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qemu/0067-target-i386-clear-C-bit-when-walkin.patch

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From a8962df0b33d17e6af91ec6c3d0f2bf0e866c84e Mon Sep 17 00:00:00 2001
From: Brijesh Singh <brijesh.singh@amd.com>
Date: Thu, 15 Feb 2018 09:03:23 -0600
Subject: [PATCH] target/i386: clear C-bit when walking SEV guest page table
In SEV-enabled guest the pte entry will have C-bit set, we need to
clear the C-bit when walking the page table.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
[BR: FATE#322124]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
target/i386/helper.c | 31 +++++++++++++----------
target/i386/monitor.c | 69 +++++++++++++++++++++++++++++++++------------------
2 files changed, 63 insertions(+), 37 deletions(-)
diff --git a/target/i386/helper.c b/target/i386/helper.c
index 5dc9e8839b..999154e21e 100644
--- a/target/i386/helper.c
+++ b/target/i386/helper.c
@@ -21,6 +21,7 @@
#include "cpu.h"
#include "exec/exec-all.h"
#include "sysemu/kvm.h"
+#include "sysemu/sev.h"
#include "kvm_i386.h"
#ifndef CONFIG_USER_ONLY
#include "sysemu/sysemu.h"
@@ -732,6 +733,9 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
int32_t a20_mask;
uint32_t page_offset;
int page_size;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
a20_mask = x86_get_a20_mask(env);
if (!(env->cr[0] & CR0_PG_MASK)) {
@@ -755,25 +759,25 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
}
if (la57) {
- pml5e_addr = ((env->cr[3] & ~0xfff) +
+ pml5e_addr = ((env->cr[3] & ~0xfff & me_mask) +
(((addr >> 48) & 0x1ff) << 3)) & a20_mask;
- pml5e = ldq_phys_debug(cs, pml5e_addr);
+ pml5e = ldq_phys_debug(cs, pml5e_addr) & me_mask;
if (!(pml5e & PG_PRESENT_MASK)) {
return -1;
}
} else {
- pml5e = env->cr[3];
+ pml5e = env->cr[3] & me_mask;
}
pml4e_addr = ((pml5e & PG_ADDRESS_MASK) +
(((addr >> 39) & 0x1ff) << 3)) & a20_mask;
- pml4e = ldq_phys_debug(cs, pml4e_addr);
+ pml4e = ldq_phys_debug(cs, pml4e_addr) & me_mask;
if (!(pml4e & PG_PRESENT_MASK)) {
return -1;
}
pdpe_addr = ((pml4e & PG_ADDRESS_MASK) +
(((addr >> 30) & 0x1ff) << 3)) & a20_mask;
- pdpe = x86_ldq_phys(cs, pdpe_addr);
+ pdpe = ldq_phys_debug(cs, pdpe_addr) & me_mask;
if (!(pdpe & PG_PRESENT_MASK)) {
return -1;
}
@@ -786,16 +790,16 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
} else
#endif
{
- pdpe_addr = ((env->cr[3] & ~0x1f) + ((addr >> 27) & 0x18)) &
- a20_mask;
- pdpe = ldq_phys_debug(cs, pdpe_addr);
+ pdpe_addr = ((env->cr[3] & ~0x1f & me_mask) + ((addr >> 27) & 0x18))
+ & a20_mask;
+ pdpe = ldq_phys_debug(cs, pdpe_addr) & me_mask;
if (!(pdpe & PG_PRESENT_MASK))
return -1;
}
pde_addr = ((pdpe & PG_ADDRESS_MASK) +
(((addr >> 21) & 0x1ff) << 3)) & a20_mask;
- pde = ldq_phys_debug(cs, pde_addr);
+ pde = ldq_phys_debug(cs, pde_addr) & me_mask;
if (!(pde & PG_PRESENT_MASK)) {
return -1;
}
@@ -808,7 +812,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
pte_addr = ((pde & PG_ADDRESS_MASK) +
(((addr >> 12) & 0x1ff) << 3)) & a20_mask;
page_size = 4096;
- pte = ldq_phys_debug(cs, pte_addr);
+ pte = ldq_phys_debug(cs, pte_addr) & me_mask;
}
if (!(pte & PG_PRESENT_MASK)) {
return -1;
@@ -817,8 +821,9 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
uint32_t pde;
/* page directory entry */
- pde_addr = ((env->cr[3] & ~0xfff) + ((addr >> 20) & 0xffc)) & a20_mask;
- pde = ldl_phys_debug(cs, pde_addr);
+ pde_addr = ((env->cr[3] & ~0xfff & me_mask) + ((addr >> 20) & 0xffc))
+ & a20_mask;
+ pde = ldl_phys_debug(cs, pde_addr) & me_mask;
if (!(pde & PG_PRESENT_MASK))
return -1;
if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
@@ -827,7 +832,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
} else {
/* page directory entry */
pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) & a20_mask;
- pte = ldl_phys_debug(cs, pte_addr);
+ pte = ldl_phys_debug(cs, pte_addr) & me_mask;
if (!(pte & PG_PRESENT_MASK)) {
return -1;
}
diff --git a/target/i386/monitor.c b/target/i386/monitor.c
index 63f7125ba8..44ae31d13b 100644
--- a/target/i386/monitor.c
+++ b/target/i386/monitor.c
@@ -27,6 +27,7 @@
#include "monitor/hmp-target.h"
#include "hw/i386/pc.h"
#include "sysemu/kvm.h"
+#include "sysemu/sev.h"
#include "hmp.h"
@@ -93,16 +94,20 @@ static void tlb_info_pae32(Monitor *mon, CPUArchState *env)
unsigned int l1, l2, l3;
uint64_t pdpe, pde, pte;
uint64_t pdp_addr, pd_addr, pt_addr;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
pdp_addr = env->cr[3] & ~0x1f;
+ pdp_addr &= me_mask;
for (l1 = 0; l1 < 4; l1++) {
cpu_physical_memory_read_debug(pdp_addr + l1 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
if (pdpe & PG_PRESENT_MASK) {
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pd_addr + l2 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
if (pde & PG_PRESENT_MASK) {
if (pde & PG_PSE_MASK) {
/* 2M pages with PAE, CR4.PSE is ignored */
@@ -113,7 +118,7 @@ static void tlb_info_pae32(Monitor *mon, CPUArchState *env)
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pt_addr + l3 * 8,
&pte, 8);
- pte = le64_to_cpu(pte);
+ pte = le64_to_cpu(pte & me_mask);
if (pte & PG_PRESENT_MASK) {
print_pte(mon, env, (l1 << 30) + (l2 << 21)
+ (l3 << 12),
@@ -135,10 +140,13 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
uint64_t l1, l2, l3, l4;
uint64_t pml4e, pdpe, pde, pte;
uint64_t pdp_addr, pd_addr, pt_addr;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
for (l1 = 0; l1 < 512; l1++) {
cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
- pml4e = le64_to_cpu(pml4e);
+ pml4e = le64_to_cpu(pml4e & me_mask);
if (!(pml4e & PG_PRESENT_MASK)) {
continue;
}
@@ -146,7 +154,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
if (!(pdpe & PG_PRESENT_MASK)) {
continue;
}
@@ -161,7 +169,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pd_addr + l3 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
if (!(pde & PG_PRESENT_MASK)) {
continue;
}
@@ -176,7 +184,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pt_addr = pde & 0x3fffffffff000ULL;
for (l4 = 0; l4 < 512; l4++) {
cpu_physical_memory_read_debug(pt_addr + l4 * 8, &pte, 8);
- pte = le64_to_cpu(pte);
+ pte = le64_to_cpu(pte & me_mask);
if (pte & PG_PRESENT_MASK) {
print_pte(mon, env, (l0 << 48) + (l1 << 39) +
(l2 << 30) + (l3 << 21) + (l4 << 12),
@@ -193,11 +201,14 @@ static void tlb_info_la57(Monitor *mon, CPUArchState *env)
uint64_t l0;
uint64_t pml5e;
uint64_t pml5_addr;
+ uint64_t me_mask;
- pml5_addr = env->cr[3] & 0x3fffffffff000ULL;
+ me_mask = sev_get_me_mask();
+
+ pml5_addr = env->cr[3] & 0x3fffffffff000ULL & me_mask;
for (l0 = 0; l0 < 512; l0++) {
cpu_physical_memory_read_debug(pml5_addr + l0 * 8, &pml5e, 8);
- pml5e = le64_to_cpu(pml5e);
+ pml5e = le64_to_cpu(pml5e & me_mask);
if (pml5e & PG_PRESENT_MASK) {
tlb_info_la48(mon, env, l0, pml5e & 0x3fffffffff000ULL);
}
@@ -225,7 +236,8 @@ void hmp_info_tlb(Monitor *mon, const QDict *qdict)
if (env->cr[4] & CR4_LA57_MASK) {
tlb_info_la57(mon, env);
} else {
- tlb_info_la48(mon, env, 0, env->cr[3] & 0x3fffffffff000ULL);
+ tlb_info_la48(mon, env, 0, env->cr[3] & 0x3fffffffff000ULL &
+ sev_get_me_mask());
}
} else
#endif
@@ -309,19 +321,22 @@ static void mem_info_pae32(Monitor *mon, CPUArchState *env)
uint64_t pdpe, pde, pte;
uint64_t pdp_addr, pd_addr, pt_addr;
hwaddr start, end;
+ uint64_t me_mask;
- pdp_addr = env->cr[3] & ~0x1f;
+ me_mask = sev_get_me_mask();
+
+ pdp_addr = env->cr[3] & ~0x1f & me_mask;
last_prot = 0;
start = -1;
for (l1 = 0; l1 < 4; l1++) {
cpu_physical_memory_read_debug(pdp_addr + l1 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
end = l1 << 30;
if (pdpe & PG_PRESENT_MASK) {
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pd_addr + l2 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
end = (l1 << 30) + (l2 << 21);
if (pde & PG_PRESENT_MASK) {
if (pde & PG_PSE_MASK) {
@@ -333,7 +348,7 @@ static void mem_info_pae32(Monitor *mon, CPUArchState *env)
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pt_addr + l3 * 8,
&pte, 8);
- pte = le64_to_cpu(pte);
+ pte = le64_to_cpu(pte & me_mask);
end = (l1 << 30) + (l2 << 21) + (l3 << 12);
if (pte & PG_PRESENT_MASK) {
prot = pte & pde & (PG_USER_MASK | PG_RW_MASK |
@@ -366,19 +381,22 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
uint64_t l1, l2, l3, l4;
uint64_t pml4e, pdpe, pde, pte;
uint64_t pml4_addr, pdp_addr, pd_addr, pt_addr, start, end;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
- pml4_addr = env->cr[3] & 0x3fffffffff000ULL;
+ pml4_addr = env->cr[3] & 0x3fffffffff000ULL & me_mask;
last_prot = 0;
start = -1;
for (l1 = 0; l1 < 512; l1++) {
cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
- pml4e = le64_to_cpu(pml4e);
+ pml4e = le64_to_cpu(pml4e & me_mask);
end = l1 << 39;
if (pml4e & PG_PRESENT_MASK) {
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
end = (l1 << 39) + (l2 << 30);
if (pdpe & PG_PRESENT_MASK) {
if (pdpe & PG_PSE_MASK) {
@@ -391,7 +409,7 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pd_addr + l3 * 8,
&pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
end = (l1 << 39) + (l2 << 30) + (l3 << 21);
if (pde & PG_PRESENT_MASK) {
if (pde & PG_PSE_MASK) {
@@ -405,7 +423,7 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
cpu_physical_memory_read_debug(pt_addr
+ l4 * 8,
&pte, 8);
- pte = le64_to_cpu(pte);
+ pte = le64_to_cpu(pte & me_mask);
end = (l1 << 39) + (l2 << 30) +
(l3 << 21) + (l4 << 12);
if (pte & PG_PRESENT_MASK) {
@@ -444,13 +462,16 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
uint64_t l0, l1, l2, l3, l4;
uint64_t pml5e, pml4e, pdpe, pde, pte;
uint64_t pml5_addr, pml4_addr, pdp_addr, pd_addr, pt_addr, start, end;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
- pml5_addr = env->cr[3] & 0x3fffffffff000ULL;
+ pml5_addr = env->cr[3] & 0x3fffffffff000ULL & me_mask;
last_prot = 0;
start = -1;
for (l0 = 0; l0 < 512; l0++) {
cpu_physical_memory_read_debug(pml5_addr + l0 * 8, &pml5e, 8);
- pml5e = le64_to_cpu(pml5e);
+ pml5e = le64_to_cpu(pml5e & me_mask);
end = l0 << 48;
if (!(pml5e & PG_PRESENT_MASK)) {
prot = 0;
@@ -461,7 +482,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pml4_addr = pml5e & 0x3fffffffff000ULL;
for (l1 = 0; l1 < 512; l1++) {
cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
- pml4e = le64_to_cpu(pml4e);
+ pml4e = le64_to_cpu(pml4e & me_mask);
end = (l0 << 48) + (l1 << 39);
if (!(pml4e & PG_PRESENT_MASK)) {
prot = 0;
@@ -472,7 +493,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
end = (l0 << 48) + (l1 << 39) + (l2 << 30);
if (pdpe & PG_PRESENT_MASK) {
prot = 0;
@@ -491,7 +512,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pd_addr + l3 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
end = (l0 << 48) + (l1 << 39) + (l2 << 30) + (l3 << 21);
if (pde & PG_PRESENT_MASK) {
prot = 0;
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