search for: __start_parainstructions

...t;drivers/ide/pci/atiixp:FFFF05", none of these > warnings is present in Linus' tree. yes, lots of new section mismatch warnings. A large number of them are due to the paravirt patches: WARNING: vmlinux - Section mismatch: reference to .init.text: from .parainstructions between '__start_parainstructions' (at offset 0xc0458470) and '__stop_parainstructions' WARNING: vmlinux - Section mismatch: reference to .init.text: from .parainstructions between '__start_parainstructions' (at offset 0xc0458478) and '__stop_parainstructions' WARNING: vmlinux - Section mismatch: referen...

...t;drivers/ide/pci/atiixp:FFFF05", none of these > warnings is present in Linus' tree. yes, lots of new section mismatch warnings. A large number of them are due to the paravirt patches: WARNING: vmlinux - Section mismatch: reference to .init.text: from .parainstructions between '__start_parainstructions' (at offset 0xc0458470) and '__stop_parainstructions' WARNING: vmlinux - Section mismatch: reference to .init.text: from .parainstructions between '__start_parainstructions' (at offset 0xc0458478) and '__stop_parainstructions' WARNING: vmlinux - Section mismatch: referen...

Hi Andi, Here's a little batch of cleanups: - re-enable VDSO when PARAVIRT is enabled - make the parainstructions symbols match the other altinstructions naming convention - add kernel command-line options to disable altinstructions for smp and pv_ops Oh, and I'm mailing your noreplacement patch back at you, for no particularly good reason. J --

Hi Andi, Here's a little batch of cleanups: - re-enable VDSO when PARAVIRT is enabled - make the parainstructions symbols match the other altinstructions naming convention - add kernel command-line options to disable altinstructions for smp and pv_ops Oh, and I'm mailing your noreplacement patch back at you, for no particularly good reason. J --

...IG_PARAVIRT. CC arch/i386/kernel/alternative.o arch/i386/kernel/alternative.c:436: error: ?apply_paravirt? undeclared here (not in a function) arch/i386/kernel/alternative.c:436: warning: type defaults to ?int? in declaration of ?apply_paravirt? arch/i386/kernel/alternative.c:437: error: ?__start_parainstructions? undeclared here (not in a function) arch/i386/kernel/alternative.c:437: warning: type defaults to ?int? in declaration of ?__start_parainstructions? arch/i386/kernel/alternative.c:438: error: ?__stop_parainstructions? undeclared here (not in a function) arch/i386/kernel/alternative.c:438: warni...

...IG_PARAVIRT. CC arch/i386/kernel/alternative.o arch/i386/kernel/alternative.c:436: error: ?apply_paravirt? undeclared here (not in a function) arch/i386/kernel/alternative.c:436: warning: type defaults to ?int? in declaration of ?apply_paravirt? arch/i386/kernel/alternative.c:437: error: ?__start_parainstructions? undeclared here (not in a function) arch/i386/kernel/alternative.c:437: warning: type defaults to ?int? in declaration of ?__start_parainstructions? arch/i386/kernel/alternative.c:438: error: ?__stop_parainstructions? undeclared here (not in a function) arch/i386/kernel/alternative.c:438: warni...

...;instrtype, p->instr, p->len); + /* Pad the rest with nops */ + diff = p->len - used; + for (i = used; diff > 0; diff -= k, i += k) { + k = diff; + if (k > ASM_NOP_MAX) + k = ASM_NOP_MAX; + memcpy(p->instr + i, noptable[k], k); + } + } +} +extern struct paravirt_patch __start_parainstructions[], + __stop_parainstructions[]; +#else +void apply_paravirt(struct paravirt_patch *start, struct paravirt_patch *end) +{ +} +extern char __start_parainstructions[], __stop_parainstructions[]; +#endif /* CONFIG_PARAVIRT */ + void __init alternative_instructions(void) { apply_alternatives(__alt_i...

...;instrtype, p->instr, p->len); + /* Pad the rest with nops */ + diff = p->len - used; + for (i = used; diff > 0; diff -= k, i += k) { + k = diff; + if (k > ASM_NOP_MAX) + k = ASM_NOP_MAX; + memcpy(p->instr + i, noptable[k], k); + } + } +} +extern struct paravirt_patch __start_parainstructions[], + __stop_parainstructions[]; +#else +void apply_paravirt(struct paravirt_patch *start, struct paravirt_patch *end) +{ +} +extern char __start_parainstructions[], __stop_parainstructions[]; +#endif /* CONFIG_PARAVIRT */ + void __init alternative_instructions(void) { apply_alternatives(__alt_i...

Thanks to Andrew for pointing these out. This patch moves the parvirtprobe section into .init.data: it's only used in very very early boot, and for similar reasons, puts lguest_maybe_init and lguest_memory_setup in init.text. As well as fixing some warnings, this frees up a tiny bit more memory. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> diff -r ecec388180b2

Thanks to Andrew for pointing these out. This patch moves the parvirtprobe section into .init.data: it's only used in very very early boot, and for similar reasons, puts lguest_maybe_init and lguest_memory_setup in init.text. As well as fixing some warnings, this frees up a tiny bit more memory. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> diff -r ecec388180b2

...tructions = .; *(.altinstructions) + __alt_instructions_end = .; } - __alt_instructions_end = .; .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) { *(.altinstr_replacement) } + . = ALIGN(8); + .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) { + __start_parainstructions = .; + *(.parainstructions) + __stop_parainstructions = .; + } /* .exit.text is discard at runtime, not link time, to deal with references from .altinstructions and .eh_frame */ .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) } --

...tructions = .; *(.altinstructions) + __alt_instructions_end = .; } - __alt_instructions_end = .; .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) { *(.altinstr_replacement) } + . = ALIGN(8); + .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) { + __start_parainstructions = .; + *(.parainstructions) + __stop_parainstructions = .; + } /* .exit.text is discard at runtime, not link time, to deal with references from .altinstructions and .eh_frame */ .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) } --

OK, this is the revised paravirt.h (Andi has seen this before), then the second is the binary patching stuff. More things get added to the paravirt struct in future patches, but this basic stuff hasn't changed for some time. ==== This patch does the dumbest possible replacement of paravirtualized instructions: calls through a "paravirt_ops" structure. Currently these are function

Hi Andi, This is a set of updates for the firstfloor patch queue. Quick rundown: revert-mm-x86_64-mm-account-for-module-percpu-space-separately-from-kernel-percpu.patch separate-module-percpu-space.patch Update the module percpu accounting patch fix-ff-allow-percpu-variables-to-be-page-aligned.patch Make sure the percpu memory allocation is page-aligned

Hi Andi, This is a set of updates for the firstfloor patch queue. Quick rundown: revert-mm-x86_64-mm-account-for-module-percpu-space-separately-from-kernel-percpu.patch separate-module-percpu-space.patch Update the module percpu accounting patch fix-ff-allow-percpu-variables-to-be-page-aligned.patch Make sure the percpu memory allocation is page-aligned

..., pte_t *, unsigned); + void (fastcall *update_pte)(pte_t *, unsigned); + void (fastcall *set_linear_mapping)(int, u32, u32, u32); + void (fastcall *flush_tlb)(int); + void (fastcall *set_initial_ap_state)(int, int); +} vmi_ops; + +/* XXX move this to alternative.h */ +extern struct paravirt_patch __start_parainstructions[], + __stop_parainstructions[]; + +/* + * VMI patching routines. + */ +#define MNEM_CALL 0xe8 +#define MNEM_JMP 0xe9 +#define MNEM_RET 0xc3 + +static char irq_save_disable_callout[] = { + MNEM_CALL, 0, 0, 0, 0, + MNEM_CALL, 0, 0, 0, 0, + MNEM_RET +}; +#define IRQ_PATCH_INT_MASK 0 +#define IRQ_PAT...

..., pte_t *, unsigned); + void (fastcall *update_pte)(pte_t *, unsigned); + void (fastcall *set_linear_mapping)(int, u32, u32, u32); + void (fastcall *flush_tlb)(int); + void (fastcall *set_initial_ap_state)(int, int); +} vmi_ops; + +/* XXX move this to alternative.h */ +extern struct paravirt_patch __start_parainstructions[], + __stop_parainstructions[]; + +/* + * VMI patching routines. + */ +#define MNEM_CALL 0xe8 +#define MNEM_JMP 0xe9 +#define MNEM_RET 0xc3 + +static char irq_save_disable_callout[] = { + MNEM_CALL, 0, 0, 0, 0, + MNEM_CALL, 0, 0, 0, 0, + MNEM_RET +}; +#define IRQ_PATCH_INT_MASK 0 +#define IRQ_PAT...

The following patches introduce the core infrastructure needed to paravirtualize the 32-bit x86 Linux kernel. This is done by moving virtualization sensitive insn's or code paths to a function table, paravirt_ops. This structure can be populated with hypervisor specific calls or native stubs and currently support running on bare metal, VMI, Xen, or Lhype. These patches apply to

The following patches introduce the core infrastructure needed to paravirtualize the 32-bit x86 Linux kernel. This is done by moving virtualization sensitive insn's or code paths to a function table, paravirt_ops. This structure can be populated with hypervisor specific calls or native stubs and currently support running on bare metal, VMI, Xen, or Lhype. These patches apply to

..., pte_t *, unsigned); + void (fastcall *update_pte)(pte_t *, unsigned); + void (fastcall *set_linear_mapping)(int, u32, u32, u32); + void (fastcall *flush_tlb)(int); + void (fastcall *set_initial_ap_state)(int, int); +} vmi_ops; + +/* XXX move this to alternative.h */ +extern struct paravirt_patch __start_parainstructions[], + __stop_parainstructions[]; + +/* + * VMI patching routines. + */ +#define MNEM_CALL 0xe8 +#define MNEM_JMP 0xe9 +#define MNEM_RET 0xc3 + +static char irq_save_disable_callout[] = { + MNEM_CALL, 0, 0, 0, 0, + MNEM_CALL, 0, 0, 0, 0, + MNEM_RET +}; +#define IRQ_PATCH_INT_MASK 0 +#define IRQ_PAT...