[src/trunk]: src/sys/uvm/pmap MI PMAP EFI_RUNTIME support

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d488cb9c2698
branches:  trunk
changeset: 372136:d488cb9c2698
user:      skrll <skrll%NetBSD.org@localhost>
date:      Fri Oct 28 07:16:34 2022 +0000

description:
MI PMAP EFI_RUNTIME support

diffstat:

 sys/arch/aarch64/conf/files.aarch64 |   3 +-
 sys/arch/arm/conf/files.arm         |   3 +-
 sys/arch/x86/conf/files.x86         |   4 +--
 sys/conf/files                      |   4 ++-
 sys/uvm/pmap/pmap.c                 |  38 ++++++++++++++++++++++++++++++++----
 5 files changed, 39 insertions(+), 13 deletions(-)

diffs (166 lines):

diff -r c4d837ee17fb -r d488cb9c2698 sys/arch/aarch64/conf/files.aarch64
--- a/sys/arch/aarch64/conf/files.aarch64       Fri Oct 28 06:22:26 2022 +0000
+++ b/sys/arch/aarch64/conf/files.aarch64       Fri Oct 28 07:16:34 2022 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: files.aarch64,v 1.39 2022/10/15 11:07:38 jmcneill Exp $
+#      $NetBSD: files.aarch64,v 1.40 2022/10/28 07:16:34 skrll Exp $
 
 defflag opt_cpuoptions.h       AARCH64_ALIGNMENT_CHECK
 defflag opt_cpuoptions.h       AARCH64_EL0_STACK_ALIGNMENT_CHECK
@@ -47,7 +47,6 @@
 file   arch/arm/arm/psci_arm.S                 psci
 
 # EFI support
-defflag        opt_efi.h               EFI_RUNTIME
 file   arch/arm/arm/efi_runtime.c              efi_runtime
 
 # PMAP options
diff -r c4d837ee17fb -r d488cb9c2698 sys/arch/arm/conf/files.arm
--- a/sys/arch/arm/conf/files.arm       Fri Oct 28 06:22:26 2022 +0000
+++ b/sys/arch/arm/conf/files.arm       Fri Oct 28 07:16:34 2022 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: files.arm,v 1.166 2022/04/02 11:16:07 skrll Exp $
+#      $NetBSD: files.arm,v 1.167 2022/10/28 07:16:34 skrll Exp $
 
 # temporary define to allow easy moving to ../arch/arm/arm32
 defflag                                ARM32
@@ -109,7 +109,6 @@
 file   arch/arm/arm/psci_arm.S                 psci
 
 # EFI support
-defflag        opt_efi.h               EFI_RUNTIME
 file   arch/arm/arm/efi_runtime.c              efi_runtime
 
 # New PMAP options
diff -r c4d837ee17fb -r d488cb9c2698 sys/arch/x86/conf/files.x86
--- a/sys/arch/x86/conf/files.x86       Fri Oct 28 06:22:26 2022 +0000
+++ b/sys/arch/x86/conf/files.x86       Fri Oct 28 07:16:34 2022 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: files.x86,v 1.124 2022/09/24 11:05:18 riastradh Exp $
+#      $NetBSD: files.x86,v 1.125 2022/10/28 07:16:34 skrll Exp $
 
 # options for MP configuration through the MP spec
 defflag opt_mpbios.h MPBIOS MPDEBUG MPBIOS_SCANPCI
@@ -21,8 +21,6 @@
 # Option to have a static kernel memory layout
 defflag opt_kaslr.h    NO_X86_ASLR
 
-defflag opt_efi.h      EFI_RUNTIME
-
 defflag        SVS
 
 defflag        PCPU_IDT
diff -r c4d837ee17fb -r d488cb9c2698 sys/conf/files
--- a/sys/conf/files    Fri Oct 28 06:22:26 2022 +0000
+++ b/sys/conf/files    Fri Oct 28 07:16:34 2022 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: files,v 1.1301 2022/07/24 18:04:48 mrg Exp $
+#      $NetBSD: files,v 1.1302 2022/10/28 07:16:34 skrll Exp $
 #      @(#)files.newconf       7.5 (Berkeley) 5/10/93
 
 version        20171118
@@ -144,6 +144,8 @@
 
 defparam opt_maxlwp.h          MAXLWP
 
+defflag opt_efi.h              EFI_RUNTIME
+
 # compatibility options
 #
 defflag opt_compat_netbsd.h    COMPAT_NETBSD
diff -r c4d837ee17fb -r d488cb9c2698 sys/uvm/pmap/pmap.c
--- a/sys/uvm/pmap/pmap.c       Fri Oct 28 06:22:26 2022 +0000
+++ b/sys/uvm/pmap/pmap.c       Fri Oct 28 07:16:34 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.71 2022/10/27 06:20:41 skrll Exp $  */
+/*     $NetBSD: pmap.c,v 1.72 2022/10/28 07:16:34 skrll Exp $  */
 
 /*-
  * Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
@@ -67,7 +67,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.71 2022/10/27 06:20:41 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.72 2022/10/28 07:16:34 skrll Exp $");
 
 /*
  *     Manages physical address maps.
@@ -96,6 +96,7 @@
  */
 
 #include "opt_ddb.h"
+#include "opt_efi.h"
 #include "opt_modular.h"
 #include "opt_multiprocessor.h"
 #include "opt_sysv.h"
@@ -157,6 +158,7 @@
 PMAP_COUNTER(uncached_mappings, "uncached pages mapped");
 PMAP_COUNTER(unmanaged_mappings, "unmanaged pages mapped");
 PMAP_COUNTER(pvtracked_mappings, "pv-tracked unmanaged pages mapped");
+PMAP_COUNTER(efirt_mappings, "EFI RT pages mapped");
 PMAP_COUNTER(managed_mappings, "managed pages mapped");
 PMAP_COUNTER(mappings, "pages mapped");
 PMAP_COUNTER(remappings, "pages remapped");
@@ -237,6 +239,22 @@
 
 struct pmap * const kernel_pmap_ptr = &kernel_pmap_store.kernel_pmap;
 
+#if defined(EFI_RUNTIME)
+static struct pmap efirt_pmap;
+
+pmap_t
+pmap_efirt(void)
+{
+       return &efirt_pmap;
+}
+#else
+static inline pt_entry_t
+pte_make_enter_efirt(paddr_t pa, vm_prot_t prot, u_int flags)
+{
+       panic("not supported");
+}
+#endif
+
 /* The current top of kernel VM - gets updated by pmap_growkernel */
 vaddr_t pmap_curmaxkvaddr;
 
@@ -1354,6 +1372,11 @@
 {
        const bool wired = (flags & PMAP_WIRED) != 0;
        const bool is_kernel_pmap_p = (pmap == pmap_kernel());
+#if defined(EFI_RUNTIME)
+       const bool is_efirt_pmap_p = (pmap == pmap_efirt());
+#else
+       const bool is_efirt_pmap_p = false;
+#endif
        u_int update_flags = (flags & VM_PROT_ALL) != 0 ? PMAP_TLB_INSERT : 0;
 #ifdef UVMHIST
        struct kern_history * const histp =
@@ -1411,6 +1434,8 @@
 
                PMAP_COUNT(pvtracked_mappings);
 #endif
+       } else if (is_efirt_pmap_p) {
+               PMAP_COUNT(efirt_mappings);
        } else {
                /*
                 * Assumption: if it is not part of our managed memory
@@ -1421,11 +1446,14 @@
                PMAP_COUNT(unmanaged_mappings);
        }
 
-       KASSERTMSG(mdpg == NULL || mdpp == NULL, "mdpg %p mdpp %p", mdpg, mdpp);
+       KASSERTMSG(mdpg == NULL || mdpp == NULL || is_efirt_pmap_p,
+           "mdpg %p mdpp %p efirt %s", mdpg, mdpp,
+           is_efirt_pmap_p ? "true" : "false");
 
        struct vm_page_md *md = (mdpg != NULL) ? mdpg : mdpp;
-       pt_entry_t npte = pte_make_enter(pa, md, prot, flags,
-           is_kernel_pmap_p);
+       pt_entry_t npte = is_efirt_pmap_p ?
+           pte_make_enter_efirt(pa, prot, flags) :
+           pte_make_enter(pa, md, prot, flags, is_kernel_pmap_p);
 
        kpreempt_disable();