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| author | David S. Miller <davem@davemloft.net> | 2008-07-05 23:08:07 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-07-05 23:08:07 -0700 |
| commit | ea2aca084ba82aaf7c148d04914ceed8758ce08a (patch) | |
| tree | dcb3f4f849cf48deac2dd3bafd5c2cd2f0e7dc79 /drivers/lguest/x86/core.c | |
| parent | f3032be921cd126615ce3bfd7084e3d319f3f892 (diff) | |
| parent | c5a78ac00c400df29645e59938700301efb371d0 (diff) | |
| download | kernel_samsung_smdk4412-ea2aca084ba82aaf7c148d04914ceed8758ce08a.zip kernel_samsung_smdk4412-ea2aca084ba82aaf7c148d04914ceed8758ce08a.tar.gz kernel_samsung_smdk4412-ea2aca084ba82aaf7c148d04914ceed8758ce08a.tar.bz2 | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
Documentation/feature-removal-schedule.txt
drivers/net/wan/hdlc_fr.c
drivers/net/wireless/iwlwifi/iwl-4965.c
drivers/net/wireless/iwlwifi/iwl3945-base.c
Diffstat (limited to 'drivers/lguest/x86/core.c')
| -rw-r--r-- | drivers/lguest/x86/core.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c index 5126d5d..2e554a4 100644 --- a/drivers/lguest/x86/core.c +++ b/drivers/lguest/x86/core.c @@ -176,7 +176,7 @@ void lguest_arch_run_guest(struct lg_cpu *cpu) * we set it now, so we can trap and pass that trap to the Guest if it * uses the FPU. */ if (cpu->ts) - lguest_set_ts(); + unlazy_fpu(current); /* SYSENTER is an optimized way of doing system calls. We can't allow * it because it always jumps to privilege level 0. A normal Guest @@ -196,6 +196,10 @@ void lguest_arch_run_guest(struct lg_cpu *cpu) * trap made the switcher code come back, and an error code which some * traps set. */ + /* Restore SYSENTER if it's supposed to be on. */ + if (boot_cpu_has(X86_FEATURE_SEP)) + wrmsr(MSR_IA32_SYSENTER_CS, __KERNEL_CS, 0); + /* If the Guest page faulted, then the cr2 register will tell us the * bad virtual address. We have to grab this now, because once we * re-enable interrupts an interrupt could fault and thus overwrite @@ -203,13 +207,12 @@ void lguest_arch_run_guest(struct lg_cpu *cpu) if (cpu->regs->trapnum == 14) cpu->arch.last_pagefault = read_cr2(); /* Similarly, if we took a trap because the Guest used the FPU, - * we have to restore the FPU it expects to see. */ + * we have to restore the FPU it expects to see. + * math_state_restore() may sleep and we may even move off to + * a different CPU. So all the critical stuff should be done + * before this. */ else if (cpu->regs->trapnum == 7) math_state_restore(); - - /* Restore SYSENTER if it's supposed to be on. */ - if (boot_cpu_has(X86_FEATURE_SEP)) - wrmsr(MSR_IA32_SYSENTER_CS, __KERNEL_CS, 0); } /*H:130 Now we've examined the hypercall code; our Guest can make requests. |