From: Julien Thierry <julien.thierry@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, daniel.thompson@linaro.org,
joel@joelfernandes.org, marc.zyngier@arm.com,
christoffer.dall@arm.com, james.morse@arm.com,
catalin.marinas@arm.com, will.deacon@arm.com,
mark.rutland@arm.com, Julien Thierry <julien.thierry@arm.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
linux-efi@vger.kernel.org
Subject: [PATCH v9 11/26] efi: Let architectures decide the flags that should be saved/restored
Date: Mon, 21 Jan 2019 15:33:30 +0000 [thread overview]
Message-ID: <1548084825-8803-12-git-send-email-julien.thierry@arm.com> (raw)
In-Reply-To: <1548084825-8803-1-git-send-email-julien.thierry@arm.com>
Currently, irqflags are saved before calling runtime services and
checked for mismatch on return.
Provide a pair of overridable macros to save and restore (if needed) the
state that need to be preserved on return from a runtime service.
This allows to check for flags that are not necesarly related to
irqflags.
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: linux-efi@vger.kernel.org
---
drivers/firmware/efi/runtime-wrappers.c | 17 +++++++++++++++--
include/linux/efi.h | 5 +++--
2 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/drivers/firmware/efi/runtime-wrappers.c b/drivers/firmware/efi/runtime-wrappers.c
index 8903b9c..2f4b68b 100644
--- a/drivers/firmware/efi/runtime-wrappers.c
+++ b/drivers/firmware/efi/runtime-wrappers.c
@@ -89,11 +89,24 @@
efi_rts_work.status; \
})
+#ifndef arch_efi_save_flags
+#define arch_efi_save_flags(state_flags) local_save_flags(state_flags)
+#define arch_efi_restore_flags(state_flags) local_irq_restore(state_flags)
+#endif
+
+inline unsigned long efi_call_virt_save_flags(void)
+{
+ unsigned long flags;
+
+ arch_efi_save_flags(flags);
+ return flags;
+}
+
void efi_call_virt_check_flags(unsigned long flags, const char *call)
{
unsigned long cur_flags, mismatch;
- local_save_flags(cur_flags);
+ cur_flags = efi_call_virt_save_flags();
mismatch = flags ^ cur_flags;
if (!WARN_ON_ONCE(mismatch & ARCH_EFI_IRQ_FLAGS_MASK))
@@ -102,7 +115,7 @@ void efi_call_virt_check_flags(unsigned long flags, const char *call)
add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_NOW_UNRELIABLE);
pr_err_ratelimited(FW_BUG "IRQ flags corrupted (0x%08lx=>0x%08lx) by EFI %s\n",
flags, cur_flags, call);
- local_irq_restore(flags);
+ arch_efi_restore_flags(flags);
}
/*
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 45ff763..bd80b7e 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -1607,6 +1607,7 @@ efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
bool efi_runtime_disabled(void);
extern void efi_call_virt_check_flags(unsigned long flags, const char *call);
+extern unsigned long efi_call_virt_save_flags(void);
enum efi_secureboot_mode {
efi_secureboot_mode_unset,
@@ -1652,7 +1653,7 @@ enum efi_secureboot_mode {
\
arch_efi_call_virt_setup(); \
\
- local_save_flags(__flags); \
+ __flags = efi_call_virt_save_flags(); \
__s = arch_efi_call_virt(p, f, args); \
efi_call_virt_check_flags(__flags, __stringify(f)); \
\
@@ -1667,7 +1668,7 @@ enum efi_secureboot_mode {
\
arch_efi_call_virt_setup(); \
\
- local_save_flags(__flags); \
+ __flags = efi_call_virt_save_flags(); \
arch_efi_call_virt(p, f, args); \
efi_call_virt_check_flags(__flags, __stringify(f)); \
\
--
1.9.1
next prev parent reply other threads:[~2019-01-21 15:34 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-21 15:33 [PATCH v9 00/26] arm64: provide pseudo NMI with GICv3 Julien Thierry
2019-01-21 15:33 ` [PATCH v9 01/26] arm64: Fix HCR.TGE status for NMI contexts Julien Thierry
2019-01-28 11:48 ` James Morse
2019-01-28 15:42 ` Julien Thierry
2019-01-31 8:19 ` Christoffer Dall
2019-01-31 8:56 ` Julien Thierry
2019-01-31 9:27 ` Christoffer Dall
2019-01-31 9:40 ` Julien Thierry
2019-01-31 9:48 ` Christoffer Dall
2019-01-31 9:53 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 02/26] arm64: Remove unused daif related functions/macros Julien Thierry
2019-01-28 9:21 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 03/26] arm64: cpufeature: Set SYSREG_GIC_CPUIF as a boot system feature Julien Thierry
2019-01-28 9:22 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 04/26] arm64: cpufeature: Add cpufeature for IRQ priority masking Julien Thierry
2019-01-28 9:24 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 05/26] arm/arm64: gic-v3: Add PMR and RPR accessors Julien Thierry
2019-01-28 9:25 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 06/26] irqchip/gic-v3: Switch to PMR masking before calling IRQ handler Julien Thierry
2019-01-28 9:30 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 07/26] arm64: ptrace: Provide definitions for PMR values Julien Thierry
2019-01-28 9:37 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 08/26] arm64: Make PMR part of task context Julien Thierry
2019-01-28 9:42 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 09/26] arm64: Unmask PMR before going idle Julien Thierry
2019-01-22 15:23 ` Catalin Marinas
2019-01-22 20:18 ` Ard Biesheuvel
2019-01-23 8:56 ` Julien Thierry
2019-01-23 9:38 ` Ard Biesheuvel
2019-01-28 9:44 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 10/26] arm64: kvm: Unmask PMR before entering guest Julien Thierry
2019-01-28 9:58 ` Marc Zyngier
2019-01-30 12:07 ` Christoffer Dall
2019-01-30 14:58 ` Julien Thierry
2019-01-21 15:33 ` Julien Thierry [this message]
2019-01-21 15:42 ` [PATCH v9 11/26] efi: Let architectures decide the flags that should be saved/restored Ard Biesheuvel
2019-01-23 9:04 ` Julien Thierry
2019-01-28 10:00 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 12/26] arm64: irqflags: Use ICC_PMR_EL1 for interrupt masking Julien Thierry
2019-01-21 15:45 ` Ard Biesheuvel
2019-01-21 18:05 ` Julien Thierry
2019-01-22 15:21 ` Catalin Marinas
2019-01-23 10:44 ` Julien Thierry
2019-01-30 11:52 ` Julien Thierry
2019-01-21 15:33 ` [PATCH v9 13/26] arm64: daifflags: Include PMR in daifflags restore operations Julien Thierry
2019-01-28 10:37 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 14/26] arm64: alternative: Allow alternative status checking per cpufeature Julien Thierry
2019-01-28 11:00 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 15/26] arm64: alternative: Apply alternatives early in boot process Julien Thierry
2019-01-28 11:17 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 16/26] irqchip/gic-v3: Factor group0 detection into functions Julien Thierry
2019-01-28 11:19 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 17/26] arm64: Switch to PMR masking when starting CPUs Julien Thierry
2019-01-28 11:21 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 18/26] arm64: gic-v3: Implement arch support for priority masking Julien Thierry
2019-01-28 11:23 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 19/26] irqchip/gic-v3: Detect if GIC can support pseudo-NMIs Julien Thierry
2019-01-28 11:39 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 20/26] irqchip/gic-v3: Handle pseudo-NMIs Julien Thierry
2019-01-28 11:59 ` Marc Zyngier
2019-01-29 11:33 ` Julien Thierry
2019-01-29 12:31 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 21/26] irqchip/gic: Add functions to access irq priorities Julien Thierry
2019-01-28 12:04 ` Marc Zyngier
2019-01-29 11:36 ` Julien Thierry
2019-01-21 15:33 ` [PATCH v9 22/26] irqchip/gic-v3: Allow interrupts to be set as pseudo-NMI Julien Thierry
2019-01-26 10:19 ` liwei (GF)
2019-01-26 10:41 ` Marc Zyngier
2019-01-28 8:57 ` Julien Thierry
2019-01-28 13:59 ` liwei (GF)
2019-01-28 14:49 ` Julien Thierry
2019-01-28 12:08 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 23/26] arm64: Handle serror in NMI context Julien Thierry
2019-01-28 12:26 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 24/26] arm64: Skip preemption when exiting an NMI Julien Thierry
2019-01-28 12:34 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 25/26] arm64: Skip irqflags tracing for NMI in IRQs disabled context Julien Thierry
2019-01-28 12:40 ` Marc Zyngier
2019-01-21 15:33 ` [PATCH v9 26/26] arm64: Enable the support of pseudo-NMIs Julien Thierry
2019-01-28 12:47 ` Marc Zyngier
2019-01-30 13:46 ` Julien Thierry
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