Mailing List Archive

From: Zhang Xiantao <xiantao.zhang@intel.com>

EPT and NPT adopts differnt formats for each-level entry,
so change the walker functions to vendor-specific.

Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Acked-by: Tim Deegan <tim@xen.org>
---
xen/arch/x86/hvm/svm/nestedsvm.c | 31 +++++++++++++++++++++
xen/arch/x86/hvm/svm/svm.c | 1 +
xen/arch/x86/hvm/vmx/vmx.c | 3 +-
xen/arch/x86/hvm/vmx/vvmx.c | 13 +++++++++
xen/arch/x86/mm/hap/nested_hap.c | 46 +++++++++++--------------------
xen/include/asm-x86/hvm/hvm.h | 5 +++
xen/include/asm-x86/hvm/svm/nestedsvm.h | 3 ++
xen/include/asm-x86/hvm/vmx/vvmx.h | 5 +++
8 files changed, 76 insertions(+), 31 deletions(-)

diff --git a/xen/arch/x86/hvm/svm/nestedsvm.c b/xen/arch/x86/hvm/svm/nestedsvm.c
index ed0faa6..c1c6fa7 100644
--- a/xen/arch/x86/hvm/svm/nestedsvm.c
+++ b/xen/arch/x86/hvm/svm/nestedsvm.c
@@ -1171,6 +1171,37 @@ nsvm_vmcb_hap_enabled(struct vcpu *v)
return vcpu_nestedsvm(v).ns_hap_enabled;
}

+/* This function uses L2_gpa to walk the P2M page table in L1. If the
+ * walk is successful, the translated value is returned in
+ * L1_gpa. The result value tells what to do next.
+ */
+int
+nsvm_hap_walk_L1_p2m(struct vcpu *v, paddr_t L2_gpa, paddr_t *L1_gpa,
+ unsigned int *page_order,
+ bool_t access_r, bool_t access_w, bool_t access_x)
+{
+ uint32_t pfec;
+ unsigned long nested_cr3, gfn;
+
+ nested_cr3 = nhvm_vcpu_p2m_base(v);
+
+ pfec = PFEC_user_mode | PFEC_page_present;
+ if ( access_w )
+ pfec |= PFEC_write_access;
+ if ( access_x )
+ pfec |= PFEC_insn_fetch;
+
+ /* Walk the guest-supplied NPT table, just as if it were a pagetable */
+ gfn = paging_ga_to_gfn_cr3(v, nested_cr3, L2_gpa, &pfec, page_order);
+
+ if ( gfn == INVALID_GFN )
+ return NESTEDHVM_PAGEFAULT_INJECT;
+
+ *L1_gpa = (gfn << PAGE_SHIFT) + (L2_gpa & ~PAGE_MASK);
+ return NESTEDHVM_PAGEFAULT_DONE;
+}
+
+
enum hvm_intblk nsvm_intr_blocked(struct vcpu *v)
{
struct nestedsvm *svm = &vcpu_nestedsvm(v);
diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
index 2c8504a..acd2d49 100644
--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -2008,6 +2008,7 @@ static struct hvm_function_table __read_mostly svm_function_table = {
.nhvm_vmcx_guest_intercepts_trap = nsvm_vmcb_guest_intercepts_trap,
.nhvm_vmcx_hap_enabled = nsvm_vmcb_hap_enabled,
.nhvm_intr_blocked = nsvm_intr_blocked,
+ .nhvm_hap_walk_L1_p2m = nsvm_hap_walk_L1_p2m,
};

void svm_vmexit_handler(struct cpu_user_regs *regs)
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 98309da..4abfa90 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -1511,7 +1511,8 @@ static struct hvm_function_table __read_mostly vmx_function_table = {
.nhvm_intr_blocked = nvmx_intr_blocked,
.nhvm_domain_relinquish_resources = nvmx_domain_relinquish_resources,
.update_eoi_exit_bitmap = vmx_update_eoi_exit_bitmap,
- .virtual_intr_delivery_enabled = vmx_virtual_intr_delivery_enabled
+ .virtual_intr_delivery_enabled = vmx_virtual_intr_delivery_enabled,
+ .nhvm_hap_walk_L1_p2m = nvmx_hap_walk_L1_p2m,
};

struct hvm_function_table * __init start_vmx(void)
diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c
index 6999c25..53f6a4d 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -1479,6 +1479,19 @@ int nvmx_msr_write_intercept(unsigned int msr, u64 msr_content)
return 1;
}

+/* This function uses L2_gpa to walk the P2M page table in L1. If the
+ * walk is successful, the translated value is returned in
+ * L1_gpa. The result value tells what to do next.
+ */
+int
+nvmx_hap_walk_L1_p2m(struct vcpu *v, paddr_t L2_gpa, paddr_t *L1_gpa,
+ unsigned int *page_order,
+ bool_t access_r, bool_t access_w, bool_t access_x)
+{
+ /*TODO:*/
+ return 0;
+}
+
void nvmx_idtv_handling(void)
{
struct vcpu *v = current;
diff --git a/xen/arch/x86/mm/hap/nested_hap.c b/xen/arch/x86/mm/hap/nested_hap.c
index f9a5edc..8787c91 100644
--- a/xen/arch/x86/mm/hap/nested_hap.c
+++ b/xen/arch/x86/mm/hap/nested_hap.c
@@ -136,6 +136,22 @@ nestedhap_fix_p2m(struct vcpu *v, struct p2m_domain *p2m,
}
}

+/* This function uses L2_gpa to walk the P2M page table in L1. If the
+ * walk is successful, the translated value is returned in
+ * L1_gpa. The result value tells what to do next.
+ */
+static int
+nestedhap_walk_L1_p2m(struct vcpu *v, paddr_t L2_gpa, paddr_t *L1_gpa,
+ unsigned int *page_order,
+ bool_t access_r, bool_t access_w, bool_t access_x)
+{
+ ASSERT(hvm_funcs.nhvm_hap_walk_L1_p2m);
+
+ return hvm_funcs.nhvm_hap_walk_L1_p2m(v, L2_gpa, L1_gpa, page_order,
+ access_r, access_w, access_x);
+}
+
+
/* This function uses L1_gpa to walk the P2M table in L0 hypervisor. If the
* walk is successful, the translated value is returned in L0_gpa. The return
* value tells the upper level what to do.
@@ -175,36 +191,6 @@ out:
return rc;
}

-/* This function uses L2_gpa to walk the P2M page table in L1. If the
- * walk is successful, the translated value is returned in
- * L1_gpa. The result value tells what to do next.
- */
-static int
-nestedhap_walk_L1_p2m(struct vcpu *v, paddr_t L2_gpa, paddr_t *L1_gpa,
- unsigned int *page_order,
- bool_t access_r, bool_t access_w, bool_t access_x)
-{
- uint32_t pfec;
- unsigned long nested_cr3, gfn;
-
- nested_cr3 = nhvm_vcpu_p2m_base(v);
-
- pfec = PFEC_user_mode | PFEC_page_present;
- if (access_w)
- pfec |= PFEC_write_access;
- if (access_x)
- pfec |= PFEC_insn_fetch;
-
- /* Walk the guest-supplied NPT table, just as if it were a pagetable */
- gfn = paging_ga_to_gfn_cr3(v, nested_cr3, L2_gpa, &pfec, page_order);
-
- if ( gfn == INVALID_GFN )
- return NESTEDHVM_PAGEFAULT_INJECT;
-
- *L1_gpa = (gfn << PAGE_SHIFT) + (L2_gpa & ~PAGE_MASK);
- return NESTEDHVM_PAGEFAULT_DONE;
-}
-
/*
* The following function, nestedhap_page_fault(), is for steps (3)--(10).
*
diff --git a/xen/include/asm-x86/hvm/hvm.h b/xen/include/asm-x86/hvm/hvm.h
index d3535b6..80f07e9 100644
--- a/xen/include/asm-x86/hvm/hvm.h
+++ b/xen/include/asm-x86/hvm/hvm.h
@@ -183,6 +183,11 @@ struct hvm_function_table {
/* Virtual interrupt delivery */
void (*update_eoi_exit_bitmap)(struct vcpu *v, u8 vector, u8 trig);
int (*virtual_intr_delivery_enabled)(void);
+
+ /*Walk nested p2m */
+ int (*nhvm_hap_walk_L1_p2m)(struct vcpu *v, paddr_t L2_gpa, paddr_t *L1_gpa,
+ unsigned int *page_order,
+ bool_t access_r, bool_t access_w, bool_t access_x);
};

extern struct hvm_function_table hvm_funcs;
diff --git a/xen/include/asm-x86/hvm/svm/nestedsvm.h b/xen/include/asm-x86/hvm/svm/nestedsvm.h
index fa83023..0c90f30 100644
--- a/xen/include/asm-x86/hvm/svm/nestedsvm.h
+++ b/xen/include/asm-x86/hvm/svm/nestedsvm.h
@@ -133,6 +133,9 @@ int nsvm_wrmsr(struct vcpu *v, unsigned int msr, uint64_t msr_content);
void svm_vmexit_do_clgi(struct cpu_user_regs *regs, struct vcpu *v);
void svm_vmexit_do_stgi(struct cpu_user_regs *regs, struct vcpu *v);
bool_t nestedsvm_gif_isset(struct vcpu *v);
+int nsvm_hap_walk_L1_p2m(struct vcpu *v, paddr_t L2_gpa, paddr_t *L1_gpa,
+ unsigned int *page_order,
+ bool_t access_r, bool_t access_w, bool_t access_x);

#define NSVM_INTR_NOTHANDLED 3
#define NSVM_INTR_NOTINTERCEPTED 2
diff --git a/xen/include/asm-x86/hvm/vmx/vvmx.h b/xen/include/asm-x86/hvm/vmx/vvmx.h
index d97011d..422f006 100644
--- a/xen/include/asm-x86/hvm/vmx/vvmx.h
+++ b/xen/include/asm-x86/hvm/vmx/vvmx.h
@@ -108,6 +108,11 @@ void nvmx_domain_relinquish_resources(struct domain *d);

int nvmx_handle_vmxon(struct cpu_user_regs *regs);
int nvmx_handle_vmxoff(struct cpu_user_regs *regs);
+
+int
+nvmx_hap_walk_L1_p2m(struct vcpu *v, paddr_t L2_gpa, paddr_t *L1_gpa,
+ unsigned int *page_order,
+ bool_t access_r, bool_t access_w, bool_t access_x);
/*
* Virtual VMCS layout
*
--
1.7.1


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