intrusive pv-hooks (e.g. all access functions to page table entries,

...e problem because this does not happen often. + */ +static void native_flush_tlb_all(void) +{ + __native_flush_tlb_all(); +} + +static void native_flush_tlb_one(u64 addr) +{ + __native_flush_tlb_one(addr); +} + +pte_t native_make_pte(unsigned long pte) +{ + return (pte_t){ pte }; +} + +pud_t native_make_pud(unsigned long pud) +{ + return (pud_t){ pud }; +} + +pmd_t native_make_pmd(unsigned long pmd) +{ + return (pmd_t){ pmd }; +} + +pgd_t native_make_pgd(unsigned long pgd) +{ + return (pgd_t){ pgd }; +} + +pte_t native_ptep_get_and_clear(struct mm_struct *mm, u64 addr, + pte_t *ptep) +{ + return...

...e problem because this does not happen often. + */ +static void native_flush_tlb_all(void) +{ + __native_flush_tlb_all(); +} + +static void native_flush_tlb_one(u64 addr) +{ + __native_flush_tlb_one(addr); +} + +pte_t native_make_pte(unsigned long pte) +{ + return (pte_t){ pte }; +} + +pud_t native_make_pud(unsigned long pud) +{ + return (pud_t){ pud }; +} + +pmd_t native_make_pmd(unsigned long pmd) +{ + return (pmd_t){ pmd }; +} + +pgd_t native_make_pgd(unsigned long pgd) +{ + return (pgd_t){ pgd }; +} + +pte_t native_ptep_get_and_clear(struct mm_struct *mm, u64 addr, + pte_t *ptep) +{ + return...

...virt_ops = { .read_msr = native_read_msr, .write_msr = native_write_msr, .read_tsc = native_read_tsc, + .read_tscp = native_read_tscp, .read_pmc = native_read_pmc, .load_tr_desc = native_load_tr_desc, .set_ldt = native_set_ldt, @@ -571,7 +589,7 @@ struct paravirt_ops paravirt_ops = { .make_pud = native_make_pud, .make_pgd = native_make_pgd, - .irq_enable_sysexit = native_irq_enable_sysexit, + .sysret = native_sysret, .iret = native_iret, .dup_mmap = (void *)native_nop, @@ -580,4 +598,5 @@ struct paravirt_ops paravirt_ops = { .startup_ipi_hook = (void *)native_nop, }; + EX...

...virt_ops = { .read_msr = native_read_msr, .write_msr = native_write_msr, .read_tsc = native_read_tsc, + .read_tscp = native_read_tscp, .read_pmc = native_read_pmc, .load_tr_desc = native_load_tr_desc, .set_ldt = native_set_ldt, @@ -571,7 +589,7 @@ struct paravirt_ops paravirt_ops = { .make_pud = native_make_pud, .make_pgd = native_make_pgd, - .irq_enable_sysexit = native_irq_enable_sysexit, + .sysret = native_sysret, .iret = native_iret, .dup_mmap = (void *)native_nop, @@ -580,4 +598,5 @@ struct paravirt_ops paravirt_ops = { .startup_ipi_hook = (void *)native_nop, }; + EX...