KVM: do not use sigtimedwait to catch SIGBUS

[mirror_qemu.git] / target / ppc / kvm.c

diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 52bbea514a47f026507527d6b13a54037fb0f945..03f5097eabc794299ae42a6f02ad628d65e98384 100644 (file)
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -1251,7 +1251,7 @@ static int kvmppc_get_books_sregs(PowerPCCPU *cpu)
         return ret;
     }
 
-    if (!env->external_htab) {
+    if (!cpu->vhyp) {
         ppc_store_sdr1(env, sregs.u.s.sdr1);
     }
 
@@ -2582,103 +2582,89 @@ bool kvm_arch_stop_on_emulation_error(CPUState *cpu)
     return true;
 }
 
-int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
+void kvm_arch_init_irq_routing(KVMState *s)
 {
-    return 1;
 }
 
-int kvm_arch_on_sigbus(int code, void *addr)
+void kvmppc_read_hptes(ppc_hash_pte64_t *hptes, hwaddr ptex, int n)
 {
-    return 1;
-}
+    struct kvm_get_htab_fd ghf = {
+        .flags = 0,
+        .start_index = ptex,
+    };
+    int fd, rc;
+    int i;
 
-void kvm_arch_init_irq_routing(KVMState *s)
-{
-}
+    fd = kvm_vm_ioctl(kvm_state, KVM_PPC_GET_HTAB_FD, &ghf);
+    if (fd < 0) {
+        hw_error("kvmppc_read_hptes: Unable to open HPT fd");
+    }
 
-struct kvm_get_htab_buf {
-    struct kvm_get_htab_header header;
-    /*
-     * We require one extra byte for read
-     */
-    target_ulong hpte[(HPTES_PER_GROUP * 2) + 1];
-};
+    i = 0;
+    while (i < n) {
+        struct kvm_get_htab_header *hdr;
+        int m = n < HPTES_PER_GROUP ? n : HPTES_PER_GROUP;
+        char buf[sizeof(*hdr) + m * HASH_PTE_SIZE_64];
 
-uint64_t kvmppc_hash64_read_pteg(PowerPCCPU *cpu, target_ulong pte_index)
-{
-    int htab_fd;
-    struct kvm_get_htab_fd ghf;
-    struct kvm_get_htab_buf  *hpte_buf;
+        rc = read(fd, buf, sizeof(buf));
+        if (rc < 0) {
+            hw_error("kvmppc_read_hptes: Unable to read HPTEs");
+        }
 
-    ghf.flags = 0;
-    ghf.start_index = pte_index;
-    htab_fd = kvm_vm_ioctl(kvm_state, KVM_PPC_GET_HTAB_FD, &ghf);
-    if (htab_fd < 0) {
-        goto error_out;
-    }
+        hdr = (struct kvm_get_htab_header *)buf;
+        while ((i < n) && ((char *)hdr < (buf + rc))) {
+            int invalid = hdr->n_invalid;
 
-    hpte_buf = g_malloc0(sizeof(*hpte_buf));
-    /*
-     * Read the hpte group
-     */
-    if (read(htab_fd, hpte_buf, sizeof(*hpte_buf)) < 0) {
-        goto out_close;
-    }
+            if (hdr->index != (ptex + i)) {
+                hw_error("kvmppc_read_hptes: Unexpected HPTE index %"PRIu32
+                         " != (%"HWADDR_PRIu" + %d", hdr->index, ptex, i);
+            }
 
-    close(htab_fd);
-    return (uint64_t)(uintptr_t) hpte_buf->hpte;
+            memcpy(hptes + i, hdr + 1, HASH_PTE_SIZE_64 * hdr->n_valid);
+            i += hdr->n_valid;
 
-out_close:
-    g_free(hpte_buf);
-    close(htab_fd);
-error_out:
-    return 0;
-}
+            if ((n - i) < invalid) {
+                invalid = n - i;
+            }
+            memset(hptes + i, 0, invalid * HASH_PTE_SIZE_64);
+            i += hdr->n_invalid;
 
-void kvmppc_hash64_free_pteg(uint64_t token)
-{
-    struct kvm_get_htab_buf *htab_buf;
+            hdr = (struct kvm_get_htab_header *)
+                ((char *)(hdr + 1) + HASH_PTE_SIZE_64 * hdr->n_valid);
+        }
+    }
 
-    htab_buf = container_of((void *)(uintptr_t) token, struct kvm_get_htab_buf,
-                            hpte);
-    g_free(htab_buf);
-    return;
+    close(fd);
 }
 
-void kvmppc_hash64_write_pte(CPUPPCState *env, target_ulong pte_index,
-                             target_ulong pte0, target_ulong pte1)
+void kvmppc_write_hpte(hwaddr ptex, uint64_t pte0, uint64_t pte1)
 {
-    int htab_fd;
+    int fd, rc;
     struct kvm_get_htab_fd ghf;
-    struct kvm_get_htab_buf hpte_buf;
+    struct {
+        struct kvm_get_htab_header hdr;
+        uint64_t pte0;
+        uint64_t pte1;
+    } buf;
 
     ghf.flags = 0;
     ghf.start_index = 0;     /* Ignored */
-    htab_fd = kvm_vm_ioctl(kvm_state, KVM_PPC_GET_HTAB_FD, &ghf);
-    if (htab_fd < 0) {
-        goto error_out;
-    }
-
-    hpte_buf.header.n_valid = 1;
-    hpte_buf.header.n_invalid = 0;
-    hpte_buf.header.index = pte_index;
-    hpte_buf.hpte[0] = pte0;
-    hpte_buf.hpte[1] = pte1;
-    /*
-     * Write the hpte entry.
-     * CAUTION: write() has the warn_unused_result attribute. Hence we
-     * need to check the return value, even though we do nothing.
-     */
-    if (write(htab_fd, &hpte_buf, sizeof(hpte_buf)) < 0) {
-        goto out_close;
+    fd = kvm_vm_ioctl(kvm_state, KVM_PPC_GET_HTAB_FD, &ghf);
+    if (fd < 0) {
+        hw_error("kvmppc_write_hpte: Unable to open HPT fd");
     }
 
-out_close:
-    close(htab_fd);
-    return;
+    buf.hdr.n_valid = 1;
+    buf.hdr.n_invalid = 0;
+    buf.hdr.index = ptex;
+    buf.pte0 = cpu_to_be64(pte0);
+    buf.pte1 = cpu_to_be64(pte1);
 
-error_out:
-    return;
+    rc = write(fd, &buf, sizeof(buf));
+    if (rc != sizeof(buf)) {
+        hw_error("kvmppc_write_hpte: Unable to update KVM HPT");
+    }
+    close(fd);
 }
 
 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,