diff options
| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-10-18 23:58:28 -0700 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-10-18 23:58:28 -0700 |
| commit | 378e05b539bdc7fed704070125480a4b7b58cef6 (patch) | |
| tree | 35553136e570f4272fbb52659aa57cbd5dba0631 | |
| parent | 65b8e3da92e15a5012b1cec2daf9c931351a14e9 (diff) | |
| download | xen/mmu-perf-tweak.tar.gz | |
x86-32: add patching for set_pte* where possiblexen/mmu-perf-tweak
When using PAE, the code can get too large to inline - or have on-stack
parameters - so only inline where possible.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| -rw-r--r-- | arch/x86/kernel/paravirt_patch_32.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/kernel/paravirt_patch_32.c b/arch/x86/kernel/paravirt_patch_32.c index d9f32e6d6ab654..ce5209bc4c5c65 100644 --- a/arch/x86/kernel/paravirt_patch_32.c +++ b/arch/x86/kernel/paravirt_patch_32.c @@ -11,6 +11,15 @@ DEF_NATIVE(pv_mmu_ops, write_cr3, "mov %eax, %cr3"); DEF_NATIVE(pv_mmu_ops, read_cr3, "mov %cr3, %eax"); DEF_NATIVE(pv_cpu_ops, clts, "clts"); DEF_NATIVE(pv_cpu_ops, read_tsc, "rdtsc"); +#if PAGETABLE_LEVELS < 3 +DEF_NATIVE(pv_mmu_ops, set_pte, "mov %edx, (%eax)"); +DEF_NATIVE(pv_mmu_ops, set_pte_at, "mov %eax, (%ecx)"); +DEF_NATIVE(pv_mmu_ops, ptep_modify_prot_start, "xor %eax, %eax; xchg %eax, (%ecx)"); +DEF_NATIVE(pv_mmu_ops, ptep_modify_prot_commit, "mov %eax, (%ecx)"); +#else +DEF_NATIVE(pv_mmu_ops, set_pte, "mov %ecx,0x4(%eax); mov %edx,(%eax)"); +DEF_NATIVE(pv_mmu_ops, ptep_modify_prot_start, "xor %eax, %eax; xchg %eax, (%ecx); mov 4(%ecx), %edx"); +#endif unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len) { @@ -47,6 +56,12 @@ unsigned native_patch(u8 type, u16 clobbers, void *ibuf, PATCH_SITE(pv_mmu_ops, write_cr3); PATCH_SITE(pv_cpu_ops, clts); PATCH_SITE(pv_cpu_ops, read_tsc); + PATCH_SITE(pv_mmu_ops, set_pte); + PATCH_SITE(pv_mmu_ops, ptep_modify_prot_start); +#if PAGETABLE_LEVELS < 2 + PATCH_SITE(pv_mmu_ops, set_pte_at); + PATCH_SITE(pv_mmu_ops, ptep_modify_prot_commit); +#endif patch_site: ret = paravirt_patch_insns(ibuf, len, start, end); |