build(deps): bump github/codeql-action from 1.0.26 to 1.0.27

Bumps [github/codeql-action](https://github.com/github/codeql-action) from 1.0.26 to 1.0.27.
- [Release notes](https://github.com/github/codeql-action/releases)
- [Changelog](https://github.com/github/codeql-action/blob/main/CHANGELOG.md)
- [Commits](5f53256358...cd783c8a29)

---
updated-dependencies:
- dependency-name: github/codeql-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/codeql-analysis.yml

@@ -41,7 +41,7 @@ jobs:
       uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
 
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@5f532563584d71fdef14ee64d17bafb34f751ce5
+      uses: github/codeql-action/init@cd783c8a29bdcf5a5c79c5137889e24651fa626c
       with:
         languages: ${{ matrix.language }}
         config-file: ./.github/codeql-config.yml
@@ -49,7 +49,7 @@ jobs:
     - run: sudo -E .github/workflows/unit_tests.sh SETUP
 
     - name: Autobuild
-      uses: github/codeql-action/autobuild@5f532563584d71fdef14ee64d17bafb34f751ce5
+      uses: github/codeql-action/autobuild@cd783c8a29bdcf5a5c79c5137889e24651fa626c
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@5f532563584d71fdef14ee64d17bafb34f751ce5
+      uses: github/codeql-action/analyze@cd783c8a29bdcf5a5c79c5137889e24651fa626c

man/loader.conf.xml

@@ -199,8 +199,8 @@
       <varlistentry>
         <term>beep</term>
 
-        <listitem><para>Beep once as soon as the boot menu is shown (default disabled). Currently,
+        <listitem><para>Beep n times when the n-th entry in the boot menu is shown (default disabled).
-        only x86 is supported, where it uses the PC speaker.</para></listitem>
+        Currently, only x86 is supported, where it uses the PC speaker.</para></listitem>
       </varlistentry>
 
       <varlistentry>

src/boot/efi/boot.c

@@ -590,7 +590,7 @@ static BOOLEAN menu_run(
         _cleanup_freepool_ CHAR16 *clearline = NULL, *status = NULL;
         UINT32 timeout_efivar_saved = config->timeout_sec_efivar;
         UINT32 timeout_remain = config->timeout_sec == TIMEOUT_MENU_FORCE ? 0 : config->timeout_sec;
-        BOOLEAN exit = FALSE, run = TRUE, firmware_setup = FALSE, do_beep = config->beep;
+        BOOLEAN exit = FALSE, run = TRUE, firmware_setup = FALSE;
         INT64 console_mode_initial = ST->ConOut->Mode->Mode, console_mode_efivar_saved = config->console_mode_efivar;
         UINTN default_efivar_saved = config->idx_default_efivar;
 
@@ -727,10 +727,9 @@ static BOOLEAN menu_run(
                         ST->ConOut->OutputString(ST->ConOut, clearline + 1 + x + len);
                 }
 
-                if (do_beep) {
+                /* Beep several times so that the selected entry can be distinguished. */
-                        beep();
+                if (config->beep)
-                        do_beep = FALSE;
+                        beep(idx_highlight + 1);
-                }
 
                 err = console_key_read(&key, timeout_remain > 0 ? 1000 * 1000 : UINT64_MAX);
                 if (err == EFI_TIMEOUT) {

src/boot/efi/util.c

@@ -769,10 +769,11 @@ static inline void outb(UINT16 port, UINT8 value) {
         asm volatile("outb %0, %1" : : "a"(value), "Nd"(port));
 }
 
-void beep(void) {
+void beep(UINTN beep_count) {
         enum {
                 PITCH                = 500,
-                DURATION_USEC        = 100 * 1000,
+                BEEP_DURATION_USEC   = 100 * 1000,
+                WAIT_DURATION_USEC   = 400 * 1000,
 
                 PIT_FREQUENCY        = 0x1234dd,
                 SPEAKER_CONTROL_PORT = 0x61,
@@ -788,15 +789,22 @@ void beep(void) {
         outb(TIMER_CONTROL2_PORT, counter & 0xFF);
         outb(TIMER_CONTROL2_PORT, (counter >> 8) & 0xFF);
 
-        /* Turn speaker on. */
         UINT8 value = inb(SPEAKER_CONTROL_PORT);
+
+        while (beep_count > 0) {
+                /* Turn speaker on. */
                 value |= SPEAKER_ON_MASK;
                 outb(SPEAKER_CONTROL_PORT, value);
 
-        BS->Stall(DURATION_USEC);
+                BS->Stall(BEEP_DURATION_USEC);
 
                 /* Turn speaker off. */
                 value &= ~SPEAKER_ON_MASK;
                 outb(SPEAKER_CONTROL_PORT, value);
+
+                beep_count--;
+                if (beep_count > 0)
+                        BS->Stall(WAIT_DURATION_USEC);
+        }
 }
 #endif

src/boot/efi/util.h

@@ -171,7 +171,7 @@ extern UINT8 _text, _data;
 #endif
 
 #if defined(__i386__) || defined(__x86_64__)
-void beep(void);
+void beep(UINTN beep_count);
 #else
-static inline void beep(void) {}
+static inline void beep(UINTN beep_count) {}
 #endif