linux-kernel - [PATCH v4 03/18] KVM: arm64: selftests: Use read/write definitions from sysreg.h

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Message-Id: <20210909013818.1191270-4-rananta@google.com>
Date:   Thu,  9 Sep 2021 01:38:03 +0000
From:   Raghavendra Rao Ananta <rananta@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, Marc Zyngier <maz@...nel.org>,
        Andrew Jones <drjones@...hat.com>,
        James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Peter Shier <pshier@...gle.com>,
        Ricardo Koller <ricarkol@...gle.com>,
        Oliver Upton <oupton@...gle.com>,
        Reiji Watanabe <reijiw@...gle.com>,
        Jing Zhang <jingzhangos@...gle.com>,
        Raghavendra Rao Anata <rananta@...gle.com>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: [PATCH v4 03/18] KVM: arm64: selftests: Use read/write definitions
 from sysreg.h

Make use of the register read/write definitions from
sysreg.h, instead of the existing definitions. A syntax
correction is needed for the files that use write_sysreg()
to make it compliant with the new (kernel's) syntax.

Signed-off-by: Raghavendra Rao Ananta <rananta@...gle.com>
---
 .../selftests/kvm/aarch64/debug-exceptions.c  | 28 +++++++++----------
 .../selftests/kvm/include/aarch64/processor.h | 13 +--------
 2 files changed, 15 insertions(+), 26 deletions(-)

diff --git a/tools/testing/selftests/kvm/aarch64/debug-exceptions.c b/tools/testing/selftests/kvm/aarch64/debug-exceptions.c
index e5e6c92b60da..11fd23e21cb4 100644
--- a/tools/testing/selftests/kvm/aarch64/debug-exceptions.c
+++ b/tools/testing/selftests/kvm/aarch64/debug-exceptions.c
@@ -34,16 +34,16 @@ static void reset_debug_state(void)
 {
 	asm volatile("msr daifset, #8");
 
-	write_sysreg(osdlr_el1, 0);
-	write_sysreg(oslar_el1, 0);
+	write_sysreg(0, osdlr_el1);
+	write_sysreg(0, oslar_el1);
 	isb();
 
-	write_sysreg(mdscr_el1, 0);
+	write_sysreg(0, mdscr_el1);
 	/* This test only uses the first bp and wp slot. */
-	write_sysreg(dbgbvr0_el1, 0);
-	write_sysreg(dbgbcr0_el1, 0);
-	write_sysreg(dbgwcr0_el1, 0);
-	write_sysreg(dbgwvr0_el1, 0);
+	write_sysreg(0, dbgbvr0_el1);
+	write_sysreg(0, dbgbcr0_el1);
+	write_sysreg(0, dbgwcr0_el1);
+	write_sysreg(0, dbgwvr0_el1);
 	isb();
 }
 
@@ -53,14 +53,14 @@ static void install_wp(uint64_t addr)
 	uint32_t mdscr;
 
 	wcr = DBGWCR_LEN8 | DBGWCR_RD | DBGWCR_WR | DBGWCR_EL1 | DBGWCR_E;
-	write_sysreg(dbgwcr0_el1, wcr);
-	write_sysreg(dbgwvr0_el1, addr);
+	write_sysreg(wcr, dbgwcr0_el1);
+	write_sysreg(addr, dbgwvr0_el1);
 	isb();
 
 	asm volatile("msr daifclr, #8");
 
 	mdscr = read_sysreg(mdscr_el1) | MDSCR_KDE | MDSCR_MDE;
-	write_sysreg(mdscr_el1, mdscr);
+	write_sysreg(mdscr, mdscr_el1);
 	isb();
 }
 
@@ -70,14 +70,14 @@ static void install_hw_bp(uint64_t addr)
 	uint32_t mdscr;
 
 	bcr = DBGBCR_LEN8 | DBGBCR_EXEC | DBGBCR_EL1 | DBGBCR_E;
-	write_sysreg(dbgbcr0_el1, bcr);
-	write_sysreg(dbgbvr0_el1, addr);
+	write_sysreg(bcr, dbgbcr0_el1);
+	write_sysreg(addr, dbgbvr0_el1);
 	isb();
 
 	asm volatile("msr daifclr, #8");
 
 	mdscr = read_sysreg(mdscr_el1) | MDSCR_KDE | MDSCR_MDE;
-	write_sysreg(mdscr_el1, mdscr);
+	write_sysreg(mdscr, mdscr_el1);
 	isb();
 }
 
@@ -88,7 +88,7 @@ static void install_ss(void)
 	asm volatile("msr daifclr, #8");
 
 	mdscr = read_sysreg(mdscr_el1) | MDSCR_KDE | MDSCR_SS;
-	write_sysreg(mdscr_el1, mdscr);
+	write_sysreg(mdscr, mdscr_el1);
 	isb();
 }
 
diff --git a/tools/testing/selftests/kvm/include/aarch64/processor.h b/tools/testing/selftests/kvm/include/aarch64/processor.h
index 96578bd46a85..bed4ffa70905 100644
--- a/tools/testing/selftests/kvm/include/aarch64/processor.h
+++ b/tools/testing/selftests/kvm/include/aarch64/processor.h
@@ -8,6 +8,7 @@
 #define SELFTEST_KVM_PROCESSOR_H
 
 #include "kvm_util.h"
+#include "sysreg.h"
 #include <linux/stringify.h>
 #include <linux/types.h>
 
@@ -119,18 +120,6 @@ void vm_install_exception_handler(struct kvm_vm *vm,
 void vm_install_sync_handler(struct kvm_vm *vm,
 		int vector, int ec, handler_fn handler);
 
-#define write_sysreg(reg, val)						  \
-({									  \
-	u64 __val = (u64)(val);						  \
-	asm volatile("msr " __stringify(reg) ", %x0" : : "rZ" (__val));	  \
-})
-
-#define read_sysreg(reg)						  \
-({	u64 val;							  \
-	asm volatile("mrs %0, "__stringify(reg) : "=r"(val) : : "memory");\
-	val;								  \
-})
-
 #define isb()		asm volatile("isb" : : : "memory")
 #define dsb(opt)	asm volatile("dsb " #opt : : : "memory")
 #define dmb(opt)	asm volatile("dmb " #opt : : : "memory")
-- 
2.33.0.153.gba50c8fa24-goog