From: Alexander Graf <agraf@suse.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v5 22/30] arm64: Allow EFI payload code to take exceptions
Date: Fri, 4 Mar 2016 01:10:06 +0100 [thread overview]
Message-ID: <1457050214-117592-23-git-send-email-agraf@suse.de> (raw)
In-Reply-To: <1457050214-117592-1-git-send-email-agraf@suse.de>
There are 2 ways an EFI payload could return into u-boot:
- Callback function
- Exception
While in EFI payload mode, x18 is owned by the payload and may not contain
a valid pointer to gd, so we need to fix it up. We do that properly for the
payload to callback path already.
This patch also adds gd pointer restoral for the exception path.
Signed-off-by: Alexander Graf <agraf@suse.de>
---
arch/arm/lib/interrupts_64.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/arm/lib/interrupts_64.c b/arch/arm/lib/interrupts_64.c
index b476722..7c9cfce 100644
--- a/arch/arm/lib/interrupts_64.c
+++ b/arch/arm/lib/interrupts_64.c
@@ -7,6 +7,7 @@
#include <common.h>
#include <linux/compiler.h>
+#include <efi_loader.h>
int interrupt_init(void)
@@ -41,6 +42,7 @@ void show_regs(struct pt_regs *regs)
*/
void do_bad_sync(struct pt_regs *pt_regs, unsigned int esr)
{
+ efi_restore_gd();
printf("Bad mode in \"Synchronous Abort\" handler, esr 0x%08x\n", esr);
show_regs(pt_regs);
panic("Resetting CPU ...\n");
@@ -51,6 +53,7 @@ void do_bad_sync(struct pt_regs *pt_regs, unsigned int esr)
*/
void do_bad_irq(struct pt_regs *pt_regs, unsigned int esr)
{
+ efi_restore_gd();
printf("Bad mode in \"Irq\" handler, esr 0x%08x\n", esr);
show_regs(pt_regs);
panic("Resetting CPU ...\n");
@@ -61,6 +64,7 @@ void do_bad_irq(struct pt_regs *pt_regs, unsigned int esr)
*/
void do_bad_fiq(struct pt_regs *pt_regs, unsigned int esr)
{
+ efi_restore_gd();
printf("Bad mode in \"Fiq\" handler, esr 0x%08x\n", esr);
show_regs(pt_regs);
panic("Resetting CPU ...\n");
@@ -71,6 +75,7 @@ void do_bad_fiq(struct pt_regs *pt_regs, unsigned int esr)
*/
void do_bad_error(struct pt_regs *pt_regs, unsigned int esr)
{
+ efi_restore_gd();
printf("Bad mode in \"Error\" handler, esr 0x%08x\n", esr);
show_regs(pt_regs);
panic("Resetting CPU ...\n");
@@ -81,6 +86,7 @@ void do_bad_error(struct pt_regs *pt_regs, unsigned int esr)
*/
void do_sync(struct pt_regs *pt_regs, unsigned int esr)
{
+ efi_restore_gd();
printf("\"Synchronous Abort\" handler, esr 0x%08x\n", esr);
show_regs(pt_regs);
panic("Resetting CPU ...\n");
@@ -91,6 +97,7 @@ void do_sync(struct pt_regs *pt_regs, unsigned int esr)
*/
void do_irq(struct pt_regs *pt_regs, unsigned int esr)
{
+ efi_restore_gd();
printf("\"Irq\" handler, esr 0x%08x\n", esr);
show_regs(pt_regs);
panic("Resetting CPU ...\n");
@@ -101,6 +108,7 @@ void do_irq(struct pt_regs *pt_regs, unsigned int esr)
*/
void do_fiq(struct pt_regs *pt_regs, unsigned int esr)
{
+ efi_restore_gd();
printf("\"Fiq\" handler, esr 0x%08x\n", esr);
show_regs(pt_regs);
panic("Resetting CPU ...\n");
@@ -114,6 +122,7 @@ void do_fiq(struct pt_regs *pt_regs, unsigned int esr)
*/
void __weak do_error(struct pt_regs *pt_regs, unsigned int esr)
{
+ efi_restore_gd();
printf("\"Error\" handler, esr 0x%08x\n", esr);
show_regs(pt_regs);
panic("Resetting CPU ...\n");
--
1.8.5.6
next prev parent reply other threads:[~2016-03-04 0:10 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-04 0:09 [U-Boot] [PATCH v5 00/30] EFI payload / application support Alexander Graf
2016-03-04 0:09 ` [U-Boot] [PATCH v5 01/30] thunderx: Calculate TCR dynamically Alexander Graf
2016-03-17 1:59 ` [U-Boot] [U-Boot,v5,01/30] " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 02/30] arm64: Disable TTBR1 maps in EL1 Alexander Graf
2016-03-17 1:59 ` [U-Boot] [U-Boot,v5,02/30] " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 03/30] arm64: Make full va map code more dynamic Alexander Graf
2016-03-17 1:59 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 04/30] thunderx: Move mmu table into board file Alexander Graf
2016-03-17 2:00 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 05/30] zymqmp: Replace home grown mmu code with generic table approach Alexander Graf
2016-03-17 2:00 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 06/30] tegra: " Alexander Graf
2016-03-17 2:00 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 07/30] vexpress64: Add MMU tables Alexander Graf
2016-03-17 2:00 ` [U-Boot] [U-Boot,v5,07/30] " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 08/30] dwmmc: Increase retry timeout Alexander Graf
2016-03-17 2:00 ` [U-Boot] [U-Boot,v5,08/30] " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 09/30] hikey: Add MMU tables Alexander Graf
2016-03-17 2:00 ` [U-Boot] [U-Boot,v5,09/30] " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 10/30] arm64: Remove non-full-va map code Alexander Graf
2016-03-17 2:00 ` [U-Boot] [U-Boot,v5,10/30] " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 11/30] arm64: Only allow dcache disabled in SPL builds Alexander Graf
2016-03-17 2:01 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 12/30] disk/part.c: Expose list of available block drivers Alexander Graf
2016-03-17 2:01 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 13/30] include/efi_api.h: Add more detailed API definitions Alexander Graf
2016-03-17 2:01 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 14/30] efi_loader: Add PE image loader Alexander Graf
2016-03-17 2:01 ` [U-Boot] [U-Boot,v5,14/30] " Tom Rini
2016-03-04 0:09 ` [U-Boot] [PATCH v5 15/30] efi_loader: Add boot time services Alexander Graf
2016-03-17 2:01 ` [U-Boot] [U-Boot,v5,15/30] " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 16/30] efi_loader: Add console interface Alexander Graf
2016-03-17 2:01 ` [U-Boot] [U-Boot,v5,16/30] " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 17/30] efi_loader: Add runtime services Alexander Graf
2016-03-17 2:01 ` [U-Boot] [U-Boot,v5,17/30] " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 18/30] efi_loader: Add disk interfaces Alexander Graf
2016-03-17 2:01 ` [U-Boot] [U-Boot,v5,18/30] " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 19/30] efi_loader: Add "bootefi" command Alexander Graf
2016-03-09 23:27 ` [U-Boot] [PATCH v6 " Alexander Graf
2016-03-17 2:01 ` [U-Boot] [U-Boot,v6,19/30] " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 20/30] efi_loader: Implement memory allocation and map Alexander Graf
2016-03-17 2:02 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 21/30] arm64: Allow exceptions to return Alexander Graf
2016-03-17 2:02 ` [U-Boot] [U-Boot,v5,21/30] " Tom Rini
2016-03-04 0:10 ` Alexander Graf [this message]
2016-03-17 2:02 ` [U-Boot] [U-Boot, v5, 22/30] arm64: Allow EFI payload code to take exceptions Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 23/30] efi_loader: hook up in build environment Alexander Graf
2016-03-17 2:02 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 24/30] efi_loader: Add distro boot script for removable media Alexander Graf
2016-03-09 23:05 ` Alexander Graf
2016-03-09 23:16 ` Tom Rini
2016-03-09 23:26 ` [U-Boot] [PATCH v6 " Alexander Graf
2016-03-17 2:02 ` [U-Boot] [U-Boot, v6, " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 25/30] efi_loader: Add README section in README.efi Alexander Graf
2016-03-17 2:02 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 26/30] efi_loader: Add MAINTAINERS entry Alexander Graf
2016-03-17 2:02 ` [U-Boot] [U-Boot,v5,26/30] " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 27/30] arm64: Replace fdt_name env variables with fdtfile Alexander Graf
2016-03-17 2:02 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 28/30] arm: Allow EFI payload code to take exceptions Alexander Graf
2016-03-17 2:03 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 29/30] efi_loader: Call fdt preparation functions Alexander Graf
2016-03-17 2:03 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 0:10 ` [U-Boot] [PATCH v5 30/30] efi_loader: Pass proper device path in on boot Alexander Graf
2016-03-17 2:03 ` [U-Boot] [U-Boot, v5, " Tom Rini
2016-03-04 9:19 ` [U-Boot] [PATCH] efi_loader: Reserve 2 additional pages for fdt Alexander Graf
2016-03-04 9:41 ` Leif Lindholm
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