diff options
| author | Rusty Russell <rusty@rustcorp.com.au> | 2007-07-17 23:32:55 +1000 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-10-13 10:18:18 +0200 |
| commit | f802a307cb2cabdd0c6b48067dbe901d6fe27246 (patch) | |
| tree | 57c5faaada33142fff92be62a78555716feb597a | |
| parent | 707d92fa72b425bc919a84670c01402e81505c58 (diff) | |
KVM: Use standard CR3 flags, tighten checking
The kernel now has asm/cpu-features.h: use those macros instead of inventing
our own.
Also spell out definition of CR3_RESEVED_BITS, fix spelling and
tighten it for the non-PAE case.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Avi Kivity <avi@qumranet.com>
| -rw-r--r-- | drivers/kvm/kvm.h | 9 | ||||
| -rw-r--r-- | drivers/kvm/kvm_main.c | 33 | ||||
| -rw-r--r-- | drivers/kvm/paging_tmpl.h | 2 |
3 files changed, 25 insertions, 19 deletions
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index 7117c3b3cca..983c33f3837 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -19,12 +19,9 @@ #include <linux/kvm.h> #include <linux/kvm_para.h> -#define CR3_WPT_MASK (1ULL << 3) -#define CR3_PCD_MASK (1ULL << 4) - -#define CR3_RESEVED_BITS 0x07ULL -#define CR3_L_MODE_RESEVED_BITS (~((1ULL << 40) - 1) | 0x0fe7ULL) -#define CR3_FLAGS_MASK ((1ULL << 5) - 1) +#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1) +#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD)) +#define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL) #define CR4_VME_MASK (1ULL << 0) #define CR4_PSE_MASK (1ULL << 4) diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 5d8febe580d..34a571dee51 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -571,23 +571,32 @@ EXPORT_SYMBOL_GPL(set_cr4); void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) { if (is_long_mode(vcpu)) { - if (cr3 & CR3_L_MODE_RESEVED_BITS) { + if (cr3 & CR3_L_MODE_RESERVED_BITS) { printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); inject_gp(vcpu); return; } } else { - if (cr3 & CR3_RESEVED_BITS) { - printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); - inject_gp(vcpu); - return; - } - if (is_paging(vcpu) && is_pae(vcpu) && - !load_pdptrs(vcpu, cr3)) { - printk(KERN_DEBUG "set_cr3: #GP, pdptrs " - "reserved bits\n"); - inject_gp(vcpu); - return; + if (is_pae(vcpu)) { + if (cr3 & CR3_PAE_RESERVED_BITS) { + printk(KERN_DEBUG + "set_cr3: #GP, reserved bits\n"); + inject_gp(vcpu); + return; + } + if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { + printk(KERN_DEBUG "set_cr3: #GP, pdptrs " + "reserved bits\n"); + inject_gp(vcpu); + return; + } + } else { + if (cr3 & CR3_NONPAE_RESERVED_BITS) { + printk(KERN_DEBUG + "set_cr3: #GP, reserved bits\n"); + inject_gp(vcpu); + return; + } } } diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h index 4b5391c717f..01901ec3fe8 100644 --- a/drivers/kvm/paging_tmpl.h +++ b/drivers/kvm/paging_tmpl.h @@ -99,7 +99,7 @@ static int FNAME(walk_addr)(struct guest_walker *walker, walker->table = kmap_atomic(pfn_to_page(hpa >> PAGE_SHIFT), KM_USER0); ASSERT((!is_long_mode(vcpu) && is_pae(vcpu)) || - (vcpu->cr3 & ~(PAGE_MASK | CR3_FLAGS_MASK)) == 0); + (vcpu->cr3 & CR3_NONPAE_RESERVED_BITS) == 0); walker->inherited_ar = PT_USER_MASK | PT_WRITABLE_MASK; |